Papers - MATSUDA Tatsuro
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Production cross sections of light and charmed mesons in 𝑒+𝑒− annihilation near 10.58 GeV Reviewed
R. Seidl , I. Adachi et al.
Physical Review D 111 ( 5 ) 052003 - pp.21 2025.3
Publishing type：Research paper (scientific journal)
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Search for ℎ𝑏(2𝑃)→𝛾𝜒𝑏𝐽(1𝑃) at √𝑠=10.860 GeV Reviewed
A. Boschetti , R. Mussa et al.
Physical Review D 111 ( 1 ) L011102 - pp.6 2025.1
Publishing type：Research paper (scientific journal)
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Evidence of ℎ𝑏(2P)→ϒ(1S)𝜂 Decay and Search for ℎ𝑏(1P,2P)→ϒ(1S)𝜋0 with the Belle Detector Reviewed
E. Kovalenko , I. Adachi et al.
Physical Review Letters 133 ( 26 ) 261901 - pp.6 2024.12
Publishing type：Research paper (scientific journal)
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Search for the baryon number and lepton number violating decays 𝜏−→Λ𝜋− and 𝜏−→ ¯ Λ 𝜋− at Belle II Reviewed
I. Adachi , L. Aggarwal et al.
Physical Review D 110 ( 11 ) 112003 - pp.8 2024.12
Publishing type：Research paper (scientific journal)
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Test of lepton flavor universality with a measurement of 𝑅(𝐷*) using hadronic 𝐵 tagging at the Belle II experiment Reviewed
I. Adachi , K. Adamczyk et al.
Physical Review D 110 ( 7 ) 072020 - pp.17 2024.10
Publishing type：Research paper (scientific journal)
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Measurement of the energy dependence of the e+e− → B#EB(/)-#ER , , and B*#EB(/)-#ER* cross sections at Belle II Reviewed
The Belle II collaboration, I. Adachi et al.
Journal of High Energy Physics 2024 ( 114 ) 1 - 32 2024.10
Publishing type：Research paper (scientific journal)
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Measurement of Angular Coefficients of #EB(/)-#ER →𝐷*ℓ #Eν(/)-#ERℓ: Implications for |𝑉𝑐b| and Tests of Lepton Flavor Universality Reviewed
M.T.Prim ,F.Bernlochner et al.
Physical Review Letters 133 ( 7 ) 131801 - pp.7 2024.9
Language：English Publishing type：Research paper (scientific journal)
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High-Statistics Measurement of Collins and Sivers Asymmetries for Transversely Polarized Deuterons Reviewed
G. D. Alexeev 28, M. G. Alexeev et al.
Physical Review Letters 133 ( 10 ) 101903 - pp.7 2024.9
Publishing type：Research paper (scientific journal)
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Measurements of the Branching Fraction, Polarization, and C P Asymmetry for the Decay B＃U0＃UR → ω ω Reviewed
Y. Guan , A. J. Schwartz et al.
Physical Review Letters 133 ( 8 ) 081801 - pp.7 2024.8
Publishing type：Research paper (scientific journal)
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Search for Baryon-Number-Violating Processes in 𝐵− Decays to the ¯ Ξ 0 𝑐 ¯ Λ − 𝑐 Final State Reviewed
T. Gu , V. Savinov et al.
Physical Review Letters 133 ( 7 ) 071802 - pp.7 2024.8
Publishing type：Research paper (scientific journal)
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Final COMPASS Results on the Transverse-Spin-Dependent Azimuthal Asymmetries in the Pion-Induced Drell-Yan Process Reviewed
G. D. Alexeev 28, M. G. Alexeev et al.
Physical Review Letters 133 ( 7 ) 071902 - pp.8 2024.8
Publishing type：Research paper (scientific journal)
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Search for two-body 𝐵 meson decays to Λ0 and Ω(*)0𝑐 Reviewed
V. Savinov , I. Adachi et al.
Physical Review D 110 ( 3 ) L031102 - pp.6 2024.8
Publishing type：Research paper (scientific journal)
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Measurement of 𝐶𝑃 asymmetries in 𝐵0→𝐾0𝑆𝐾0𝑆𝐾0𝑆 decays at Belle II Reviewed
I. Adachi , L. Aggarwal et al.
Physical Review D 109 ( 11 ) 112020 - pp.11 2024.6
Publishing type：Research paper (scientific journal)
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Evidence for 𝐵+→𝐾#u+#UR #E𝜈(/)-#ER 𝜈 decays Reviewed
I. Adachi , K. Adamczyk et al.
Physical Review D 109 ( 11 ) 112006 - pp.29 2024.6
Publishing type：Research paper (scientific journal)
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First Measurement of as an Inclusive Test of the Anomaly Reviewed
I. Adachi , K. Adamczyk et al.
Physical Review Letters 132 ( 21 ) 131801 - pp.8 2024.5
Publishing type：Research paper (scientific journal)
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Measurement of branching-fraction ratios and CP asymmetries in B± → DCP±K± decays at Belle and Belle II Reviewed
The Belle and Belle II collaboration, I. Adachi et al.
Journal of High Energy Physics 2024 ( 212 ) 1 - 26 2024.5
Publishing type：Research paper (scientific journal)
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Search for the e+e−→ ηb(1S) ω and e+e−→ χb0(1P) ω processes at √ s = 10.745 GeV Reviewed
I. Adachi , L. Aggarwal, T. Matsuda et al.
Physical Review D 109 072013 - 9 pages 2024.4
Publishing type：Research paper (scientific journal)
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Search for the 𝑒+𝑒− →𝜂𝑏(1𝑆)𝜔 and 𝑒+𝑒− →𝜒𝑏0(1𝑃)𝜔 processes at √𝑠 =10.745 GeV Reviewed
I. Adachi , L. Aggarwal et al.
Physical Review D 109 ( 7 ) 072013 - pp.9 2024.4
Publishing type：Research paper (scientific journal)
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Search for charged-lepton flavor violation in Υ(2S) → ℓ∓τ±(ℓ = e, μ) decays at Belle Reviewed
The Belle collaboration, R. Dhamija, S. Nishida, T. Matsuda et al.
Journal of High Energy Physics 2024 187 - 10 pages 2024.2
Publishing type：Research paper (scientific journal)
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Search for the decay Bs0 → J / ψ π0 at Belle experiment Reviewed
D. Kumar, B. Bhuyan, T. Matsuda et al.
Physical Review D 109 032007 - 7pages 2024.2
Language：English Publishing type：Research paper (scientific journal)
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Search for baryon and lepton number violating decays D → p ℓ Reviewed
S. Maity , R. Garg, T. Matsuda et al.
Physical Review D 109 L031101 - 6pages 2024.2
Language：English Publishing type：Research paper (scientific journal)
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Measurement of branching fractions and direct C P asymmetries for B → K π and B → π π decays at Belle II Reviewed
I. Adachi , L. Aggarwal, T. Matsuda et al.
Physical Review D 109 012001 - 12pages 2024.1
Publishing type：Research paper (scientific journal)
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Observation of charmed strange meson pair production in Υ (2S) decays and in e+e− annihilation at √ s = 10.52 GeV Reviewed
B. S. Gao , W. J. Zhu, T. Matsuda et al.
Physical Review D 108 112015 - 11 pages 2023.12
Publishing type：Research paper (scientific journal)
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Search for a long-lived spin-0 mediator in b → s transitions at the Belle II experiment Reviewed
I. Adachi , K. Adamczyk, T. Matsuda et al.
Physical Review D 108 L111104 - 7 pages 2023.12
Publishing type：Research paper (scientific journal)
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Search for CP violation in D(s)+ → K+Ks0 h+ h− (h = K, π) decays and observation of the Cabibbo-suppressed decay Ds+ → K+ K− Ks0 π+ Reviewed
H. K. Moon , E. Won, T. Matsuda et al.
Physical Review D 108 L111102 - 7 pages 2023.12
Publishing type：Research paper (scientific journal)
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Study of B+ →p #En(/)#ERπ0 Reviewed
Chu K.N., Lin Y.R., Matsuda T., et al.
Physical Review D 108 ( 11 ) 112007 - 7 pages 2023.12
Publishing type：Research paper (scientific journal) Publisher：Physical Review D
We search for the tree-diagram dominated process B+→pn¯π0, using a data sample of 772×106BB¯ pairs collected at the γ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. This is the first search with the Belle detector for a decay mode including an antineutron. No significant signal is observed and a 90% credible upper limit on the branching fraction is set at 6.3×10-6.
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Determination of | Vcb | using #EB(/)-#ER0 → D *+ ℓ− #Eν(/)-#ER ℓ decays with Belle II Reviewed
I. Adachi , L. Aggarwal, T. Matsuda et al.
Physical Review D 108 092013 - 26pages 2023.11
Publishing type：Research paper (scientific journal)
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Search for a Heavy Neutrino in τ Decays at Belle Reviewed
D. Liventsev , I. Adachi, T. Matsuda et al.
Physical Review Letters 131 211802 - 7 pages 2023.11
Publishing type：Research paper (scientific journal)
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First Simultaneous Determination of Inclusive and Exclusive | Vub | Reviewed
L. Cao, F. Bernlochner, T. Matsduda et al.
Physical Review Letters 131 211801 - 7 pages 2023.11
Publishing type：Research paper (scientific journal)
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Tests of Light-Lepton Universality in Angular Asymmetries of B0 → D*−ℓν Decays Reviewed
I. Adachi , K. Adamczyk, T. Matsuda et al.
Physical Review Letters 131 181801 - 7 pages 2023.10
Publishing type：Research paper (scientific journal)
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Precise Measurement of the Ds+ Lifetime at Belle II Reviewed
I. Adachi , L. Aggarwal, T. Matsuda et al.
Physical Review Letters 131 171803 - 7 pages 2023.10
Publishing type：Research paper (scientific journal)
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Measurement of CP asymmetries in B0 → ϕ Ks0 decays with Belle II Reviewed
I. Adachi , K. Adamczyk, T. Matsuda et al.
Physical Review D 108 072012 - 10 pages 2023.10
Publishing type：Research paper (scientific journal)
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Spin density matrix elements in exclusive ρ meson muoproduction Reviewed
Alexeev G.D., Alexeev M.G., Matsuda T., et al.
European Physical Journal C 83 ( 10 ) 924 - 25 pages 2023.10
Publishing type：Research paper (scientific journal) Publisher：European Physical Journal C
We report on a measurement of Spin Density Matrix Elements (SDMEs) in hard exclusive ρ meson muoproduction at COMPASS using 160 GeV/c polarised μ+ and μ- beams impinging on a liquid hydrogen target. The measurement covers the kinematic range 5.0 GeV/ c2< W< 17.0 GeV/ c2 , 1.0 (GeV/c) 2< Q2< 10.0 (GeV/c) 2 and 0.01 (GeV/c) 2<pT2< 0.5 (GeV/c) 2 . Here, W denotes the mass of the final hadronic system, Q2 the virtuality of the exchanged photon, and pT the transverse momentum of the ρ meson with respect to the virtual-photon direction. The measured non-zero SDMEs for the transitions of transversely polarised virtual photons to longitudinally polarised vector mesons (γT∗→VL) indicate a violation of s-channel helicity conservation. Additionally, we observe a dominant contribution of natural-parity-exchange transitions and a very small contribution of unnatural-parity-exchange transitions, which is compatible with zero within experimental uncertainties. The results provide important input for modelling Generalised Parton Distributions (GPDs). In particular, they may allow one to evaluate in a model-dependent way the role of parton helicity-flip GPDs in exclusive ρ production.
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Transverse-spin-dependent azimuthal asymmetries of pion and kaon pairs produced in muon-proton and muon-deuteron semi-inclusive deep inelastic scattering Reviewed
G.D. Alexeev, M.G. Alexeev, T. Matsuda et al.
Physics Letters B 845 138155 - 8 pages 2023.10
Publishing type：Research paper (scientific journal)
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Search for a τ+τ− Resonance in e+e− → μ+μ−τ+τ− Events with the Belle II Experiment Reviewed
I. Adachi , K. Adamczyk, T. Matsuda et al.
Physical Review Letters 131 121802 - 8 pages 2023.9
Publishing type：Research paper (scientific journal)
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Measurement of CP asymmetries and branching-fraction ratios for B± → DK± and Dπ± with D → K±π∓ using Belle and Belle II data Reviewed
The Belle and Belle II collaborations, I. Adachi, L. Aggarwal, T. Matsuda et al.
Journal of High Energy Physics 2023 146 - 23 pages 2023.9
Publishing type：Research paper (scientific journal)
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Measurement of CP Violation in B0 → Ks0 π0 Decays at Belle II Reviewed
I. Adachi , K. Adamczyk, T. Matsuda et al.
Physical Review D 131 111803 - 8 pages 2023.9
Publishing type：Research paper (scientific journal)
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Search for Bs→ ℓ∓τ± with the semi-leptonic tagging method at Belle Reviewed
The Belle collaboration, L. Nayak, S. Nishida, T. Matsuda et al.
Journal of High Energy Physics 2023 178 - 11 pages 2023.8
Publishing type：Research paper (scientific journal)
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Measurement of the e+e− → Bs0#ERB(/)-#ERs0X cross section in the energy range from 10.63 to 11.02 GeV using inclusive Ds+ and D0 production Reviewed
The Belle collaboration, V. Zhukova, R. Mizuk, T. Matsuda et al.
Journal of High Energy Physics 2023 131 - 27 pages 2023.8
Publishing type：Research paper (scientific journal)
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Search for the double-charmonium state with ηcJ/ψ at Belle Reviewed
The Belle collaboration, J. H. Yin, Y. B. Li, T. Matsuda et al.
Journal of High Energy Physics 2023 121 - 19 pages 2023.8
Publishing type：Research paper (scientific journal)
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Collins and Sivers transverse-spin asymmetries in inclusive muoproduction of ρ0 mesons Reviewed
Alexeev G.D., Alexeev M.G., Matsuda T., et al.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 843 137950 - 10 pages 2023.8
Publishing type：Research paper (scientific journal) Publisher：Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
The production of vector mesons in deep inelastic scattering is an interesting yet scarcely explored channel to study the transverse spin structure of the nucleon and the spin-dependence of fragmentation. The COMPASS collaboration has performed the first measurement of the Collins and Sivers asymmetries for inclusively produced ρ0 mesons. The analysis is based on the data set collected in deep inelastic scattering in 2010 using a 160GeV/c μ+ beam impinging on a transversely polarized NH3 target. The ρ0 mesons are selected from oppositely charged hadron pairs, and the asymmetries are extracted as a function of the Bjorken-x variable, the transverse momentum of the pair and the fraction of the energy z carried by the pair. Indications for positive Collins and Sivers asymmetries are observed.
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Measurement of the τ -lepton mass with the Belle II experiment Reviewed
I. Adachi , K. Adamczyk, T. Matsuda et al.
Physical Review D 108 032006 - 9 pages 2023.8
Publishing type：Research paper (scientific journal)
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The polarized deuteron target at COMPASS in 2022
N. Doshita*, Y. Ito, T. Matsuda et al.
Proceedings of Science 433 017 - 4 pages 2023.8
Publishing type：Research paper (scientific journal)
DOI： 10.22323/1.433.0037
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First Measurement of the Michel Parameter ξ′ in the τ− → μ− ¯ νμ ντ Decay at Belle Reviewed
D. Bodrov , P. Pakhlov, T. Matsuda et al.
Physical Review Letters 131 021801 - 6 pages 2023.7
Publishing type：Research paper (scientific journal)
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Study of the muon decay-in-flight in the τ− → μ− #Eν(/)-#ERμ ντ Decay to measure the Michel parameter ξ′ Reviewed
D. Bodrov , P. Pakhlov, T. Matsuda et al.
Physical Review D 108 012003 - 16 pages 2023.7
Publishing type：Research paper (scientific journal)
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Measurement of differential distributions of B → D∗ℓ#Eν(/)-#ERℓ and implications on | Vcb | Reviewed
M. T. Prim , F. Bernlochner, T. Matsuda et al.
Physical Review D 108 012002 - 21 pages 2023.7
Publishing type：Research paper (scientific journal)
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Study of the muon decay-in-flight in the τ− → μ− ¯ νμ ντ decay to measure the Michel parameter ξ′ Reviewed
107 112009 - 10 pages 2023.6
Publishing type：Research paper (scientific journal)
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Search for the Lepton Flavor Violating Decays B+ → K+τ±ℓ∓ (ℓ = e , μ) at Belle Reviewed
S. Watanuki , G. de Marino, T. Matsuda et al.
Physical Review Letters 130 ( 26 ) 261802 - 7 pages 2023.6
Publishing type：Research paper (scientific journal) Publisher：Physical Review Letters
We present a search for the lepton flavor violating decays B+→K+τ±ℓ∓, with ℓ=(e,μ), using the full data sample of 772×106 BB¯ pairs recorded by the Belle detector at the KEKB asymmetric-energy e+e- collider. We use events in which one B meson is fully reconstructed in a hadronic decay mode. We find no evidence for B±→K±τℓ decays and set upper limits on their branching fractions at the 90% confidence level in the (1-3)×10-5 range. The obtained limits are the world's best results.
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Study of the muon decay-in-flight in the τ− → μ− ¯ νμ ντ decay to measure the Michel parameter ξ′ Reviewed
107 112011 - 14 pages 2023.6
Publishing type：Research paper (scientific journal)
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Meier F., Vossen A., Adachi I., Matsuda T., et al.
Physical Review D 107 ( 9 ) 092003 - 23 pages 2023.5
Publishing type：Research paper (scientific journal) Publisher：Physical Review D
We report measurements of the ratios of branching fractions for B→D¯(∗)πℓ+νℓ and B→D¯(∗)π+π-ℓ+νℓ relative to B→D¯∗ℓ+νℓ decays with ℓ=e, μ. These results are obtained from a data sample that contains 772×106BB¯ pairs collected near the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric energy e+e- collider. Fully reconstructing both B mesons in the event, we obtain B(B0→D¯0π-ℓ+νℓ)B(B0→D∗-ℓ+νℓ)=(7.23±0.36±0.14)%, B(B+→D-π+ℓ+νℓ)B(B+→D¯∗0ℓ+νℓ)=(6.78±0.24±0.18)%, B(B0→D¯∗0π-ℓ+νℓ)B(B0→D∗-ℓ+νℓ)=(11.10±0.48±0.23)%, B(B+→D∗-π+ℓ+νℓ)B(B+→D¯∗0ℓ+νℓ)=(9.50±0.33±0.34)%, B(B0→D-π+π-ℓ+νℓ)B(B0→D∗-ℓ+νℓ)=(2.91±0.37±0.26)%, B(B+→D¯0π+π-ℓ+νℓ)B(B+→D¯∗0ℓ+νℓ)=(3.10±0.26±0.22)%, B(B0→D∗-π+π-ℓ+νℓ)B(B0→D∗-ℓ+νℓ)=(0.99±0.43±0.20)%, B(B+→D¯∗0π+π-ℓ+νℓ)B(B+→D¯∗0ℓ+νℓ)=(1.25±0.27±0.15)%, where the uncertainties are statistical and systematic, respectively. These are the most precise measurements of these branching fraction ratios to date. The invariant mass spectra of the Dπ, D∗π, and Dππ systems are studied, and the branching fraction products B(B0→D2∗-ℓ+νℓ)×B(D2∗-→D¯0π-)=(0.157±0.015±0.005)%, B(B+→D¯0∗0ℓ+νℓ)×B(D¯0∗0→D-π+)=(0.054±0.022±0.005)%, B(B+→D¯2∗0ℓ+νℓ)×B(D¯2∗0→D-π+)=(0.163±0.011±0.008)%, B(B0→D1-ℓ+νℓ)×B(D1-→D¯∗0π-)=(0.306±0.050±0.029)%, B(B0→D1′-ℓ+νℓ)×B(D1′-→D¯∗0π-)=(0.206±0.068±0.025)%, B(B0→D2∗-ℓ+νℓ)×B(D2∗-→D¯∗0π-)=(0.051±0.040±0.010)%, B(B+→D¯10ℓ+νℓ)×B(D¯10→D∗-π+)=(0.249±0.023±0.015)%, B(B+→D¯1′0ℓ+νℓ)×B(D¯1′0→D∗-π+)=(0.138±0.036±0.009)%, B(B+→D¯2∗0ℓ+νℓ)×B(D¯2∗0→D∗-π+)=(0.137±0.026±0.009)%, B(B0→D1-ℓ+νℓ)×B(D1-→D-π+π-)=(0.102±0.013±0.009)%, B(B+→D¯10ℓ+νℓ)×B(D¯10→D¯0π+π-)=(0.105±0.011±0.009)%, are extracted. This is the first observation of the decays B→D¯1ℓ+νℓ with D1→Dπ+π-.
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Search for Lepton-Flavor-Violating τ Decays to a Lepton and an Invisible Boson at Belle II Reviewed
Adachi I., Adamczyk K.,Matsuda T., et al.
Physical Review Letters 130 ( 18 ) 18180 - 7pages 2023.5
Publishing type：Research paper (scientific journal) Publisher：Physical Review Letters
We search for lepton-flavor-violating τ-→e-α and τ-→μ-α decays, where α is an invisible spin-0 boson. The search uses electron-positron collisions at 10.58 GeV center-of-mass energy with an integrated luminosity of 62.8 fb-1, produced by the SuperKEKB collider and collected with the Belle II detector. We search for an excess in the lepton-energy spectrum of the known τ-→e-ν¯eντ and τ-→μ-ν¯μντ decays. We report 95% confidence-level upper limits on the branching-fraction ratio B(τ-→e-α)/B(τ-→e-ν¯eντ) in the range (1.1-9.7)×10-3 and on B(τ-→μ-α)/B(τ-→μ-ν¯μντ) in the range (0.7-12.2)×10-3 for α masses between 0 and 1.6 GeV/c2. These results provide the most stringent bounds on invisible boson production from τ decays.
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Study of e+e- → Σ0#EΣ(/)-0 and Σ+#EΣ(/)-#ER- by initial state radiation method at Belle Reviewed
Gong G., Li L.K., Zhang Y., Matsuda T., et al.
Physical Review D 107 ( 7 ) 072008 - 14 pages 2023.4
Publishing type：Research paper (scientific journal) Publisher：Physical Review D
The processes e+e-→ς0ς¯0 and e+e-→ς+ς¯- are studied using initial-state-radiation events in a sample of 980 fb-1 collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. The cross sections from the mass threshold to 3 GeV/c2 and the effective form factors of ς0 and ς+ are measured. In the charmonium region, we observe the decays J/ψ→ς0ς¯0 and J/ψ→ς+ς¯- and determine the respective branching fractions.
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Ma Y., Yelton J., Tanida K.,Matsuda T., et al.
Physical Review Letters 130 ( 15 ) 151903 - 6 pages 2023.4
Publishing type：Research paper (scientific journal) Publisher：Physical Review Letters
Using the data sample of 980 fb-1 collected with the Belle detector operating at the KEKB asymmetric-energy e+e- collider, we present the results of an investigation of the Λπ+ and Λπ- invariant mass distributions looking for substructure in the decay Λc+→Λπ+π+π-. We find a significant signal in each mass distribution. When interpreted as resonances, we find for the Λπ+ (Λπ-) combination a mass of 1434.3±0.6(stat)±0.9(syst) MeV/c2 [1438.5±0.9(stat)±2.5(syst) MeV/c2], an intrinsic width of 11.5±2.8(stat)±5.3(syst) MeV/c2 [33.0±7.5(stat)±23.6(syst) MeV/c2] with a significance of 7.5σ (6.2σ). As these two signals are very close to the K̄N threshold, we also investigate the possibility of a K̄N cusp, and find that we cannot discriminate between these two interpretations due to the limited size of the data sample.
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Two-particle angular correlations in e+e− collisions to hadronic final states in two reference coordinates at Belle Reviewed
Y.-C. Chen, Y.-J. Lee, T. Matsuda et al.
Journal of High Energy Physics 2023 171 2023.3
Language：English Publishing type：Research paper (scientific journal)
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Double J/ψ production in pion-nucleon scattering at COMPASS Reviewed
Alexeev G.D., Alexeev M.G., Amoroso A., Andrieux V., Anosov V., Augsten K., Augustyniak W., Azevedo C.D.R., Badełek B., Ball M., Barth J., Beck R., Bedfer Y., Bernhard J., Bodlak M., Bradamante F., Bressan A., Burtsev V.E., Chang W.C., Chatterjee C., Chiosso M., Chumakov A.G., Chung S.U., Cicuttin A., Correia P.M.M., Crespo M.L., D'Ago D., Dalla Torre S., Dasgupta S.S., Dasgupta S., Denisenko I., Denisov O.Y., Donskov S.V., Doshita N., Dreisbach C., Dünnweber W., Dusaev R.R., Ecker D., Efremov A., Eremeev D., Eversheim P.D., Faccioli P., Faessler M., Finger M., Fischer H., Flöthner K.J., Florian W., Franco C., Friedrich J.M., Frolov V., Garcia Ordòñez L.G., Gautheron F., Gavrichtchouk O.P., Gerassimov S., Giarra J., Giordano D., Gorzellik M., Grasso A., Gridin A., Groote S., Grosse Perdekamp M., Grube B., Grüner M., Guskov A., von Harrach D., Hoffmann M., Horikawa N., d'Hose N., Hsieh C.Y., Huber S., Ishimoto S., Ivanov A., Iwata T., Jandek M., Jary V., Joosten R., Kabuß E., Kaspar F., Kerbizi A., Ketzer B., Khatun A., Khaustov G.V., Khokhlov Y.A., Klein F., Koivuniemi J.H., Kolosov V.N., Kondo Horikawa K., Konorov I., Konstantinov V.F., Korzenev A.M., Koshkarev S., Kotzinian A.M., Kouznetsov O.M., Koval A., Kral Z., Krinner F., Kunne F., Kurek K., Kurjata R.P., Kveton A.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 838 137702 2023.3
Language：English Publishing type：Research paper (scientific journal) Publisher：Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
We present the study of the production of double J/ψ mesons using COMPASS data collected with a 190 GeV/c π− beam scattering off NH3, Al and W targets. Kinematic distributions of the collected double J/ψ events are analysed, and the double J/ψ production cross section is estimated for each of the COMPASS targets. The NH3 results are compared to predictions from single- and double-parton scattering models as well as the pion intrinsic charm and the tetraquark exotic resonance hypotheses. It is demonstrated that the single parton scattering production mechanism gives the dominant contribution that is sufficient to describe the data. An upper limit on the double intrinsic charm content of the pion is evaluated. No significant signatures that could be associated with exotic tetraquarks are found in the double J/ψ mass spectrum.
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Search for X(3872) → π+π−π0 at Belle Reviewed
J. H. Yin, E. Won, T. Matsuda et al.
Physical Review D 107 ( 5 ) 052004 2023.3
Language：English Publishing type：Research paper (scientific journal)
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Angular analysis of the low K+K- invariant mass enhancement in B+ →K+K-π+ decays Reviewed
Hsu C.L., Sevior M.E., Adachi I., Aihara H., Al Said S., Asner D.M., Atmacan H., Aulchenko V., Aushev T., Ayad R., Babu V., Bahinipati S., Bauer M., Behera P., Belous K., Bennett J., Bessner M., Bhardwaj V., Bhuyan B., Bilka T., Biswal J., Bloomfield T., Bobrov A., Bozek A., Bračko M., Branchini P., Browder T.E., Budano A., Campajola M., Červenkov D., Chang M.C., Chekelian V., Chen A., Cheon B.G., Chilikin K., Cho H.E., Cho K., Cho S.J., Choi S.K., Choi Y., Choudhury S., Cinabro D., Cunliffe S., Das S., Dash N., De Nardo G., De Pietro G., Dhamija R., Di Capua F., Dingfelder J., DoleŽal Z., Dong T.V., Dossett D., Dubey S., Epifanov D., Ferber T., Ferlewicz D., Fulsom B.G., Garg R., Gaur V., Gabyshev N., Garmash A., Giri A., Goldenzweig P., Graziani E., Gu T., Gudkova K., Hadjivasiliou C., Halder S., Hara T., Hartbrich O., Hayasaka K., Hayashii H., Hou W.S., Inami K., Ishikawa A., Itoh R., Iwasaki M., Jacobs W.W., Jang E.J., Jia S., Jin Y., Joo K.K., Kaliyar A.B., Kang K.H., Kiesling C., Kim C.H., Kim D.Y., Kim Y.K., Kimmel T.D., Kodyš P., Konno T., Korobov A., Korpar S., Kovalenko E., KriŽan P., Krokovny P., Kuhr T., Kulasiri R., Kumara K.
Physical Review D 107 ( 3 ) 2023.2
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review D
We study the decay B+→K+K-π+ and investigate the angular distribution of K+K- pairs with invariant mass below 1.1 GeV/c2. This region exhibits both a strong enhancement in signal and very large direct CP violation. We construct a coherent sum model for the angular distribution of the S- and P-wave, and report the ratio of their amplitudes, the relative phase and the forward-backward asymmetry. We also report absolute differential branching fractions and direct CP asymmetry for the decay in bins of MK+K- and the differential branching fractions in bins of MK+π-. The results are based on a data sample that contains 772×106 BB¯ pairs collected at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. The result favors the presence of S- and D-waves in low MK+K- region to the detriment of a P-wave.
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Choudhury S., Sandilya S., Matsuda T., et al.
Physical Review D 107 ( 3 ) L031102 - 6 pages 2023.2
Publishing type：Research paper (scientific journal) Publisher：Physical Review D
We measure the ratio of branching fractions for the ϒ(4S) decays to B+B- and B0B¯0 using B+→J/ψ(ℓℓ)K+ and B0→J/ψ(ℓℓ)K0 samples, where J/ψ(ℓℓ) stands for J/ψ→ℓ+ℓ- (ℓ=e or μ), with 711 fb-1 of data collected at the ϒ(4S) resonance with the Belle detector. We find the decay rate ratio of ϒ(4S)→B+B- over ϒ(4S)→B0B¯0 to be 1.065±0.012±0.019±0.047, which is the most precise measurement to date. The first and second uncertainties are statistical and systematic, respectively, and the third uncertainty is due to the assumption of isospin symmetry in B→J/ψ(ℓℓ)K.
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Wang D., Yelton J., Adachi I., Ahn J.K., Aihara H., Asner D.M., Atmacan H., Ayad R., Babu V., Banerjee S., Bauer M., Behera P., Belous K., Bennett J., Bessner M., Bilka T., Biswas D., Bodrov D., Borah J., Bozek A., Bračko M., Branchini P., Browder T.E., Budano A., Campajola M., Červenkov D., Chang M.C., Chen A., Cheon B.G., Cho H.E., Cho K., Cho S.J., Choi S.K., Choi Y., Choudhury S., Cinabro D., Das S., De Nardo G., De Pietro G., Dhamija R., Di Capua F., DoleŽal Z., Dong T.V., Dossett D., Epifanov D., Ferber T., Ferlewicz D., Fulsom B.G., Garg R., Gaur V., Giri A., Goldenzweig P., Graziani E., Gu T., Gudkova K., Hadjivasiliou C., Han X., Hayasaka K., Hayashii H., Hedges M.T., Hsu C.L., Inami K., Ipsita N., Ishikawa A., Itoh R., Iwasaki M., Jacobs W.W., Jang E.J., Jia S., Jin Y., Kaliyar A.B., Kang K.H., Kawasaki T., Kiesling C., Kim C.H., Kim D.Y., Kim K.H., Kim Y.K., Kinoshita K., Kodyš P., Korobov A., Korpar S., Kovalenko E., KriŽan P., Krokovny P., Kumar M., Kumar R., Kumara K., Kwon Y.J., Lam T., Lange J.S., Lee S.C., Levit D., Lewis P., Li L.K., Li Y., Li Y.B., Li Gioi L., Libby J., Lieret K.
Physical Review D 107 ( 3 ) 032008 2023.2
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review D
Using the entire data sample of 980 fb-1 collected at or near the ϒ(4S) resonance with the Belle detector operating at the KEKB asymmetric-energy e+e- collider, we report the measurement of the mass, width, and the branching ratios of the Λc(2625)+ charmed baryon. The mass difference between Λc(2625)+ and Λc+ is measured to be M(Λc(2625)+)-M(Λc+)=341.518±0.006±0.049 MeV/c2. The upper limit on the width is measured to be Γ(Λc(2625)+)<0.52 MeV/c2 at 90% confidence level. Based on a full Dalitz plot fit, branching ratios with respect to the mode Λc(2625)+→Λc+π+π- are measured to be B(Λc(2625)+→ςc0π+)B(Λc(2625)+→Λc+π+π-)=(5.19±0.23±0.40)% and B(Λc(2625)+→ςc++π-)B(Λc(2625)+→Λc+π+π-)=(5.13±0.26±0.32)%, where the first and second uncertainties are statistical and systematic, respectively. These measurements can be used to further constrain the parameters of the underlying theoretical models.
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Search for rare decays B+ → Ds (∗)+ η, Ds (∗)+ K ¯ 0, D+η, and D+K0 Reviewed
Kumar M., Bhardwaj V., Lalwani K., Adachi I., Aihara H., Asner D.M., Aushev T., Babu V., Behera P., Belous K., Bennett J., Bessner M., Bhuyan B., Bilka T., Bobrov A., Bodrov D., Bonvicini G., Borah J., Bozek A., Bračko M., Branchini P., Browder T.E., Budano A., Campajola M., Červenkov D., Chang M.C., Chang P., Cheon B.G., Chilikin K., Cho H.E., Cho K., Cho S.J., Choi S.K., Choi Y., Choudhury S., Cinabro D., Das S., Dash N., De Pietro G., Dhamija R., Di Capua F., Dingfelder J., DoleŽal Z., Dong T.V., Dossett D., Epifanov D., Ferlewicz D., Fulsom B.G., Garg R., Gaur V., Garmash A., Giri A., Goldenzweig P., Graziani E., Gu T., Guan Y., Gudkova K., Hadjivasiliou C., Hara T., Hayasaka K., Hayashii H., Hou W.S., Hsu C.L., Iijima T., Inami K., Ipsita N., Ishikawa A., Itoh R., Iwasaki M., Jacobs W.W., Jang E.J., Ji Q.P., Jia S., Jin Y., Joo K.K., Kalita D., Kang K.H., Kiesling C., Kim C.H., Kim D.Y., Kim K.H., Kim Y.K., Kinoshita K., Kodyš P., Korobov A., Korpar S., Kovalenko E., KriŽan P., Krokovny P., Kumar R., Kumara K., Kwon Y.J., Lam T., Lange J.S., Laurenza M., Lee S.C., Li C.H., Li J., Li L.K., Li Y.
Physical Review D 107 ( 3 ) L031101 2023.2
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review D
We present a study of rare decay modes B+→Ds+h0, B+→Ds∗+h0, and B+→D+h0, where h0 denotes the neutral meson η or K0, using a data sample of (772±10)×106 BB¯ events produced at the ϒ(4S) resonance. The data were collected by the Belle detector operating at the asymmetric-energy KEKB collider. We find no evidence for these decays, so we set upper limits at the 90% confidence level on the branching fractions of B+→Ds+h0, Ds∗+h0, and D+h0 decay modes. Along with these rare decay modes, we report improved measurements of the color-suppressed decay branching fractions B(B¯0→D0η)=(26.6±1.2±2.1)×10-5 and B(B¯0→D0K̄0)=(5.6±0.5±0.2)×10-5. The first and second quoted uncertainties are statistical and systematic, respectively.
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Measurement of branching fractions of Λc+ →pKS0KS0 and Λc+ →pKS0η at Belle Reviewed
Li L.K., Kinoshita K., Adachi I., Ahn J.K., Aihara H., Al Said S., Asner D.M., Aushev T., Ayad R., Babu V., Bahinipati S., Banerjee S., Behera P., Belous K., Bennett J., Bessner M., Bhuyan B., Bilka T., Biswas D., Bobrov A., Bodrov D., Bonvicini G., Borah J., Bozek A., Bračko M., Branchini P., Browder T.E., Budano A., Campajola M., Červenkov D., Chang M.C., Chen A., Cheon B.G., Chilikin K., Cho K., Cho S.J., Choi Y., Choudhury S., Cinabro D., Das S., De Nardo G., De Pietro G., Dhamija R., Di Capua F., Dingfelder J., DoleŽal Z., Dong T.V., Epifanov D., Ferber T., Ferlewicz D., Fulsom B.G., Garg R., Gaur V., Garmash A., Giri A., Goldenzweig P., Golob B., Gong G., Graziani E., Guan Y., Gudkova K., Hadjivasiliou C., Halder S., Han X., Hayasaka K., Hayashii H., Hedges M.T., Hou W.S., Hsu C.L., Inami K., Ipsita N., Ishikawa A., Itoh R., Iwasaki M., Jacobs W.W., Jang E.J., Ji Q.P., Jia S., Jin Y., Joo K.K., Kang K.H., Kawasaki T., Kim C.H., Kim D.Y., Kim K.H., Kim Y.K., Kodyš P., Korobov A., Korpar S., Kovalenko E., KriŽan P., Krokovny P., Kuhr T., Kumar M., Kumar R., Kumara K., Kwon Y.J., Lam T., Lange J.S., Lee S.C.
Physical Review D 107 ( 3 ) 2023.2
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review D
We present a study of a singly Cabibbo-suppressed decay Λc+→pKS0KS0 and a Cabibbo-favored decay Λc+→pKS0η based on 980 fb-1 of data collected by the Belle detector, operating at the KEKB energy-asymmetric e+e- collider. We measure their branching fractions relative to Λc+→pKS0: B(Λc+→pKS0KS0)/B(Λc+→pKS0)=(1.48±0.08±0.04)×10-2 and B(Λc+→pKS0η)/B(Λc+→pKS0)=(2.73±0.06±0.13)×10-1. Combining with the world average B(Λc+→pKS0), we have the absolute branching fractions, B(Λc+→pKS0KS0)=(2.35±0.12±0.07±0.12)×10-4 and B(Λc+→pKS0η)=(4.35±0.10±0.20±0.22)×10-3. The first and second uncertainties are statistical and systematic, respectively, while the third ones arise from the uncertainty on B(Λc+→pKS0). The mode Λc+→pKS0KS0 is observed for the first time and has a statistical significance of >10σ. The branching fraction of Λc+→pKS0η has been measured with a threefold improvement in precision over previous results and is found to be consistent with the world average.
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Li S.X., Shen C.P., Adachi I., Ahn J.K., Aihara H., Asner D.M., Atmacan H., Aushev T., Ayad R., Babu V., Bahinipati S., Banerjee S., Behera P., Belous K., Bennett J., Bessner M., Bilka T., Biswas D., Bobrov A., Bodrov D., Borah J., Bračko M., Branchini P., Browder T.E., Budano A., Campajola M., Červenkov D., Chang M.C., Chang P., Chekelian V., Chen A., Cheon B.G., Chilikin K., Cho H.E., Cho K., Cho S.J., Choi S.K., Choi Y., Choudhury S., Cinabro D., De Pietro G., Dhamija R., Di Capua F., Dong T.V., Ferber T., Frey A., Fulsom B.G., Gaur V., Giri A., Goldenzweig P., Graziani E., Gu T., Gudkova K., Hadjivasiliou C., Hayasaka K., Hayashii H., Hsu C.L., Inami K., Ipsita N., Ishikawa A., Itoh R., Jacobs W.W., Jin Y., Joo K.K., Kalita D., Kaliyar A.B., Kiesling C., Kim C.H., Kim D.Y., Kim K.H., Kim Y.K., Kodyš P., Konno T., Korobov A., Korpar S., Kovalenko E., Krokovny P., Kuhr T., Kumar M., Kumar R., Kumara K., Kuzmin A., Kwon Y.J., Lam T., Lange J.S., Lee S.C., Li L.K., Li Y., Li Y.B., Li Gioi L., Libby J., Lieret K., Masuda M., Matsuda T., Maurya S.K., Meier F., Merola M., Metzner F., Mizuk R., Mussa R.
Physical Review D 107 ( 3 ) 032003 2023.2
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review D
We report a study of Λc+→ς+π0, Λc+→ς+η, and Λc+→ς+η′ using the data sample corresponding to an integrated luminosity of 980 fb-1 collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. The branching fractions relative to Λc+→ς+π0 are measured as BΛc+→ς+η/BΛc+→ς+π0=0.25±0.03±0.01 and BΛc+→ς+η′/BΛc+→ς+π0=0.33±0.06±0.02. Using BΛc+→ς+π0=(1.25±0.10)%, we obtain BΛc+→ς+η=(3.14±0.35±0.17±0.25)×10-3 and BΛc+→ς+η′=(4.16±0.75±0.25±0.33)×10-3. Here the uncertainties are statistical, systematic, and from BΛc+→ς+π0, respectively. The ratio of the branching fraction of Λc+→ς+η′ with respect to that of Λc+→ς+η is measured to be BΛc+→ς+η′/BΛc+→ς+η=1.34±0.28±0.08. We update the asymmetry parameter of Λc+→ς+π0, ας+π0=-0.48±0.02±0.02, with a considerably improved precision. The asymmetry parameters of Λc+→ς+η and Λc+→ς+η′ are measured to be ας+η=-0.99±0.03±0.05 and ας+η′=-0.46±0.06±0.03 for the first time.
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First search for the weak radiative decays Λc+ → Σ+γ and Ξc0 → Ξ0γ Reviewed
Li Y., Shen C.P., Adachi I., Aihara H., Asner D.M., Aulchenko V., Aushev T., Babu V., Behera P., Belous K., Bennett J., Bessner M., Bhardwaj V., Bhuyan B., Bilka T., Bobrov A., Bodrov D., Bonvicini G., Borah J., Bozek A., Bračko M., Branchini P., Browder T.E., Budano A., Campajola M., Červenkov D., Chang M.C., Chang P., Cheon B.G., Chilikin K., Cho H.E., Cho K., Cho S.J., Choi S.K., Choi Y., Choudhury S., Cinabro D., Das S., Dash N., De Pietro G., Dhamija R., Di Capua F., Dingfelder J., DoleŽal Z., Dong T.V., Dossett D., Epifanov D., Ferlewicz D., Fulsom B.G., Garg R., Gaur V., Garmash A., Giri A., Goldenzweig P., Graziani E., Gu T., Gudkova K., Hadjivasiliou C., Hayasaka K., Hayashii H., Hou W.S., Hsu C.L., Iijima T., Inami K., Ipsita N., Ishikawa A., Itoh R., Iwasaki M., Jacobs W.W., Jang E.J., Ji Q.P., Jia S., Jin Y., Joo K.K., Kang K.H., Kiesling C., Kim C.H., Kim D.Y., Kim K.H., Kim Y.K., Kinoshita K., Kodyš P., Korobov A., Korpar S., Kovalenko E., KriŽan P., Krokovny P., Kumar M., Kumar R., Kumara K., Kwon Y.J., Lam T., Lange J.S., Laurenza M., Lee S.C., Li C.H., Li J., Li L.K., Li Y.B., Li Gioi L.
Physical Review D 107 ( 3 ) 032001 2023.2
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review D
We present the first search for the weak radiative decays Λc+→ς+γ and Ξc0→Ξ0γ using a data sample of 980 fb-1 collected by the Belle detector operating at the KEKB asymmetric-energy e+e- collider. There are no evident Λc+→ς+γ or Ξc0→Ξ0γ signals. Taking the decays Λc+→pK-π+ and Ξc0→Ξ-π+ as normalization channels, the upper limits at 90% credibility level on the ratios of branching fractions B(Λc+→ς+γ)/B(Λc+→pK-π+)<4.0×10-3 and B(Ξc0→Ξ0γ)/B(Ξc0→Ξ-π+)<1.2×10-2 are determined. We obtain the upper limits at 90% credibility level on the absolute branching fractions B(Λc+→ς+γ)<2.6×10-4 and B(Ξc0→Ξ0γ)<1.8×10-4.
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Measurement of two-photon decay width of χc2(1P) in γγ → χc2(1P) → J/ψγ at Belle Reviewed
Seino Y., Hayasaka K., Uehara S., Adachi I., Aihara H., Al Said S., Asner D.M., Atmacan H., Aushev T., Ayad R., Babu V., Bahinipati S., Behera P., Belous K., Bennett J., Bessner M., Bhardwaj V., Bhuyan B., Bilka T., Bodrov D., Bonvicini G., Borah J., Bozek A., Bračko M., Branchini P., Browder T.E., Budano A., Campajola M., Červenkov D., Chang M.C., Chang P., Chekelian V., Chen A., Cheon B.G., Chilikin K., Cho H.E., Cho K., Cho S.J., Choi S.K., Choi Y., Choudhury S., Cinabro D., Das S., De Pietro G., Dhamija R., Di Capua F., Dingfelder J., Doležal Z., Dong T.V., Epifanov D., Ferber T., Ferlewicz D., Fulsom B.G., Garg R., Gaur V., Gabyshev N., Garmash A., Giri A., Goldenzweig P., Graziani E., Hadjivasiliou C., Hayashii H., Hou W.S., Hsu C.L., Inami K., Ipsita N., Ishikawa A., Itoh R., Iwasaki M., Jacobs W.W., Jang E.J., Jia S., Jin Y., Joo K.K., Kakuno H., Kang K.H., Karyan G., Kawasaki T., Kiesling C., Kim C.H., Kim D.Y., Kim K.H., Kim Y.K., Kodyš P., Konno T., Korobov A., Korpar S., Kovalenko E., Križan P., Krokovny P., Kumar M., Kumar R., Kumara K., Lam T., Lange J.S., Lee S.C., Li C.H., Li J., Li L.K., Li Y.
Journal of High Energy Physics 2023 ( 1 ) 160 2023.1
Language：English Publishing type：Research paper (scientific journal) Publisher：Journal of High Energy Physics
We report the measurement of the two-photon decay width of χc2(1P) in two-photon processes at the Belle experiment. We analyze the process γγ → χc2(1P) → J/ψγ, J/ψ → ℓ+ℓ− (ℓ = e or μ) using a data sample of 971 fb−1 collected with the Belle detector at the KEKB e+e− collider. In this analysis, the product of the two-photon decay width of χc2(1P) and the branching fraction is determined to be Γγγ(χc2(1P))B(χc2(1P)→J/ψγ)B(J/ψ→ℓ+ℓ−)=14.8±0.3(stat.)±0.7(syst.) eV, which corresponds to Γγγ(χc2(1P)) = 653 ± 13(stat.) ± 31(syst.) ± 17(B.R.) eV, where the third uncertainty is from B(χc2(1P) → J/ψγ) and B(J/ψ → ℓ+ℓ−). [Figure not available: see fulltext.].
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Measurement of two-photon decay width of χc2(1P) in γγ → χc2(1P) → J/ψγ at Belle Reviewed
Y. Seino, K. Hayasaka, T. Matsuda et al.
Journal of High Energy Physics 2023 160 2023.1
Language：English Publishing type：Research paper (scientific journal)
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Study of e+e- →ηφ via initial state radiation at Belle Reviewed
Zhu W.J., Gao B.S., Matsuda T., et al.
Physical Review D 107 ( 1 ) 012006 - 10 pages 2023.1
Publishing type：Research paper (scientific journal) Publisher：Physical Review D
Using 980 fb-1 of data collected on and around the (nS) (n=1, 2, 3, 4, 5) resonances with the Belle detector at the KEKB collider, we measure the cross section of e+e-→ηφ from threshold to 3.95 GeV via initial state radiation. There are clear φ(1680) and J/ψ signals but no significant φ(2170) signal in the ηφ final state. The branching fraction B[J/ψ→ηφ] is measured to be (7.2±0.8±0.5)×10-4. The resonant parameters of φ(1680) are determined to be mφ(1680)=(1696±8±10) MeV/c2 (statistical and systematic errors, respectively), Γφ(1680)=(175±13±16) MeV and, depending on the possible presence of predominantly constructive or destructive interference between φ(1680) and continuum production, Γφ(1680)e+e-·B[φ(1680)→ηφ] and B[φ(1680)→ηφ] are determined to be (75±10±11) eV and (25±12±2)% or (207±16±20) eV and (23±10±2)%, respectively. The upper limit for Γφ(2170)e+e-·B[φ(2170)→ηφ] is determined to be either 0.17 or 18.6 eV at the 90% confidence level.
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Krohn J.F., Ferlewicz D., Urquijo P., Adachi I., Aihara H., Al Said S., Asner D.M., Atmacan H., Aushev T., Ayad R., Babu V., Bahinipati S., Behera P., Belous K., Bessner M., Bhardwaj V., Bhuyan B., Bilka T., Bodrov D., Bonvicini G., Borah J., Bozek A., Bračko M., Branchini P., Browder T.E., Budano A., Campajola M., Červenkov D., Chang M.C., Chang P., Chekelian V., Chen A., Cheon B.G., Chilikin K., Cho H.E., Cho K., Cho S.J., Choi Y., Choudhury S., Cinabro D., Cunliffe S., Das S., Dash N., De Nardo G., De Pietro G., Dhamija R., Di Capua F., DoleŽal Z., Dong T.V., Epifanov D., Ferber T., Fulsom B.G., Garg R., Gaur V., Gabyshev N., Goldenzweig P., Golob B., Graziani E., Gu T., Gudkova K., Hadjivasiliou C., Hara T., Hayasaka K., Hayashii H., Hou W.S., Hsu C.L., Inami K., Ishikawa A., Iwasaki M., Iwasaki Y., Jacobs W.W., Jang E.J., Jia S., Jin Y., Joo K.K., Kahn J., Kaliyar A.B., Kang K.H., Kawasaki T., Kichimi H., Kiesling C., Kim C.H., Kim D.Y., Kim Y.K., Kinoshita K., Kodyš P., Konno T., Korobov A., Korpar S., Kovalenko E., KriŽan P., Krokovny P., Kumar M., Kumar R., Kumara K., Kwon Y.J., Lam T., Laurenza M., Lee S.C., Li J.
Physical Review D 107 ( 1 ) 012003 2023.1
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review D
Using (771.6±10.6)×106 BB¯ meson pairs recorded by the Belle experiment at the KEKB e+e- collider, we report the branching fractions B(B¯0→D∗+π-)=(2.62±0.02±0.09)×10-3 and B(B¯0→D∗+K-)=(2.22±0.06±0.08)×10-4; the quoted uncertainties are statistical and systematic, respectively. A measurement of the ratio of these branching fractions is also presented, RK/π=B(B¯→D∗+K-)/B(B¯→D∗+π-)=(8.41±0.24±0.13)×10-2, where systematic uncertainties due to the D∗+ meson reconstruction cancel out. Furthermore, we report a new QCD factorization test based on the measured ratios for B¯→D∗+h- and B¯→D∗+ℓ-ν decays at squared momentum transfer values equivalent to the mass of the h=π or K hadron. The parameters |a1(h)| are measured to be |a1(π)|=0.884±0.004±0.003±0.016 and |a1(K)|=0.913±0.019±0.008±0.013, where the last uncertainties account for all external inputs. These values are approximately 15% lower than those expected from theoretical predictions. Subsequently, flavor SU(3) symmetry is tested by measuring the ratios for pions and kaons, |a1(K)|2/|a1(π)|2=1.066±0.042±0.018±0.023, as well as for different particle species. The ratio is consistent with unity and therefore no evidence for SU(3) symmetry breaking effects is found at the 5% precision level.
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Evidence of a New Excited Charmed Baryon Decaying to Σc(2455)0,++π± Reviewed
Li Y.B., Shen C.P., Adachi I., Aihara H., Asner D.M., Atmacan H., Aushev T., Ayad R., Babu V., Bahinipati S., Behera P., Belous K., Bennett J., Bessner M., Bhardwaj V., Bhuyan B., Bilka T., Bodrov D., Borah J., Bozek A., Bračko M., Branchini P., Browder T.E., Budano A., Campajola M., Červenkov D., Chang M.C., Chang P., Cheon B.G., Chilikin K., Cho H.E., Cho K., Cho S.J., Choi S.K., Choi Y., Choudhury S., Cinabro D., Das S., De Pietro G., Dhamija R., Di Capua F., Dingfelder J., DoleŽal Z., Dong T.V., Dossett D., Epifanov D., Fulsom B.G., Garg R., Gaur V., Garmash A., Giri A., Goldenzweig P., Graziani E., Gu T., Guan Y., Gudkova K., Hadjivasiliou C., Hayasaka K., Hayashii H., Hou W.S., Hsu C.L., Iijima T., Inami K., Ipsita N., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Jacobs W.W., Jang E.J., Ji Q.P., Jia S., Jin Y., Joo K.K., Karyan G., Kawasaki T., Kichimi H., Kiesling C., Kim C.H., Kim D.Y., Kim K.H., Kim Y.K., Kindo H., Kinoshita K., Kodyš P., Konno T., Korobov A., Korpar S., Kovalenko E., KriŽan P., Krokovny P., Kumar M., Kumar R., Kumara K., Kwon Y.J., Lam T., Lange J.S., Laurenza M., Lee S.C., Li C.H.
Physical Review Letters 130 ( 3 ) 031901 2023.1
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review Letters
We present the study of B¯0→ςc(2455)0,++π±p¯ decays based on 772×106 BB¯ events collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. The ςc(2455)0,++ candidates are reconstructed via their decay to Λc+π and Λc+ decays to pK-π+, pKS0, and Λπ+ final states. The corresponding branching fractions are measured to be B(B¯0→ςc(2455)0π+p¯)=(1.09±0.06±0.07)×10-4 and B(B¯0→ςc(2455)++π-p¯)=(1.84±0.11±0.12)×10-4, which are consistent with the world average values with improved precision. A new structure is found in the Mςc(2455)0,++π± spectrum with a significance of 4.2σ including systematic uncertainty. The structure is possibly an excited Λc+ and is tentatively named Λc(2910)+. Its mass and width are measured to be (2913.8±5.6±3.8) MeV/c2 and (51.8±20.0±18.8) MeV, respectively. The products of branching fractions for the Λc(2910)+ are measured to be B(B¯0→Λc(2910)+p¯)×B(Λc(2910)+→ςc(2455)0π+)=(9.5±3.6±1.6)×10-6 and B(B¯0→Λc(2910)+p¯)×B(Λc(2910)+→ςc(2455)++π-)=(1.24±0.35±0.10)×10-5. Here, the first and second uncertainties are statistical and systematic, respectively.
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Search for the decay B0s→η′K0S Reviewed
Pang T., Savinov V., Adachi I., Aihara H., Asner D.M., Atmacan H., Aulchenko V., Aushev T., Ayad R., Babu V., Behera P., Belous K., Bessner M., Bhardwaj V., Bhuyan B., Bilka T., Bobrov A., Bodrov D., Bonvicini G., Borah J., Bozek A., Bračko M., Branchini P., Browder T.E., Budano A., Campajola M., Červenkov D., Chang P., Chen A., Cheon B.G., Chilikin K., Cho H.E., Cho K., Cho S.J., Choi S.K., Choi Y., Choudhury S., Cinabro D., Cunliffe S., Das S., De Pietro G., Dhamija R., Di Capua F., Dingfelder J., DoleŽal Z., Dong T.V., Dossett D., Dubey S., Epifanov D., Ferber T., Frey A., Fulsom B.G., Garg R., Gaur V., Gabyshev N., Giri A., Goldenzweig P., Graziani E., Gu T., Gudkova K., Hadjivasiliou C., Halder S., Hayasaka K., Hayashii H., Hedges M.T., Hsu C.L., Iijima T., Inami K., Inguglia G., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Jacobs W.W., Jang E.J., Jia S., Jin Y., Joo K.K., Kahn J., Kalita D., Kaliyar A.B., Kang K.H., Karyan G., Kawasaki T., Kiesling C., Kim C.H., Kim D.Y., Kim K.H., Kim Y.K., Kinoshita K., Kodyš P., Konno T., Korobov A., Korpar S., Kovalenko E., KriŽan P., Kroeger R., Krokovny P., Kuhr T., Kumar R.
Physical Review D 106 ( 5 ) L051103 2022.9
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review D
We report the results of the first search for the decay B0s→η′K0S using 121.4 fb-1 of data collected at the Γ(5S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We observe no signal and set a 90% confidence-level upper limit of 8.16×10-6 on the B0s→η′KS0 branching fraction.
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Gebauer U., Beleño C., Frey A., Adachi I., Adamczyk K., Aihara H., Al Said S., Asner D.M., Atmacan H., Aushev T., Ayad R., Babu V., Bahinipati S., Behera P., Belous K., Bennett J., Bessner M., Bhardwaj V., Bhuyan B., Bilka T., Biswal J., Bobrov A., Bonvicini G., Bozek A., Bračko M., Browder T.E., Campajola M., Cao L., Červenkov D., Chang M.C., Chekelian V., Chen A., Cheon B.G., Chilikin K., Cho H.E., Cho K., Cho S.J., Choi S.K., Choi Y., Choudhury S., Cinabro D., Cunliffe S., Das S., Dash N., De Nardo G., Di Capua F., Dingfelder J., DoleŽal Z., Dong T.V., Eidelman S., Epifanov D., Ferber T., Ferlewicz D., Fulsom B.G., Garg R., Gaur V., Gabyshev N., Garmash A., Giri A., Goldenzweig P., Golob B., Gudkova K., Hadjivasiliou C., Halder S., Hara T., Hartbrich O., Hayasaka K., Hayashii H., Hedges M.T., Hou W.S., Hsu C.L., Iijima T., Inami K., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Jacobs W.W., Jia S., Jin Y., Joo C.W., Joo K.K., Kahn J., Kaliyar A.B., Kang K.H., Karyan G., Kawasaki T., Kichimi H., Kiesling C., Kim C.H., Kim D.Y., Kim S.H., Kim Y.K., Kinoshita K., Kodyš P., Konno T., Korobov A., Korpar S., Kovalenko E., KriŽan P.
Physical Review D 106 ( 3 ) 032013 2022.8
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review D
The branching fractions of the decays B+→ηâ "+νâ "and B+→η′â "+νâ "are measured, where â "is either an electron or a muon, using a data sample of 711 fb-1 containing 772×106BB¯ pairs collected at the I (4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e-collider. To reduce the dependence of the result on the form factor model, the measurement is performed over the entire q2 range. The resulting branching fractions are B(B+→ηâ "+νâ ")=(2.83±0.55(stat.)±0.34(syst.))×10-5 and B(B+→η′â "+νâ ")=(2.79±1.29(stat.)±0.30(syst.))×10-5.
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Search for the radiative penguin decays B0 → KS0 KS0 γ in the Belle experiment Reviewed
Jeon H.B., Kang K.H., Park H., Adachi I., Aihara H., Al Said S., Asner D.M., Atmacan H., Aushev T., Ayad R., Babu V., Bahinipati S., Behera P., Belous K., Bennett J., Bernlochner F., Bessner M., Bhardwaj V., Bhuyan B., Bilka T., Bobrov A., Bodrov D., Borah J., Bozek A., Bračko M., Branchini P., Browder T.E., Budano A., Campajola M., Červenkov D., Chang M.C., Chang P., Chen A., Cheon B.G., Chilikin K., Cho H.E., Cho K., Cho S.J., Choi S.K., Choi Y., Choudhury S., Cinabro D., Cunliffe S., Das S., Dash N., De Pietro G., Dhamija R., Di Capua F., Dingfelder J., DoleŽal Z., Dong T.V., Epifanov D., Ferber T., Ferlewicz D., Fulsom B.G., Garg R., Gaur V., Gabyshev N., Giri A., Goldenzweig P., Golob B., Graziani E., Gu T., Gudkova K., Hadjivasiliou C., Hara T., Hayasaka K., Hayashii H., Hedges M.T., Higuchi T., Hou W.S., Hsu C.L., Inami K., Inguglia G., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Jacobs W.W., Jang E.J., Jia S., Jin Y., Joo K.K., Kahn J., Kakuno H., Kaliyar A.B., Kawasaki T., Kiesling C., Kim C.H., Kim D.Y., Kim K.H., Kim K.T., Kim Y.K., Kinoshita K., Kodyš P., Konno T., Korobov A., Korpar S., Kovalenko E., KriŽan P.
Physical Review D 106 ( 1 ) 012006 2022.7
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review D
We report results from the first search for the rare penguin-dominated decay mode B0→KS0KS0γ, which can result from the production of tensor mesons f(1270) and f′(1525) in association with a photon. The search uses the full data sample of 772×106 BB¯ pairs collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. No statistically significant signals are observed in the KS0KS0 invariant mass range 1 GeV/c2<MKS0KS0<3 GeV/c2, and the following upper limits at the 90% confidence level are obtained: B(B0→KS0KS0γ)<5.8×10-7, B(B0→f2γ)×B(f2(1270)→KS0KS0)<3.1×10-7, and B(B0→f2′γ)×B(f2′(1525)→KS0KS0)<2.1×10-7. In addition, 90% confidence-level upper limits in the range of [0.7-2.9]×10-7 are also obtained on the B0→KS0KS0γ branching fraction in bins of MKS0KS0.
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Search for Z′ →μ+μ- in the Lμ-Lτ gauge-symmetric model at Belle Reviewed
Czank T., Jaegle I., Ishikawa A., Adachi I., Adamczyk K., Aihara H., Asner D.M., Aushev T., Ayad R., Babu V., Bahinipati S., Behera P., Bennett J., Bernlochner F., Bessner M., Bhardwaj V., Bhuyan B., Bilka T., Biswal J., Bobrov A., Bonvicini G., Bozek A., Bračko M., Browder T.E., Campajola M., Cao L., Červenkov D., Chang M.C., Chen A., Cheon B.G., Chilikin K., Cho H.E., Cho K., Choi Y., Choudhury S., Cinabro D., Das S., Dash N., De Nardo G., Dhamija R., Di Capua F., DoleŽal Z., Dong T.V., Eidelman S., Ferber T., Ferlewicz D., Fulsom B.G., Garg R., Gaur V., Garmash A., Giri A., Goldenzweig P., Golob B., Grzymkowska O., Guan Y., Gudkova K., Hadjivasiliou C., Hartbrich O., Hayasaka K., Hayashii H., Hedges M.T., Hernandez Villanueva M., Higuchi T., Hou W.S., Hsu C.L., Iijima T., Inami K., Inguglia G., Itoh R., Iwasaki M., Iwasaki Y., Jacobs W.W., Jang E.J., Jia S., Jin Y., Joo C.W., Joo K.K., Kang K.H., Karyan G., Kawasaki T., Kichimi H., Kiesling C., Kim B.H., Kim C.H., Kim D.Y., Kim K.H., Kim S.H., Kim Y.K., Kodyš P., Komarov I., Konno T., Korobov A., Korpar S., Kovalenko E., KriŽan P., Kroeger R., Krokovny P., Kuhr T., Kumar M., Kumara K.
Physical Review D 106 ( 1 ) 012003 2022.7
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review D
We search for a new gauge boson Z′ that couples only to heavy leptons and their corresponding neutrinos in the process e+e-→Z′(→μ+μ-)μ+μ-, using a 643 fb-1 data sample collected by the Belle experiment at or near the ϒ(1S,2S,3S,4S,5S) resonances at the KEKB collider. While previous searches for Z′ performed a data-based estimation of the initial state radiation effect, our search for the Z′ is the first to include effects due to initial state radiation in the signal simulated samples that were used in estimating the detection efficiency. No signal is observed in the Z′ mass range of 0.212-10 GeV/c2, and we set an upper limit on the coupling strength, g′, constraining the possible Z′ contribution to the anomalous magnetic dipole moment of the muon.
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Study of γγ →γψ (2S) at Belle Reviewed International coauthorship
Wang X.L., Gao B.S., Zhu W.J., Adachi I., Aihara H., Al Said S., Asner D.M., Atmacan H., Aulchenko V., Aushev T., Ayad R., Babu V., Bahinipati S., Behera P., Bhardwaj V., Bhuyan B., Bilka T., Biswal J., Bobrov A., Bonvicini G., Bozek A., Bračko M., Campajola M., Červenkov D., Chang M.C., Chekelian V., Chen A., Cheon B.G., Chilikin K., Cho H.E., Cho K., Choi S.K., Choi Y., Choudhury S., Cinabro D., Cunliffe S., Das S., De Nardo G., Dhamija R., Di Capua F., DoleŽal Z., Dong T.V., Eidelman S., Ferber T., Ferlewicz D., Frey A., Fulsom B.G., Garg R., Gaur V., Gabyshev N., Garmash A., Giri A., Goldenzweig P., Golob B., Hadjivasiliou C., Hara T., Hartbrich O., Hayasaka K., Hayashii H., Hedges M.T., Hou W.S., Hsu C.L., Iijima T., Inami K., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Jacobs W.W., Jia S., Jin Y., Joo C.W., Joo K.K., Kahn J., Kang K.H., Kawasaki T., Kiesling C., Kim C.H., Kim D.Y., Kim S.H., Kim Y.K., Kodyš P., Konno T., Korobov A., Korpar S., Kovalenko E., KriŽan P., Kroeger R., Krokovny P., Kulasiri R., Kumar M., Kumar R., Kumara K., Kuzmin A., Kwon Y.J., Lalwani K., Lange J.S., Lee I.S., Lee S.C., Lewis P.
Physical Review D 105 ( 11 ) 112011 2022.6
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review D
Using 980 fb-1 of data at and around the I (nS) (n=1, 2, 3, 4, 5) resonances collected with the Belle detector at the KEKB asymmetric-energy e+e-collider, the two-photon process γγ→γψ(2S) is studied from the threshold to 4.2 GeV for the first time. Two structures are seen in the invariant mass distribution of γψ(2S): one at MR1=3922.4±6.5±2.0 MeV/c2 with a width of ΓR1=22±17±4 MeV, and another at MR2=4014.3±4.0±1.5 MeV/c2 with a width of ΓR2=4±11±6 MeV; the signals are parametrized with the incoherent sum of two Breit-Wigner functions. The first structure is consistent with the X(3915) or the χc2(3930), and the local statistical significance is determined to be 3.1σ with the systematic uncertainties included. The second matches none of the known charmonium or charmoniumlike states, and its global significance is determined to be 2.8σ including the look-elsewhere effect. The production rates are ΓγγB(R1→γψ(2S))=9.8±3.6±1.3 eV assuming (JPC,|λ|)=(0++,0) or 2.0±0.7±0.2 eV with (2++,2) for the first structure and ΓγγB(R2→γψ(2S))=6.2±2.2±0.8 eV with (0++,0) or 1.2±0.4±0.2 eV with (2++,2) for the second. Here, the first errors are statistical and the second systematic, and λ is the helicity.
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Search for charged lepton flavor violating decays of ϒ (1S) Reviewed
Patra S., Bhardwaj V., Trabelsi K., Adachi I., Aihara H., Al Said S., Asner D.M., Atmacan H., Aushev T., Ayad R., Babu V., Bahinipati S., Behera P., Belous K., Bennett J., Bessner M., Bhuyan B., Bilka T., Bobrov A., Bodrov D., Borah J., Bozek A., Bračko M., Branchini P., Browder T.E., Budano A., Campajola M., Červenkov D., Chang M.C., Chang P., Chen A., Cheon B.G., Chilikin K., Cho H.E., Cho K., Cho S.J., Choi S.K., Choi Y., Choudhury S., Cinabro D., Cunliffe S., Das S., De Nardo G., De Pietro G., Dhamija R., Di Capua F., Dingfelder J., Doležal Z., Dong T.V., Epifanov D., Ferber T., Frey A., Fulsom B.G., Garg R., Gaur V., Gabyshev N., Giri A., Goldenzweig P., Graziani E., Gu T., Hara T., Hayasaka K., Hayashii H., Hedges M.T., Hernandez M., Villanueva , Hou W.S., Hsu C.L., Iijima T., Inami K., Inguglia G., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Jacobs W.W., Jang E.J., Jia S., Jin Y., Joo K.K., Kahn J., Kaliyar A.B., Kang K.H., Karyan G., Kawasaki T., Kiesling C., Kim C.H., Kim D.Y., Kim K.H., Kim K.T., Kim Y.K., Kinoshita K., Kodyš P., Konno T., Korobov A., Korpar S., Kovalenko E., Križan P., Kroeger R., Krokovny P.
Journal of High Energy Physics 2022 ( 5 ) 95 2022.5
Language：English Publishing type：Research paper (scientific journal) Publisher：Journal of High Energy Physics
We present a search for the charged lepton-flavor-violating decays ϒ(1S) →ℓ±ℓ′∓ and radiative charged lepton-flavour-violating decays ϒ(1S) → γℓ±ℓ′∓ [ℓ,ℓ′ = e, μ, τ] using the 158 million ϒ(2S) sample collected by the Belle detector at the KEKB collider. This search uses ϒ(1S) mesons produced in ϒ(2S) → π+π− ϒ(1S) transitions. We do not find any significant signal, so we provide upper limits on the branching fractions at the 90% confidence level. [Figure not available: see fulltext.]
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Measurement of the branching fraction and CP asymmetry for B → D ¯ 0π decays Reviewed
Bloomfield T., Sevior M.E., Adachi I., Aihara H., Al Said S., Asner D.M., Aulchenko V., Aushev T., Ayad R., Babu V., Bahinipati S., Behera P., Bennett J., Bessner M., Bilka T., Biswal J., Bobrov A., Bonvicini G., Bozek A., Bračko M., Browder T.E., Campajola M., Cao L., Červenkov D., Chang M.C., Chekelian V., Chen A., Cheon B.G., Chilikin K., Cho H.E., Cho K., Cho S.J., Choi S.K., Choi Y., Choudhury S., Cinabro D., Cunliffe S., Das S., Dash N., De Nardo G., Dhamija R., Di Capua F., DoleŽal Z., Dong T.V., Dubey S., Eidelman S., Epifanov D., Ferber T., Ferlewicz D., Fulsom B.G., Garg R., Gaur V., Garmash A., Giri A., Goldenzweig P., Hadjivasiliou C., Halder S., Hartbrich O., Hayasaka K., Hayashii H., Hedges M.T., Hernandez Villanueva M., Hou W.S., Hsu C.L., Iijima T., Inguglia G., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Jacobs W.W., Jang E.J., Jia S., Jin Y., Joo C.W., Joo K.K., Kaliyar A.B., Kang K.H., Karyan G., Kawasaki T., Kim C.H., Kim D.Y., Kim H.J., Kim S.H., Kim Y.K., Kimmel T.D., Kodyš P., Konno T., Korobov A., Korpar S., Kovalenko E., KriŽan P., Kroeger R., Krokovny P., Kumar M., Kumar R., Kumara K., Kwon Y.J., Lalwani K., Lange J.S.
Physical Review D 105 ( 7 ) 072007 2022.4
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review D
We measure the branching fractions and CP asymmetries for the decays B0→D¯0π0 and B+→D¯0π+, using a data sample of 772×106 BB¯ pairs collected at the (4S) resonance with the Belle detector at the KEKB e+e- collider. The branching fractions obtained and direct CP asymmetries are B(B0→D¯0π0)=[2.70±0.06(stat)±0.10(syst)]×10-4, B(B+→D¯0π+)=[4.53±0.02(stat)±0.15(syst)]×10-3, ACP(B0→D¯0π0)=[+0.42±2.05(stat)±1.22(syst)]%, and ACP(B+→D¯0π+)=[+0.19±0.36(stat)±0.57(syst)]%. The measurements of B are the most precise to date and are in good agreement with previous results, as is the measurement of ACP(B+→D¯0π+). The measurement of ACP for B0→D¯0π0 is the first for this mode, and the value is consistent with Standard Model expectations.
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An improved search for the electric dipole moment of the τ lepton Reviewed
Inami K., Hayasaka K., Adachi I., Aihara H., Al Said S., Asner D.M., Aulchenko V., Aushev T., Ayad R., Babu V., Bahinipati S., Behera P., Bessner M., Bhuyan B., Bilka T., Biswal J., Bobrov A., Bonvicini G., Bozek A., Bračko M., Browder T.E., Campajola M., Červenkov D., Cheon B.G., Chilikin K., Cho H.E., Cho K., Choi Y., Choudhury S., Cinabro D., Cunliffe S., Das S., De Nardo G., Dhamija R., Di Capua F., Doležal Z., Dong T.V., Dubey S., Eidelman S., Epifanov D., Ferber T., Fulsom B.G., Garg R., Gaur V., Gabyshev N., Garmash A., Giri A., Goldenzweig P., Golob B., Greenwald D., Gudkova K., Hadjivasiliou C., Hartbrich O., Hayashii H., Hedges M.T., Hou W.S., Hsu C.L., Iijima T., Inguglia G., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Jacobs W.W., Jang E.J., Jin Y., Joo C.W., Joo K.K., Kato Y., Kawasaki T., Kichimi H., Kiesling C., Kim C.H., Kim D.Y., Kim S.H., Kim Y.K., Kimmel T.D., Kinoshita K., Kodyš P., Konno T., Korpar S., Križan P., Kroeger R., Krokovny P., Kulasiri R., Kumar M., Kumar R., Kumara K., Kwon Y.J., Lalwani K., Lange J.S., Lee S.C., Li C.H., Li J., Li L.K., Li Y.B., Gioi L.L., Libby J., Liventsev D., MacQueen C.
Journal of High Energy Physics 2022 ( 4 ) 110 2022.4
Language：English Publishing type：Research paper (scientific journal) Publisher：Journal of High Energy Physics
We report a measurement of the electric dipole moment of the τ lepton (dτ) using an 833 fb−1 data sample collected near the Υ(4S) resonance, with the Belle detector at the KEKB asymmetric-energy e+e− collider. Using an optimal observable method, we obtain the real and imaginary parts of dτ as Re(dτ) = (−0.62 ± 0.63) × 10−17ecm and Im(dτ) = (−0.40 ± 0.32) × 10−17ecm, respectively. These results are consistent with null electric dipole moment at the present level of experimental sensitivity and improve the sensitivity by about a factor of three. [Figure not available: see fulltext.]
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Measurement of Two-Particle Correlations of Hadrons in e+e-Collisions at Belle Reviewed
Chen Y.C., Lee Y.J., Chang P., Adachi I., Aihara H., Al Said S., Asner D.M., Aushev T., Ayad R., Babu V., Behera P., Belous K., Bennett J., Bessner M., Bilka T., Bodrov D., Borah J., Bračko M., Branchini P., Browder T.E., Budano A., Campajola M., Červenkov D., Chang M.C., Chekelian V., Cheon B.G., Chilikin K., Cho H.E., Cho K., Cho S.J., Choi S.K., Choi Y., Cinabro D., Das S., De Nardo G., De Pietro G., Dhamija R., Di Capua F., Dingfelder J., Dong T.V., Dossett D., Epifanov D., Ferber T., Fulsom B.G., Garg R., Gaur V., Giri A., Goldenzweig P., Gu T., Gudkova K., Hadjivasiliou C., Hartbrich O., Hayasaka K., Hayashii H., Hou W.S., Hsu C.L., Iijima T., Inami K., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Jacobs W.W., Jia S., Jin Y., Kaliyar A.B., Kim C.H., Kim D.Y., Kim K.H., Kim Y.K., Kodyš P., Konno T., Korobov A., Korpar S., Kovalenko E., KriŽan P., Kroeger R., Krokovny P., Kumar M., Kumar R., Kumara K., Kuzmin A., Kwon Y.J., Lai Y.T., Lam T., Lange J.S., Laurenza M., Lee S.C., Li J., Li Y., Li Y.B., Li Gioi L., Libby J., Lieret K., Lin C.W., Liventsev D., Martini A., Masuda M., Matsuda T., Matvienko D.
Physical Review Letters 128 ( 14 ) 142005 2022.4
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review Letters
The measurement of two-particle angular correlation functions in high-multiplicity e+e-collisions at s=10.52 GeV is reported. In this study, the 89.5 fb-1 of hadronic e+e-annihilation data collected by the Belle detector at KEKB are used. Two-particle angular correlation functions are measured in the full relative azimuthal angle (Δφ) and three units of pseudorapidity (Δη), defined by either the electron beam axis or the event-shape thrust axis, and are studied as a function of charged-particle multiplicity. The measurement in the thrust axis analysis, with mostly outgoing quark pairs determining the reference axis, is sensitive to the region of additional soft gluon emissions. No significant anisotropic collective behavior is observed with either coordinate analyses. Near-side jet correlations appear to be absent in the thrust axis analysis. The measurements are compared to predictions from various event generators and are expected to provide new constraints to the phenomenological models in the low-energy regime.
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First measurement of the Λ+c → pη′ decay Reviewed International coauthorship
S. X. Li, J. X. Cui, T. Matsuda et al.
Journal of High Energy Physics 2022 ( 03 ) 090 - 11 pages 2022.3
Language：English Publishing type：Research paper (scientific journal)
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Search for a Light Higgs Boson in Single-Photon Decays of Υ ( 1 S ) Using Υ ( 2 S ) → π + π − Υ ( 1 S ) Tagging Method Reviewed International coauthorship
S. Jia, C. P. Shen, T. Matsuda et al.
Physical Review Letters 128 ( 8 ) 081804 - 9 pages 2022.2
Language：English Publishing type：Research paper (scientific journal)
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The large COMPASS polarized solid ammonia target for Drell–Yan measurements with a pion beam Reviewed International coauthorship
V.Andrieuxe, A.Berlin, T. Matsuda et al.
Nuclear Instruments and Methods in Physics Research Section A 1025 166069 - 10 pages 2022.2
Language：English Publishing type：Research paper (scientific journal)
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Search for tetraquark states X c c ¯ s ¯ s in D + s D + s ( D * + s D * + s ) final states at Belle Reviewed International coauthorship
X. Y. Gao, Y. Li, T. Matsuda et al.
Physical Review D 105 ( 3 ) 032002 - 12 pages 2022.2
Language：English Publishing type：Research paper (scientific journal)
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Exotic meson π1 ( 1600 ) with JP C = 1 − + and its decay into ρ ( 770 ) π Reviewed International coauthorship
G. D. Alexeev, M. G. Alexeev, T. Matsuda et al.
Physical Review D 105 ( 1 ) 012005 - 30 pages 2022.1
Language：English Publishing type：Research paper (scientific journal)
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Study of ¯ B 0 → D + h − ( h = K / π ) decays at Belle Reviewed International coauthorship
E. Waheed , P. Urquijo, T. Matsuda et al.
Physical Review D 105 ( 1 ) 012003 - 9 pages 2022.1
Language：English Publishing type：Research paper (scientific journal)
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Measurement of B ( B s → D s X ) with B s semileptonic tagging Reviewed International coauthorship
B. Wang, K. Kinoshita, T. Matsuda et al.
Physical Review D 105 ( 1 ) 012004 - 9 pages 2022.1
Language：English Publishing type：Research paper (scientific journal)
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Probing transversity by measuring Λ polarisation in SIDIS Reviewed International coauthorship
G.D.Alexeevg, M.G.Alexeev, T. Matsuda et al.
Physics Letters B 824 136834 - 10 pages 2022.1
Language：English Publishing type：Research paper (scientific journal)
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Measurements of the branching fractions of Ξ 0 c → Λ K 0 S , Ξ 0 c → Σ 0 K 0 S , and Ξ 0 c → Σ + K − decays at Belle Reviewed International coauthorship
Y. Li, J. X. Cui, T. Matsuda et al.
Physical Review D 105 ( 1 ) L011102 - 10 pages 2022.1
Language：English Publishing type：Research paper (scientific journal)
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Measurements of q 2 moments of inclusive B → X c ℓ + ν ℓ decays with hadronic tagging Reviewed International coauthorship
R. van Tonder, L. Cao, T. Matsuda et al.
Physical Review D 104 ( 11 ) 112011 - 32 pages 2021.12
Language：English Publishing type：Research paper (scientific journal)
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Study of e+ e− → Υ ( 1 S , 2 S ) η and e+ e− → Υ ( 1 S ) η ′ at √ s = 10.866 GeV with the Belle detector Reviewed International coauthorship
E. Kovalenko, A. Garmash, T. Matsuda et al.
Physical Review D 104 ( 11 ) 112006 - 12 pages 2021.12
Language：English Publishing type：Research paper (scientific journal)
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Search for B 0 → τ ± ℓ ∓ ( ℓ = e , μ ) with a hadronic tagging method at Belle Reviewed International coauthorship
H. Atmacan, A. J. Schwartz, T. Matsuda et al.
Physical Review D 104 ( 9 ) L091105 - 9 pages 2021.11
Language：English Publishing type：Research paper (scientific journal)
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Precise Measurement of the D0 and D+ Lifetimes at Belle II Reviewed International coauthorship
F. Abudin´en, I. Adachi, T. Matsuda et al.,
Physical Review Letters 127 ( 21 ) 211801 - 9 pages 2021.11
Publishing type：Research paper (scientific journal)
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Search for B #UR+ → K #U+ ν ¯ ν Decays Using an Inclusive Tagging Method at Belle II Reviewed International coauthorship
F. Abudin´en, I. Adachi, T. Matsuda et al.
Physical Review Letters 127 ( 18 ) 11802 - 10 pages 2021.10
Language：English Publishing type：Research paper (scientific journal)
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Measurement of the branching fraction of Λ + c → p ω decay at Belle Reviewed International coauthorship
S. X. Li, L. K. Li, T. Matsuda et al.
Physical Review D 104 ( 7 ) 072008 - 8 pages 2021.10
Language：English Publishing type：Research paper (scientific journal)
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Search for lepton-flavor-violating tau-lepton decays to ℓγ at Belle Reviewed International coauthorship
K. Uno, K. Hayasaka, T. Matsuda et al.
Journal of High Energy Physics 2021 ( 10 ) 019 - 12 pages 2021.10
Language：English Publishing type：Research paper (scientific journal)
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Evidence for the decay Ω 0 c → π + Ω ( 2012 ) − → π + ( ¯ K Ξ ) #U−"UR Reviewed International coauthorship
Y. Li, S. S. Tang, T. Matsuda et al.
Physical Review D 104 ( 5 ) 052005 - 9 pages 2021.9
Language：English Publishing type：Research paper (scientific journal)
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Measurement of the masses and widths of the Σc ( 2455 ) + and Σ c ( 2520 ) + baryons Reviewed International coauthorship
J. Yelton, I. Adachi, T. Matsuda et al.
Physical Review D 104 ( 5 ) 052003 - 8 pages 2021.9
Language：English Publishing type：Research paper (scientific journal)
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Triangle Singularity as the Origin of the a1( 1420 ) Reviewed International coauthorship International journal
G. D. Alexeev, M. G. Alexeev, T. Matsuda et al.
Physical Review Letters 127 ( 8 ) 082501 - 7pages 2021.8
Language：English Publishing type：Research paper (scientific journal)
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Search for the decay B 0 s → η ′ η Reviewed International coauthorship
N. K. Nisar, V. Savinov, T. Matsuda et al.
Physical Review D 104 ( 3 ) L031101 - 8 pages 2021.8
Publishing type：Research paper (scientific journal)
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Search for the η c 2 ( 1 D ) in e + e − → γ η c 2 ( 1 D ) at √ s near 10.6 GeV at Belle Reviewed International coauthorship
S. Jia, C. P. Shen, T. Matsuda et al.
Physical Review D 104 ( 1 ) 01201 - 9 pages 2021.7
Publishing type：Research paper (scientific journal)
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Measurements of partial branching fractions of inclusive B → X u ℓ + ν ℓ decays with hadronic tagging Reviewed International coauthorship
L. Cao, W. Sutcliffe, T. Matsuda et al.
Physical Review D 104 ( 1 ) 012008 - 32 pages 2021.7
Language：English Publishing type：Research paper (scientific journal)
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Search for B0 s → η′ X #Es(/)-#ER s at Belle using a semi-inclusive method Reviewed International coauthorship
S. Dubey, T. E. Browderl, T. Matsuda et al.
Physical Review D 104 ( 1 ) 012007 - 11 pages 2021.7
Language：English Publishing type：Research paper (scientific journal)
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Measurements of branching fractions and asymmetry parameters of Ξ0c→ΛK¯∗0, Ξ0c→Σ0K¯∗0, and Ξ0c→Σ+K∗− decays at Belle Reviewed International coauthorship
S. Jia, S.S. Tang,T. Matsuda et al.
Journal of High Energy Physics 2021 ( 06 ) 160 - 13 pages 2021.6
Language：English Publishing type：Research paper (scientific journal)
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Measurement of the energy dependence of the e+e− → BB¯, BB¯∗ and B∗B¯∗ exclusive cross sections Reviewed International coauthorship
R. Mizuk, A. Bondar, T. Matsuda et al.
Journal of High Energy Physics 2021 ( 06 ) 137 - 35 pages 2021.6
Language：English Publishing type：Research paper (scientific journal)
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Measurement of the resonant and nonresonant branching ratios in Ξ0 c → Ξ0 K+ K− Reviewed International coauthorship
J. T. McNeil, J. Yelton, T. Matsuda et al.
Physical Review D 103 ( 11 ) 112002 - 11 pages 2021.6
Language：English Publishing type：Research paper (scientific journal)
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Measurement of the branching fraction of the decay B+ → π+ π− ℓ+ ν ℓ in fully reconstructed events at Belle Reviewed International coauthorship
C. Beleño, A. Frey, T. Matsuda et al.
Physical Review D 103 ( 11 ) 112001 - 22 pages 2021.6
Language：English Publishing type：Research paper (scientific journal)
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Search for the dark photon in B0 → A′A′, A′ → e+e−, μ+μ−, and π+π− decays at Belle Reviewed International coauthorship
S.-H. Park, Y.-J. Kwon, T. Matsuda et al.
Journal of High Energy Physics 2021 ( 4 ) 191 - 15 pages 2021.4
Language：English Publishing type：Research paper (scientific journal)
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Measurements of the branching fractions of Λ+ c → p η and Λ+ c → p π0 decays at Belle Reviewed International coauthorship
S. X. Li, C. P. Shen, T. Matsuda et al.
Physical Review D 103 ( 7 ) 072004 - 9 pages 2021.4
Language：English Publishing type：Research paper (scientific journal)
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Measurement of branching fraction and search for CP violation in B→ϕϕK Reviewed International coauthorship
S. Mohanty, A. B. Kaliyar, T. Matsuda et al.
PHYSICAL REVIEW D 103 ( 5 ) 052013 - p9 2021.3
Language：English Publishing type：Research paper (scientific journal)
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Evidence for X(3872) → J/ψπ+π− Produced in Single-Tag Two-Photon Interactions Reviewed
Y. Teramoto, S. Uehara, T. Matsuda et al.
Physical Review Letters 126 ( 12 ) 122001 - p8 2021.3
Language：English Publishing type：Research paper (scientific journal)
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Test of lepton flavor universality and search for lepton flavor violation in B → Kℓℓ decays Reviewed
S. Choudhury, S. Sandilya, T. Matsuda et al.
Journal of High Energy Physics 03 105 - p.19 2021.3
Language：English Publishing type：Research paper (scientific journal)
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Measurement of branching fractions of Λ+c → ηΛπ+, ηΣ0π+, Λ(1670) π+, and ηΣ(1385)+ Reviewed
J.Y. Lee, K. Tanida, T. Matsuda et al.
Physical Review D 103 ( 5 ) 052005 - p12 2021.3
Language：English Publishing type：Research paper (scientific journal)
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Measurement of time-dependent CP violation parameters in B0 → K0SK0SK0S decays at Belle Reviewed
K.H. Kang, H. Park, T. Matsuda
Physical Review D 103 ( 3 ) 032003 - p8 2021.2
Language：English Publishing type：Research paper (scientific journal)
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Spin density matrix elements in exclusive ω meson muoproduction Reviewed
G.D. Alexeev, M.G. Alexeev, T. Matsuda et al.
European Physical Journal C 81 126 - p22 2021.2
Language：English Publishing type：Research paper (scientific journal)
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Search for lepton-number- and baryon-number-violating tau decays at Belle Reviewed
D. Sahoo, G.B. Mohanty, T. Matsuda et al.
Physical Review D 102 ( 11 ) 111101(R) - p9 2020.12
Language：English Publishing type：Research paper (scientific journal)
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Y. Li, S. Jia, T. Matsuda et al.
Physical Review D 102 ( 11 ) 112001 - p14 2020.12
Language：English Publishing type：Research paper (scientific journal)
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Search for transitions from Y(4S) and Y(5S) to ηb(1S) and ηb(2S) with emission of an ω meson Reviewed
P. Oskin, R. Mizuk, T. Matsuda et al.
Physical Review D 102 ( 9 ) 092011 - p8 2020.11
Language：English Publishing type：Research paper (scientific journal)
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Measurement of the charm-mixing parameter yCP in D0 → K0S ω decays at Belle Reviewed
M. Nayak, D. Cinabro, T. Matsuda et al.
Physical Review D 102 ( 7 ) 071102(R) - 8p 2020.10
Language：English Publishing type：Research paper (scientific journal)
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Study of electromagnetic decays of orbitally excited Ξc baryons Reviewed
J. Yelton, I. Adachi, T. Matsuda et al.
Physical Review D 102 ( 7 ) 071103 - p8 2020.10
Language：English Publishing type：Research paper (scientific journal)
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Antiproton over proton and K- over K+ multiplicity ratios at high z in DIS Reviewed
G.D. Alexeev, M.G. Alexeev, T. Matsuda et al.
Physics Letters B 807 135600 2020.8
Language：English Publishing type：Research paper (scientific journal)
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Measurement of the cross section for hard exclusive π0 Reviewed
M.G. Alexeev, G.D. Alexeev, T. Matsuda et al.
Physics Letters B 805 135454 2020.6
Language：English Publishing type：Research paper (scientific journal)
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Contribution of exclusive diffractive processes to the measured azimuthal asymmetries in SIDIS Reviewed
J. Agarwala, M.G. Alexeev, T. Matsuda et al.
Nuclear Physics B 956 115039 2020.6
Language：English Publishing type：Research paper (scientific journal)
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Update of inclusive cross sections of single and pairs of identified light charged hadrons Reviewed
R. Seidl, I. Adachi,T. Matsuda et al.
PHYSICAL REVIEW D 101 092004 2020.5
Language：English Publishing type：Research paper (scientific journal)
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Evidence for a vector charmoniumlike state in e+e-→Ds+ Ds2*(2573)Ds- +c.c. Reviewed
S. Jia, C. P. Shen, T. Matsuda et al.
PHYSICAL REVIEW D 101 091101(R) 2020.5
Language：English Publishing type：Research paper (scientific journal)
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First search for the ηc2(1D) in B decays at Belle Reviewed
K. Chilikin, I. Adachi, T. Matsuda et al.
Journal of High Energy Physics 05 34 2020.5
Language：English Publishing type：Research paper (scientific journal)
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Polarized target at COMPASS Reviewed
N. Doshita, T. Iwata, T.Matsuda et al.
Proceedings of Science 379 049 - p5 2020.4
Language：English Publishing type：Research paper (international conference proceedings)
DOI： 10.22323/1.379.0049
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Measurement of R(D) and R(D)* with a Semileptonic Tagging Method Reviewed
G. Caria, P. Urquijo, T. Matsuda et al.
PHYSICAL REVIEW LETTERS 124 161803 2020.4
Language：English Publishing type：Research paper (scientific journal)
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I. Adachi, P. Ahlburg, T. Matsuda et al.
PHYSICAL REVIEW LETTERS 124 141801 2020.4
Language：English Publishing type：Research paper (scientific journal)
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Observation of the Radiative Decays of Y(1S) to χ#c1#DR Reviewed
P. Katrenko, I. Adachi, T. Matsuda et al.
PHYSICAL REVIEW LETTERS 124 122001 2020.3
Language：English Publishing type：Research paper (scientific journal)
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Search for B+->μ+νμ and B+->μ+N with inclusive tagging Reviewed
M.T. Prim , F.U. Bernlochner, T. Matsuda et al.
Physical Review D 101 ( 3 ) 032007 2020.2
Language：English Publishing type：Research paper (scientific journal)
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Observation of a vector charmoniumlike state in e+e-->Ds+Ds1(2536)- +c.c. Reviewed
S.Jia, C.P.Shen, T. Matsuda et al.
Physical Review D 100 ( 11 ) 111103(R) 2019.12
Language：English Publishing type：Research paper (scientific journal)
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Y. Li, Y.B. Li, T. Matsuda et al.
Physical Review D 100 ( 11 ) 112010 2019.12
Language：English Publishing type：Research paper (scientific journal)
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Azimuthal asymmetries of back-to-back π±-(π0,η,π±) pairs in e+e- annihilation Reviewed
H. Li, A. Vossen, T. Matsuda et al.
Physical Review D 100 ( 9 ) 092008 2019.11
Language：English Publishing type：Research paper (scientific journal)
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R. Mizuk, A. Bondar, T. Matsuda et al.
Journal of High Energy Physics 2019 ( 10 ) 220 2019.10
Language：English Publishing type：Research paper (scientific journal)
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First measurement of the CKM angle φ3 with B±->D(K#s#DR0π+URπ-URπ0)K± decays Reviewed
P. K. Resmi, J. Libby, T. Matsuda et al.
Journal of High Energy Physics 2019 ( 10 ) 178 2019.10
Language：English Publishing type：Research paper (scientific journal)
DOI： https://link.springer.com/article/10.1007%2FJHEP10%282019%29178
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Observation of τ-->π-ντe+e- and search for τ-->π-ντμ+μ- Reviewed
Y. Jin, H. Aihara, T. Matsuda et al.
Physical Review D 100 ( 7 ) 071101(R) 2019.10
Language：English Publishing type：Research paper (scientific journal)
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Measurement of the CKM matrix element |Vcb| from B0→D*-l+νl Reviewed
E. Waheed, P. Urquijo, T. Matsuda et al.
Physical Review D 100 ( 5 ) 052007 - 32 2019.9
Language：English Publishing type：Research paper (scientific journal)
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Search for Ω(2012)->KΞ(1530)->KπΞ at Belle Reviewed
S.Jia, C.P.Shen, T. Matsuda et al.
Physical Review D 100 ( 3 ) 032006 2019.8
Language：English Publishing type：Research paper (scientific journal)
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First measurements of absolute branching fractions of the Ξc- baryon at Belle Reviewed
Y.B. Li, C.P. Shen, T. Matsuda et al.
Physical Review D 100 ( 3 ) 031101(R) 2019.8
Language：English Publishing type：Research paper (scientific journal)
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Search for B0→X(3872)γ Reviewed
P.-C. Chou, P. Chang, T. Matsuda et al.
Physical Review D 100 ( 1 ) 012002 2019.7
Language：English Publishing type：Research paper (scientific journal)
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R.Seidl, I. Adachi, T. Matsuda et al.
Physical Review D 99 ( 11 ) 112006 - 15 2019.6
Language：English Publishing type：Research paper (scientific journal)
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Search for X(3872) and X(3915) decay int χc1π0 in B decays at Belle Reviewed
V. Bhardwaj, S. Jia, T. Matsuda et al.
Physical Review D 99 ( 11 ) 111101(R) 2019.6
Language：English Publishing type：Research paper (scientific journal)
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Evidence for B+→hcK+ and observation of ηc(2S)→ppbarπ+π- Reviewed
K. Chilikin, I. Adachi, T. Matsuda et al.
Physical Review D 100 ( 1 ) 012001 - 16 2019.6
Language：English Publishing type：Research paper (scientific journal)
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R. Akhunzyanovg, M.G. Alexeevy, T. Matsuda et al.
Physics Letters B 793 188 - 194 2019.6
Language：English Publishing type：Research paper (scientific journal)
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Measurement of branching fraction and final-state asymmetry for the Bbar0->K00K∓π± decay Reviewed
Y.-T, Lai, I. Adachi, T. Matsuda et al.
Physical Review D 100 ( 1 ) 011101(R) 2019.6
Language：English Publishing type：Research paper (scientific journal)
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Evidence for the decay B0->ppπ0 Reviewed
B. Pal, I . Adachi, T. Matsuda et al.
Physical Review D 99 ( 9 ) 091104(R) 2019.5
Language：English Publishing type：Research paper (scientific journal)
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Search for the B→Y(4260)K, Y(4260)→J/ψπ+π- decays Reviewed
R. Garg, V. Bhardwaj, T. Matsuda et al.
Physical Review D 99 ( 7 ) 071102 - 8 2019.4
Language：English Publishing type：Research paper (scientific journal)
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Measurement of PT-weighted Sivers asymmetries in leptoproduction of hadrons Reviewed
M.G. Alexeev, G.D. Alexeev, T. Matsuda et al.
Nuclear Physics B 940 34 - 53 2019.3
Language：English Publishing type：Research paper (scientific journal)
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First Measurements of Absolute Branching Fractions of the Ξc0 Baryon at Belle Reviewed
Y.B. Li, C.P. Shen, T. Matsuda et al.
Physical Review Letters 122 ( 8 ) 082001 - 7 2019.2
Language：English Publishing type：Research paper (scientific journal)
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Observation of Ξ(1620)0 and Evidence for Ξ(1690)0 in Ξc+→Ξ-π#+Rπ#U+ Decays Reviewed
M. Sumihama, I. Adachi, T. Matsuda et al.
Physical Review Letters 122 ( 7 ) 072501 - 7 2019.2
Language：English Publishing type：Research paper (scientific journal)
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Measurements of isospin asymmetry and difference of direct CP asymmetries in inclusive B→Xsγ decays Reviewed
S. Watanuki, A. Ishikawa, T. Matsuda et al.
Physical Review D 99 032012 - 13 2019.2
Language：English Publishing type：Research paper (scientific journal)
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Measurements of branching fraction and direct CP asymmetry in B±→Ks0Ks0K± and a search for Ks0Ks0π± Reviewed
A.B. Kaliyar, P. Behera, T. Matsuda et al.
Physical Review D 99 ( 3 ) 031102 - 9 2019.2
Language：English Publishing type：Research paper (scientific journal)
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Observation of B+→pΛ¯K+K- and B+→p¯ΛK+K#U+UR#Ep(/)-#ER Reviewed
P.-C. Lu, M.-Z. Wang, T. Matsuda et al.
Physical Review D 99 032003 - 9 2019.2
Language：English Publishing type：Research paper (scientific journal)
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Observation of Transverse Λ/Λbar Hyperon Polarization in e+e- Annihilation at Belle Reviewed
Y. Guan, A. Vossen, T. Matsuda et al.
Physical Review Letters 122 ( 4 ) 042001 - 8 2019.1
Language：English Publishing type：Research paper (scientific journal)
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Search for CP violation with kinematic asymmetries in the D0→K+K-π+π- decay Reviewed
J.B. Kim, E. Won, T. Matsuda et al.
Physical Review D 99 ( 1 ) 011104 - 7 2019.1
Language：English Publishing type：Research paper (scientific journal)
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Measurement of time-dependent CP violation in B0→Ks0π0π0 Reviewed
Y. Yusa, H. Aihara, T. Matsuda et al.
Physical Review D 99 ( 1 ) 011102 - 7 2019.1
Language：English Publishing type：Research paper (scientific journal)
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Search for a Light CP-odd Higgs Boson and Low-Mass Dark Matter at the Belle Experiment Reviewed
I.S. Seong, S.E. Vahsen, T. Matsuda et al.
Physical Review Letters 122 ( 1 ) 011801 - 8 2019.1
Language：English Publishing type：Research paper (scientific journal)
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I. Adachi, T. Adye, T. Matsuda外
PHYSICAL REVIEW LETTERS 121 261801 2018.12
Language：English Publishing type：Research paper (scientific journal)
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I. Adachi, T. Adye, T. Matsuda外
Physical Review D 98 112012 2018.12
Language：English Publishing type：Research paper (scientific journal)
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Measurement of the branching fraction and time-dependent CP asymmetry for B0→J/ψπ0 decays Reviewed
B. Pal, A.J. Schwartz, T. Matsuda et al.
Physical Review D 98 112008 - 9 2018.12
Language：English Publishing type：Research paper (scientific journal)
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Measurement of the decays Λc → Σππ at Belle Reviewed
M. Berger, C. Schwanda, T. Matsuda外
Physical Review D 98 112006 2018.12
Language：English Publishing type：Research paper (scientific journal)
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Observation of Υ(2S)→γηb(1S) Decay Reviewed
B.G. Fulsom, T.K. Pedlar, T. Matsuda et al.
Physical Review Letters 121 ( 23 ) 232001 - 8 2018.12
Language：English Publishing type：Research paper (scientific journal)
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Observation of e+e-→γχc1 and search for e+e-→γχc0, γχc2(1) and γηc at √s near 10.6 GeV at Belle Reviewed
S. Jia, X.L. Wang, T. Matsuda et al.
Physical Review D 98 ( 9 ) 092015 - 8 2018.11
Language：English Publishing type：Research paper (scientific journal)
-
C. Adolph, M. Aghasyan, T. Matsuda外
The European Physical Journal C 78 952 2018.11
Language：English Publishing type：Research paper (scientific journal)
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Observation of e+e-→π+π-π0χb1,2(1P) and search for e+e-→φχb1,2(1P) at √s=10.96-11.05 GeV Reviewed
J.H.Yin, C.Z.Yuan, T. Matsuda et al.
Physical Review D 98 ( 9 ) 091102 - 9 2018.11
Language：English Publishing type：Research paper (scientific journal)
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R.Akhunzyanov, M.G.Alexeev, T. Matsuda外
Physics Letters B 786 390 - 398 2018.11
Language：English Publishing type：Research paper (scientific journal)
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Light isovector resonances in π−p→π−π−π+p at 190 GeV/c Reviewed
M. Aghasyan, M. G. Alexeev, T. Matsuda外
Physical Review D 98 092003 2018.11
Language：English Publishing type：Research paper (scientific journal)
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Search for the lepton-flavor-violating decay B0→K*0μ±e∓プラス Reviewed
S. Sandilya, K. Trabelsi, T. Matsuda et al.
Physical Review D 98 ( 7 ) 071101 - 8 2018.10
Language：English Publishing type：Research paper (scientific journal)
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Measurement of ηc(1S), ηc(2S), and nonresonant η′π+π− production via two-photon collisions Reviewed
Q. N. Xu, I. Adachi, T. Matsuda外
Physical Review D 98 072001 2018.10
Language：English Publishing type：Research paper (scientific journal)
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Search for muoproduction of X(3872) at COMPASS and indication of a new state X˜(3872) Reviewed
M. Aghasyan, R. Akhunzyanov, T. Matsuda外
Physics Letters B 783 334 - 340 2018.8
Language：English Publishing type：Research paper (scientific journal)
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U. Tamponi, E. Guido, T. Matsuda外
European Physical Journal C 78 633 2018.8
Language：English Publishing type：Research paper (scientific journal)
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Observation of Υ(4S)→η′Υ(1S) Reviewed
E. Guido, R. Mussa, T. Matsuda外
Physical Review Letters 121 062001 2018.8
Language：English Publishing type：Research paper (scientific journal)
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Observation of an Excited Ω− Baryon Reviewed
J. Yelton, I. Adachi, T. Matsuda外
Physical Review Letters 121 052003 2018.8
Language：English Publishing type：Research paper (scientific journal)
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Search for B−→μ− #Eν(/)-#ERμ Decays at the Belle Experiment Reviewed
A. Sibidanov1,*, K. E. Varvell1, I. Adachi2,3, H. Aihara4, S. Al Said5,6, D. M. Asner7, T. Aushev8, R. Ayad5, V. Babu9, I. Badhrees5,10, S. Bahinipati11, A. M. Bakich1, V. Bansal7, E. Barberio12, P. Behera13, B. Bhuyan14, J. Biswal15, A. Bozek16, M. Bračko17,15, T. E. Browder18, D. Červenkov19, P. Chang20, V. Chekelian21, A. Chen22, B. G. Cheon23, K. Chilikin24,25, K. Cho26, S.-K. Choi27, Y. Choi28, D. Cinabro29, T. Czank30, N. Dash11, S. Di Carlo29, Z. Doležal19, Z. Drásal19, D. Dutta9, S. Eidelman31,32, D. Epifanov31,32, J. E. Fast7, T. Ferber33, B. G. Fulsom7, V. Gaur34, N. Gabyshev31,32, A. Garmash31,32, P. Goldenzweig35, D. Greenwald36, Y. Guan37,2, E. Guido38, J. Haba2,3, K. Hayasaka39, H. Hayashii40, M. T. Hedges18, S. Hirose41, W.-S. Hou20, C.-L. Hsu12, T. Iijima42,41, K. Inami41, G. Inguglia33, A. Ishikawa30, R. Itoh2,3, M. Iwasaki43, Y. Iwasaki2, W. W. Jacobs37, I. Jaegle44, H. B. Jeon45, Y. Jin4, K. K. Joo46, T. Julius12, J. Kahn47, A. B. Kaliyar13, K. H. Kang45, G. Karyan33, T. Kawasaki39, C. Kiesling21, D. Y. Kim48, J. B. Kim49, S. H. Kim23, Y. J. Kim26, K. Kinoshita50, P. Kodyš19, S. Korpar17,15, D. Kotchetkov18, P. Križan51,15, P. Krokovny31,32, T. Kuhr47, R. Kulasiri52, R. Kumar53, A. Kuzmin31,32, Y.-J. Kwon54, J. S. Lange55, I. S. Lee23, C. H. Li12, L. Li56, L. Li Gioi21, J. Libby13, D. Liventsev34,2, M. Lubej15, T. Luo57, M. Masuda58, T. Matsuda59, M. Merola60, K. Miyabayashi40, H. Miyata39, R. Mizuk24,25,8, G. B. Mohanty9, H. K. Moon49, T. Mori41, R. Mussa38, E. Nakano43, M. Nakao2,3, T. Nanut15, K. J. Nath14, Z. Natkaniec16, M. Nayak29,2, M. Niiyama61, N. K. Nisar57, S. Nishida2,3, S. Ogawa62, S. Okuno63, H. Ono64,39, P. Pakhlov24,25, G. Pakhlova24,8, B. Pal50, C.-S. Park54, C. W. Park28, H. Park45, S. Paul36, T. K. Pedlar65, R. Pestotnik15, L. E. Piilonen34, M. Ritter47, A. Rostomyan33, M. Rozanska16, Y. Sakai2,3, M. Salehi66,47, S. Sandilya50, Y. Sato41, V. Savinov57, O. Schneider67, G. Schnell68,69, C. Schwanda70, Y. Seino39, K. Senyo71, M. E. Sevior12, V. Shebalin31,32, C. P. Shen72, T.-A. Shibata73, J.-G. Shiu20, F. Simon21,74, A. Sokolov75, E. Solovieva24,8, M. Starič15, J. F. Strube7, J. Stypula16, M. Sumihama76, K. Sumisawa2,3, T. Sumiyoshi77, M. Takizawa78,79,80, U. Tamponi38,81, K. Tanida82, F. Tenchini12, K. Trabelsi2,3, M. Uchida73, S. Uehara2,3, T. Uglov24,8, Y. Unno23, S. Uno2,3, P. Urquijo12, C. Van Hulse68, G. Varner18, V. Vorobyev31,32, C. H. Wang83, M.-Z. Wang20, P. Wang84, M. Watanabe39, S. Watanuki30, E. Widmann85, E. Won49, Y. Yamashita64, H. Ye33, J. Yelton44, C. Z. Yuan84, Y. Yusa39, Z. P. Zhang56, V. Zhilich31,32, V. Zhukova24,25, V. Zhulanov31,32, and A. Zupanc51,15 (The Belle Collaboration)
Physical Review Letters 121 ( 3 ) 031801 2018.7
Language：English Publishing type：Research paper (scientific journal)
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石川 雅貴, 松田 達郎, 佐伯 朋子, 高橋 ひろみ, 伊藤 健一
討論会発表抄録 60 ( 0 ) 194 - 195 2018.6
Language：English Publishing type：Research paper (conference, symposium, etc.) Publisher：一般社団法人日本粘土学会
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P19 放射性Csの汚染土壌の粒子の特徴と分級による減容化手法の検討
石川 雅貴, 山元 奎二, 松田 達郎, 伊藤 健一, 鈴木 正哉, 八田 珠郎, 山田 裕久
討論会発表抄録 59 ( 0 ) 174 - 175 2018.6
Language：English Publishing type：Research paper (conference, symposium, etc.) Publisher：一般社団法人日本粘土学会
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Search for Υ(1S,2S)→Z+c Z(′)−c and e+e−→Zc+Zc(′)− at s √s = 10.52, 10.58, and 10.867 GeV Reviewed
S. Jia, C. P. Shen, T. Matsuda外
Physical Review D 97 112004 2018.6
Language：English Publishing type：Research paper (scientific journal)
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M. Aghasyan x, M.G. Alexeev y, G.D. Alexeev g, A. Amoroso y, z, V. Andrieux ab, t, N.V. Anfimov g, V. Anosov g, A. Antoshkin g, K. Augsten g, r, W. Augustyniak ac, A. Austregesilo o, C.D.R. Azevedo a, B. Badełek ad, F. Balestra y, z, M. Ball c, J. Barth d, R. Beck c, Y. Bedfer t, J. Bernhard l, i, K. Bicker o, i, E.R. Bielert i, R. Birsa x, M. Bodlak q, P. Bordalo k, 1, F. Bradamante w, x, A. Bressan w, x, M. Büchele h, V.E. Burtsev aa, L. Capozza t, W.-C. Chang u, C. Chatterjee f, M. Chiosso y, z, I. Choi ab, A.G. Chumakov aa, S.-U. Chung o, 2, A. Cicuttin x, 3, M.L. Crespo x, 3, S. Dalla Torre x, S.S. Dasgupta f, S. Dasgupta w, x, O.Yu. Denisov z, L. Dhara f, S.V. Donskov s, N. Doshita af, Ch. Dreisbach o, W. Dünnweber 4, R.R. Dusaev aa, M. Dziewiecki ae, A. Efremov g, 5, P.D. Eversheim c, M. Faessler 4, A. Ferrero t, M. Finger q, M. Finger jr. q, H. Fischer h, C. Franco k, N. du Fresne von Hohenesche l, i, J.M. Friedrich o, V. Frolov g, i, E. Fuchey t, 6, F. Gautheron b, O.P. Gavrichtchouk g, S. Gerassimov n, o, J. Giarra l, F. Giordano ab, I. Gnesi y, z, M. Gorzellik h, 7, A. Grasso y, z, A. Gridin g, M. Grosse Perdekamp ab, B. Grube o, T. Grussenmeyer h, A. Guskov g, D. Hahne d, G. Hamar x, D. von Harrach l, F.H. Heinsius h, R. Heitz ab, F. Herrmann h, N. Horikawa p, 8, N. d'Hose t, C.-Y. Hsieh u, 9, S. Huber o, S. Ishimoto af, 10, A. Ivanov y, z, T. Iwata af, V. Jary r, R. Joosten c, P. Jörg h, E. Kabuß l, A. Kerbizi w, x, B. Ketzer c, G.V. Khaustov s, Yu.A. Khokhlov s, 11, Yu. Kisselev g, F. Klein d, J.H. Koivuniemi b, ab, V.N. Kolosov s, K. Kondo af, K. Königsmann h, I. Konorov n, o, V.F. Konstantinov s, A.M. Kotzinian z, 12, O.M. Kouznetsov g, Z. Kral r, M. Krämer o, P. Kremser h, F. Krinner o, Z.V. Kroumchtein g, 29, Y. Kulinich ab, F. Kunne t, K. Kurek ac, R.P. Kurjata ae, I.I. Kuznetsov aa, A. Kveton r, A.A. Lednev s, 29, E.A. Levchenko aa, M. Levillain t, S. Levorato x, Y.-S. Lian u, 13, J. Lichtenstadt v, R. Longo y, z, V.E. Lyubovitskij aa, 14, A. Maggiora z, A. Magnon ab, N. Makins ab, N. Makke x, 3, G.K. Mallot i, S.A. Mamon aa, B. Marianski ac, A. Martin w, x, J. Marzec ae, J. Matoušek w, x, q, H. Matsuda af, T. Matsuda m, G.V. Meshcheryakov g, M. Meyer ab, t, W. Meyer b, Yu.V. Mikhailov s, M. Mikhasenko c, E. Mitrofanov g, N. Mitrofanov g, Y. Miyachi af, A. Moretti w, x, A. Nagaytsev g, F. Nerling l, D. Neyret t, J. Nový r, i, W.-D. Nowak l, G. Nukazuka af, A.S. Nunes k, A.G. Olshevsky g, I. Orlov g, M. Ostrick l, D. Panzieri z, 15, B. Parsamyan y, z, S. Paul o, J.-C. Peng ab, F. Pereira a, M. Pešek q, M. Pešková q, D.V. Peshekhonov g, N. Pierre l, t, S. Platchkov t, J. Pochodzalla l, V.A. Polyakov s, J. Pretz d, 16, M. Quaresma k, C. Quintans k, S. Ramos k, 1, C. Regali h, G. Reicherz b, C. Riedl ab, N.S. Rogacheva g, D.I. Ryabchikov s, o, A. Rybnikov g, A. Rychter ae, R. Salac r, V.D. Samoylenko s, A. Sandacz ac, C. Santos x, S. Sarkar f, I.A. Savin g, 5, T. Sawada u, G. Sbrizzai w, x, P. Schiavon w, x, K. Schmidt h, 7, H. Schmieden d, K. Schönning i, 17, E. Seder t, A. Selyunin g, L. Silva k, L. Sinha f, S. Sirtl h, M. Slunecka g, J. Smolik g, A. Srnka e, D. Steffen i, o, M. Stolarski k, O. Subrt i, r, M. Sulc j, H. Suzuki af, 8, A. Szabelski w, x, ac, T. Szameitat h, 7, P. Sznajder ac, M. Tasevsky g, S. Tessaro x, F. Tessarotto x, A. Thiel c, J. Tomsa q, F. Tosello z, V. Tskhay n, S. Uhl o, B.I. Vasilishin aa, A. Vauth i, J. Veloso a, A. Vidon t, M. Virius r, S. Wallner o, T. Weisrock l, M. Wilfert l, R. Windmolders d, J. ter Wolbeek h, 7, K. Zaremba ae, P. Zavada g, M. Zavertyaev n, E. Zemlyanichkina g, 5, M. Ziembicki ae
Physics Letters B 781 464 - 72 2018.6
Language：English Publishing type：Research paper (scientific journal)
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Measurement of time-dependent CP CP asymmetries in B0 →K0S ηγ decays Reviewed
H. Nakano, A. Ishikawa, T. Matsuda外
Physical Review D 97 092003 2018.5
Language：English Publishing type：Research paper (scientific journal)
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Search for B→hν#Eν(/)¯#ER decays with semileptonic tagging at Belle Reviewed
J. Grygier, P. Goldenzweig, M. Heck, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, R. Ayad, T. Aziz, V. Babu, I. Badhrees, S. Bahinipati, A. M. Bakich, V. Bansal, E. Barberio, P. Behera, B. Bhuyan, J. Biswal, A. Bobrov, A. Bondar, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, D. Červenkov, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, Y. Choi, D. Cinabro, N. Dash, S. Di Carlo, Z. Doležal, Z. Drásal, D. Dutta, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, M. Gelb, R. Gillard, B. Golob, O. Grzymkowska, E. Guido, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. T. Hedges, C.-L. Hsu, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, Y. Iwasaki, W. W. Jacobs, I. Jaegle, H. B. Jeon, Y. Jin, D. Joffe, K. K. Joo, T. Julius, J. Kahn, A. B. Kaliyar, K. H. Kang, G. Karyan, P. Katrenko, T. Kawasaki, T. Keck, H. Kichimi, C. Kiesling, D. Y. Kim, H. J. Kim, J. B. Kim, K. T. Kim, M. J. Kim, S. H. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. Križan, P. Krokovny, T. Kuhr, R. Kulasiri, T. Kumita, A. Kuzmin, Y.-J. Kwon, J. S. Lange, C. H. Li, L. Li, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Lubej, T. Luo, M. Masuda, T. Matsuda, D. Matvienko, F. Metzner, K. Miyabayashi, H. Miyake, H. Miyata, R. Mizuk, G. B. Mohanty, H. K. Moon, T. Mori, R. Mussa, E. Nakano, M. Nakao, T. Nanut, K. J. Nath, Z. Natkaniec, M. Nayak, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, H. Ono, Y. Onuki, G. Pakhlova, B. Pal, C.-S. Park, C. W. Park, H. Park, S. Paul, T. K. Pedlar, L. Pesántez, L. E. Piilonen, M. Prim, C. Pulvermacher, M. Ritter, A. Rostomyan, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, Y. Sato, V. Savinov, T. Schlüter, O. Schneider, G. Schnell, C. Schwanda, A. J. Schwartz, Y. Seino, K. Senyo, I. S. Seong, M. E. Sevior, V. Shebalin, C. P. Shen, T.-A. Shibata, J.-G. Shiu, B. Shwartz, F. Simon, E. Solovieva, M. Starič, J. F. Strube, T. Sumiyoshi, M. Takizawa, U. Tamponi, F. Tenchini, K. Trabelsi, T. Tsuboyama, M. Uchida, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Ushiroda, C. Van Hulse, G. Varner, V. Vorobyev, A. Vossen, E. Waheed, B. Wang, C. H. Wang, M.-Z. Wang, P. Wang, M. Watanabe, Y. Watanabe, S. Wehle, K. M. Williams, E. Won, H. Yamamoto, Y. Yamashita, H. Ye, Y. Yook, C. Z. Yuan, Y. Yusa, Z. P. Zhang, V. Zhilich, V. Zhukova, V. Zhulanov, M. Ziegler, and A. Zupanc (The Belle Collaboration)
Physical Review D 96 091101 2018.5
Language：English Publishing type：Research paper (scientific journal)
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New analysis of ηπ tensor resonances measured at the COMPASS experiment Reviewed
M. Aghasyan ae, R. Akhunzyanov n, M.G. Alexeev af, G.D. Alexeev n, A. Amoroso af, ag, V. Andrieux ai, aa, N.V. Anfimov n, V. Anosov n, A. Antoshkin n, K. Augsten n, y, W. Augustyniak aj, A. Austregesilo v, C.D.R. Azevedo h, B. Badełek ak, F. Balestra af, ag, M. Ball j, J. Barth k, R. Beck j, Y. Bedfer aa, J. Bernhard s, p, K. Bicker v, p, E.R. Bielert p, R. Birsa ae, M. Bodlak x, P. Bordalo r, 8, F. Bradamante ad, ae, A. Bressan ad, ae, M. Büchele o, V.E. Burtsev ah, W.-C. Chang ab, C. Chatterjee m, M. Chiosso af, ag, I. Choi ai, A.G. Chumakov ah, S.-U. Chung v, 9, A. Cicuttin ae, 10, M.L. Crespo ae, 10, S. Dalla Torre ae, S.S. Dasgupta m, S. Dasgupta ad, ae, O.Yu. Denisov ag, L. Dhara m, S.V. Donskov z, N. Doshita am, Ch. Dreisbach v, W. Dünnweber 11, R.R. Dusaev ah, M. Dziewiecki al, A. Efremov n, 18, P.D. Eversheim j, M. Faessler 11, A. Ferrero aa, M. Finger x, M. Finger jr. x, H. Fischer o, C. Franco r, N. du Fresne von Hohenesche s, p, J.M. Friedrich v, V. Frolov n, p, E. Fuchey aa, 12, F. Gautheron i, O.P. Gavrichtchouk n, S. Gerassimov u, v, J. Giarra s, F. Giordano ai, I. Gnesi af, ag, M. Gorzellik o, 24, A. Grasso af, ag, M. Grosse Perdekamp ai, B. Grube v, T. Grussenmeyer o, A. Guskov n, D. Hahne k, G. Hamar ae, D. von Harrach s, F.H. Heinsius o, R. Heitz ai, F. Herrmann o, N. Horikawa w, 13, N. d'Hose aa, C.-Y. Hsieh ab, 14, S. Huber v, S. Ishimoto am, 15, A. Ivanov af, ag, Yu. Ivanshin n, 18, T. Iwata am, V. Jary y, R. Joosten j, P. Jörg o, E. Kabuß s, A. Kerbizi ad, ae, B. Ketzer j, G.V. Khaustov z, Yu.A. Khokhlov z, 16, Yu. Kisselev n, F. Klein k, J.H. Koivuniemi i, ai, V.N. Kolosov z, K. Kondo am, K. Königsmann o, I. Konorov u, v, V.F. Konstantinov z, A.M. Kotzinian ag, 20, O.M. Kouznetsov n, Z. Kral y, M. Krämer v, P. Kremser o, F. Krinner v, Z.V. Kroumchtein n, 7, Y. Kulinich ai, F. Kunne aa, K. Kurek aj, R.P. Kurjata al, I.I. Kuznetsov ah, A. Kveton y, A.A. Lednev z, 7, E.A. Levchenko ah, M. Levillain aa, S. Levorato ae, Y.-S. Lian ab, 21, J. Lichtenstadt ac, R. Longo af, ag, V.E. Lyubovitskij ah, A. Maggiora ag, A. Magnon ai, N. Makins ai, N. Makke ae, 10, G.K. Mallot p, S.A. Mamon ah, B. Marianski aj, A. Martin ad, ae, J. Marzec al, J. Matoušek ad, ae, x, H. Matsuda am, T. Matsuda t, G.V. Meshcheryakov n, M. Meyer ai, aa, W. Meyer i, Yu.V. Mikhailov z, M. Mikhasenko j, E. Mitrofanov n, N. Mitrofanov n, Y. Miyachi am, A. Nagaytsev n, F. Nerling s, D. Neyret aa, J. Nový y, p, W.-D. Nowak s, G. Nukazuka am, A.S. Nunes r, A.G. Olshevsky n, I. Orlov n, M. Ostrick s, D. Panzieri ag, 22, B. Parsamyan af, ag, S. Paul v, J.-C. Peng ai, F. Pereira h, M. Pešek x, M. Pešková x, D.V. Peshekhonov n, N. Pierre s, aa, S. Platchkov aa, J. Pochodzalla s, V.A. Polyakov z, J. Pretz k, 17, M. Quaresma r, C. Quintans r, S. Ramos r, 8, C. Regali o, G. Reicherz i, C. Riedl ai, N.S. Rogacheva n, D.I. Ryabchikov z, v, A. Rybnikov n, A. Rychter al, R. Salac y, V.D. Samoylenko z, A. Sandacz aj, C. Santos ae, S. Sarkar m, I.A. Savin n, 18, T. Sawada ab, G. Sbrizzai ad, ae, P. Schiavon ad, ae, T. Schlüter 19, K. Schmidt o, 24, H. Schmieden k, K. Schönning p, 23, E. Seder aa, A. Selyunin n, L. Silva r, L. Sinha m, S. Sirtl o, M. Slunecka n, J. Smolik n, A. Srnka l, D. Steffen p, v, M. Stolarski r, O. Subrt p, y, M. Sulc q, H. Suzuki am, 13, A. Szabelski ad, ae, aj, T. Szameitat o, 24, P. Sznajder aj, M. Tasevsky n, S. Tessaro ae, F. Tessarotto ae, A. Thiel j, J. Tomsa x, F. Tosello ag, V. Tskhay u, S. Uhl v, B.I. Vasilishin ah, A. Vauth p, J. Veloso h, A. Vidon aa, M. Virius y, S. Wallner v, T. Weisrock s, M. Wilfert s, J. ter Wolbeek o, 24, K. Zaremba al, P. Zavada n, M. Zavertyaev u, E. Zemlyanichkina n, 18, N. Zhuravlev n, M. Ziembicki a
Physics Letters B 779 464 - 472 2018.4
Language：English Publishing type：Research paper (scientific journal)
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Production cross sections of hyperons and charmed baryons from e+ e− annihilation near √s=10.52 GeV Reviewed
M. Niiyama37, M. Sumihama11, T. Nakano62, I. Adachi15,12, H. Aihara76, S. Al Said71,34, D. M. Asner60, V. Aulchenko3,58, T. Aushev48, R. Ayad71, V. Babu72, I. Badhrees71,33, A. M. Bakich70, V. Bansal60, E. Barberio45, M. Berger68, V. Bhardwaj18, B. Bhuyan20, J. Biswal29, A. Bobrov3,58, G. Bonvicini80, A. Bozek55, M. Bračko43,29, T. E. Browder14, D. Červenkov4, M.-C. Chang9, V. Chekelian44, A. Chen52, B. G. Cheon13, K. Chilikin40,47, R. Chistov40,47, K. Cho35, Y. Choi69, D. Cinabro80, N. Dash19, S. Di Carlo80, Z. Doležal4, Z. Drásal4, D. Dutta72, S. Eidelman3,58, H. Farhat80, J. E. Fast60, T. Ferber7, B. G. Fulsom60, V. Gaur79, N. Gabyshev3,58, A. Garmash3,58, R. Gillard80, P. Goldenzweig31, J. Haba15,12, T. Hara15,12, K. Hayasaka57, H. Hayashii51, T. Iijima50,49, K. Inami49, A. Ishikawa74, R. Itoh15,12, Y. Iwasaki15, W. W. Jacobs22, I. Jaegle8, Y. Jin76, D. Joffe32, K. K. Joo5, T. Julius45, G. Karyan7, Y. Kato49, P. Katrenko48,40, D. Y. Kim67, H. J. Kim38, J. B. Kim36, K. T. Kim36, M. J. Kim38, S. H. Kim13, Y. J. Kim35, K. Kinoshita6, P. Kodyš4, D. Kotchetkov14, P. Križan41,29, P. Krokovny3,58, R. Kulasiri32, A. Kuzmin3,58, Y.-J. Kwon82, J. S. Lange10, I. S. Lee13, C. H. Li45, L. Li65, Y. Li79, L. Li Gioi44, J. Libby21, D. Liventsev79,15, T. Luo61, M. Masuda75, T. Matsuda46, D. Matvienko3,58, M. Merola26, K. Miyabayashi51, H. Miyata57, R. Mizuk40,47,48, H. K. Moon36, T. Mori49, R. Mussa27, E. Nakano59, M. Nakao15,12, T. Nanut29, K. J. Nath20, Z. Natkaniec55, M. Nayak80,15, N. K. Nisar61, S. Nishida15,12, S. Ogawa73, H. Ono56,57, P. Pakhlov40,47, G. Pakhlova40,48, B. Pal6, S. Pardi26, H. Park38, T. K. Pedlar83, L. E. Piilonen79, C. Pulvermacher15, M. Ritter42, H. Sahoo14, Y. Sakai15,12, S. Sandilya6, L. Santelj15, Y. Sato49, V. Savinov61, O. Schneider39, G. Schnell1,17, C. Schwanda24, R. Seidl64, Y. Seino57, K. Senyo81, M. E. Sevior45, V. Shebalin3,58, C. P. Shen2, T.-A. Shibata77, J.-G. Shiu54, B. Shwartz3,58, F. Simon44,84, A. Sokolov25, E. Solovieva40,48, M. Starič29, T. Sumiyoshi78, M. Takizawa66,16,63, K. Tanida28, F. Tenchini45, M. Uchida77, S. Uehara15,12, T. Uglov40,48, Y. Unno13, S. Uno15,12, C. Van Hulse1, G. Varner14, A. Vossen22, C. H. Wang53, M.-Z. Wang54, P. Wang23, Y. Watanabe30, E. Widmann68, K. M. Williams79, E. Won36, Y. Yamashita56, H. Ye7, C. Z. Yuan23, Y. Yusa57, Z. P. Zhang65, V. Zhilich3,58, V. Zhulanov3,58, and A. Zupanc41,29 (Belle Collaboration)
Physical Review D 97 ( 7 ) 072005 2018.4
Language：English Publishing type：Research paper (scientific journal)
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Observation of Ξc(2930)0 and updated measurement of B− →K− Λ+c Λ¯−c at Belle Reviewed
Y. B. Li, C. P. ShenEmail author, I. Adachi, J. K. Ahn, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, R. Ayad, V. Babu, I. Badhrees, A. M. Bakich, Y. Ban, V. Bansal, P. Behera, M. Berger, V. Bhardwaj, B. Bhuyan, J. Biswal, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, D. Červenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S.-K. Choi, Y. Choi, D. Cinabro, S. Cunliffe, N. Dash, S. Di Carlo, Z. Doležal, Z. Drásal, S. Eidelman, D. Epifanov, J. E. Fast, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, M. Gelb, A. Giri, P. Goldenzweig, E. Guido, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. T. Hedges, W.-S. Hou, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, S. Jia, Y. Jin, K. K. Joo, T. Julius, G. Karyan, Y. Kato, T. Kawasaki, H. Kichimi, C. Kiesling, D. Y. Kim, J. B. Kim, K. T. Kim, S. H. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. Križan, R. Kroeger, P. Krokovny, R. Kulasiri, T. Kumita, A. Kuzmin, Y.-J. Kwon, I. S. Lee, S. C. Lee, L. K. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Lubej, T. Luo, J. MacNaughton, M. Masuda, T. Matsuda, M. Merola, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, H. K. Moon, T. Mori, M. Mrvar, R. Mussa, E. Nakano, M. Nakao, T. Nanut, K. J. Nath, Z. Natkaniec, M. Nayak, M. Niiyama, S. Nishida, S. Ogawa, P. Pakhlov, G. Pakhlova, B. Pal, S. Pardi, C. W. Park, H. Park, S. Paul, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, V. Popov, A. Rostomyan, G. Russo, Y. Sakai, M. Salehi, S. Sandilya, L. Santelj, T. Sanuki, O. Schneider, G. Schnell, C. Schwanda, Y. Seino, V. Shebalin, T.-A. Shibata, J.-G. Shiu, B. Shwartz, A. Sokolov, E. Solovieva, M. Starič, J. F. Strube, M. Sumihama, T. Sumiyoshi, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, M. Uchida, T. Uglov, Y. Unno, S. Uno, C. Van Hulse, G. Varner, V. Vorobyev, A. Vossen, E. Waheed, B. Wang, C. H. Wang, M.-Z. Wang, P. Wang, X. L. Wang, M. Watanabe, Y. Watanabe, E. Widmann, E. Won, H. Ye, J. Yelton, C. Z. Yuan, Y. Yusa, S. Zakharov, Z. P. Zhang, V. Zhilich, V. Zhukova, V. Zhulanov
The European Physical Journal C 78 ( 3 ) 252 2018.3
Language：English Publishing type：Research paper (scientific journal)
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Production rates of hyperons and charmed baryons from e+ e− annihilation near s √s=10.52 GeV
T. Matsuda
Proceedings of Science 310 231 2018.3
Language：English Publishing type：Research paper (international conference proceedings)
DOI： 10.22323/1.310.0231
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Study of K0S pair production in single-tag two-photon collisions Reviewed
M. Masuda78, S. Uehara13,10, Y. Watanabe30, I. Adachi13,10, J. K. Ahn36, H. Aihara79, S. Al Said73,34, D. M. Asner62, H. Atmacan70, V. Aulchenko3,60, T. Aushev50, R. Ayad73, V. Babu74, I. Badhrees73,33, V. Bansal62, P. Behera20, M. Berger71, V. Bhardwaj16, B. Bhuyan18, J. Biswal29, A. Bondar3,60, G. Bonvicini84, A. Bozek57, M. Bračko45,29, D. Červenkov4, A. Chen54, B. G. Cheon11, K. Chilikin40,49, K. Cho35, Y. Choi72, S. Choudhury19, D. Cinabro84, T. Czank77, N. Dash17, S. Di Carlo84, Z. Doležal4, Z. Drásal4, D. Dutta74, S. Eidelman3,60, D. Epifanov3,60, J. E. Fast62, T. Ferber7, B. G. Fulsom62, R. Garg63, V. Gaur83, N. Gabyshev3,60, A. Garmash3,60, M. Gelb31, A. Giri19, P. Goldenzweig31, E. Guido27, J. Haba13,10, K. Hayasaka59, H. Hayashii53, M. T. Hedges12, W.-S. Hou56, T. Iijima52,51, K. Inami51, G. Inguglia7, A. Ishikawa77, R. Itoh13,10, M. Iwasaki61, Y. Iwasaki13, W. W. Jacobs21, I. Jaegle8, Y. Jin79, K. K. Joo5, T. Julius47, K. H. Kang38, G. Karyan7, T. Kawasaki59, H. Kichimi13, C. Kiesling46, D. Y. Kim69, H. J. Kim38, J. B. Kim36, K. T. Kim36, S. H. Kim11, P. Kodyš4, D. Kotchetkov12, P. Križan41,29, R. Kroeger25, P. Krokovny3,60, R. Kulasiri32, A. Kuzmin3,60, Y.-J. Kwon86, I. S. Lee11, S. C. Lee38, L. K. Li22, Y. Li83, L. Li Gioi46, J. Libby20, D. Liventsev83,13, M. Lubej29, T. Luo64, T. Matsuda48, D. Matvienko3,60, M. Merola26, K. Miyabayashi53, H. Miyata59, R. Mizuk40,49,50, G. B. Mohanty74, H. K. Moon36, T. Mori51, R. Mussa27, M. Nakao13,10, H. Nakazawa54, T. Nanut29, K. J. Nath18, Z. Natkaniec57, M. Nayak84,13, M. Niiyama37, N. K. Nisar64, S. Nishida13,10, S. Ogawa76, S. Okuno30, H. Ono58,59, Y. Onuki79, P. Pakhlov40,49, G. Pakhlova40,50, B. Pal6, H. Park38, S. Paul75, T. K. Pedlar43, R. Pestotnik29, L. E. Piilonen83, M. Ritter42, A. Rostomyan7, G. Russo26, Y. Sakai13,10, M. Salehi44,42, S. Sandilya6, L. Santelj13, T. Sanuki77, V. Savinov64, O. Schneider39, G. Schnell1,15, C. Schwanda23, R. Seidl66, Y. Seino59, K. Senyo85, O. Seon51, M. E. Sevior47, V. Shebalin3,60, C. P. Shen2, T.-A. Shibata80, N. Shimizu79, J.-G. Shiu56, B. Shwartz3,60, A. Sokolov24, E. Solovieva40,50, M. Starič29, J. F. Strube62, M. Sumihama9, T. Sumiyoshi81, M. Takizawa68,14,65, U. Tamponi27,82, K. Tanida28, F. Tenchini47, Y. Teramoto61, M. Uchida80, T. Uglov40,50, Y. Unno11, S. Uno13,10, P. Urquijo47, C. Van Hulse1, G. Varner12, A. Vinokurova3,60, V. Vorobyev3,60, A. Vossen21, B. Wang6, C. H. Wang55, M.-Z. Wang56, P. Wang22, X. L. Wang62,13, M. Watanabe59, E. Widmann71, E. Won36, H. Ye7, C. Z. Yuan22, Y. Yusa59, S. Zakharov40, Z. P. Zhang67, V. Zhilich3,60, V. Zhukova40,49, V. Zhulanov3,60, and A. Zupanc41,29 (Belle Collaboration)
Physical Review D 97 ( 5 ) 052003 2018.3
Language：English Publishing type：Research paper (scientific journal)
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Transverse-momentum-dependent multiplicities of charged hadrons in muon-deuteron deep inelastic scattering Reviewed
M. Aghasyan, M. G. Alexeev, et al.
Physical Review D 2018.2
Language：English Publishing type：Research paper (scientific journal)
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Measurement of branching fractions of hadronic decays of the Ω0c baryon Reviewed
J. Yelton7, I. Adachi15,11, H. Aihara79, S. Al Said73,35, D. M. Asner62, H. Atmacan69, V. Aulchenko3,60, T. Aushev51, R. Ayad73, T. Aziz74, V. Babu74, A. M. Bakich72, V. Bansal62, P. Behera22, M. Berger70, V. Bhardwaj18, J. Biswal31, A. Bobrov3,60, A. Bondar3,60, A. Bozek58, M. Bračko46,31, T. E. Browder14, D. Červenkov4, M.-C. Chang8, P. Chang57, V. Chekelian47, A. Chen55, B. G. Cheon13, K. Chilikin41,50, K. Cho36, S.-K. Choi12, Y. Choi71, S. Choudhury21, D. Cinabro84, T. Czank77, N. Dash19, S. Di Carlo84, Z. Doležal4, S. Eidelman3,60, J. E. Fast62, T. Ferber6, B. G. Fulsom62, R. Garg63, V. Gaur83, N. Gabyshev3,60, A. Garmash3,60, M. Gelb33, A. Giri21, P. Goldenzweig33, D. Greenwald75, Y. Guan23,15, E. Guido29, J. Haba15,11, T. Hara15,11, K. Hayasaka59, H. Hayashii54, W.-S. Hou57, T. Iijima53,52, K. Inami52, G. Inguglia6, A. Ishikawa77, R. Itoh15,11, M. Iwasaki61, Y. Iwasaki15, W. W. Jacobs23, H. B. Jeon39, Y. Jin79, D. Joffe34, T. Julius48, G. Karyan6, T. Kawasaki59, H. Kichimi15, C. Kiesling47, D. Y. Kim68, H. J. Kim39, J. B. Kim37, S. H. Kim13, Y. J. Kim36, K. Kinoshita5, P. Kodyš4, S. Korpar46,31, D. Kotchetkov14, P. Križan42,31, R. Kroeger27, P. Krokovny3,60, T. Kuhr43, R. Kulasiri34, T. Kumita81, A. Kuzmin3,60, Y.-J. Kwon85, K. Lalwani45, J. S. Lange9, I. S. Lee13, S. C. Lee39, L. K. Li24, Y. Li83, L. Li Gioi47, J. Libby22, D. Liventsev83,15, M. Lubej31, T. Luo64, M. Masuda78, T. Matsuda49, D. Matvienko3,60, M. Merola28, K. Miyabayashi54, H. Miyata59, R. Mizuk41,50,51, G. B. Mohanty74, H. K. Moon37, T. Mori52, R. Mussa29, E. Nakano61, M. Nakao15,11, T. Nanut31, K. J. Nath20, M. Nayak84,15, M. Niiyama38, N. K. Nisar64, S. Nishida15,11, S. Ogawa76, S. Okuno32, P. Pakhlov41,50, G. Pakhlova41,51, B. Pal5, S. Pardi28, C. W. Park71, H. Park39, S. Paul75, I. Pavelkin51, T. K. Pedlar44, R. Pestotnik31, L. E. Piilonen83, V. Popov51, M. Ritter43, G. Russo28, Y. Sakai15,11, S. Sandilya5, T. Sanuki77, V. Savinov64, O. Schneider40, G. Schnell1,17, C. Schwanda25, A. J. Schwartz5, Y. Seino59, M. E. Sevior48, V. Shebalin3,60, C. P. Shen2, T.-A. Shibata80, N. Shimizu79, J.-G. Shiu57, B. Shwartz3,60, J. B. Singh63, A. Sokolov26, E. Solovieva41,51, M. Starič31, J. F. Strube62, M. Sumihama10, T. Sumiyoshi81, K. Suzuki70, M. Takizawa67,16,65, U. Tamponi29,82, K. Tanida30, F. Tenchini48, M. Uchida80, T. Uglov41,51, Y. Unno13, S. Uno15,11, Y. Usov3,60, G. Varner14, V. Vorobyev3,60, A. Vossen23, E. Waheed48, C. H. Wang56, M.-Z. Wang57, P. Wang24, X. L. Wang62,15, Y. Watanabe32, E. Widmann70, E. Won37, H. Ye6, C. Z. Yuan24, Y. Yusa59, S. Zakharov41, Z. P. Zhang66, V. Zhilich3,60, V. Zhukova41,50, V. Zhulanov3,60, and A. Zupanc42,31 (The Belle Collaboration)
Physical Review D 97 ( 3 ) 032001 2018.2
Language：English Publishing type：Research paper (scientific journal)
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Measurements of the absolute branching fractions of B+→Xc ¯ cK+ and B+→ ¯ D(*)0π+ at Belle Reviewed
Y. Kato53, T. Iijima53,52, I. Adachi15,11, H. Aihara79, S. Al Said72,35, D. M. Asner63, V. Aulchenko3,61, T. Aushev51, R. Ayad72, V. Babu73, I. Badhrees72,34, A. M. Bakich71, V. Bansal63, E. Barberio48, P. Behera21, V. Bhardwaj18, B. Bhuyan20, J. Biswal30, A. Bozek58, M. Bračko46,30, T. E. Browder14, D. Červenkov4, P. Chang57, R. Cheaib26, V. Chekelian47, A. Chen55, B. G. Cheon13, K. Chilikin41,50, K. Cho36, S.-K. Choi12, Y. Choi70, D. Cinabro84, T. Czank77, N. Dash19, S. Di Carlo84, Z. Doležal4, Z. Drásal4, D. Dutta73, S. Eidelman3,61, D. Epifanov3,61, J. E. Fast63, T. Ferber7, B. G. Fulsom63, V. Gaur83, N. Gabyshev3,61, A. Garmash3,61, M. Gelb32, P. Goldenzweig32, D. Greenwald75, E. Guido28, J. Haba15,11, K. Hayasaka60, H. Hayashii54, M. T. Hedges14, S. Hirose52, W.-S. Hou57, K. Inami52, G. Inguglia7, A. Ishikawa77, R. Itoh15,11, M. Iwasaki62, Y. Iwasaki15, W. W. Jacobs22, I. Jaegle8, H. B. Jeon39, Y. Jin79, K. K. Joo5, T. Julius48, A. B. Kaliyar21, K. H. Kang39, G. Karyan7, T. Kawasaki60, H. Kichimi15, C. Kiesling47, D. Y. Kim68, J. B. Kim37, S. H. Kim13, Y. J. Kim36, K. Kinoshita6, P. Kodyš4, S. Korpar46,30, D. Kotchetkov14, P. Križan42,30, R. Kroeger26, P. Krokovny3,61, T. Kuhr43, R. Kulasiri33, A. Kuzmin3,61, Y.-J. Kwon86, J. S. Lange9, I. S. Lee13, C. H. Li48, L. Li66, L. Li Gioi47, J. Libby21, D. Liventsev83,15, M. Lubej30, T. Luo64, M. Masuda78, T. Matsuda49, M. Merola27, K. Miyabayashi54, H. Miyata60, R. Mizuk41,50,51, G. B. Mohanty73, H. K. Moon37, T. Mori52, R. Mussa28, E. Nakano62, M. Nakao15,11, T. Nanut30, K. J. Nath20, Z. Natkaniec58, M. Nayak84,15, M. Niiyama38, N. K. Nisar64, S. Nishida15,11, S. Ogawa76, S. Okuno31, H. Ono59,60, P. Pakhlov41,50, G. Pakhlova41,51, B. Pal6, C.-S. Park86, C. W. Park70, H. Park39, S. Paul75, T. K. Pedlar44, R. Pestotnik30, L. E. Piilonen83, M. Ritter43, A. Rostomyan7, Y. Sakai15,11, M. Salehi45,43, S. Sandilya6, Y. Sato52, V. Savinov64, O. Schneider40, G. Schnell1,17, C. Schwanda24, A. J. Schwartz6, Y. Seino60, K. Senyo85, M. E. Sevior48, V. Shebalin3,61, C. P. Shen2, T.-A. Shibata80, J.-G. Shiu57, F. Simon47,74, A. Sokolov25, E. Solovieva41,51, M. Starič30, J. F. Strube63, M. Sumihama10, K. Sumisawa15,11, T. Sumiyoshi81, M. Takizawa67,16,65, U. Tamponi28,82, K. Tanida29, F. Tenchini48, K. Trabelsi15,11, M. Uchida80, S. Uehara15,11, T. Uglov41,51, Y. Unno13, S. Uno15,11, P. Urquijo48, Y. Usov3,61, C. Van Hulse1, G. Varner14, K. E. Varvell71, V. Vorobyev3,61, C. H. Wang56, M.-Z. Wang57, P. Wang23, M. Watanabe60, S. Watanuki77, E. Widmann69, E. Won37, Y. Yamashita59, H. Ye7, J. Yelton8, C. Z. Yuan23, Y. Yusa60, Z. P. Zhang66, V. Zhilich3,61, V. Zhukova41,50, V. Zhulanov3,61, and A. Zupanc42,30 (The Belle Collaboration)
Physical Review D 97 ( 1 ) 012005 2018.1
Language：English Publishing type：Research paper (scientific journal)
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V. Zhukova37,46, G. Pakhlova37,47, P. Pakhlov37,46, I. Adachi13,9, H. Aihara73, S. Al Said66,31, D. M. Asner58, V. Aulchenko3,56, T. Aushev47, R. Ayad66, V. Babu67, I. Badhrees66,30, P. Behera18, B. Bhuyan17, J. Biswal26, A. Bobrov3,56, G. Bonvicini77, A. Bozek53, M. Bračko42,26, T. E. Browder12, D. Červenkov4, V. Chekelian43, A. Chen50, B. G. Cheon11, K. Chilikin37,46, K. Cho32, S.-K. Choi10, Y. Choi65, D. Cinabro77, T. Czank71, N. Dash16, S. Di Carlo77, Z. Doležal4, Z. Drásal4, S. Eidelman3,56, H. Farhat77, J. E. Fast58, T. Ferber6, B. G. Fulsom58, V. Gaur76, A. Garmash3,56, R. Gillard77, P. Goldenzweig28, O. Grzymkowska53, E. Guido24, J. Haba13,9, K. Hayasaka55, H. Hayashii49, M. T. Hedges12, W.-S. Hou52, K. Inami48, G. Inguglia6, A. Ishikawa71, R. Itoh13,9, M. Iwasaki57, Y. Iwasaki13, W. W. Jacobs19, I. Jaegle7, H. B. Jeon35, S. Jia2, Y. Jin73, T. Julius44, K. H. Kang35, G. Karyan6, C. Kiesling43, D. Y. Kim64, K. T. Kim33, S. H. Kim11, S. Korpar42,26, D. Kotchetkov12, P. Križan38,26, P. Krokovny3,56, R. Kulasiri29, Y.-J. Kwon79, J. S. Lange8, L. Li61, L. Li Gioi43, D. Liventsev76,13, T. Luo59, M. Masuda72, T. Matsuda45, M. Merola23, K. Miyabayashi49, H. Miyata55, R. Mizuk37,46,47, G. B. Mohanty67, H. K. Moon33, T. Mori48, M. Nakao13,9, T. Nanut26, K. J. Nath17, M. Nayak77,13, M. Niiyama34, N. K. Nisar59, S. Nishida13,9, S. Ogawa70, S. L. Olsen62, H. Ono54,55, B. Pal5, C.-S. Park79, C. W. Park65, S. Paul69, I. Pavelkin47, T. K. Pedlar40, R. Pestotnik26, L. E. Piilonen76, V. Popov47, C. Pulvermacher13, A. Rostomyan6, Y. Sakai13,9, M. Salehi41,39, S. Sandilya5, T. Sanuki71, O. Schneider36, G. Schnell1,15, C. Schwanda21, Y. Seino55, K. Senyo78, M. E. Sevior44, V. Shebalin3,56, T.-A. Shibata74, J.-G. Shiu52, B. Shwartz3,56, F. Simon43,68, A. Sokolov22, E. Solovieva37,47, M. Starič26, T. Sumiyoshi75, M. Takizawa63,14,60, K. Tanida25, F. Tenchini44, K. Trabelsi13,9, M. Uchida74, S. Uehara13,9, T. Uglov37,47, Y. Unno11, S. Uno13,9, Y. Usov3,56, C. Van Hulse1, G. Varner12, A. Vinokurova3,56, V. Vorobyev3,56, E. Waheed44, C. H. Wang51, M.-Z. Wang52, P. Wang20, X. L. Wang58,13, Y. Watanabe27, S. Watanuki71, E. Won33, Y. Yamashita54, Y. Yusa55, S. Zakharov37, Z. P. Zhang61, V. Zhilich3,56, V. Zhulanov3,56, and A. Zupanc38,26 (Belle Collaboration)
Physical Review D 97 ( 1 ) 012002 2018.1
Language：English Publishing type：Research paper (scientific journal)
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S. Hirose52, T. Iijima53,52, I. Adachi14,10, K. Adamczyk58, H. Aihara81, S. Al Said75,36, D. M. Asner63, H. Atmacan71, T. Aushev51, R. Ayad75, T. Aziz76, V. Babu76, I. Badhrees75,35, A. M. Bakich74, V. Bansal63, M. Berger72, V. Bhardwaj17, B. Bhuyan19, J. Biswal30, A. Bondar2,61, A. Bozek58, M. Bračko46,30, T. E. Browder13, D. Červenkov3, M.-C. Chang7, P. Chang57, V. Chekelian47, A. Chen55, B. G. Cheon12, K. Chilikin42,50, K. Cho37, S.-K. Choi11, Y. Choi73, S. Choudhury20, D. Cinabro87, T. Czank80, N. Dash18, S. Di Carlo87, Z. Doležal3, D. Dutta76, S. Eidelman2,61, J. E. Fast63, T. Ferber5, B. G. Fulsom63, R. Garg64, V. Gaur86, N. Gabyshev2,61, A. Garmash2,61, M. Gelb32, A. Giri20, P. Goldenzweig32, B. Golob43,30, Y. Guan22,14, E. Guido28, J. Haba14,10, K. Hara14, K. Hayasaka60, H. Hayashii54, M. T. Hedges13, T. Higuchi33, W.-S. Hou57, C.-L. Hsu48, K. Inami52, G. Inguglia5, A. Ishikawa80, R. Itoh14,10, M. Iwasaki62, I. Jaegle6, H. B. Jeon40, Y. Jin81, T. Julius48, K. H. Kang40, G. Karyan5, T. Kawasaki60, D. Y. Kim70, J. B. Kim38, S. H. Kim12, Y. J. Kim37, K. Kinoshita4, P. Kodyš3, S. Korpar46,30, D. Kotchetkov13, P. Križan43,30, R. Kroeger26, P. Krokovny2,61, T. Kuhr44, R. Kulasiri34, R. Kumar66, A. Kuzmin2,61, Y.-J. Kwon89, J. S. Lange8, I. S. Lee12, L. K. Li23, Y. Li86, L. Li Gioi47, J. Libby21, D. Liventsev86,14, M. Lubej30, T. Matsuda49, K. Miyabayashi54, H. Miyata60, G. B. Mohanty76, S. Mohanty76,85, H. K. Moon38, T. Mori52, R. Mussa28, K. R. Nakamura14, M. Nakao14,10, T. Nanut30, K. J. Nath19, Z. Natkaniec58, M. Niiyama39, N. K. Nisar65, S. Nishida14,10, S. Ogawa79, S. Okuno31, H. Ono59,60, B. Pal4, S. Pardi27, C. W. Park73, H. Park40, S. Paul78, R. Pestotnik30, L. E. Piilonen86, V. Popov51, M. Ritter44, A. Rostomyan5, M. Rozanska58, Y. Sakai14,10, M. Salehi45,44, S. Sandilya4, Y. Sato52, O. Schneider41, G. Schnell1,16, C. Schwanda24, A. J. Schwartz4, Y. Seino60, K. Senyo88, M. E. Sevior48, V. Shebalin2,61, T.-A. Shibata82, N. Shimizu81, J.-G. Shiu57, F. Simon47,77, A. Sokolov25, E. Solovieva42,51, M. Starič30, J. F. Strube63, J. Stypula58, M. Sumihama9, K. Sumisawa14,10, T. Sumiyoshi83, M. Takizawa69,15,67, U. Tamponi28,84, K. Tanida29, F. Tenchini48, K. Trabelsi14,10, M. Uchida82, T. Uglov42,51, S. Uno14,10, P. Urquijo48, C. Van Hulse1, G. Varner13, K. E. Varvell74, V. Vorobyev2,61, A. Vossen22, C. H. Wang56, M.-Z. Wang57, P. Wang23, X. L. Wang63,14, S. Wehle5, E. Widmann72, E. Won38, H. Yamamoto80, Y. Yamashita59, H. Ye5, C. Z. Yuan23, Y. Yusa60, S. Zakharov42, Z. P. Zhang68, V. Zhilich2,61, V. Zhukova42,50, V. Zhulanov2,61, and A. Zupanc43,30 (The Belle Collaboration)
Physical Review D 97 ( 1 ) 012004 2018.1
Language：English Publishing type：Research paper (scientific journal)
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Search for light tetraquark states in Υ(1S) Υ(1S) and Υ(2S) Υ(2S) decays Reviewed
S. Jia2, C. P. Shen2, C. Z. Yuan25, I. Adachi16,12, J. K. Ahn39, H. Aihara82, S. Al Said76,37, D. M. Asner64, H. Atmacan72, T. Aushev52, R. Ayad76, V. Babu77, I. Badhrees76,36, S. Bahinipati20, A. M. Bakich75, V. Bansal64, P. Behera23, M. Berger73, V. Bhardwaj19, B. Bhuyan21, J. Biswal32, G. Bonvicini87, A. Bozek59, M. Bračko47,32, T. E. Browder15, D. Červenkov4, M.-C. Chang9, V. Chekelian48, A. Chen56, B. G. Cheon14, K. Chilikin43,51, K. Cho38, S.-K. Choi13, Y. Choi74, D. Cinabro87, T. Czank80, N. Dash20, S. Di Carlo87, Z. Doležal4, D. Dutta77, S. Eidelman3,62, D. Epifanov3,62, J. E. Fast64, T. Ferber7, B. G. Fulsom64, R. Garg65, V. Gaur86, N. Gabyshev3,62, A. Garmash3,62, M. Gelb34, A. Giri22, P. Goldenzweig34, O. Grzymkowska59, E. Guido30, J. Haba16,12, T. Hara16,12, K. Hayasaka61, H. Hayashii55, M. T. Hedges15, W.-S. Hou58, T. Iijima54,53, K. Inami53, G. Inguglia7, A. Ishikawa80, R. Itoh16,12, M. Iwasaki63, Y. Iwasaki16, W. W. Jacobs24, I. Jaegle8, Y. Jin82, D. Joffe35, K. K. Joo5, T. Julius49, A. B. Kaliyar23, G. Karyan7, T. Kawasaki61, H. Kichimi16, C. Kiesling48, D. Y. Kim71, H. J. Kim41, J. B. Kim39, K. T. Kim39, S. H. Kim14, P. Kodyš4, S. Korpar47,32, D. Kotchetkov15, P. Križan44,32, R. Kroeger28, P. Krokovny3,62, R. Kulasiri35, T. Kumita84, A. Kuzmin3,62, Y.-J. Kwon89, J. S. Lange10, I. S. Lee14, S. C. Lee41, L. K. Li25, Y. Li86, L. Li Gioi48, J. Libby23, D. Liventsev86,16, M. Lubej32, T. Luo66, M. Masuda81, T. Matsuda50, D. Matvienko3,62, M. Merola29, K. Miyabayashi55, H. Miyata61, R. Mizuk43,51,52, H. K. Moon39, T. Mori53, R. Mussa30, M. Nakao16,12, T. Nanut32, K. J. Nath21, Z. Natkaniec59, M. Nayak87,16, M. Niiyama40, N. K. Nisar66, S. Nishida16,12, S. Ogawa79, S. Okuno33, S. L. Olsen69, H. Ono60,61, Y. Onuki82, P. Pakhlov43,51, G. Pakhlova43,52, B. Pal6, S. Pardi29, C. W. Park74, H. Park41, S. Paul78, I. Pavelkin52, R. Pestotnik32, L. E. Piilonen86, M. Ritter45, A. Rostomyan7, G. Russo29, Y. Sakai16,12, M. Salehi46,45, S. Sandilya6, L. Santelj16, T. Sanuki80, V. Savinov66, O. Schneider42, G. Schnell1,18, C. Schwanda26, Y. Seino61, K. Senyo88, O. Seon53, M. E. Sevior49, V. Shebalin3,62, T.-A. Shibata83, N. Shimizu82, J.-G. Shiu58, B. Shwartz3,62, J. B. Singh65, A. Sokolov27, E. Solovieva43,52, M. Starič32, J. Stypula59, M. Sumihama11, T. Sumiyoshi84, M. Takizawa70,17,67, U. Tamponi30,85, K. Tanida31, F. Tenchini49, M. Uchida83, T. Uglov43,52, Y. Unno14, S. Uno16,12, P. Urquijo49, Y. Usov3,62, C. Van Hulse1, G. Varner15, A. Vossen24, B. Wang6, C. H. Wang57, M.-Z. Wang58, P. Wang25, X. L. Wang64,16, M. Watanabe61, Y. Watanabe33, E. Widmann73, E. Won39, Y. Yamashita60, H. Ye7, Y. Yusa61, S. Zakharov43, Z. P. Zhang68, V. Zhilich3,62, V. Zhukova43,51, V. Zhulanov3,62, and A. Zupanc44,32 (Belle Collaboration)
Physical Review D 96 ( 11 ) - 112002 2017.12
Language：English Publishing type：Research paper (scientific journal)
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Measurement of the decays B→ηℓν ℓ and B→η′ℓνℓ in fully reconstructed events at Belle Reviewed
C. Beleño, J. Dingfelder, P. Urquijo, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, R. Ayad, V. Babu, I. Badhrees, A. M. Bakich, V. Bansal, P. Behera, B. Bhuyan, J. Biswal, A. Bobrov, M. Bračko, T. E. Browder, D. Červenkov, A. Chen, B. G. Cheon, R. Chistov, K. Cho, S.-K. Choi, Y. Choi, D. Cinabro, N. Dash, S. Di Carlo, Z. Doležal, S. Eidelman, H. Farhat, J. E. Fast, T. Ferber, A. Frey, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, R. Gillard, P. Goldenzweig, T. Hara, H. Hayashii, M. T. Hedges, W.-S. Hou, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, Y. Iwasaki, H. B. Jeon, Y. Jin, D. Joffe, K. K. Joo, K. H. Kang, G. Karyan, D. Y. Kim, J. B. Kim, K. T. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. Križan, P. Krokovny, R. Kulasiri, I. S. Lee, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Lubej, T. Luo, M. Masuda, T. Matsuda, D. Matvienko, K. Miyabayashi, H. Miyata, H. K. Moon, T. Mori, E. Nakano, M. Nakao, T. Nanut, K. J. Nath, M. Nayak, S. Nishida, S. Ogawa, S. Okuno, H. Ono, B. Pal, C.-S. Park, C. W. Park, H. Park, T. K. Pedlar, R. Pestotnik, L. E. Piilonen, M. Ritter, Y. Sakai, M. Salehi, S. Sandilya, T. Sanuki, O. Schneider, G. Schnell, C. Schwanda, Y. Seino, K. Senyo, O. Seon, M. E. Sevior, V. Shebalin, T.-A. Shibata, J.-G. Shiu, F. Simon, E. Solovieva, M. Starič, T. Sumiyoshi, M. Takizawa, U. Tamponi, K. Tanida, F. Tenchini, M. Uchida, T. Uglov, Y. Unno, S. Uno, Y. Usov, C. Van Hulse, G. Varner, K. E. Varvell, A. Vinokurova, V. Vorobyev, C. H. Wang, M.-Z. Wang, P. Wang, Y. Watanabe, E. Widmann, E. Won, Y. Yamashita, H. Ye, J. Yelton, Y. Yook, Z. P. Zhang, V. Zhilich, V. Zhukova, V. Zhulanov and A. Zupanc(Belle Collaboration)
Physical Review D 96 091102 2017.11
Language：English Publishing type：Research paper (scientific journal)
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Evidence for Isospin Violation and Measurement of CP CP Asymmetries in B→K∗ (892)γ B→K∗(892)γ Reviewed
T. Horiguchi73, A. Ishikawa73, H. Yamamoto73, I. Adachi13,10, H. Aihara75, S. Al Said68,33, D. M. Asner59, V. Aulchenko3,57, T. Aushev47, R. Ayad68, V. Babu69, I. Badhrees68,32, A. M. Bakich67, V. Bansal59, P. Behera19, V. Bhardwaj16, B. Bhuyan18, J. Biswal27, A. Bobrov3,57, G. Bonvicini81, A. Bozek54, M. Bračko42,27, T. E. Browder12, D. Červenkov4, V. Chekelian43, A. Chen51, B. G. Cheon11, K. Chilikin38,46, K. Cho34, Y. Choi66, D. Cinabro81, T. Czank73, N. Dash17, S. Di Carlo81, Z. Doležal4, Z. Drásal4, D. Dutta69, S. Eidelman3,57, D. Epifanov3,57, H. Farhat81, J. E. Fast59, T. Ferber7, B. G. Fulsom59, V. Gaur80, N. Gabyshev3,57, A. Garmash3,57, M. Gelb29, R. Gillard81, P. Goldenzweig29, B. Golob39,27, Y. Guan20,13, E. Guido25, J. Haba13,10, T. Hara13,10, K. Hayasaka56, H. Hayashii50, M. T. Hedges12, T. Higuchi30, S. Hirose48, W.-S. Hou53, T. Iijima49,48, K. Inami48, G. Inguglia7, R. Itoh13,10, Y. Iwasaki13, W. W. Jacobs20, I. Jaegle8, H. B. Jeon36, S. Jia2, Y. Jin75, D. Joffe31, K. K. Joo5, T. Julius44, K. H. Kang36, T. Kawasaki56, D. Y. Kim65, J. B. Kim35, K. T. Kim35, M. J. Kim36, S. H. Kim11, Y. J. Kim34, K. Kinoshita6, P. Kodyš4, S. Korpar42,27, D. Kotchetkov12, P. Križan39,27, P. Krokovny3,57, T. Kuhr40, R. Kulasiri31, R. Kumar61, T. Kumita77, A. Kuzmin3,57, Y.-J. Kwon83, J. S. Lange9, C. H. Li44, L. Li63, L. Li Gioi43, J. Libby19, D. Liventsev80,13, M. Lubej27, T. Luo60, M. Masuda74, T. Matsuda45, D. Matvienko3,57, M. Merola24, K. Miyabayashi50, H. Miyata56, R. Mizuk38,46,47, G. B. Mohanty69, S. Mohanty69,79, H. K. Moon35, T. Mori48, R. Mussa25, E. Nakano58, M. Nakao13,10, T. Nanut27, K. J. Nath18, Z. Natkaniec54, M. Nayak81,13, N. K. Nisar60, S. Nishida13,10, S. Ogawa72, S. Okuno28, H. Ono55,56, P. Pakhlov38,46, G. Pakhlova38,47, B. Pal6, S. Pardi24, C.-S. Park83, H. Park36, S. Paul71, T. K. Pedlar41, R. Pestotnik27, L. E. Piilonen80, K. Prasanth19, C. Pulvermacher13, J. Rauch71, A. Rostomyan7, Y. Sakai13,10, S. Sandilya6, L. Santelj13, V. Savinov60, O. Schneider37, G. Schnell1,15, C. Schwanda22, A. J. Schwartz6, Y. Seino56, K. Senyo82, I. S. Seong12, M. E. Sevior44, V. Shebalin3,57, C. P. Shen2, T.-A. Shibata76, J.-G. Shiu53, F. Simon43,70, A. Sokolov23, E. Solovieva38,47, M. Starič27, J. F. Strube59, K. Sumisawa13,10, T. Sumiyoshi77, M. Takizawa64,14,62, U. Tamponi25,78, K. Tanida26, F. Tenchini44, K. Trabelsi13,10, M. Uchida76, T. Uglov38,47, Y. Unno11, S. Uno13,10, P. Urquijo44, Y. Ushiroda13,10, Y. Usov3,57, C. Van Hulse1, G. Varner12, A. Vinokurova3,57, V. Vorobyev3,57, A. Vossen20, C. H. Wang52, M.-Z. Wang53, P. Wang21, Y. Watanabe28, S. Watanuki73, T. Weber12, E. Widmann84, E. Won35, Y. Yamashita55, H. Ye7, Z. P. Zhang63, V. Zhilich3,57, V. Zhukova46, V. Zhulanov3,57, and A. Zupanc39,27 (Belle Collaboration)
Physical Review Letters 119 ( 19 ) 191802 2017.11
Language：English Publishing type：Research paper (scientific journal)
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First Measurement of Transverse-Spin-Dependent Azimuthal Asymmetries in the Drell-Yan Process Reviewed
Aghasyan M., Akhunzyanov R., Alexeev G., Alexeev M., Amoroso A., Andrieux V., Anfimov N., Anosov V., Antoshkin A., Augsten K., Augustyniak W., Austregesilo A., Azevedo C., Badełek B., Balestra F., Ball M., Barth J., Beck R., Bedfer Y., Bernhard J., Bicker K., Bielert E., Birsa R., Bodlak M., Bordalo P., Bradamante F., Bressan A., Büchele M., Chang W., Chatterjee C., Chiosso M., Choi I., Chung S., Cicuttin A., Crespo M., Dalla Torre S., Dasgupta S., Dasgupta S., Denisov O., Dhara L., Donskov S., Doshita N., Dreisbach C., Dünnweber W., Dziewiecki M., Efremov A., Eversheim P., Faessler M., Ferrero A., Finger M., Finger M., Fischer H., Franco C., Du Fresne Von Hohenesche N., Friedrich J., Frolov V., Fuchey E., Gautheron F., Gavrichtchouk O., Gerassimov S., Giarra J., Giordano F., Gnesi I., Gorzellik M., Grasso A., Grosse Perdekamp M., Grube B., Grussenmeyer T., Guskov A., Hahne D., Hamar G., Von Harrach D., Heinsius F., Heitz R., Herrmann F., Horikawa N., D'Hose N., Hsieh C.
Physical Review Letters 119 ( 11 ) 2017.9
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Physical Review Letters
© 2017 authors. Published by the American Physical Society. The first measurement of transverse-spin-dependent azimuthal asymmetries in the pion-induced Drell-Yan (DY) process is reported. We use the CERN SPS 190 GeV/c π- beam and a transversely polarized ammonia target. Three azimuthal asymmetries giving access to different transverse-momentum-dependent (TMD) parton distribution functions (PDFs) are extracted using dimuon events with invariant mass between 4.3 GeV/c2 and 8.5 GeV/c2. Within the experimental uncertainties, the observed sign of the Sivers asymmetry is found to be consistent with the fundamental prediction of quantum chromodynamics (QCD) that the Sivers TMD PDFs extracted from DY have a sign opposite to the one extracted from semi-inclusive deep-inelastic scattering (SIDIS) data. We present two other asymmetries originating from the pion Boer-Mulders TMD PDFs convoluted with either the nucleon transversity or pretzelosity TMD PDFs. A recent COMPASS SIDIS measurement was obtained at a hard scale comparable to that of these DY results. This opens the way for possible tests of fundamental QCD universality predictions.
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First measurement of the Sivers asymmetry for gluons using SIDIS data Reviewed
Adolph C., Aghasyan M., Akhunzyanov R., Alexeev M., Alexeev G., Amoroso A., Andrieux V., Anfimov N., Anosov V., Antoshkin A., Augsten K., Augustyniak W., Austregesilo A., Azevedo C., Badełek B., Balestra F., Ball M., Barth J., Beck R., Bedfer Y., Bernhard J., Bicker K., Bielert E., Birsa R., Bodlak M., Bordalo P., Bradamante F., Braun C., Bressan A., Büchele M., Chang W., Chatterjee C., Chiosso M., Choi I., Chung S., Cicuttin A., Crespo M., Curiel Q., Dalla Torre S., Dasgupta S., Dasgupta S., Denisov O., Dhara L., Donskov S., Doshita N., Dreisbach C., Duic V., Quintans C., Dziewiecki M., Efremov A., Eversheim P., Eyrich W., Ramos S., Ferrero A., Finger M., Finger M., Fischer H., Franco C., du Fresne von Hohenesche N., Friedrich J., Frolov V., Fuchey E., Gautheron F., Gavrichtchouk O., Gerassimov S., Giarra J., Giordano F., Gnesi I., Gorzellik M., Grabmüller S., Grasso A., Grosse Perdekamp M., Grube B., Grussenmeyer T., Guskov A., Haas F., Hahne D., Hamar G., von Harrach D., Heinsius F., Heitz R.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 772 854 - 864 2017.9
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
© 2017 The Author(s) The Sivers function describes the correlation between the transverse spin of a nucleon and the transverse motion of its partons. For quarks, it was studied in previous measurements of the azimuthal asymmetry of hadrons produced in semi-inclusive deep inelastic scattering of leptons off transversely polarised nucleon targets, and it was found to be non-zero. In this letter the evaluation of the Sivers asymmetry for gluons is presented. The contribution of the photon–gluon fusion subprocess is enhanced by requiring two high transverse-momentum hadrons. The analysis method is based on a Monte Carlo simulation that includes three hard processes: photon–gluon fusion, QCD Compton scattering and the leading-order virtual-photon absorption process. The Sivers asymmetries of the three processes are simultaneously extracted using the LEPTO event generator and a neural network approach. The method is applied to samples of events containing at least two hadrons with large transverse momentum from the COMPASS data taken with a 160 GeV/c muon beam scattered off transversely polarised deuterons and protons. With a significance of about two standard deviations, a negative value is obtained for the gluon Sivers asymmetry. The result of a similar analysis for a Collins-like asymmetry for gluons is consistent with zero.
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Study of η and dipion transitions in Upsilon (4S) decays to lower bottomonia Reviewed
Guido E., Mussa R., Tamponi U., Adachi I., Aihara H., Al Said S., Asner D., Aulchenko V., Aushev T., Ayad R., Badhrees I., Bakich A., Bansal V., Behera P., Bhardwaj V., Bhuyan B., Biswal J., Bobrov A., Bondar A., Bozek A., Bračko M., Browder T., Červenkov D., Chekelian V., Chen A., Cheon B., Chilikin K., Cho K., Choi S., Choi Y., Cinabro D., Dash N., Di Carlo S., DoleŽal Z., Drásal Z., Eidelman S., Epifanov D., Farhat H., Fast J., Ferber T., Fulsom B., Gaur V., Gabyshev N., Garmash A., Gelb M., Gillard R., Goldenzweig P., Haba J., Hara T., Hayasaka K., Hayashii H., Hedges M., Hou W., Iijima T., Inami K., Inguglia G., Ishikawa A., Itoh R., Iwasaki Y., Jacobs W., Jaegle I., Jeon H., Jia S., Jin Y., Joffe D., Joo K., Julius T., Kang K., Karyan G., Kawasaki T., Kim D., Kim J., Kim K., Kim M., Kim S., Kim Y., Kinoshita K., Kodyš P., Korpar S., Kotchetkov D., KriŽan P.
Physical Review D 96 ( 5 ) 2017.9
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review D
© 2017 American Physical Society. We study hadronic transitions between bottomonium states using 496 fb-1 data collected at the ?(4S) resonance with the Belle detector at the KEKB asymmetric energy e+e-collider. We measure B(?(4S)→π+π(1S))=(8.2±0.5(stat)±0.4(syst))×10-5, B(?(4S)→π+π(2S))=(7.9±1.0(stat)±0.4(syst))×10-5, and B(?(4S)→η?(1S))=(1.70±0.23(stat)±0.08(syst))×10-4. We measure the ratio of branching fractions R=B(?(4S)→η?(1S))/B(?(4S)→π+π(1S))=2.07±0.30(stat)±0.11(syst). We search for the decay ?(1D31,2)→η?(1S), but do not find significant evidence for such a transition. We also measure the initial-state radiation production cross sections of the ?(2S,3S) resonances and we find values compatible with the expected ones. Finally, the analysis of the ?(4S)→π+π(1S) events shows indications for a resonant contribution due to the f0(980) meson.
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Measurement of the branching fraction and CP B0→π0π0 decays, and an improved constraint on ϕ2 Reviewed
Authors & Affiliations T. Julius43, M. E. Sevior43, G. B. Mohanty66, I. Adachi14,11, H. Aihara70, S. Al Said65,32, D. M. Asner58, V. Aulchenko3,56, T. Aushev46, R. Ayad65, V. Babu66, I. Badhrees65,31, A. M. Bakich64, V. Bansal58, E. Barberio43, M. Barrett13, M. Berger62, V. Bhardwaj16, B. Bhuyan18, J. Biswal27, T. Bloomfield43, A. Bobrov3,56, A. Bondar3,56, G. Bonvicini75, A. Bozek53, M. Bračko41,27, T. E. Browder13, D. Červenkov4, M.-C. Chang9, Y. Chao52, V. Chekelian42, A. Chen50, B. G. Cheon12, K. Chilikin37,45, K. Cho33, Y. Choi63, D. Cinabro75, N. Dash17, S. Di Carlo75, Z. Doležal4, D. Dossett43, Z. Drásal4, D. Dutta66, S. Eidelman3,56, H. Farhat75, J. E. Fast58, T. Ferber7, B. G. Fulsom58, V. Gaur74, N. Gabyshev3,56, A. Garmash3,56, R. Gillard75, P. Goldenzweig29, J. Haba14,11, T. Hara14,11, K. Hayasaka55, H. Hayashii49, W.-S. Hou52, C.-L. Hsu43, T. Iijima48,47, K. Inami47, A. Ishikawa68, R. Itoh14,11, Y. Iwasaki14, W. W. Jacobs20, I. Jaegle8, Y. Jin70, D. Joffe30, K. K. Joo5, J. Kahn39, G. Karyan7, P. Katrenko46,37, T. Kawasaki55, C. Kiesling42, D. Y. Kim61, H. J. Kim35, J. B. Kim34, K. T. Kim34, M. J. Kim35, S. H. Kim12, Y. J. Kim33, K. Kinoshita6, P. Kodyš4, S. Korpar41,27, D. Kotchetkov13, P. Križan38,27, P. Krokovny3,56, J. F. Krohn43, T. Kuhr39, R. Kulasiri30, A. Kuzmin3,56, Y.-J. Kwon77, J. S. Lange10, I. S. Lee12, C. H. Li43, L. Li60, Y. Li74, L. Li Gioi42, J. Libby19, D. Liventsev74,14, T. Luo59, J. MacNaughton14, M. Masuda69, T. Matsuda44, M. Merola24, K. Miyabayashi49, H. Miyata55, R. Mizuk37,45,46, H. K. Moon34, T. Mori47, R. Mussa25, E. Nakano57, M. Nakao14,11, T. Nanut27, K. J. Nath18, Z. Natkaniec53, M. Nayak75,14, N. K. Nisar59, S. Nishida14,11, S. Ogawa67, H. Ono54,55, P. Pakhlov37,45, G. Pakhlova37,46, B. Pal6, S. Pardi24, C.-S. Park77, H. Park35, L. Pesántez2, R. Pestotnik27, L. E. Piilonen74, C. Pulvermacher14, M. Ritter39, H. Sahoo13, Y. Sakai14,11, M. Salehi40,39, S. Sandilya6, L. Santelj14, T. Sanuki68, Y. Sato47, V. Savinov59, O. Schneider36, G. Schnell1,15, C. Schwanda22, A. J. Schwartz6, Y. Seino55, K. Senyo76, V. Shebalin3,56, T.-A. Shibata71, J.-G. Shiu52, B. Shwartz3,56, A. Sokolov23, E. Solovieva37,46, M. Starič27, T. Sumiyoshi72, U. Tamponi25,73, K. Tanida26, F. Tenchini43, K. Trabelsi14,11, M. Uchida71, S. Uehara14,11, T. Uglov37,46, Y. Unno12, S. Uno14,11, P. Urquijo43, Y. Usov3,56, C. Van Hulse1, G. Varner13, K. E. Varvell64, A. Vossen20, E. Waheed43, C. H. Wang51, M.-Z. Wang52, P. Wang21, M. Watanabe55, Y. Watanabe28, E. Widmann62, K. M. Williams74, E. Won34, Y. Yamashita54, H. Ye7, C. Z. Yuan21, Y. Yusa55, Z. P. Zhang60, V. Zhilich3,56, V. Zhulanov3,56, and A. Zupanc38,27 (Belle Collaboration)
Physical Review D 96 ( 3 ) 032007 2017.8
Language：English Publishing type：Research paper (scientific journal)
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R. Seidl63, I. Adachi14,10, H. Aihara76, S. Al Said70,33, D. M. Asner60, T. Aushev48, R. Ayad70, I. Badhrees70,32, A. M. Bakich69, V. Bansal60, P. Behera20, V. Bhardwaj17, B. Bhuyan19, J. Biswal28, A. Bobrov3,58, A. Bozek55, M. Bračko43,28, T. E. Browder13, D. Červenkov4, V. Chekelian44, A. Chen52, B. G. Cheon12, K. Chilikin39,47, K. Cho34, S.-K. Choi11, Y. Choi68, D. Cinabro81, N. Dash18, S. Di Carlo81, Z. Doležal4, Z. Drásal4, S. Eidelman3,58, H. Farhat81, J. E. Fast60, T. Ferber7, B. G. Fulsom60, V. Gaur80, N. Gabyshev3,58, A. Garmash3,58, R. Gillard81, P. Goldenzweig30, E. Guido26, J. Haba14,10, K. Hayasaka57, H. Hayashii51, W.-S. Hou54, T. Iijima50,49, K. Inami49, A. Ishikawa74, R. Itoh14,10, Y. Iwasaki14, W. W. Jacobs21, I. Jaegle8, H. B. Jeon37, S. Jia2, Y. Jin76, D. Joffe31, K. K. Joo5, T. Julius45, K. H. Kang37, G. Karyan7, D. Y. Kim66, J. B. Kim35, K. T. Kim35, M. J. Kim37, S. H. Kim12, Y. J. Kim34, K. Kinoshita6, P. Kodyš4, S. Korpar43,28, D. Kotchetkov13, P. Križan40,28, P. Krokovny3,58, R. Kulasiri31, T. Kumita78, A. Kuzmin3,58, Y.-J. Kwon83, J. S. Lange9, L. Li64, L. Li Gioi44, J. Libby20, D. Liventsev80,14, M. Lubej28, T. Luo61, M. Masuda75, T. Matsuda46, D. Matvienko3,58, M. Merola25, K. Miyabayashi51, H. Miyata57, R. Mizuk39,47,48, H. K. Moon35, T. Mori49, R. Mussa26, E. Nakano59, M. Nakao14,10, T. Nanut28, K. J. Nath19, Z. Natkaniec55, M. Niiyama36, N. K. Nisar61, S. Nishida14,10, S. Ogawa73, H. Ono56,57, P. Pakhlov39,47, G. Pakhlova39,48, B. Pal6, S. Pardi25, H. Park37, S. Paul72, T. K. Pedlar42, R. Pestotnik28, L. E. Piilonen80, C. Pulvermacher14, M. Ritter41, A. Rostomyan7, Y. Sakai14,10, L. Santelj14, V. Savinov61, O. Schneider38, G. Schnell1,16, C. Schwanda23, Y. Seino57, K. Senyo82, M. E. Sevior45, V. Shebalin3,58, C. P. Shen2, T.-A. Shibata77, J.-G. Shiu54, B. Shwartz3,58, F. Simon44,71, A. Sokolov24, E. Solovieva39,48, M. Starič28, J. F. Strube60, K. Sumisawa14,10, T. Sumiyoshi78, M. Takizawa65,15,62, U. Tamponi26,79, K. Tanida27, F. Tenchini45, M. Uchida77, T. Uglov39,48, Y. Unno12, S. Uno14,10, C. Van Hulse1, G. Varner13, V. Vorobyev3,58, A. Vossen21, C. H. Wang53, P. Wang22, M. Watanabe57, Y. Watanabe29, S. Watanuki74, E. Widmann67, E. Won35, Y. Yamashita56, H. Ye7, Z. P. Zhang64, V. Zhilich3,58, V. Zhukova47, V. Zhulanov3,58, and A. Zupanc40,28 (Belle Collaboration)
Physical Review D 96 ( 3 ) 032005 2017.8
Language：English Publishing type：Research paper (scientific journal)
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Measurement of branching fraction and direct CP asymmetry in charmless B+ →K+K−π+ decays at Belle Reviewed
C.-L. Hsu39, D. Dossett39, M. E. Sevior39, I. Adachi13,10, H. Aihara70, S. Al Said63,28, D. M. Asner53, H. Atmacan59, V. Aulchenko3,51, T. Aushev42, R. Ayad63, I. Badhrees63,27, A. M. Bakich62, E. Barberio39, P. Behera19, M. Berger60, V. Bhardwaj16, B. Bhuyan18, J. Biswal23, T. Bloomfield39, A. Bondar3,51, G. Bonvicini73, A. Bozek48, M. Bračko37,23, T. E. Browder12, P. Chang47, V. Chekelian38, A. Chen45, B. G. Cheon11, K. Chilikin33,41, R. Chistov33,41, K. Cho29, Y. Choi61, D. Cinabro73, N. Dash17, S. Di Carlo73, Z. Doležal4, Z. Drásal4, S. Eidelman3,51, H. Farhat73, J. E. Fast53, B. G. Fulsom53, V. Gaur64, N. Gabyshev3,51, A. Garmash3,51, P. Goldenzweig25, B. Golob34,23, O. Grzymkowska48, E. Guido22, J. Haba13,10, T. Hara13,10, K. Hayasaka50, H. Hayashii44, M. T. Hedges12, W.-S. Hou47, K. Inami43, G. Inguglia7, A. Ishikawa68, W. W. Jacobs20, I. Jaegle8, H. B. Jeon31, Y. Jin70, D. Joffe26, K. K. Joo5, T. Julius39, A. B. Kaliyar19, K. H. Kang31, P. Katrenko42,33, T. Kawasaki50, C. Kiesling38, D. Y. Kim58, H. J. Kim31, J. B. Kim30, K. T. Kim30, M. J. Kim31, S. H. Kim11, P. Kodyš4, S. Korpar37,23, D. Kotchetkov12, P. Križan34,23, P. Krokovny3,51, T. Kuhr35, R. Kulasiri26, A. Kuzmin3,51, Y.-J. Kwon75, Y.-T. Lai47, J. S. Lange9, C. H. Li39, L. Li56, L. Li Gioi38, J. Libby19, D. Liventsev72,13, M. Lubej23, T. Luo54, M. Masuda69, T. Matsuda40, D. Matvienko3,51, K. Miyabayashi44, H. Miyata50, R. Mizuk33,41,42, G. B. Mohanty64, T. Mori43, R. Mussa22, E. Nakano52, M. Nakao13,10, T. Nanut23, K. J. Nath18, Z. Natkaniec48, M. Nayak73,13, N. K. Nisar54, S. Nishida13,10, S. Ogawa67, S. Okuno24, H. Ono49,50, Y. Onuki70, G. Pakhlova33,42, B. Pal6, C.-S. Park75, C. W. Park61, H. Park31, S. Paul66, T. K. Pedlar36, L. Pesántez2, L. E. Piilonen72, M. Ritter35, A. Rostomyan7, Y. Sakai13,10, S. Sandilya6, T. Sanuki68, Y. Sato43, V. Savinov54, O. Schneider32, G. Schnell1,15, C. Schwanda21, Y. Seino50, K. Senyo74, V. Shebalin3,51, T.-A. Shibata71, J.-G. Shiu47, B. Shwartz3,51, F. Simon38,65, E. Solovieva33,42, M. Starič23, J. F. Strube53, K. Sumisawa13,10, M. Takahashi7, M. Takizawa57,14,55, F. Tenchini39, M. Uchida71, T. Uglov33,42, Y. Unno11, S. Uno13,10, P. Urquijo39, Y. Usov3,51, C. Van Hulse1, G. Varner12, K. E. Varvell62, V. Vorobyev3,51, E. Waheed39, C. H. Wang46, M.-Z. Wang47, X.-L. Wang53,13, M. Watanabe50, Y. Watanabe24, E. Widmann60, K. M. Williams72, E. Won30, Y. Yamashita49, H. Ye7, Z. P. Zhang56, V. Zhilich3,51, V. Zhukova41, V. Zhulanov3,51, and A. Zupanc34,23 (Belle Collaboration)
Physical Review D 96 ( 3 ) 031101 2017.8
Language：English Publishing type：Research paper (scientific journal)
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Sivers asymmetry extracted in SIDIS at the hard scales of the Drell–Yan process at COMPASS Reviewed
Adolph C., Aghasyan M., Akhunzyanov R., Alexeev M., Alexeev G., Amoroso A., Andrieux V., Anfimov N., Anosov V., Augsten K., Augustyniak W., Austregesilo A., Azevedo C., Badełek B., Balestra F., Ball M., Barth J., Beck R., Bedfer Y., Bernhard J., Bicker K., Bielert E., Birsa R., Bodlak M., Bordalo P., Bradamante F., Braun C., Bressan A., Büchele M., Chang W., Chatterjee C., Chiosso M., Choi I., Chung S., Cicuttin A., Crespo M., Curiel Q., Dalla Torre S., Dasgupta S., Dasgupta S., Denisov O., Dhara L., Donskov S., Doshita N., Dreisbach C., Duic V., Dünnweber W., Dziewiecki M., Efremov A., Eversheim P., Eyrich W., Faessler M., Ferrero A., Finger M., Finger M., Fischer H., Franco C., du Fresne von Hohenesche N., Friedrich J., Frolov V., Fuchey E., Gautheron F., Gavrichtchouk O., Gerassimov S., Giarra J., Giordano F., Gnesi I., Gorzellik M., Grabmüller S., Grasso A., Grosse Perdekamp M., Grube B., Grussenmeyer T., Guskov A., Haas F., Hahne D., Hamar G., von Harrach D., Heinsius F., Heitz R.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 770 138 - 145 2017.7
Language：English Publishing type：Research paper (scientific journal) Publisher：Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
© 2017 The Authors Eight proton transverse-spin-dependent azimuthal asymmetries are extracted in four regions of the photon virtuality Q 2 from the COMPASS 2010 semi-inclusive hadron measurements in deep inelastic muon–nucleon scattering. These Q 2 regions correspond to the four regions of the di-muon mass Q 2 used in the ongoing analyses of the COMPASS Drell–Yan measurements, which allows for a future direct comparison of the nucleon transverse-momentum-dependent parton distribution functions extracted from these two alternative measurements. In addition, for the azimuthal asymmetries induced by the Sivers transverse-momentum-dependent parton distribution function various two-dimensional kinematic dependences are presented. The integrated Sivers asymmetries are found to be positive with an accuracy that appears to be sufficient to test the sign change of the Sivers function predicted by Quantum Chromodynamics.
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Final COMPASS results on the deuteron spin-dependent structure function g1p and the Bjorken sum rule Reviewed
Adolph C., Aghasyan M., Akhunzyanov R., Alexeev M., Alexeev G., Amoroso A., Andrieux V., Anfimov N., Anosov V., Augsten K., Augustyniak W., Austregesilo A., Azevedo C., Badełek B., Balestra F., Ball M., Barth J., Beck R., Bedfer Y., Bernhard J., Bicker K., Bielert E., Birsa R., Bodlak M., Bordalo P., Bradamante F., Braun C., Bressan A., Büchele M., Chang W., Chatterjee C., Chiosso M., Choi I., Chung S., Cicuttin A., Crespo M., Curiel Q., Dalla Torre S., Dasgupta S., Dasgupta S., Denisov O., Dhara L., Donskov S., Doshita N., Dreisbach C., Duic V., Dünnweber W., Dziewiecki M., Efremov A., Eversheim P., Eyrich W., Faessler M., Ferrero A., Finger M., Finger M., Fischer H., Franco C., du Fresne von Hohenesche N., Friedrich J., Frolov V., Fuchey E., Gautheron F., Gavrichtchouk O., Gerassimov S., Giarra J., Giordano F., Gnesi I., Gorzellik M., Grabmüller S., Grasso A., Grosse Perdekamp M., Grube B., Grussenmeyer T., Guskov A., Haas F., Hahne D., Hamar G., von Harrach D., Heinsius F., Heitz R., Herrmann F., Horikawa N., d'Hose N.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 769 34 - 41 2017.6
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
© 2017 The Author(s) Final results are presented from the inclusive measurement of deep-inelastic polarised-muon scattering on longitudinally polarised deuterons using a 6 LiD target. The data were taken at 160 GeV beam energy and the results are shown for the kinematic range 1(GeV/c) 2 < ;Q 2 < 100(GeV/c) 2 in photon virtuality, 0.004 < ;x < ;0.7 in the Bjorken scaling variable and W > 4GeV/c 2 in the mass of the hadronic final state. The deuteron double-spin asymmetry A 1 d and the deuteron longitudinal-spin structure function g 1 d are presented in bins of x and Q 2 . Towards lowest accessible values of x, g 1 d decreases and becomes consistent with zero within uncertainties. The presented finalg 1 d values together with the recently published final g 1 p values of COMPASS are used to again evaluate the Bjorken sum rule and perform the QCD fit to the g 1 world data at next-to-leading order of the strong coupling constant. In both cases, changes in central values of the resulting numbers are well within statistical uncertainties. The flavour-singlet axial charge a 0 , which is identified in the MS‾renormalisation scheme with the total contribution of quark helicities to the nucleon spin, is extracted at next-to-leading order accuracy from only the COMPASS deuteron data: a 0 (Q 2 =3(GeV/c) 2 )=0.32±0.02 stat ±0.04 syst ±0.05 evol . Together with the recent results on the proton spin structure function g 1 p , the results on g 1 d constitute the COMPASS legacy on the measurements of g 1 through inclusive spin-dependent deep inelastic scattering.
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Observation of an alternative χc0 (2P) candidate in e+e- →j /ψD D Reviewed
Chilikin K., Adachi I., Aihara H., Al Said S., Asner D., Aulchenko V., Ayad R., Babu V., Badhrees I., Bakich A., Bansal V., Barberio E., Besson D., Bhardwaj V., Bhuyan B., Biswal J., Bobrov A., Bondar A., Bozek A., Bračko M., Browder T., Červenkov D., Chekelian V., Chen A., Cheon B., Cho K., Choi Y., Cinabro D., Dash N., Di Carlo S., DoleŽal Z., Drásal Z., Dutta D., Eidelman S., Farhat H., Fast J., Ferber T., Fulsom B., Gaur V., Gabyshev N., Garmash A., Gillard R., Goldenzweig P., Haba J., Hara T., Hayasaka K., Hou W., Inami K., Ishikawa A., Itoh R., Iwasaki Y., Jacobs W., Jaegle I., Jeon H., Jin Y., Joffe D., Joo K., Julius T., Kang K., Karyan G., Katrenko P., Kim D., Kim H., Kim J., Kim K., Kim M., Kim S., Kim Y., Kinoshita K., Kodyš P., Korpar S., Kotchetkov D., KriŽan P., Krokovny P., Kuhr T., Kulasiri R., Kuzmin A., Kwon Y., Lange J., Li L., Li Gioi L.
Physical Review D 95 ( 11 ) 2017.6
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review D
© 2017 American Physical Society. We perform a full amplitude analysis of the process e+e-→J/ψDD, where D refers to either D0 or D+. A new charmoniumlike state X∗(3860) that decays to DD is observed with a significance of 6.5σ. Its mass is (3862-32+26 -13+40) MeV/c2, and its width is (201-67+154 -82+88) MeV. The JPC=0++ hypothesis is favored over the 2++ hypothesis at the level of 2.5σ. The analysis is based on the 980 fb-1 data sample collected by the Belle detector at the asymmetric-energy e+e- collider KEKB.
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Measurement of the τ Lepton Polarization and R (D∗) in the Decay B →D∗ τ- ντ Reviewed
Hirose S., Iijima T., Adachi I., Adamczyk K., Aihara H., Al Said S., Asner D., Atmacan H., Aulchenko V., Aushev T., Ayad R., Babu V., Badhrees I., Bakich A., Bansal V., Barberio E., Behera P., Berger M., Bhuyan B., Biswal J., Bondar A., Bonvicini G., Bozek A., Bračko M., Browder T., Červenkov D., Chang P., Chen A., Cheon B., Chilikin K., Chistov R., Cho K., Choi Y., Cinabro D., Danilov M., Dash N., Di Carlo S., Dingfelder J., DoleŽal Z., Drásal Z., Dutta D., Eidelman S., Epifanov D., Farhat H., Fast J., Ferber T., Fulsom B., Gaur V., Gabyshev N., Garmash A., Goldenzweig P., Golob B., Greenwald D., Grygier J., Haba J., Hara K., Hasenbusch J., Hayasaka K., Hayashii H., Higuchi T., Hou W., Hsu C., Inami K., Inguglia G., Ishikawa A., Itoh R., Iwasaki Y., Jacobs W., Jaegle I., Jin Y., Joffe D., Joo K., Julius T., Kato Y., Kawasaki T., Kichimi H., Kiesling C., Kim D., Kim J., Kim K., Kim M., Kim S., Kinoshita K.
Physical Review Letters 118 ( 21 ) 2017.5
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review Letters
© 2017 American Physical Society. We report the first measurement of the τ lepton polarization Pτ(D∗) in the decay B→D∗τ-ντ as well as a new measurement of the ratio of the branching fractions R(D∗)=B(B→D∗τ-ντ)/B(B→D∗-ν), where - denotes an electron or a muon, and the τ is reconstructed in the modes τ-→π-ντ and τ-→ρ-ντ. We use the full data sample of 772×106 BB pairs recorded with the Belle detector at the KEKB electron-positron collider. Our results, Pτ(D∗)=-0.38±0.51(stat)-0.16+0.21(syst) and R(D∗)=0.270±0.035(stat)-0.025+0.028(syst), are consistent with the theoretical predictions of the standard model.
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First measurement of T -odd moments in D0 → K0S π+π-π0 decays Reviewed
Prasanth K., Libby J., Adachi I., Aihara H., Al Said S., Asner D., Aulchenko V., Aushev T., Ayad R., Babu V., Badhrees I., Bahinipati S., Bakich A., Bansal V., Barberio E., Berger M., Bhardwaj V., Bhuyan B., Biswal J., Bobrov A., Bondar A., Bonvicini G., Bozek A., Bračko M., Browder T., Červenkov D., Chekelian V., Chen A., Cheon B., Chilikin K., Chistov R., Cho K., Choi S., Choi Y., Cinabro D., Dash N., Di Carlo S., DoleŽal Z., Drásal Z., Dutta D., Eidelman S., Epifanov D., Farhat H., Fast J., Ferber T., Fulsom B., Gaur V., Gabyshev N., Garmash A., Gillard R., Goldenzweig P., Greenwald D., Haba J., Hara T., Hayasaka K., Hedges M., Hou W., Inami K., Ishikawa A., Itoh R., Iwasaki Y., Jacobs W., Jaegle I., Jeon H., Jin Y., Joffe D., Joo K., Julius T., Kaliyar A., Kang K., Karyan G., Kawasaki T., Kiesling C., Kim D., Kim J., Kim K., Kim M., Kim S., Kim Y., Kinoshita K., Kodyš P., Korpar S., Kotchetkov D.
Physical Review D 95 ( 9 ) 2017.5
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Physical Review D
© 2017 American Physical Society. We report the first measurement of the T-odd moments in the decay D0→KS0π+π-π0 from a data sample corresponding to an integrated luminosity of 966 fb-1 collected by the Belle experiment at the KEKB asymmetric-energy e+e- collider. From these moments we determine the CP-violation-sensitive asymmetry aCPT-odd=[-0.28±1.38(stat.)-0.76+0.23(syst.)]×10-3, which is consistent with no CP violation. In addition, we perform aCPT-odd measurements in different regions of the D0→KS0π+π-π0 phase space; these are also consistent with no CP violation.
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Multiplicities of charged kaons from deep-inelastic muon scattering off an isoscalar target Reviewed
Adolph C., Aghasyan M., Akhunzyanov R., Alexeev M., Alexeev G., Amoroso A., Andrieux V., Anfimov N., Anosov V., Augsten K., Augustyniak W., Austregesilo A., Azevedo C., Badełek B., Balestra F., Ball M., Barth J., Beck R., Bedfer Y., Bernhard J., Bicker K., Bielert E., Birsa R., Bodlak M., Bordalo P., Bradamante F., Braun C., Bressan A., Büchele M., Capozza L., Chang W., Chatterjee C., Chiosso M., Choi I., Chung S., Cicuttin A., Crespo M., Curiel Q., Dalla Torre S., Dasgupta S., Dasgupta S., Denisov O., Dhara L., Donskov S., Doshita N., Dreisbach C., Duic V., Dünnweber W., Dziewiecki M., Efremov A., Eversheim P., Eyrich W., Faessler M., Ferrero A., Finger M., Finger M., Fischer H., Franco C., du Fresne von Hohenesche N., Friedrich J., Frolov V., Fuchey E., Gautheron F., Gavrichtchouk O., Gerassimov S., Giordano F., Gnesi I., Gorzellik M., Grabmüller S., Grasso A., Grosse Perdekamp M., Grube B., Grussenmeyer T., Guskov A., Haas F., Hahne D., Hamar G., von Harrach D., Heinsius F., Heitz R., Herrmann F., Horikawa N., d'Hose N.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 767 133 - 141 2017.4
Language：English Publishing type：Research paper (scientific journal) Publisher：Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
© 2017 The Author(s) Precise measurements of charged-kaon multiplicities in deep inelastic scattering were performed. The results are presented in three-dimensional bins of the Bjorken scaling variable x, the relative virtual-photon energy y, and the fraction z of the virtual-photon energy carried by the produced hadron. The data were obtained by the COMPASS Collaboration by scattering 160 GeV muons off an isoscalar 6 LiD target. They cover the kinematic domain 1(GeV/c) 2 < Q 2 < 60(GeV/c) 2 in the photon virtuality, 0.004 < x < 0.4, 0.1 < y < 0.7, 0.20 < z < 0.85, and W > 5 GeV/c 2 in the invariant mass of the hadronic system. The results from the sum of the z-integrated K + and K − multiplicities at high x point to a value of the non-strange quark fragmentation function larger than obtained by the earlier DSS fit.
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Adolph C., Aghasyan M., Akhunzyanov R., Alexeev M., Alexeev G., Amoroso A., Andrieux V., Anfimov N., Anosov V., Augustyniak W., Austregesilo A., Azevedo C., Badełek B., Balestra F., Barth J., Beck R., Bedfer Y., Bernhard J., Bicker K., Bielert E., Birsa R., Bisplinghoff J., Bodlak M., Boer M., Bordalo P., Bradamante F., Braun C., Bressan A., Büchele M., Chang W., Chiosso M., Choi I., Chung S., Cicuttin A., Crespo M., Curiel Q., Dalla Torre S., Dasgupta S., Dasgupta S., Denisov O., Dhara L., Donskov S., Doshita N., Duic V., Dünnweber W., Dziewiecki M., Efremov A., Eversheim P., Eyrich W., Faessler M., Ferrero A., Finger M., jr M., Fischer H., Franco C., du Fresne von Hohenesche N., Friedrich J., Frolov V., Fuchey E., Gautheron F., Gavrichtchouk O., Gerassimov S., Giordano F., Gnesi I., Gorzellik M., Grabmüller S., Grasso A., Grosse Perdekamp M., Grube B., Grussenmeyer T., Guskov A., Haas F., Hahne D., von Harrach D., Hashimoto R., Heinsius F., Heitz R., Herrmann F., Hinterberger F., Horikawa N., d’Hose N., Hsieh C., Huber S., Ishimoto S., Ivanov A.
European Physical Journal C 77 ( 4 ) 2017.4
Language：English Publishing type：Research paper (scientific journal) Publisher：European Physical Journal C
© 2017, The Author(s). Using a novel analysis technique, the gluon polarisation in the nucleon is re-evaluated using the longitudinal double-spin asymmetry measured in the cross section of semi-inclusive single-hadron muoproduction with photon virtuality Q2 > 1(GeV/c)2. The data were obtained by the COMPASS experiment at CERN using a 160 GeV/c polarised muon beam impinging on a polarised 6 LiD target. By analysing the full range in hadron transverse momentum p T , the different p T -dependences of the underlying processes are separated using a neural-network approach. In the absence of pQCD calculations at next-to-leading order in the selected kinematic domain, the gluon polarisation Δ g/ g is evaluated at leading order in pQCD at a hard scale of μ 2 = ⟨ Q 2 ⟩ = 3 (GeV / c) 2 . It is determined in three intervals of the nucleon momentum fraction carried by gluons, x g , covering the range 0.04 < xg < 0.28 and does not exhibit a significant dependence on x g . The average over the three intervals, ⟨ Δ g/ g⟩ = 0.113 ± 0. 038 (stat.) ± 0. 036 (syst.) at ⟨ x g ⟩ ≈ 0.10 , suggests that the gluon polarisation is positive in the measured x g range.
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Lepton-Flavor-Dependent Angular Analysis of B →k∗ℓ+ℓ- Reviewed
Wehle S., Niebuhr C., Yashchenko S., Adachi I., Aihara H., Al Said S., Asner D., Aulchenko V., Aushev T., Ayad R., Aziz T., Babu V., Bakich A., Bansal V., Barberio E., Bartel W., Behera P., Bhuyan B., Biswal J., Bobrov A., Bondar A., Bonvicini G., Bozek A., Bračko M., Browder T., Červenkov D., Chang P., Chekelian V., Chen A., Cheon B., Chilikin K., Chistov R., Cho K., Choi Y., Cinabro D., Dash N., Dingfelder J., DoleŽal Z., Drásal Z., Dutta D., Eidelman S., Epifanov D., Farhat H., Fast J., Ferber T., Fulsom B., Gaur V., Gabyshev N., Garmash A., Gillard R., Goldenzweig P., Golob B., Grzymkowska O., Guido E., Haba J., Hara T., Hayasaka K., Hayashii H., Hedges M., Hou W., Hsu C., Iijima T., Inami K., Inguglia G., Ishikawa A., Itoh R., Iwasaki Y., Jacobs W., Jaegle I., Jeon H., Jin Y., Joffe D., Joo K., Julius T., Kaliyar A., Kang K., Karyan G., Katrenko P., Kawasaki T., Kichimi H., Kiesling C., Kim D.
Physical Review Letters 118 ( 11 ) 2017.3
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review Letters
© 2017 American Physical Society. We present a measurement of angular observables and a test of lepton flavor universality in the B→K∗ℓ+ℓ- decay, where ℓ is either e or μ. The analysis is performed on a data sample corresponding to an integrated luminosity of 711 fb-1 containing 772×106 BB pairs, collected at the (4S) resonance with the Belle detector at the asymmetric-energy e+e- collider KEKB. The result is consistent with standard model (SM) expectations, where the largest discrepancy from a SM prediction is observed in the muon modes with a local significance of 2.6σ.
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Resonance Production and ππ S-wave in π−+p→π−π−π++precoil at 190 GeV/c Reviewed
Adolph C., Akhunzyanov R., Alexeev M., Alexeev G., Amoroso A., Andrieux V., Anosov V., Augustyniak W., Austregesilo A., Azevedo C., Badełek B., Balestra F., Barth J., Beck R., Bedfer Y., Bernhard J., Bicker K., Bielert E., Birsa R., Bisplinghoff J., Bodlak M., Boer M., Bordalo P., Bradamante F., Braun C., Bressan A., Büchele M., Burtin E., Chang W., Chiosso M., Choi I., Chung S., Cicuttin A., Crespo M., Curiel Q., Dalla Torre S., Dasgupta S., Dasgupta S., Denisov O., Dhara L., Donskov S., Doshita N., Duic V., Dünnweber W., Dziewiecki M., Efremov A., Eversheim P., Eyrich W., Faessler M., Ferrero A., Finger M., Finger M., Fischer H., Franco C., Du Fresne Von Hohenesche N., Friedrich J., Frolov V., Fuchey E., Gautheron F., Gavrichtchouk O., Gerassimov S., Giordano F., Gnesi I., Gorzellik M., Grabmüller S., Grasso A., Grosse Perdekamp M., Grube B., Grussenmeyer T., Guskov A., Haas F., Hahne D., Von Harrach D., Hashimoto R., Heinsius F., Herrmann F., Hinterberger F., Horikawa N., D'Hose N., Hsieh C., Huber S.
Physical Review D 95 ( 3 ) 2017.2
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review D
© 2017 American Physical Society. The COMPASS collaboration has collected the currently largest data set on diffractively produced π-π-π+ final states using a negative pion beam of 190 GeV/c momentum impinging on a stationary proton target. This data set allows for a systematic partial-wave analysis in 100 bins of three-pion mass, 0.5 < m3π < 2.5 GeV/c2, and in 11 bins of the reduced four-momentum transfer squared, 0.1 < t′ < 1.0 (GeV/c)2. This two-dimensional analysis offers sensitivity to genuine one-step resonance production, i.e. the production of a state followed by its decay, as well as to more complex dynamical effects in nonresonant 3π production. In this paper, we present detailed studies on selected 3π partial waves with JPC=0-+, 1++, 2-+, 2++, and 4++. In these waves, we observe the well-known ground-state mesons as well as a new narrow axial-vector meson a1(1420) decaying into f0(980)π. In addition, we present the results of a novel method to extract the amplitude of the π-π+ subsystem with IGJPC=0+0++ in various partial waves from the π-π-π+ data. Evidence is found for correlation of the f0(980) and f0(1500) appearing as intermediate π-π+ isobars in the decay of the known π(1800) and π2(1880).
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Exclusive ω meson muoproduction on transversely polarised protons Reviewed
Adolph C., Aghasyan M., Akhunzyanov R., Alexeev M., Alexeev G., Amoroso A., Andrieux V., Anfimov N., Anosov V., Augustyniak W., Austregesilo A., Azevedo C., Badełek B., Balestra F., Barth J., Beck R., Bedfer Y., Bernhard J., Bicker K., Bielert E., Birsa R., Bisplinghoff J., Bodlak M., Boer M., Bordalo P., Bradamante F., Braun C., Bressan A., Büchele M., Chang W., Chatterjee C., Chiosso M., Choi I., Chung S., Cicuttin A., Crespo M., Curiel Q., Dalla Torre S., Dasgupta S., Dasgupta S., Denisov O., Dhara L., Donskov S., Doshita N., Duic V., Dünnweber W., Dziewiecki M., Efremov A., Eversheim P., Eyrich W., Faessler M., Ferrero A., Finger M., Finger M., Fischer H., Franco C., du Fresne von Hohenesche N., Friedrich J., Frolov V., Fuchey E., Gautheron F., Gavrichtchouk O., Gerassimov S., Giordano F., Gnesi I., Gorzellik M., Grabmüller S., Grasso A., Grosse Perdekamp M., Grube B., Grussenmeyer T., Guskov A., Haas F., Hahne D., von Harrach D., Hashimoto R., Heinsius F., Heitz R., Herrmann F., Hinterberger F., Horikawa N., d'Hose N.
Nuclear Physics B 915 454 - 475 2017.2
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Nuclear Physics B
© 2016 Exclusive production of ω mesons was studied at the COMPASS experiment by scattering 160 GeV/c muons off transversely polarised protons. Five single-spin and three double-spin azimuthal asymmetries were measured in the range of photon virtuality 1 (GeV/c) 2 < Q 2 < 10 (GeV/c) 2 , Bjorken scaling variable 0.003 < x Bj < 0.3 and transverse momentum squared of the ω meson 0.05 (GeV/c) 2 < p T 2 < 0.5 (GeV/c) 2 . The measured asymmetries are sensitive to the nucleon helicity-flip Generalised Parton Distributions (GPD) E that are related to the orbital angular momentum of quarks, the chiral-odd GPDs H T that are related to the transversity Parton Distribution Functions, and the sign of the πω transition form factor. The results are compared to recent calculations of a GPD-based model.
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Observation of D0 →ρ0γ and Search for CP Violation in Radiative Charm Decays Reviewed
Nanut T., Zupanc A., Adachi I., Aihara H., Al Said S., Asner D., Aulchenko V., Aushev T., Ayad R., Babu V., Badhrees I., Bakich A., Bansal V., Behera P., Bhardwaj V., Biswal J., Bondar A., Bozek A., Bračko M., Browder T., Červenkov D., Chekelian V., Chen A., Cheon B., Chistov R., Cho K., Choi S., Choi Y., Cinabro D., Dash N., Di Carlo S., DoleŽal Z., Dutta D., Eidelman S., Farhat H., Fast J., Ferber T., Fulsom B., Gaur V., Gabyshev N., Garmash A., Gillard R., Goldenzweig P., Golob B., Hayasaka K., Hayashii H., Hou W., Iijima T., Inami K., Inguglia G., Ishikawa A., Iwasaki Y., Jacobs W., Jaegle I., Joffe D., Joo K., Julius T., Kaliyar A., Kang K., Kawasaki T., Kim D., Kim J., Kim K., Kim M., Kim S., Kinoshita K., Kodyš P., Korpar S., Krokovny P., Kuhr T., Kulasiri R., Kuzmin A., Kwon Y., Lange J., Lee I., Li C., Li L., Li Y., Li Gioi L., Libby J., Liventsev D., Lubej M., Masuda M.
Physical Review Letters 118 ( 5 ) 2017.1
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review Letters
© 2017 American Physical Society. We report the first observation of the radiative charm decay D0→ρ0γ and the first search for CP violation in decays D0→ρ0γ, φγ, and K̄∗0(892)γ, using a data sample of 943 fb-1 collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. The branching fraction is measured to be B(D0→ρ0γ)=(1.77±0.30±0.07)×10-5, where the first uncertainty is statistical and the second is systematic. The obtained CP asymmetries ACP(D0→ρ0γ)=+0.056±0.152±0.006, ACP(D0→φγ)=-0.094±0.066±0.001, and ACP(D0→K̄∗0γ)=-0.003±0.020±0.000 are consistent with no CP violation. We also present an improved measurement of the branching fractions B(D0→φγ)=(2.76±0.19±0.10)×10-5 and B(D0→K̄∗0γ)=(4.66±0.21±0.21)×10-4.
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Search for D0 decays to invisible final states at Belle Reviewed
Lai Y., Wang M., Adachi I., Aihara H., Al Said S., Asner D., Aushev T., Ayad R., Badhrees I., Bakich A., Bansal V., Barberio E., Berger M., Bhardwaj V., Bhuyan B., Biswal J., Bobrov A., Bozek A., Bračko M., Červenkov D., Chang P., Chen A., Cheon B., Chilikin K., Chistov R., Cho K., Chobanova V., Choi Y., Cinabro D., Dash N., Di Carlo S., DoleŽal Z., Dutta D., Eidelman S., Epifanov D., Farhat H., Fast J., Ferber T., Fulsom B., Gaur V., Gabyshev N., Garmash A., Gillard R., Goldenzweig P., Golob B., Hayasaka K., Hou W., Hsu C., Iijima T., Inami K., Inguglia G., Ishikawa A., Itoh R., Iwasaki Y., Jacobs W., Jaegle I., Jeon H., Joffe D., Joo K., Julius T., Kang K., Kawasaki T., Kim D., Kim J., Kim K., Kim M., Kim S., Kim Y., Kinoshita K., Kodyš P., Kotchetkov D., Krokovny P., Kuhr T., Kulasiri R., Kwon Y., Lange J., Lee I., Li C., Li L., Li Y., Li Gioi L., Libby J., Liventsev D., Masuda M.
Physical Review D 95 ( 1 ) 2017.1
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review D
© 2017 American Physical Society. We report the result from the first search for D0 decays to invisible final states. The analysis is performed on a data sample of 924 fb-1 collected at and near the (4S) and (5S) resonances with the Belle detector at the KEKB asymmetric-energy e+e- collider. The absolute branching fraction is determined using an inclusive D0 sample, obtained by fully reconstructing the rest of the particle system including the other charmed particle. No significant signal yield is observed and an upper limit of 9.4×10-5 is set on the branching fraction of D0 to invisible final states at 90% confidence level.
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Adolph C., Aghasyan M., Akhunzyanov R., Alexeev G., Alexeev M., Amoroso A., Andrieux V., Anfimov N., Anosov V., Augsten K., Augustyniak W., Austregesilo A., Azevedo C., Badełek B., Balestra F., Barth J., Beck R., Bedfer Y., Bernhard J., Bicker K., Bielert E., Birsa R., Bisplinghoff J., Bodlak M., Boer M., Bordalo P., Bradamante F., Braun C., Bressan A., Büchele M., Capozza L., Chang W., Chatterjee C., Chiosso M., Choi I., Chung S., Cicuttin A., Crespo M., Curiel Q., Dalla Torre S., Dasgupta S., Dasgupta S., Denisov O., Dhara L., Donskov S., Doshita N., Duic V., Dünnweber W., Dziewiecki M., Efremov A., Eversheim P., Eyrich W., Faessler M., Ferrero A., Finger M., Finger M., Fischer H., Franco C., du Fresne von Hohenesche N., Friedrich J., Frolov V., Fuchey E., Gautheron F., Gavrichtchouk O., Gerassimov S., Giordano F., Gnesi I., Gorzellik M., Grabmüller S., Grasso A., Grosse Perdekamp M., Grube B., Grussenmeyer T., Guskov A., Haas F., Hahne D., von Harrach D., Hashimoto R., Heinsius F., Heitz R., Herrmann F., Hinterberger F., Horikawa N., d'Hose N., Hsieh C.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 764 1 - 10 2017.1
Language：English Publishing type：Research paper (scientific journal) Publisher：Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
© 2016 The Author(s) Multiplicities of charged pions and charged hadrons produced in deep-inelastic scattering were measured in three-dimensional bins of the Bjorken scaling variable x, the relative virtual-photon energy y and the relative hadron energy z. Data were obtained by the COMPASS Collaboration using a 160GeV muon beam and an isoscalar target ( 6 LiD). They cover the kinematic domain in the photon virtuality Q 2 > 1(GeV/c) 2 , 0.004 < x < 0.4, 0.2 < z < 0.85 and 0.1 < y < 0.7. In addition, a leading-order pQCD analysis was performed using the pion multiplicity results to extract quark fragmentation functions.
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Search for the 0-- Glueball in Upsilon(1S) and Upsilon(2S) decays Reviewed
Jia S., Shen C., Yuan C., Adachi I., Aihara H., Al Said S., Asner D., Aushev T., Ayad R., Babu V., Badhrees I., Bakich A., Bansal V., Barberio E., Behera P., Bhuyan B., Biswal J., Bonvicini G., Bozek A., Bračko M., Browder T., Červenkov D., Chang P., Chekelian V., Chen A., Cheon B., Chilikin K., Cho K., Choi S., Choi Y., Cinabro D., Dash N., Di Carlo S., DoleŽal Z., Drásal Z., Dutta D., Eidelman S., Farhat H., Fast J., Ferber T., Fulsom B., Gaur V., Gabyshev N., Garmash A., Gillard R., Goldenzweig P., Golob B., Haba J., Hara T., Hayasaka K., Hayashii H., Hedges M., Hou W., Iijima T., Inami K., Inguglia G., Ishikawa A., Itoh R., Jaegle I., Joffe D., Joo K., Julius T., Kang K., Katrenko P., Kawasaki T., Kichimi H., Kiesling C., Kim D., Kim H., Kim J., Kim K., Kim M., Kim S., Kim Y., Kodyš P., Korpar S., Kotchetkov D., KriŽan P., Krokovny P., Kuhr T., Kulasiri R., Kuzmin A.
Physical Review D 95 ( 1 ) 2017.1
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review D
© 2017 American Physical Society. We report the first search for the JPC=0 - glueball in (1S) and (2S) decays with data samples of (102±2)×106 and (158±4)×106 events, respectively, collected with the Belle detector. No significant signals are observed in any of the proposed production modes, and the 90% credibility level upper limits on their branching fractions in (1S) and (2S) decays are obtained. The inclusive branching fractions of the (1S) and (2S) decays into final states with a χc1 are measured to be B( (1S)→χc1+anything)=(1.90±0.43(stat)±0.14(syst))×10-4 with an improved precision over prior measurements and B((2S)→χc1+anything)=(2.24±0.44(stat)±0.20(syst))×10-4 for the first time.
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Search for a dark vector gauge boson decaying to π+π- using η →π+π-γ decays Reviewed
Won E., Adachi I., Aihara H., Al Said S., Asner D., Aushev T., Ayad R., Badhrees I., Bakich A., Bansal V., Barberio E., Behera P., Bhuyan B., Biswal J., Bobrov A., Bozek A., Bračko M., Červenkov D., Chekelian V., Chen A., Cheon B., Chilikin K., Chistov R., Cho K., Chobanova V., Choi Y., Cinabro D., Dash N., Di Carlo S., DoleŽal Z., Drásal Z., Dutta D., Eidelman S., Epifanov D., Farhat H., Fast J., Ferber T., Fulsom B., Gaur V., Gabyshev N., Garmash A., Gillard R., Goldenzweig P., Greenwald D., Haba J., Hayasaka K., Hayashii H., Hou W., Iijima T., Inami K., Inguglia G., Ishikawa A., Itoh R., Iwasaki Y., Jaegle I., Jeon H., Joffe D., Joo K., Julius T., Kang K., Kawasaki T., Kim D., Kim J., Kim K., Kim M., Kim S., Kim Y., Kinoshita K., Kodyš P., KriŽan P., Krokovny P., Kuhr T., Kulasiri R., Kwon Y., Lange J., Lee I., Li C., Li L., Li Y., Li Gioi L., Libby J., Liventsev D., Luo T.
Physical Review D 94 ( 9 ) 2016.11
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review D
© 2016 American Physical Society. We report a search for a dark vector gauge boson U′ that couples to quarks in the decay chain D∗+→D0π+,D0→KS0η,η→U′γ, U′→π+π-. No signal is found and we set a mass-dependent limit on the baryonic fine structure constant of 10-3-10-2 in the U′ mass range of 290 to 520 MeV/c2. This analysis is based on a data sample of 976 fb-1 collected by the Belle experiment at the KEKB asymmetric-energy e+e- collider.
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Sato Y., Iijima T., Adamczyk K., Aihara H., Asner D., Atmacan H., Aushev T., Ayad R., Aziz T., Babu V., Badhrees I., Bakich A., Bansal V., Behera P., Bhardwaj V., Bhuyan B., Biswal J., Bonvicini G., Bozek A., Bračko M., Červenkov D., Chang P., Chekelian V., Chen A., Cheon B., Chilikin K., Chistov R., Cho K., Chobanova V., Choi Y., Cinabro D., Danilov M., Dash N., Di Carlo S., DoleŽal Z., Dutta D., Eidelman S., Epifanov D., Farhat H., Fast J., Ferber T., Fulsom B., Gaur V., Gabyshev N., Garmash A., Goldenzweig P., Golob B., Greenwald D., Hara K., Hara T., Hasenbusch J., Hayasaka K., Hayashii H., Hirose S., Horiguchi T., Hou W., Inami K., Ishikawa A., Itoh R., Iwasaki Y., Jaegle I., Jeon H., Joffe D., Julius T., Kang K., Kato Y., Katrenko P., Kawasaki T., Kim D., Kim J., Kim K., Kim M., Kim S., Kim Y., Kinoshita K., Kodyš P., Korpar S., Kotchetkov D., Krokovny P., Kuhr T., Kumar R., Kwon Y., Lange J., Li C.
Physical Review D 94 ( 7 ) 2016.10
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review D
© 2016 American Physical Society. We report a measurement of the ratio R(D∗)=B(B0→D∗+τ-ντ)/B(B0→D∗+ν), where denotes an electron or a muon. The results are based on a data sample containing 772×106 BB pairs recorded at the (4S) resonance with the Belle detector at the KEKB e+e- collider. We select a sample of B0B0 pairs by reconstructing both B mesons in semileptonic decays to D∗ ±. We measure R(D∗)=0.302±0.030(stat)±0.011(syst), which is within 1.6σ of the Standard Model theoretical expectation, where the standard deviation σ includes systematic uncertainties. We use this measurement to constrain several scenarios of new physics in a model-independent approach.
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Mizuk R., Bondar A., Adachi I., Aihara H., Asner D., Atmacan H., Aulchenko V., Aushev T., Ayad R., Badhrees I., Bakich A., Barberio E., Behera P., Bhardwaj V., Bhuyan B., Biswal J., Bobrov A., Bonvicini G., Bozek A., Bračko M., Browder T., Červenkov D., Chekelian V., Chen A., Cheon B., Chilikin K., Chistov R., Chobanova V., Choi S., Choi Y., Cinabro D., Dalseno J., Danilov M., Dash N., DoleŽal Z., Drutskoy A., Eidelman S., Epifanov D., Ferber T., Fulsom B., Gaur V., Garmash A., Gillard R., Goh Y., Goldenzweig P., Golob B., Greenwald D., Hara T., Hayasaka K., Hayashii H., Hou W., Hsu C., Inami K., Inguglia G., Ishikawa A., Iwasaki Y., Jaegle I., Julius T., Kang K., Katrenko P., Kim D., Kim H., Kim J., Kim K., Kim M., Kim S., Kim Y., Kinoshita K., Kodyš P., Korpar S., Kotchetkov D., Krokovny P., Kuhr T., Kuzmin A., Kwon Y., Lange J., Li C., Li H., Li L.
Physical Review Letters 117 ( 14 ) 2016.9
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Physical Review Letters
© 2016 American Physical Society. Using data collected with the Belle detector at the KEKB asymmetric-energy e+e- collider, we measure the energy dependence of the e+e-→hb(nP)π+π- (n=1, 2) cross sections from thresholds up to 11.02 GeV. We find clear (10860) and (11020) peaks with little or no continuum contribution. We study the resonant substructure of the (11020)→hb(nP)π+π- transitions and find evidence that they proceed entirely via the intermediate isovector states Zb(10610) and Zb(10650). The relative fraction of these states is loosely constrained by the current data: The hypothesis that only Zb(10610) is produced is excluded at the level of 3.3 standard deviations, while the hypothesis that only Zb(10650) is produced is not excluded at a significant level.
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Study of excited Ξc states decaying into Ξc0 and Ξc+ baryons Reviewed
Yelton J., Adachi I., Aihara H., Asner D., Aulchenko V., Aushev T., Ayad R., Badhrees I., Bahinipati S., Bakich A., Barberio E., Behera P., Bhuyan B., Biswal J., Bonvicini G., Bozek A., Bračko M., Browder T., Červenkov D., Chen A., Cheon B., Chilikin K., Cho K., Choi Y., Cinabro D., Danilov M., Dash N., Di Carlo S., DoleŽal Z., Drásal Z., Dutta D., Eidelman S., Farhat H., Fast J., Ferber T., Fulsom B., Gaur V., Gabyshev N., Garmash A., Gillard R., Goldenzweig P., Hara T., Hayasaka K., Hayashii H., Hou W., Inguglia G., Ishikawa A., Itoh R., Iwasaki Y., Jacobs W., Jeon H., Joffe D., Joo K., Julius T., Kang K., Kato E., Kato Y., Kim D., Kim J., Kim K., Kim S., Kinoshita K., Kodyš P., Korpar S., Kotchetkov D., KriŽan P., Krokovny P., Kumita T., Kuzmin A., Kwon Y., Lange J., Li C., Li H., Li L., Li Y., Libby J., Liventsev D., Lubej M., Luo T., Masuda M., Matsuda T., Matvienko D., Miyabayashi K.
Physical Review D 94 ( 5 ) 2016.9
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review D
© 2016 American Physical Society. Using a data sample of 980 fb-1 of e+e- annihilation data taken with the Belle detector operating at the KEKB asymmetric-energy e+e- collider, we report the results of a study of excited Ξc states that decay, via the emission of photons and/or charged pions, into Ξc0 or Ξc+ ground state charmed-strange baryons. We present new measurements of the masses of all members of the Ξc′, Ξc(2645), Ξc(2790), Ξc(2815), and Ξc(2980) isodoublets, measurements of the intrinsic widths of those that decay strongly, and evidence of previously unknown transitions.
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Vorobyev V., Adachi I., Aihara H., Asner D., Aushev T., Ayad R., Badhrees I., Bahinipati S., Bakich A., Behera P., Bhardwaj V., Bhuyan B., Biswal J., Bobrov A., Bondar A., Bozek A., Bračko M., Browder T., Červenkov D., Chekelian V., Chen A., Cheon B., Chilikin K., Chistov R., Cho K., Chobanova V., Choi Y., Cinabro D., Danilov M., Dash N., Di Carlo S., DoleŽal Z., Drásal Z., Drutskoy A., Dutta D., Eidelman S., Epifanov D., Farhat H., Fast J., Ferber T., Fulsom B., Gaur V., Gabyshev N., Garmash A., Goldenzweig P., Greenwald D., Haba J., Hayasaka K., Hayashii H., Hou W., Inami K., Inguglia G., Ishikawa A., Itoh R., Iwasaki Y., Jacobs W., Jaegle I., Joffe D., Joo K., Julius T., Kang K., Kiesling C., Kim D., Kim H., Kim J., Kim K., Kim S., Kinoshita K., Kodyš P., Kotchetkov D., KriŽan P., Krokovny P., Kumar R., Kumita T., Kwon Y., Lange J., Li C., Li H., Li L., Li Y., Libby J., Liventsev D.
Physical Review D 94 ( 5 ) 2016.9
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review D
© 2016 American Physical Society. We report a measurement of the CP-violation parameter φ1 obtained in a time-dependent analysis of B0→D(∗)0h0 decays followed by D0→KS0π+π- decay. A model-independent measurement is performed using the binned Dalitz plot technique. The measured value is φ1=11.7°±7.8°(stat)±2.1°(syst). Treating sin2φ1 and cos2φ1 as independent parameters, we obtain sin2φ1=0.43±0.27(stat)±0.08(syst) and cos2φ1=1.06±0.33(stat)-0.15+0.21(syst). The results are obtained with a full data sample of 772×106BB pairs collected near the (4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider.
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Studies of charmed strange baryons in the ΛD final state at Belle Reviewed
Y. Kato, T. Iijima, T. Matsuda他
Physical Review D 94 032002 2016.8
Language：English Publishing type：Research paper (scientific journal)
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Studies of charmed strange baryons in the Λd final state at Belle Reviewed
Kato Y., Iijima T., Adachi I., Aihara H., Asner D., Aulchenko V., Ayad R., Badhrees I., Bakich A., Barberio E., Behera P., Bhardwaj V., Bhuyan B., Biswal J., Bobrov A., Bondar A., Bonvicini G., Bozek A., Bračko M., Browder T., Červenkov D., Chekelian V., Cheon B., Chilikin K., Chistov R., Cho K., Chobanova V., Choi S., Choi Y., Cinabro D., Dalseno J., Danilov M., Dash N., Di Carlo S., DoleŽal Z., Drásal Z., Dutta D., Eidelman S., Epifanov D., Farhat H., Fast J., Ferber T., Fulsom B., Gaur V., Gabyshev N., Garmash A., Gillard R., Glattauer R., Goldenzweig P., Grzymkowska O., Haba J., Hayasaka K., Hayashii H., Hirose S., Hou W., Inguglia G., Ishikawa A., Itoh R., Iwasaki Y., Jaegle I., Joo K., Julius T., Kato E., Kiesling C., Kim D., Kim J., Kim K., Kim S., Kim Y., Kinoshita K., Kodyš P., Korpar S., Kotchetkov D., KriŽan P., Krokovny P., Kuhr T., Kuzmin A., Kwon Y., Lange J., Li C.
Physical Review D 94 ( 3 ) 2016.8
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review D
© 2016 American Physical Society. We report the discovery of Ξc(3055)0, observed by its decay into the final-state ΛD0, and present the first observation and evidence of the decays of Ξc(3055)+ and Ξc(3080)+ into ΛD+. We also perform a combined analysis of the ΛD+ with the Σc++K- and Σc∗++K- decay modes to measure the ratios of branching fractions, masses and widths with improved accuracy. We measure the ratios of branching fractions B(Ξc(3055)+→ΛD+)/B(Ξc(3055)+→Σc++K-)=5.09±1.01±0.76, B(Ξc(3080)+→ΛD+)/B(Ξc(3080)+→Σc++K-)=1.29±0.30±0.15, and B(Ξc(3080)+→Σc∗++K-)/B(Ξc(3080)+→Σc++K-)=1.07±0.27±0.04, where the uncertainties are statistical and systematic. The analysis is performed using a 980 fb-1 data sample collected with the Belle detector at the KEKB asymmetric-energy e+e- collider.
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S. Y. Ryu, J. K. Ahn, T. Matsuda
Physical Review Letters 116 232001 2016.7
Language：English Publishing type：Research paper (scientific journal)
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First observation of γγ→pp＃U¯＃R K＃U+＃R K＃U−＃R and search for exotic baryons in pK systems Reviewed
C. P. Shen, C. Z. Yuan, T. Matsuda他
Physical Review D 93 112017 2016.6
Language：English Publishing type：Research paper (scientific journal)
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First observation of γγ →p p K+K- and search for exotic baryons in pK systems
Shen C., Yuan C., Adachi I., Aihara H., Asner D., Aulchenko V., Aushev T., Ayad R., Babu V., Badhrees I., Bakich A., Barberio E., Behera P., Bhardwaj V., Bhuyan B., Biswal J., Bobrov A., Bonvicini G., Bozek A., Bračko M., Browder T., Červenkov D., Chang P., Chekelian V., Chen A., Cheon B., Chilikin K., Chistov R., Cho K., Chobanova V., Choi S., Choi Y., Cinabro D., Dalseno J., Danilov M., Dash N., DoleŽal Z., Drásal Z., Dutta D., Eidelman S., Fang W., Fast J., Ferber T., Fulsom B., Gaur V., Gabyshev N., Garmash A., Gillard R., Glattauer R., Goldenzweig P., Grzymkowska O., Haba J., Hayasaka K., Hayashii H., Hou W., Iijima T., Inami K., Inguglia G., Ishikawa A., Itoh R., Iwasaki Y., Jaegle I., Jeon H., Joo K., Julius T., Kang K., Kato E., Kiesling C., Kim D., Kim J., Kim K., Kim S., Kim Y., Kodyš P., Korpar S., Kotchetkov D., KriŽan P., Krokovny P., Kuzmin A., Kwon Y., Lange J.
Physical Review D 93 ( 11 ) 2016.6
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Physical Review D
© 2016 American Physical Society. The process γγ→ppK+K- and its intermediate processes are measured for the first time using a 980 fb-1 data sample collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. The production of ppK+K- and a Λ(1520)0 (Λ(1520)0) signal in the pK- (pK+) invariant mass spectrum are clearly observed. However, no evidence for an exotic baryon near 1540 MeV/c2, denoted as Θ(1540)0 (Θ(1540)0) or Θ(1540)++ (Θ(1540) - ), is seen in the pK- (pK+) or pK+ (pK-) invariant mass spectra. Cross sections for γγ→ppK+K-, Λ(1520)0pK++c.c. and the products σ(γγ→Θ(1540)0pK++c.c.)B(Θ(1540)0→pK-) and σ(γγ→Θ(1540)++pK-+c.c.)B(Θ(1540)++→pK+) are measured. We also determine upper limits on the products of the χc0 and χc2 two-photon decay widths and their branching fractions to ppK+K- at the 90% credibility level.
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Search for XYZ states in Υ(1S) inclusive decays Reviewed
C. P. Shen, C. Z. Yuan, T. Matsuda他
Physical Review D 93 112013 2016.6
Language：English Publishing type：Research paper (scientific journal)
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Search for XYZ states in υ (1S) inclusive decays Reviewed
Shen C., Yuan C., Ban Y., Aihara H., Asner D., Badhrees I., Bakich A., Barberio E., Behera P., Bhardwaj V., Bhuyan B., Biswal J., Bondar A., Bonvicini G., Bozek A., Bračko M., Browder T., Červenkov D., Chekelian V., Chen A., Cheon B., Chilikin K., Chistov R., Cho K., Chobanova V., Choi S., Choi Y., Cinabro D., Dalseno J., Danilov M., Dash N., Di Carlo S., DoleŽal Z., Drásal Z., Dutta D., Eidelman S., Farhat H., Fast J., Ferber T., Fulsom B., Gaur V., Gabyshev N., Garmash A., Goldenzweig P., Haba J., Hayasaka K., Hayashii H., Hou W., Iijima T., Inguglia G., Ishikawa A., Itoh R., Jacobs W., Jeon H., Joo K., Julius T., Kang K., Kim D., Kim J., Kim K., Kim S., Kim Y., Kinoshita K., Kodyš P., Korpar S., Kotchetkov D., KriŽan P., Krokovny P., Kuhr T., Kuzmin A., Kwon Y., Lange J., Li C., Li H., Li L., Li Y., Li Gioi L., Libby J., Liventsev D., Luo T., Masuda M., Matsuda T.
Physical Review D 93 ( 11 ) 2016.6
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review D
© 2016 American Physical Society. The branching fractions of the υ (1S) inclusive decays into final states with a J/ψ or a ψ(2S) are measured with improved precision to be B(υ (1S)→J/ψ+anything)=(5.25±0.13(stat)±0.25(syst))×10-4 and B(υ (1S)→ψ(2S)+anything)=(1.23±0.17(stat)±0.11(syst))×10-4. The first search for υ (1S) decays into XYZ states that decay into a J/ψ or a ψ(2S) plus one or two charged tracks yields no significant signals for XYZ states in any of the examined decay modes, and upper limits on their production rates in υ (1S) inclusive decays are determined.
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Search for the decay B#U0#R →ϕγ Reviewed
Z. King, B. Pal, T. Matsuda他
Physical Review D 93 111101(R) 2016.6
Language：English Publishing type：Research paper (scientific journal)
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Search for the decay B0 →φγ Reviewed
King Z., Pal B., Schwartz A., Adachi I., Aihara H., Al Said S., Asner D., Atmacan H., Aushev T., Ayad R., Bakich A., Behera P., Bhardwaj V., Bhuyan B., Biswal J., Bobrov A., Bozek A., Browder T., Červenkov D., Chekelian V., Cheon B., Chilikin K., Chistov R., Cho K., Chobanova V., Choi Y., Cinabro D., Dalseno J., Dash N., DoleŽal Z., Dutta D., Eidelman S., Farhat H., Ferber T., Fulsom B., Gaur V., Gabyshev N., Garmash A., Gillard R., Glattauer R., Goh Y., Goldenzweig P., Golob B., Haba J., Hara T., Hayasaka K., Hayashii H., Horiguchi T., Hou W., Hsu C., Iijima T., Inami K., Inguglia G., Ishikawa A., Itoh R., Iwasaki Y., Jacobs W., Jeon H., Joo K., Julius T., Kang K., Kato E., Kawasaki T., Kiesling C., Kim D., Kim H., Kim J., Kim K., Kim S., Kim Y., Kinoshita K., Kodyš P., Korpar S., Kotchetkov D., KriŽan P., Krokovny P., Kuhr T., Kumita T., Lee I., Li C., Li H., Li L., Li Y.
Physical Review D 93 ( 11 ) 2016.6
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review D
© 2016 American Physical Society. We have searched for the decay B0→φγ using the full Belle data set of 772×106 BB pairs collected at the (4S) resonance with the Belle detector at the KEKB e+e- collider. No signal is observed, and we set an upper limit on the branching fraction of B(B0→φγ) < 1.0×10-7 at the 90% confidence level. This is the most stringent limit on this decay mode to date.
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Ryu S., Ahn J., Nakano T., Ahn D., Ajimura S., Akimune H., Asano Y., Chang W., Chen J., Daté S., Ejiri H., Fujimura H., Fujiwara M., Fukui S., Hasegawa S., Hicks K., Horie K., Hotta T., Hwang S., Imai K., Ishikawa T., Iwata T., Kato Y., Kawai H., Kino K., Kohri H., Kon Y., Kumagai N., Lin P., Maeda Y., Makino S., Matsuda T., Matsuoka N., Mibe T., Miyabe M., Miyachi M., Morino Y., Muramatsu N., Murayama R., Nakatsugawa Y., Nam S., Niiyama M., Nomachi M., Ohashi Y., Ohkuma H., Ohta T., Ooba T., Oshuev D., Parker J., Rangacharyulu C., Sakaguchi A., Sawada T., Shagin P., Shiino Y., Shimizu H., Strokovsky E., Sugaya Y., Sumihama M., Tokiyasu A., Toi Y., Toyokawa H., Tsunemi T., Uchida M., Ungaro M., Wakai A., Wang C., Wang S., Yonehara K., Yorita T., Yoshimura M., Yosoi M., Zegers R.
Physical Review Letters 116 ( 23 ) 2016.6
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Physical Review Letters
© 2016 American Physical Society. The φ-Λ(1520) interference effect in the γp→K+K-p reaction has been measured for the first time in the energy range from 1.673 to 2.173 GeV. The relative phases between φ and Λ(1520) production amplitudes were obtained in the kinematic region where the two resonances overlap. The measurement results support strong constructive interference when K+K- pairs are observed at forward angles but destructive interference for proton emission at forward angles. Furthermore, the observed interference effect does not account for the s=2.1 GeV bump structure in forward differential cross sections for φ photoproduction. This fact suggests possible exotic structures such as a hidden-strangeness pentaquark state, a new Pomeron exchange, or rescattering processes via other hyperon states.
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The spin structure function g1p of the proton and a test of the Bjorken sum rule Reviewed
C. Adolphi, R. Akhunzyanov, T. Matsuda他
Physics Letters B 753 18 - 28 2016.2
Language：English Publishing type：Research paper (scientific journal)
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Longitudinal double spin asymmetries in single hadron quasi-real photoproduction at high p#DT#R Reviewed
C. Adolphi, R. Akhunzyanov, T. Matsuda他
Physics Letters B 753 573 - 579 2016.2
Language：English Publishing type：Research paper (scientific journal)
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Interplay among transversity induced asymmetries in hadron leptoproduction Reviewed
C. Adolphi, R. Akhunzyanov, T. Matsuda他
Physics Letters B 753 406 - 411 2016.2
Language：English Publishing type：Research paper (scientific journal)
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Adolph C., Akhunzyanov R., Alexeev M., Alexeev G., Amoroso A., Andrieux V., Anosov V., Augustyniak W., Austregesilo A., Azevedo C., Badełek B., Balestra F., Barth J., Beck R., Bedfer Y., Bernhard J., Bicker K., Bielert E., Birsa R., Bisplinghoff J., Bodlak M., Boer M., Bordalo P., Bradamante F., Braun C., Bressan A., Büchele M., Burtin E., Chang W., Chiosso M., Choi I., Chung S., Cicuttin A., Crespo M., Curiel Q., Dalla Torre S., Dasgupta S., Dasgupta S., Denisov O., Dhara L., Donskov S., Doshita N., Duic V., Dünnweber W., Dziewiecki M., Efremov A., Eversheim P., Eyrich W., Faessler M., Ferrero A., Finger M., Finger M., Fischer H., Franco C., du Fresne von Hohenesche N., Friedrich J., Frolov V., Fuchey E., Gautheron F., Gavrichtchouk O., Gerassimov S., Giordano F., Gnesi I., Gorzellik M., Grabmüller S., Grasso A., Grosse Perdekamp M., Grube B., Grussenmeyer T., Guskov A., Haas F., Hahne D., von Harrach D., Hashimoto R., Heinsius F., Herrmann F., Hinterberger F., Horikawa N., d'Hose N., Hsieh C., Huber S.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 753 573 - 579 2016.2
Language：English Publishing type：Research paper (scientific journal) Publisher：Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
© 2015 The Authors. We measured the longitudinal double spin asymmetries A LL for single hadron muoproduction off protons and deuterons at photon virtuality Q 2 < 1(GeV/c) 2 for transverse hadron momenta p T in the range 1 GeV/c to 4 GeV/c. They were determined using COMPASS data taken with a polarised muon beam of 160 GeV/c or 200 GeV/c impinging on polarised 6 LiD or NH 3 targets. The experimental asymmetries are compared to next-to-leading order pQCD calculations, and are sensitive to the gluon polarisation δG inside the nucleon in the range of the nucleon momentum fraction carried by gluons 0.05 < x g < 0.2.
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Adolph C., Akhunzyanov R., Alexeev M., Alexeev G., Amoroso A., Andrieux V., Anosov V., Austregesilo A., Azevedo C., Badełek B., Balestra F., Barth J., Baum G., Beck R., Bedfer Y., Bernhard J., Bicker K., Bielert E., Birsa R., Bisplinghoff J., Bodlak M., Boer M., Bordalo P., Bradamante F., Braun C., Bressan A., Büchele M., Burtin E., Capozza L., Chang W., Chiosso M., Choi I., Chung S., Cicuttin A., Crespo M., Curiel Q., Dalla Torre S., Dasgupta S., Dasgupta S., Denisov O., Dhara L., Donskov S., Doshita N., Duic V., Dziewiecki M., Efremov A., Eversheim P., Eyrich W., Ferrero A., Finger M., Finger M., Fischer H., Franco C., du Fresne von Hohenesche N., Friedrich J., Frolov V., Fuchey E., Gautheron F., Gavrichtchouk O., Gerassimov S., Giordano F., Gnesi I., Gorzellik M., Grabmüller S., Grasso A., Grosse-Perdekamp M., Grube B., Grussenmeyer T., Guskov A., Haas F., Hahne D., von Harrach D., Hashimoto R., Heinsius F., Herrmann F., Hinterberger F., Horikawa N., d'Hose N., Hsieh C., Huber S.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 753 18 - 28 2016.2
Language：English Publishing type：Research paper (scientific journal) Publisher：Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
© 2015 The Authors. New results for the double spin asymmetry A p 1 and the proton longitudinal spin structure function g1p are presented. They were obtained by the COMPASS Collaboration using polarised 200 GeV muons scattered off a longitudinally polarised NH 3 target. The data were collected in 2011 and complement those recorded in 2007 at 160 GeV, in particular at lower values of x. They improve the statistical precision of g p 1 (x) by about a factor of two in the region x ≲0.02. A next-to-leading order QCD fit to the g 1 world data is performed. It leads to a new determination of the quark spin contribution to the nucleon spin, δσ, ranging from 0.26 to 0.36, and to a re-evaluation of the first moment of g1p. The uncertainty of δσ is mostly due to the large uncertainty in the present determinations of the gluon helicity distribution. A new evaluation of the Bjorken sum rule based on the COMPASS results for the non-singlet structure function g NS 1 (x,Q 2 ) yields as ratio of the axial and vector coupling constants |g A /g V |=1.22 ± 0.05 (stat.) ± 0.10 (syst.), which validates the sum rule to an accuracy of about 9%.
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Interplay among transversity induced asymmetries in hadron leptoproduction
Adolph C., Akhunzyanov R., Alexeev M., Alexeev G., Amoroso A., Andrieux V., Anosov V., Augustyniak W., Austregesilo A., Azevedo C., Badełek B., Balestra F., Barth J., Beck R., Bedfer Y., Bernhard J., Bicker K., Bielert E., Birsa R., Bisplinghoff J., Bodlak M., Boer M., Bordalo P., Bradamante F., Braun C., Bressan A., Büchele M., Burtin E., Chang W., Chiosso M., Choi I., Chung S., Cicuttin A., Crespo M., Curiel Q., d'Hose N., Dalla Torre S., Dasgupta S., Dasgupta S., Denisov O., Dhara L., Donskov S., Doshita N., Duic V., Dziewiecki M., Efremov A., Elia C., Eversheim P., Eyrich W., Ferrero A., Finger M., Finger M., Fischer H., Franco C., du Fresne von Hohenesche N., Friedrich J., Frolov V., Fuchey E., Gautheron F., Gavrichtchouk O., Gerassimov S., Giordano F., Gnesi I., Gorzellik M., Grabmüller S., Grasso A., Grosse Perdekamp M., Grube B., Grussenmeyer T., Guskov A., Haas F., Hahne D., von Harrach D., Hashimoto R., Heinsius F., Herrmann F., Hinterberger F., Horikawa N., Hsieh C., Huber S.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 753 406 - 411 2016.2
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
© 2015 The Authors. In the fragmentation of a transversely polarized quark several left-right asymmetries are possible for the hadrons in the jet. When only one unpolarized hadron is selected, it exhibits an azimuthal modulation known as the Collins effect. When a pair of oppositely charged hadrons is observed, three asymmetries can be considered, a di-hadron asymmetry and two single hadron asymmetries. In lepton deep inelastic scattering on transversely polarized nucleons all these asymmetries are coupled with the transversity distribution. From the high statistics COMPASS data on oppositely charged hadron-pair production we have investigated for the first time the dependence of these three asymmetries on the difference of the azimuthal angles of the two hadrons. The similarity of transversity induced single and di-hadron asymmetries is discussed. A new analysis of the data allows quantitative relationships to be established among them, providing for the first time strong experimental indication that the underlying fragmentation mechanisms are all driven by a common physical process.
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Excitation energy measurement of <sup>92</sup>Nb by 53MeV <sup>93</sup>Nb(p,d) reaction
Taniue K., Goto S., Maeda Y., Matsuda T., Sakaguchi H., Yamamoto T., Oe S., Shinoda T.
Meeting Abstracts of the Physical Society of Japan 71 ( 0 ) 172 - 172 2016
Language：English Publishing type：Research paper (scientific journal) Publisher：The Physical Society of Japan
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Observation of a New Narrow Axial-Vector Meson a＃D1＃R(1420) Reviewed
C. Adolph, R. Akhunzyanov, T. Matsuda他
Physical Review Letters 115 ( 8 ) 082001 - 6pp. 2015.8
Language：English Publishing type：Research paper (scientific journal)
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Observation of a New Narrow Axial-Vector Meson a<inf>1</inf>(1420) Reviewed
Adolph C., Akhunzyanov R., Alexeev M., Alexeev G., Amoroso A., Andrieux V., Anosov V., Austregesilo A., Azevedo C., Badełek B., Balestra F., Barth J., Beck R., Bedfer Y., Bernhard J., Bicker K., Bielert E., Birsa R., Bisplinghoff J., Bodlak M., Boer M., Bordalo P., Bradamante F., Braun C., Bressan A., Büchele M., Burtin E., Chang W., Chiosso M., Choi I., Chung S., Cicuttin A., Crespo M., Curiel Q., Dalla Torre S., Dasgupta S., Dasgupta S., Denisov O., Dhara L., Donskov S., Doshita N., Dünnweber W., Duic V., Dziewiecki M., Efremov A., Eversheim P., Eyrich W., Faessler M., Ferrero A., Finger M., Finger M., Fischer H., Franco C., Du Fresne Von Hohenesche N., Friedrich J., Frolov V., Gautheron F., Gavrichtchouk O., Gerassimov S., Gnesi I., Gorzellik M., Grabmüller S., Grasso A., Grosse-Perdekamp M., Grube B., Grussenmeyer T., Guskov A., Haas F., Hahne D., Von Harrach D., Hashimoto R., Heinsius F., Herrmann F., Hinterberger F., Horikawa N., D'Hose N., Hsieh C., Huber S., Ishimoto S., Ivanov A.
Physical Review Letters 115 ( 8 ) 2015.8
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review Letters
© 2015 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. The COMPASS Collaboration at CERN has measured diffractive dissociation of 190GeV/c pions into the π - π - π + final state using a stationary hydrogen target. A partial-wave analysis (PWA) was performed in bins of 3π mass and four-momentum transfer using the isobar model and the so far largest PWA model consisting of 88 waves. A narrow peak is observed in the f 0 (980)π channel with spin, parity and C-parity quantum numbers J PC =1 ++ . We present a resonance-model study of a subset of the spin-density matrix selecting 3π states with J PC =2 ++ and 4 ++ decaying into ρ(770)π and with J PC =1 ++ decaying into f 0 (980)π. We identify a new a 1 meson with mass (1414 -13 +15 )MeV/c 2 and width (153 -23 +8 )MeV/c 2 . Within the final states investigated in our analysis, we observe the new a 1 (1420) decaying only into f 0 (980)π, suggesting its exotic nature.
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C. Adolphh, R. Akhunzyanov, T. Matsuda他
Physics Letters B 744 250 - 259 2015.5
Language：English Publishing type：Research paper (scientific journal)
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The COMPASS setup for physics with hadron beams Reviewed
P. Abbon, C. Adolph, T. Matsuda et al.
Nuclear Instruments and Methods in Physics Research A 779 69 - 115 2015.4
Language：English Publishing type：Research paper (scientific journal)
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The COMPASS setup for physics with hadron beams Reviewed
Abbon P., Adolph C., Akhunzyanov R., Alexandrov Y., Alexeev M., Alexeev G., Amoroso A., Andrieux V., Anosov V., Austregesilo A., Badełek B., Balestra F., Barth J., Baum G., Beck R., Bedfer Y., Berlin A., Bernhard J., Bicker K., Bielert E., Bieling J., Birsa R., Bisplinghoff J., Bodlak M., Boer M., Bordalo P., Bradamante F., Braun C., Bressan A., Büchele M., Burtin E., Capozza L., Ciliberti P., Chiosso M., Chung S., Cicuttin A., Colantoni M., Cotte D., Crespo M., Curiel Q., Dafni T., Dalla Torre S., Dasgupta S., Dasgupta S., Denisov O., Desforge D., Dinkelbach A., Donskov S., Doshita N., Duic V., Dünnweber W., Durand D., Dziewiecki M., Efremov A., Elia C., Eversheim P., Eyrich W., Faessler M., Ferrero A., Finger M., Finger M., Fischer H., Franco C., Du Fresne Von Hohenesche N., Friedrich J., Frolov V., Gatignon L., Gautheron F., Gavrichtchouk O., Gerassimov S., Geyer R., Giganon A., Gnesi I., Gobbo B., Goertz S., Gorzellik M., Grabmüller S., Grasso A., Gregori M., Grube B., Grussenmeyer T., Guskov A.
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 779 69 - 115 2015.4
Language：English Publishing type：Research paper (scientific journal) Publisher：Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
© 2015 Elsevier B.V. All rights reserved. The main characteristics of the COMPASS experimental setup for physics with hadron beams are described. This setup was designed to perform exclusive measurements of processes with several charged and/or neutral particles in the final state. Making use of a large part of the apparatus that was previously built for spin structure studies with a muon beam, it also features a new target system as well as new or upgraded detectors. The hadron setup is able to operate at the high incident hadron flux available at CERN. It is characterised by large angular and momentum coverages, large and nearly flat acceptances, and good two and three-particle mass resolutions. In 2008 and 2009 it was successfully used with positive and negative hadron beams and with liquid hydrogen and solid nuclear targets. This paper describes the new and upgraded detectors and auxiliary equipment, outlines the reconstruction procedures used, and summarises the general performance of the setup.
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Search for exclusive photoproduction of Z± c (3900) at COMPASS Reviewed
C. Adolph, R. Akhunzyanov, T. Matsuda et al.
Physics Letters B 742 330 - 334 2015.3
Language：English Publishing type：Research paper (scientific journal)
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Search for exclusive photoproduction of Zc±(3900) at COMPASS Reviewed
Adolph C., Akhunzyanov R., Alexeev M., Alexeev G., Amoroso A., Andrieux V., Anosov V., Austregesilo A., Badełek B., Balestra F., Barth J., Baum G., Beck R., Bedfer Y., Berlin A., Bernhard J., Bicker K., Bielert E., Bieling J., Birsa R., Bisplinghoff J., Bodlak M., Boer M., Bordalo P., Bradamante F., Braun C., Bressan A., Büchele M., Burtin E., Capozza L., Chiosso M., Chung S., Cicuttin A., Crespo M., Curiel Q., Dalla Torre S., Dasgupta S., Dasgupta S., Denisov O., Donskov S., Doshita N., Duic V., Dünnweber W., Dziewiecki M., Efremov A., Elia C., Eversheim P., Eyrich W., Faessler M., Ferrero A., Filin A., Finger M., Finger M., Fischer H., Franco C., du Fresne von Hohenesche N., Friedrich J., Frolov V., Gautheron F., Gavrichtchouk O., Gerassimov S., Geyer R., Gnesi I., Gobbo B., Goertz S., Gorzellik M., Grabmüller S., Grasso A., Grube B., Grussenmeyer T., Guskov A., Haas F., von Harrach D., Hahne D., Hashimoto R., Heinsius F., Herrmann F., Hinterberger F., Höppner C., Horikawa N., d'Hose N., Huber S.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 742 330 - 334 2015.3
Language：English Publishing type：Research paper (scientific journal) Publisher：Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
© 2015 The Authors. A search for the exclusive production of the Zc±(3900) hadron by virtual photons has been performed in the channel Zc±(3900)→J/ψπ±. The data cover the range from 7 GeV to 19 GeV in the centre-of-mass energy of the photon-nucleon system. The full set of the COMPASS data set collected with a muon beam between 2002 and 2011 has been used. An upper limit for the ratio BR(Zc±(3900)→J/ψπ±)×σγN→Zc±(3900)N/σγN→J/ψN of 3.7×10 -3 has been established at the confidence level of 90%.
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Measurement of the Charged-Pion Polarizability Reviewed
C. Adolph, R. Akhunzyanov, T. Matsuda et al.
PHYSICAL REVIEW LETTERS 114 062002_1 - 062002_16 2015.2
Language：English Publishing type：Research paper (scientific journal)
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Measurement of the charged-pion polarizability Reviewed
Adolph C., Akhunzyanov R., Alexeev M., Alexeev G., Amoroso A., Andrieux V., Anosov V., Austregesilo A., Badełek B., Balestra F., Barth J., Baum G., Beck R., Bedfer Y., Berlin A., Bernhard J., Bicker K., Bieling J., Birsa R., Bisplinghoff J., Bodlak M., Boer M., Bordalo P., Bradamante F., Braun C., Bressan A., Büchele M., Burtin E., Capozza L., Chiosso M., Chung S., Cicuttin A., Colantoni M., Crespo M., Curiel Q., Dalla Torre S., Dasgupta S., Dasgupta S., Denisov Y., Dinkelbach A., Donskov S., Doshita N., Duic V., Dünnweber W., Dziewiecki M., Efremov A., Elia C., Eversheim P., Eyrich W., Faessler M., Ferrero A., Filin A., Finger M., Finger M., Fischer H., Franco C., Du Fresne Von Hohenesche N., Friedrich J., Frolov V., Gautheron F., Gavrichtchouk O., Gerassimov S., Geyer R., Gnesi I., Gobbo B., Goertz S., Gorzellik M., Grabmüller S., Grasso A., Grube B., Grussenmeyer T., Guskov A., Guthörl T., Haas F., Von Harrach D., Hahne D., Hashimoto R., Heinsius F., Herrmann F., Hinterberger F., Höppner C., Horikawa N., D'Hose N., Huber S., Ishimoto S., Ivanov A.
Physical Review Letters 114 ( 6 ) 2015.2
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review Letters
© 2015 Published by American Physical Society. The COMPASS collaboration at CERN has investigated pion Compton scattering, π-γ→π-γ, at center-of-mass energy below 3.5 pion masses. The process is embedded in the reaction π-Ni→π-γNi, which is initiated by 190 GeV pions impinging on a nickel target. The exchange of quasireal photons is selected by isolating the sharp Coulomb peak observed at smallest momentum transfers, Q2 < 0.0015(GeV/c)2. From a sample of 63000 events, the pion electric polarizability is determined to be απ=(2.0±0.6stat±0.7syst)×10-4fm3 under the assumption απ=-βπ, which relates the electric and magnetic dipole polarizabilities. It is the most precise measurement of this fundamental low-energy parameter of strong interaction that has been addressed since long by various methods with conflicting outcomes. While this result is in tension with previous dedicated measurements, it is found in agreement with the expectation from chiral perturbation theory. An additional measurement replacing pions by muons, for which the cross-section behavior is unambiguously known, was performed for an independent estimate of the systematic uncertainty.
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Adolph C., Akhunzyanov R., Alexeev M., Alexeev G., Amoroso A., Andrieux V., Anosov V., Austregesilo A., Badełek B., Balestra F., Barth J., Baum G., Beck R., Bedfer Y., Berlin A., Bernhard J., Bicker K., Bielert E., Bieling J., Birsa R., Bisplinghoff J., Bodlak M., Boer M., Bordalo P., Bradamante F., Braun C., Bressan A., Büchele M., Burtin E., Capozza L., Chiosso M., Chung S., Cicuttin A., Crespo M., Curiel Q., Dalla Torre S., Dasgupta S., Dasgupta S., Denisov O., Donskov S., Doshita N., Duic V., Dünnweber W., Dziewiecki M., Efremov A., Elia C., Eversheim P., Eyrich W., Faessler M., Ferrero A., Finger M., Finger M., Fischer H., Franco C., du Fresne von Hohenesche N., Friedrich J., Frolov V., Gautheron F., Gavrichtchouk O., Gerassimov S.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 740 303 - 311 2015.1
Language：English Publishing type：Research paper (scientific journal) Publisher：Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
© 2014 The Authors. Exclusive production of ηπ - and η ' π - has been studied with a 191 GeV/c π - beam impinging on a hydrogen target at COMPASS (CERN). Partial-wave analyses reveal different odd/even angular momentum (L) characteristics in the inspected invariant mass range up to 3 GeV/c 2 . A striking similarity between the two systems is observed for the L=2, 4, 6 intensities (scaled by kinematical factors) and the relative phases. The known resonances a 2 (1320) and a 4 (2040) are in line with this similarity. In contrast, a strong enhancement of η ' π - over ηπ - is found for the L=1, 3, 5 waves, which carry non-qq- quantum numbers. The L=1 intensity peaks at 1.7 GeV/c 2 in η ' π - and at 1.4 GeV/c 2 in ηπ - , the corresponding phase motions with respect to L=2 are different.
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Odd and even partial waves of ηπ− and η'π− in π− p →η'π− p Reviewed
C. Adolph, R. Akhunzyanov, T. Matsuda et al.
PhysicsLettersB 740 303 - 311 2015.1
Language：English Publishing type：Research paper (scientific journal)
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Adolph C., Akhunzyanov R., Alexeev M., Alexeev G., Amoroso A., Andrieux V., Anosov V., Austregesilo A., Badełek B., Balestra F., Barth J., Baum G., Beck R., Bedfer Y., Berlin A., Bernhard J., Bicker K., Bielert E., Bieling J., Birsa R., Bisplinghoff J., Bodlak M., Boer M., Bordalo P., Bradamante F., Braun C., Bressan A., Büchele M., Burtin E., Capozza L., Chiosso M., Chung S., Cicuttin A., Crespo M., Curiel Q., Dalla Torre S., Dasgupta S., Dasgupta S., Denisov O., Donskov S., Doshita N., Duic V., Dünnweber W., Dziewiecki M., Efremov A., Elia C., Eversheim P., Eyrich W., Faessler M., Ferrero A., Finger M., Finger M., Fischer H., Franco C., du Fresne von Hohenesche N., Friedrich J., Frolov V., Gautheron F., Gavrichtchouk O., Gerassimov S., Geyer R., Gnesi I., Gobbo B., Goertz S., Gorzellik M., Grabmüller S., Grasso A., Grube B., Grussenmeyer T., Guskov A., Haas F., von Harrach D., Hahne D., Hashimoto R., Heinsius F., Herrmann F., Hinterberger F., Höppner C., Horikawa N., d'Hose N., Huber S.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 744 250 - 259 2015
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
© 2015. Measurements of the Collins and Sivers asymmetries for charged pions and charged and neutral kaons produced in semi-inclusive deep-inelastic scattering of high energy muons off transversely polarised protons are presented. The results were obtained using all the available COMPASS proton data, which were taken in the years 2007 and 2010. The Collins asymmetries exhibit in the valence region a non-zero signal for pions and there are hints of non-zero signal also for kaons. The Sivers asymmetries are found to be positive for positive pions and kaons and compatible with zero otherwise.
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The Physics of the B Factories Reviewed
A. J. Bevan, B. Golob, T. Matsuda et al.
Eur. Phys. J. C 74 3026_1 - 3026_928 2014.11
Language：English Publishing type：Research paper (scientific journal)
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The Physics of the B Factories Reviewed
Bevan A., Golob B., Mannel T., Prell S., Yabsley B., Aihara H., Anulli F., Arnaud N., Aushev T., Beneke M., Beringer J., Bianchi F., Bigi I., Bona M., Brambilla N., Brodzicka J., Chang P., Charles M., Cheng C., Cheng H., Chistov R., Colangelo P., Coleman J., Drutskoy A., Druzhinin V., Eidelman S., Eigen G., Eisner A., Faccini R., Flood K., Gambino P., Gaz A., Gradl W., Hayashii H., Higuchi T., Hulsbergen W., Hurth T., Iijima T., Itoh R., Jackson P., Kass R., Kolomensky Y., Kou E., Križan P., Kronfeld A., Kumano S., Kwon Y., Latham T., Leith D., Lüth V., Martinez-Vidal F., Meadows B., Mussa R., Nakao M., Nishida S., Ocariz J., Olsen S., Pakhlov P., Pakhlova G., Palano A., Pich A., Playfer S., Poluektov A., Porter F., Robertson S., Roney J., Roodman A., Sakai Y., Schwanda C., Schwartz A., Seidl R., Sekula S., Steinhauser M., Sumisawa K., Swanson E., Tackmann F., Trabelsi K., Uehara S., Uno S., van de Water R., Vasseur G., Verkerke W.
European Physical Journal C 74 ( 11 ) 1 - 928 2014.11
Language：English Publishing type：Research paper (scientific journal) Publisher：European Physical Journal C
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A high-statistics measurement of transverse spin effects in dihadron Reviewed
C. Adolph, R. Akhunzyanov, T. Matsuda et al.
Physics Letters B 736 124 - 131 2014.9
Language：English Publishing type：Research paper (scientific journal)
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Adolph C., Akhunzyanov R., Alekseev M., Alexandrov Y., Alexeev G., Amoroso A., Andrieux V., Anosov V., Austregesilo A., Badełek B., Balestra F., Barth J., Baum G., Beck R., Bedfer Y., Berlin A., Bernhard J., Bertini R., Bicker K., Bieling J., Birsa R., Bisplinghoff J., Bodlak M., Boer M., Bordalo P., Bradamante F., Braun C., Bravar A., Bressan A., Büchele M., Burtin E., Capozza L., Chiosso M., Chung S., Cicuttin A., Crespo M., Curiel Q., Dalla Torre S., Dasgupta S., Dasgupta S., Denisov O., Donskov S., Doshita N., Duic V., Dünnweber W., Dziewiecki M., Efremov A., Elia C., Eversheim P., Eyrich W., Faessler M., Ferrero A., Filin A., Finger M., Finger M., Fischer H., Franco C., du Fresne von Hohenesche N., Friedrich J., Frolov V., Garfagnini R., Gautheron F., Gavrichtchouk O., Gerassimov S., Geyer R., Giorgi M., Gnesi I., Gobbo B., Goertz S., Gorzellik M., Grabmüller S., Grasso A., Grube B., Guskov A., Guthörl T., Haas F., von Harrach D., Hahne D., Hashimoto R., Heinsius F.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 736 124 - 131 2014.9
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
A measurement of the azimuthal asymmetry in dihadron production in deep-inelastic scattering of muons on transversely polarised proton (NH 3 ) targets is presented. They provide independent access to the transversity distribution functions through the measurement of the Collins asymmetry in single hadron production. The data were taken in the year 2010 with the COMPASS spectrometer using a 160 GeV/c muon beam of the CERN SPS, increasing by a factor of about four the overall statistics with respect to the previously published data taken in the year 2007. The measured sizeable asymmetry is in good agreement with the published data. An approximate equality of the Collins asymmetry and the dihadron asymmetry is observed, suggesting a common physical mechanism in the underlying fragmentation. © 2014 The Authors.
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Spin alignment and violation of the OZI rule in exclusive ω and φ production in pp collisions Reviewed
C.Adolph, R.Akhunzyanov, T. Matsuda et al.
Nuclear Physics B 886 1078 - 1101 2014.9
Language：English Publishing type：Research paper (scientific journal)
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Measurement of azimuthal hadron asymmetries in semi-inclusive deep inelastic scattering off unpolarised nucleons Reviewed
C.Adolph, R.Akhunzyanov, T. Matsuda et al.
Nuclear Physics B 886 1046 2014.9
Language：English Publishing type：Research paper (scientific journal)
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Adolph C., Akhunzyanov R., Alexeev M., Alexandrov Y., Alexeev G., Amoroso A., Andrieux V., Anosov V., Austregesilo A., Badełek B., Balestra F., Barth J., Baum G., Beck R., Bedfer Y., Berlin A., Bernhard J., Bertini R., Bicker K., Bieling J., Birsa R., Bisplinghoff J., Bodlak M., Boer M., Bordalo P., Bradamante F., Braun C., Bravar A., Bressan A., Büchele M., Burtin E., Capozza L., Chiosso M., Chung S., Cicuttin A., Crespo M., Curiel Q., Dalla Torre S., Dasgupta S., Dasgupta S., Denisov O., Donskov S., Doshita N., Duic V., Dünnweber W., Dziewiecki M., Efremov A., Elia C., Eversheim P., Eyrich W., Faessler M., Ferrero A., Filin A., Finger M., Finger J., Fischer H., Franco C., du Fresne von Hohenesche N., Friedrich J., Frolov V., Garfagnini R., Gautheron F., Gavrichtchouk O., Gerassimov S., Geyer R., Giorgi M., Gnesi I., Gobbo B., Goertz S., Gorzellik M., Grabmüller S., Grasso A., Grube B., Guskov A., Guthörl T., Haas F., von Harrach D., Hahne D., Hashimoto R., Heinsius F.
Nuclear Physics B 886 1046 - 1077 2014.9
Language：English Publishing type：Research paper (scientific journal) Publisher：Nuclear Physics B
Spin-averaged asymmetries in the azimuthal distributions of positive and negative hadrons produced in deep inelastic scattering were measured using the CERN SPS longitudinally polarised muon beam at 160GeV/c and a 6 LiD target. The amplitudes of the three azimuthal modulations cos φh , cos 2 φh and sin φh were obtained binning the data separately in each of the relevant kinematic variables x, z or pTh and binning in a three-dimensional grid of these three variables. The amplitudes of the cos φh and cos 2 φh modulations show strong kinematic dependencies both for positive and negative hadrons. © 2014 CERN for the benefit of the COMPASS Collaboration.
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Spin alignment and violation of the OZI rule in exclusive ω and φ production in pp collisions Reviewed
Adolph C., Akhunzyanov R., Alexeev M., Alexeev G., Amoroso A., Andrieux V., Anosov V., Austregesilo A., Badełek B., Balestra F., Barth J., Baum G., Beck R., Bedfer Y., Berlin A., Bernhard J., Bicker K., Bieling J., Birsa R., Bisplinghoff J., Bodlak M., Boer M., Bordalo P., Bradamante F., Braun C., Bressan A., Büchele M., Burtin E., Capozza L., Chiosso M., Chung S., Cicuttin A., Crespo M., Curiel Q., Dalla Torre S., Dasgupta S., Dasgupta S., Denisov O., Donskov S., Doshita N., Duic V., Dünnweber W., Dziewiecki M., Efremov A., Elia C., Eversheim P., Eyrich W., Faessler M., Ferrero A., Filin A., Finger M., Finger M., Fischer H., Franco C., du Fresne von Hohenesche N., Friedrich J., Frolov V., Gautheron F., Gavrichtchouk O., Gerassimov S., Geyer R., Gnesi I., Gobbo B., Goertz S., Gorzellik M., Grabmüller S., Grasso A., Grube B., Grussenmeyer T., Guskov A., Guthörl T., Haas F., von Harrach D., Hahne D., Hashimoto R., Heinsius F., Herrmann F., Hinterberger F., Höppner C., Horikawa N., d'Hose N., Huber S.
Nuclear Physics B 886 1078 - 1101 2014.9
Language：English Publishing type：Research paper (scientific journal) Publisher：Nuclear Physics B
Exclusive production of the isoscalar vector mesons ω and φ is measured with a 190GeV/c proton beam impinging on a liquid hydrogen target. Cross section ratios are determined in three intervals of the Feynman variable xF of the fast proton. A significant violation of the OZI rule is found, confirming earlier findings. Its kinematic dependence on xF and on the invariant mass M p V of the system formed by fast proton pfast and vector meson V is discussed in terms of diffractive production of pfast V resonances in competition with central production. The measurement of the spin density matrix element ρ00 of the vector mesons in different selected reference frames provides another handle to distinguish the contributions of these two major reaction types. Again, dependences of the alignment on xF and on M p V are found. Most of the observations can be traced back to the existence of several excited baryon states contributing to ω production which are absent in the case of the φ meson. Removing the low-mass M p V resonant region, the OZI rule is found to be violated by a factor of eight, independently of xF . © 2014 CERN for the benefit of the COMPASS Collaboration.
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A 2.5mlongliquidhydrogentargetforCOMPASS Reviewed
E. Bielert, J.Bremer, T. Matsuda et al.
Nuclear Instrumentsand Methodsin Physics Research A 746 20 - 25 2014.5
Language：English Publishing type：Research paper (scientific journal)
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A 2.5 m long liquid hydrogen target for COMPASS
Bielert E., Bremer J., Doshita N., Geyer R., Hashimoto R., Horikawa N., Ishimoto S., Iwata T., Kondo K., Mallot G., Matsuda H., Matsuda T., Miyachi Y., Nukazuka G., Pirotte O., Suzuki H., Suzuki S., Vullierme B.
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 746 20 - 25 2014.5
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
A 2.5 m long liquid hydrogen target has been developed for the COMPASS experiment at CERN to investigate the nucleon spin structure via the Deeply Virtual Compton Scattering (DVCS) process. To recognize exclusive DVCS events, produced photons and slow protons need to be detected. In order to do so, the material budget around the target has to be minimal. A 0.125 mm thick Kapton® target cell and a 1 mm thick carbon fiber vacuum chamber with a Mylar® window have been constructed and tested. Finally, the target system was successfully employed during the DVCS pilot run in COMPASS at the end of 2012. The objective of this paper is to give a detailed description of this newly developed liquid hydrogen target apparatus. © 2014 The Authors.
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Transverse target spin asymmetries in exclusive ρ0 muoproduction Reviewed
C. Adolph, R. Akhunzyanov, T. Matsuda et al.
Physics Letters B 731 19 - 26 2014.4
Language：English Publishing type：Research paper (scientific journal)
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Transverse target spin asymmetries in exclusive <sup>ρ0</sup> muoproduction Reviewed
Adolph C., Akhunzyanov R., Alekseev M., Alexakhin V., Alexandrov Y., Alexeev G., Amoroso A., Andrieux V., Anosov V., Austregesilo A., Badełek B., Balestra F., Barth J., Baum G., Beck R., Bedfer Y., Berlin A., Bernhard J., Bertini R., Bicker K., Bieling J., Birsa R., Bisplinghoff J., Bodlak M., Boer M., Bordalo P., Bradamante F., Braun C., Bravar A., Bressan A., Büchele M., Burtin E., Capozza L., Chiosso M., Chung S., Cicuttin A., Crespo M., Curiel Q., Dalla Torre S., Dasgupta S., Dasgupta S., Denisov O., Donskov S., Doshita N., Duic V., Dünnweber W., Dziewiecki M., Efremov A., Elia C., Eversheim P., Eyrich W., Faessler M., Ferrero A., Filin A., Finger M., Finger M., Fischer H., Franco C., Du Fresne Von Hohenesche N., Friedrich J., Frolov V., Garfagnini R., Gautheron F., Gavrichtchouk O., Gerassimov S., Geyer R., Giorgi M., Gnesi I., Gobbo B., Goertz S., Gorzellik M., Grabmüller S., Grasso A., Grube B., Gushterski R., Guskov A., Guthörl T., Haas F., Von Harrach D.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 731 19 - 26 2014.4
Language：English Publishing type：Research paper (scientific journal) Publisher：Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Exclusive production of < sup > ρ0 < /sup > mesons was studied at the COMPASS experiment by scattering 160GeV/c muons off transversely polarised protons. Five single-spin and three double-spin azimuthal asymmetries were measured as a function of < sup > Q2 < /sup > , < inf > x B j < /inf > , or pT2. The sin < inf > φS < /inf > asymmetry is found to be -0.019 ± 0.008(stat) ± 0.003(syst). All other asymmetries are also found to be of small magnitude and consistent with zero within experimental uncertainties. Very recent calculations using a GPD-based model agree well with the present results. The data is interpreted as evidence for the existence of chiral-odd, transverse generalized parton distributions. © 2014 Elsevier B.V.
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Measurement of radiative widths of a＃D2＃R(1320) and π＃D2＃R(1670) Reviewed
C. Adolph, R. Akhunzyanov, T. Matsuda et al.
Eur. Phys. J. A 50 ( 4 ) 79_1 - 79_19 2014.4
Language：English Publishing type：Research paper (scientific journal)
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Search for the K− bound state via γd→K+ π− Xreaction at Eγ =1.5–2.4 GeV Reviewed
A.O.Tokiyasu, M.Niiyama, T. Matsuda et al.
Physics Letters B 728 616 - 621 2014.1
Language：English Publishing type：Research paper (scientific journal)
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Measurement of radiative widths of a<inf>2</inf>(1320) and π<inf>2</inf>(1670) Reviewed
Adolph C., Akhunzyanov R., Alexeev M., Alexeev G., Amoroso A., Andrieux V., Anosov V., Austregesilo A., Badełek B., Balestra F., Barth J., Baum G., Beck R., Bedfer Y., Berlin A., Bernhard J., Bicker K., Bieling J., Birsa R., Bisplinghoff J., Bodlak M., Boer M., Bordalo P., Bradamante F., Braun C., Bressan A., Büchele M., Burtin E., Capozza L., Chiosso M., Chung S., Cicuttin A., Crespo M., Curiel Q., Torre S., Dasgupta S., Dasgupta S., Denisov O., Donskov S., Doshita N., Duic V., Dünnweber W., Dziewiecki M., Efremov A., Elia C., Eversheim P., Eyrich W., Faessler M., Ferrero A., Filin A., Finger M., Finger M., Fischer H., Franco C., du von Hohenesche F., Friedrich J., Frolov V., Gautheron F., Gavrichtchouk O., Gerassimov S., Geyer R., Gnesi I., Gobbo B., Goertz S., Gorzellik M., Grabmuller S., Grasso A., Grube B., Guskov A., Guthörl T., Haas F., Von Harrach D., Hahne D., Hashimoto R., Heinsius F., Herrmann F., Hinterberger F., Hoppner C., Horikawa N.
European Physical Journal A 50 ( 4 ) 1 - 19 2014
Language：English Publishing type：Research paper (scientific journal) Publisher：European Physical Journal A
The COMPASS Collaboration at CERN has investigated the reaction π̄γ → π̄π̄π + embedded in the Primakoff reaction of 190 GeV pions scattering in the Coulomb field of a lead target, π̄Pb → π̄π̄π + Pb. Exchange of quasi-real photons is selected by isolating the sharp Coulomb peak observed at momentum transfer below 0.001 (GeV/c) 2 . Using a partial-wave analysis the amplitudes and relative phases of the a 2 (1320) and π 2 (1670) mesons have been extracted, and the Coulomb and the diffractive contributions have been disentangled. Measuring absolute production cross sections we have determined the radiative width of the a 2 (1320) to be Γ 0 (a 2 (1320) → πγ) = (358 ± 6 stat ± 42 syst ) keV. As the first measurement, Γ 0 (π 2 (1670) → πγ) = (181 ± 11 stat ± 27 syst )keV · (BR f2π /BR/ f2π ) is obtained for the radiative width of the π 2 (1670), where in this analysis the branching ratio BRf f2π PDG = 0.56 has been used. We compare these values to previous measurements and theoretical predictions. © Societa Italiana di Fisica/Springer-Verlag 2014.
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B16 放射性セシウム汚染土壌の分級分析による減容化と農業用堰の受動的処理効果の検討(口頭発表,一般講演)
伊藤 健一, 伊原 昌史, 松田 達郎, 鈴木 正哉, 八田 珠郎, 山田 裕久
粘土科学討論会発表論文抄録 58 ( 0 ) 94 - 95 2014
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：日本粘土学会
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Measurement of the cross section for high-p T hadron production in the scattering of 160-GeV/c muons off nucleons Reviewed
C. Adolph, M.G. Alekseev, T. Matsuda et al.
Physical Review D 88 ( 9 ) 091101(R) - 8pp 2013.11
Language：English Publishing type：Research paper (scientific journal)
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Adolph C., Alekseev M., Alexakhin V., Alexandrov Y., Alexeev G., Amoroso A., Andrieux V., Austregesilo A., Badełek B., Balestra F., Barth J., Baum G., Bedfer Y., Berlin A., Bernhard J., Bertini R., Bicker K., Bieling J., Birsa R., Bisplinghoff J., Boer M., Bordalo P., Bradamante F., Braun C., Bravar A., Bressan A., Büchele M., Burtin E., Capozza L., Chiosso M., Chung S., Cicuttin A., Crespo M., Dalla Torre S., Dasgupta S., Dasgupta S., Denisov O., Donskov S., Doshita N., Duic V., Dünnweber W., Dziewiecki M., Efremov A., Elia C., Eversheim P., Eyrich W., Faessler M., Ferrero A., Filin A., Finger M., Finger M., Fischer H., Franco C., Du Fresne Von Hohenesche N., Friedrich J., Frolov V., Garfagnini R., Gautheron F., Gavrichtchouk O., Gerassimov S., Geyer R., Giorgi M., Gnesi I., Gobbo B., Goertz S., Grabmüller S., Grasso A., Grube B., Gushterski R., Guskov A., Guthörl T., Haas F., Von Harrach D., Heinsius F., Herrmann F., Heß C., Hinterberger F., Höppner C., Horikawa N., D'Hose N., Huber S., Ishimoto S., Ivanshin Y., Iwata T., Jahn R., Jary V., Jasinski P., Joosten R., Kabuß E., Kang D., Ketzer B., Khaustov G., Khokhlov Y., Kisselev Y., Klein F.
Physical Review D - Particles, Fields, Gravitation and Cosmology 88 ( 9 ) 2013.11
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review D - Particles, Fields, Gravitation and Cosmology
The differential cross section for the production of charged hadrons with high transverse momenta in the scattering of 160 GeV/c muons off nucleons at low photon virtualities has been measured at the COMPASS experiment at CERN. The results, which cover transverse momenta from 1.1 GeV/c to 3.6 GeV/c, are compared to a perturbative quantum chromodynamics (pQCD) calculation, in order to evaluate the applicability of pQCD to this process in the kinematic domain of the experiment. The shape of the calculated differential cross section as a function of transverse momentum is found to be in good agreement with the experimental data, but the absolute scale is underestimated by next-to-leading order pQCD. The inclusion of all-order resummation of large logarithmic threshold corrections reduces the discrepancy from a factor of 3 to 4 to a factor of 2. The dependence of the cross section on the pseudorapidity and on the virtual photon energy fraction is investigated. Finally the dependence on the charge of the hadrons is discussed. © 2013 American Physical Society.
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Study of Σ(1385) and Ξ(1321) hyperon and antihyperon production in deep inelastic muon scattering Reviewed
C. Adolph, M. G. Alekseev, T. Matsuda et al.
The European Physical Journal C 73 ( 10 ) 2581 - 9pp 2013.10
Language：English Publishing type：Research paper (scientific journal)
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Hadron transverse momentum distributions in muon deep inelastic scattering at 160 GeV/c Reviewed
C. Adolph, M. G. Alekseev, T. Matsuda et al.
The European Physical Journal C 73 ( 8 ) 2531 - 18pp 2013.8
Language：English Publishing type：Research paper (scientific journal)
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Hadron transverse momentum distributions in muon deep inelastic scattering at 160 GeV/c
Adolph C., Alekseev M., Alexakhin V., Alexandrov Y., Alexeev G., Amoroso A., Andrieux V., Austregesilo A., Badełek B., Balestra F., Barth J., Baum G., Bedfer Y., Berlin A., Bernhard J., Bertini R., Bicker K., Bieling J., Birsa R., Bisplinghoff J., Boer M., Bordalo P., Bradamante F., Braun C., Bravar A., Bressan A., Büchele M., Burtin E., Capozza L., Chiosso M., Chung S., Cicuttin A., Crespo M., Dalla Torre S., Dasgupta S., Dasgupta S., Denisov O., Donskov S., Doshita N., Duic V., Dünnweber W., Dziewiecki M., Efremov A., Elia C., Eversheim P., Eyrich W., Faessler M., Ferrero A., Filin A., Finger M., Finger M., Fischer H., Franco C., von Hohenesche N., Friedrich J., Frolov V., Garfagnini R., Gautheron F., Gavrichtchouk O., Gerassimov S., Geyer R., Giorgi M., Gnesi I., Gobbo B., Goertz S., Grabmüller S., Grasso A., Grube B., Gushterski R., Guskov A., Guthörl T., Haas F., von Harrach D., Heinsius F., Herrmann F., Heß C., Hinterberger F., Höppner C., Horikawa N., D’Hose N., Huber S., Ishimoto S., Ivanshin Y., Iwata T., Jahn R., Jary V., Jasinski P., Joosten R., Kabuß E., Kang D., Ketzer B., Khaustov G., Khokhlov Y.
European Physical Journal C 73 ( 8 ) 2013.8
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：European Physical Journal C
© 2013, The Author(s). Multiplicities of charged hadrons produced in deep inelastic muon scattering off a 6 LiD target have been measured as a function of the DIS variables x Bj , Q 2 , W 2 and the final state hadron variables p T and z. The p 2 T distributions are fitted with a single exponential function at low values of p 2 T to determine the dependence of 〈p 2 T 〉 on x Bj , Q 2 , W 2 and z. The z-dependence of 〈p 2 T 〉 is shown to be a potential tool to extract the average intrinsic transverse momentum squared of partons, 〈k 2 ⊥ 〉, as a function of x Bj and Q 2 in a leading order QCD parton model.
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Analysis of Radioactivity Concentration of Radioactive Caesium for Magnetically Separated Soils Reviewed
SASAKI Yuuki, ASAKI Satoru, IWATA Takahiro, TAJIMA Yasuhisa, MATSUDA Tatsuro, MIYACHI Yoshiyuki, NAKASHIMA Kazuo, NUKAZUKA Genki, YOSHIDA Hiroshi Y.
RADIOISOTOPES 62 ( 7 ) 461 - 464 2013.7
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japan Radioisotope Association
After the Fukushima Daiichi Nuclear Power Plant accident, soil collected in Fukushima Prefecture was separated into magnetic and non-magnetic parts with a magnet. Radioactivity of <sup>134</sup>Cs and <sup>137</sup>Cs was measured for each part. It was found that the radioactivity per weight of the magnetic part is 4 times as high as that of the non-magnetic part.
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福島県の磁性土壌に対する放射性セシウム濃度分析 Reviewed
佐々木侑輝、浅木了、岩田高広、田島靖久、松田達郎、宮地義之、中島和夫、糖塚元気、吉田浩司
Radioisotopes 62 ( 7 ) 461 - 464 2013.7
Language：Japanese Publishing type：Research paper (scientific journal)
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C. Adolph, M. G. Alekseev, T. Matsuda et al.
Physical Review D 87 ( 5 ) 052018 - 22 2013.3
Language：English Publishing type：Research paper (scientific journal)
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Leading order determination of the gluon polarisation from DIS events with high-pT hadron pairs
C. Adolph, M.G. Alekseev, T. Matsuda et al.
Physics Letters B 718 ( 3 ) 922 - 930 2013.1
Language：English Publishing type：Research paper (scientific journal)
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Adolph C., Alekseev M., Alexakhin V., Alexandrov Y., Alexeev G., Amoroso A., Antonov A., Austregesilo A., Badełek B., Balestra F., Barth J., Baum G., Bedfer Y., Bernhard J., Bertini R., Bettinelli M., Bicker K., Bieling J., Birsa R., Bisplinghoff J., Bordalo P., Bradamante F., Braun C., Bravar A., Bressan A., Burtin E., Chaberny D., Chiosso M., Chung S., Cicuttin A., Crespo M., Dalla Torre S., Das S., Dasgupta S., Denisov O., Dhara L., Donskov S., Doshita N., Duic V., Dünnweber W., Dziewiecki M., Efremov A., Elia C., Eversheim P., Eyrich W., Faessler M., Ferrero A., Filin A., Finger M., Finger M., Fischer H., Franco C., du Fresne von Hohenesche N., Friedrich J., Garfagnini R., Gautheron F., Gavrichtchouk O., Gazda R., Gerassimov S., Geyer R., Giorgi M., Gnesi I., Gobbo B., Goertz S., Grabmüller S., Grasso A., Grube B., Gushterski R., Guskov A., Guthörl T., Haas F., von Harrach D., Hedicke S., Heinsius F., Herrmann F., Heß C., Hinterberger F., Horikawa N., Höppner C., d'Hose N., Huber S., Ishimoto S., Ivanov O., Ivanshin Y., Iwata T., Jahn R., Jasinski P., Joosten R., Kabuß E., Kang D., Ketzer B., Khaustov G.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 718 ( 3 ) 922 - 930 2013.1
Language：English Publishing type：Research paper (scientific journal) Publisher：Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
We present a determination of the gluon polarisation δg/g in the nucleon, based on the longitudinal double-spin asymmetry of DIS events with Q 2 > 1(GeV/c) 2 including a pair of large transverse-momentum hadrons in the final state. The data were obtained by the COMPASS experiment at CERN using a 160 GeV/c polarised muon beam scattering off a polarised LiD6 target. The gluon polarisation is evaluated by a Neural Network approach for three intervals of the gluon momentum fraction x g covering the range 0.04 < x g < 0.27. The values obtained at leading order in QCD do not show any significant dependence on x g . Their average is δg/g=0.125±0.060(stat.)±0.063(syst.) at average x g =0.09 and a scale of μ 2 =3(GeV/c) 2 . © 2012 Elsevier B.V..
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D* and D Meson Production in Muon Nucleon Interactions at 160 GeV/c Reviewed
C. Adolph, M.G. Alekseev, T. Matsuda et al.
European Physical Journal C 72 ( 12 ) 2253 - 17 2012.12
Language：English Publishing type：Research paper (scientific journal)
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Exclusive ρ0 muoproduction on transversely polarised protons and deuterons Reviewed
C. Adolph, M.G. Alekseev, T. Matsuda et al.
Nuclear Physics B 865 ( 1 ) 1 - 20 2012.12
Language：English Publishing type：Research paper (scientific journal)
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C. Adolphh, M.G. Alekseev, T. Matsuda et al.
Physics Letters B 717 ( 4-5 ) 383 - 389 2012.10
Language：English Publishing type：Research paper (scientific journal)
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C. Adolph, M.G. Alekseev, T. Matsuda et al.
Physics Letters B 717 ( 4-5 ) 376 - 382 2012.10
Language：English Publishing type：Research paper (scientific journal)
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Transverse spin effects in hadron-pair production from semi-inclusive deep inelastic scattering Reviewed
C. Adolph, M.G. Alekseev, T. Matsuda et al.
Physics Letters B 713 ( 1 ) 10 - 16 2012.6
Language：English Publishing type：Research paper (scientific journal)
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Transverse spin effects in hadron-pair production from semi-inclusive deep inelastic scattering Reviewed
Adolph C., Alekseev M., Alexakhin V., Alexandrov Y., Alexeev G., Amoroso A., Antonov A., Austregesilo A., Badełek B., Balestra F., Barth J., Baum G., Bedfer Y., Bernhard J., Bertini R., Bettinelli M., Bicker K., Bieling J., Birsa R., Bisplinghoff J., Bordalo P., Bradamante F., Braun C., Bravar A., Bressan A., Burtin E., Chaberny D., Chiosso M., Chung S., Cicuttin A., Crespo M., Dalla Torre S., Das S., Dasgupta S., Denisov O., Dhara L., Donskov S., Doshita N., Duic V., Dünnweber W., Dziewiecki M., Efremov A., Elia C., Eversheim P., Eyrich W., Faessler M., Ferrero A., Filin A., Finger M., Finger J., Fischer H., Franco C., du Fresne von Hohenesche N., Friedrich J., Garfagnini R., Gautheron F., Gavrichtchouk O., Gazda R., Gerassimov S., Geyer R., Giorgi M., Gnesi I., Gobbo B., Goertz S., Grabmüller S., Grasso A., Grube B., Gushterski R., Guskov A., Guthörl T., Haas F., von Harrach D., Heinsius F., Herrmann F., Heß C., Hinterberger F., Horikawa N., Höppner C., d'Hose N., Huber S., Ishimoto S., Ivanov O., Ivanshin Y., Iwata T., Jahn R., Jasinski P., Joosten R., Kabuß E., Kang D., Ketzer B., Khaustov G., Khokhlov Y., Kisselev Y., Klein F., Klimaszewski K., Koblitz S., Koivuniemi J., Kolosov V., Kondo K.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 713 ( 1 ) 10 - 16 2012.6
Language：English Publishing type：Research paper (scientific journal) Publisher：Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
First measurements of azimuthal asymmetries in hadron-pair production in deep-inelastic scattering of muons on transversely polarised 6 LiD (deuteron) and NH 3 (proton) targets are presented. The data were taken in the years 2002-2004 and 2007 with the COMPASS spectrometer using a muon beam of 160 GeV/c at the CERN SPS. The asymmetries provide access to the transversity distribution functions, without involving the Collins effect as in single hadron production. The sizeable asymmetries measured on the NH 3 target indicate non-vanishing u-quark transversity and two-hadron interference fragmentation functions. The small asymmetries measured on the 6 LiD target can be interpreted as indication for a cancellation of u- and d-quark transversities. © 2012 Elsevier B.V.
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First Measurement of Chiral Dynamics in π- γ -> π- π- π+ Reviewed
C. Adolph, M.G. Alekseev, T. Matsuda et al.
Physical Review Letters 108 ( 19 ) 192001 - 6 2012.5
Language：English Publishing type：Research paper (scientific journal)
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Observation of charged κ in J/ψ →K∗(892)∓KSπ±, K∗(892)∓→KSπ∓ at BESII Reviewed
M. Ablikim, J.Z. Bai, T. Matsuda et al.
Physics Letters B 698 ( 3 ) 183 - 190 2011.4
Language：English Publishing type：Research paper (scientific journal)
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Observation of charged κ in J/Ψ→K*(892)∓K<inf>S</inf>Π±, K*(892)∓→K<inf>S</inf>π∓ at BESII Reviewed
Ablikim M., Bai J., Bai Y., Ban Y., Cai X., Chen H., Chen H., Chen J., Chen J., Chen Y., Chu Y., Dai Y., Deng Z., Du S., Fang J., Fu C., Gao Y., Gu Y., Guo Z., Harris F., He K., He M., Heng Y., Hu H., Hu T., Huang G., Huang X., Ishida M., Ishida S., Huang Y., Ji X., Jiang X., Jiao J., Jin D., Jin S., Komada T., Kurokawa S., Li G., Li H., Li J., Li L., Li R., Li W., Li W., Li X., Li X., Li X., Liang Y., Liu B., Liu C., Liu F., Liu F., Liu H., Liu J., Liu H., Liu Q., Liu R., Liu Z., Lu F., Lu G., Lu J., Luo C., Ma F., Ma H., Ma Q., Maeda T., Mao Z., Matsuda T., Mo X., Nie J., Oda M., Olsen S., Ping R., Qiu J., Rong G., Ruan X., Shan L., Shang L., Shen C., Shen X., Sheng H., Sun H., Sun S., Sun Y., Sun Z., Takamatsu K., Tang X., Tian J., Toi Y., Tsuru T., Ukai K., Varner G., Wan X., Wang L., Wang L., Wang L., Wang P., Wang P., Wang Y., Wang Z.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 698 ( 3 ) 183 - 190 2011.4
Language：English Publishing type：Research paper (scientific journal) Publisher：Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Using 58 million J/Ψ decays obtained by BESII, a charged κ particle is observed in the analysis of the K S π± system recoiling against Kz.ast;(892)∓ selected in J/ψ→K S K S π+π- The mass and width values of the charged κ are obtained to be (826±49-34+49) MeV/c2 and (449±156-81+144) MeV/c2 for the Breit-Wigner parameters, and the pole position is determined to be (764±63-54+71)-i(306±149-85+143) MeV/c2. They are in good agreement with those of the neutral κ observed by the BES Collaboration. © 2011 Elsevier B.V.
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Azimuthal asymmetries of charged hadrons produced by high-energy muons scattered off longitudinally polarised deuterons Reviewed
M.G. Alekseev, V.Yu. Alexakhin, T. Matsuda et al.
The European Physical Journal C 70 ( 1-2 ) 39 - 49 2010.11
Language：English Publishing type：Research paper (scientific journal)
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Alekseev M., Alexakhin V., Alexandrov Y., Alexeev G., Amoroso A., Austregesilo A., Badełek B., Balestra F., Barth J., Baum G., Bedfer Y., Bernhard J., Bertini R., Bettinelli M., Birsa R., Bisplinghoff J., Bordalo P., Bradamante F., Bravar A., Bressan A., Brona G., Burtin E., Bussa M., Chaberny D., Chiosso M., Chung S., Cicuttin A., Colantoni M., Crespo M., Dalla Torre S., Das S., Dasgupta S., Denisov O., Dhara L., Diaz V., Donskov S., Doshita N., Duic V., Dünnweber W., Efremov A., El Alaoui A., Eversheim P., Eyrich W., Faessler M., Ferrero A., Filin A., Finger M., Finger M., Fischer H., Franco C., Friedrich J., Garfagnini R., Gautheron F., Gavrichtchouk O., Gazda R., Gerassimov S., Geyer R., Giorgi M., Gnesi I., Gobbo B., Goertz S., Grabmüller S., Grasso A., Grube B., Gushterski R., Guskov A., Haas F., von Harrach D., Hasegawa T., Heinsius F., Herrmann F., Heß C., Hinterberger F., Horikawa N., Höppner C., d'Hose N., Ilgner C., Ishimoto S., Ivanov O., Ivanshin Y., Iwata T., Jahn R., Jasinski P., Jegou G., Joosten R., Kabuß E., Kang D., Ketzer B., Khaustov G., Khokhlov Y., Kisselev Y., Klein F., Klimaszewski K.
European Physical Journal C 70 ( 1 ) 39 - 49 2010.11
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：European Physical Journal C
Azimuthal asymmetries in semi-inclusive production of positive (h + ) and negative hadrons (h - ) have been measured by scattering 160 GeV muons off longitudinally polarised deuterons at CERN. The asymmetries were decomposed in several terms according to their expected modulation in the azimuthal angle φ of the outgoing hadron. Each term receives contributions from one or several spin and transverse-momentum-dependent parton distribution and fragmentation functions. The amplitudes of all φ-modulation terms of the hadron asymmetries integrated over the kinematic variables are found to be consistent with zero within statistical errors, while the constant terms are nonzero and equal for h + and h - within the statistical errors. The dependencies of the φ-modulated terms versus the Bjorken momentum fraction x, the hadron fractional momentum z, and the hadron transverse momentum P T h were studied. The x dependence of the constant terms for both positive and negative hadrons is in agreement with the longitudinal double-spin hadron asymmetries, measured in semi-inclusive deep-inelastic scattering. The x dependence of the sin φ-modulation term is less pronounced than that in the corresponding HERMES data. All other dependencies of the φ-modulation amplitudes are consistent with zero within the statistical errors. © 2010 The Author(s).
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Quark helicity distributions from longitudinal spin asymmetries in muon–proton and muon–deuteron scattering Reviewed
M.G. Alekseev, V.Yu. Alexakhin, T. Matsuda et al.
Physics Letters B 693 ( 3 ) 227 - 235 2010.10
Language：English Publishing type：Research paper (scientific journal)
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Alekseev M., Alexakhin V., Alexandrov Y., Alexeev G., Amoroso A., Austregesilo A., Balestra F., Barth J., Baum G., Bedfer Y., Bernhard J., Bertini R., Bettinelli M., Birsa R., Bisplinghoff J., Bordalo P., Bradamante F., Bravar A., Bressan A., Brona G., Burtin E., Bussa M., Chaberny D., Chiosso M., Chung S., Cicuttin A., Colantoni M., Crespo M., Torre S., Das S., Dasgupta S., Denisov O., Dhara L., Diaz V., Donskov S., Doshita N., Duic V., Dünnweber W., Efremov A., El Alaoui A., Eversheim P., Eyrich W., Faessler M., Ferrero A., Filin A., Finger M., Finger M., Fischer H., Franco C., Friedrich J., Garfagnini R., Gautheron F., Gavrichtchouk O., Gazda R., Gerassimov S., Geyer R., Giorgi M., Gnesi I., Gobbo B., Goertz S., Grabmüller S., Grasso A., Grube B., Gushterski R., Guskov A., Haas F., von Harrach D., Hasegawa T., Heinsius F., Herrmann F., Heß C., Hinterberger F., Horikawa N., Höppner C., d'Hose N., Ilgner C., Ishimoto S., Ivanov O., Ivanshin Y., Iwata T., Jahn R., Jasinski P., Jegou G., Joosten R., Kabuß E., Kang D., Ketzer B., Khaustov G.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 693 ( 3 ) 227 - 235 2010.10
Language：English Publishing type：Research paper (scientific journal) Publisher：Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Double-spin asymmetries for production of charged pions and kaons in semi-inclusive deep-inelastic muon scattering have been measured by the COMPASS experiment at CERN. The data, obtained by scattering a 160 GeV muon beam off a longitudinally polarised NH 3 target, cover a range of the Bjorken variable x between 0.004 and 0.7. A leading order evaluation of the helicity distributions for the three lightest quarks and antiquark flavours derived from these asymmetries and from our previous deuteron data is presented. The resulting values of the sea quark distributions are small and do not show any sizable dependence on x in the range of the measurements. No significant difference is observed between the strange and antistrange helicity distributions, both compatible with zero. The integrated value of the flavour asymmetry of the helicity distribution of the light-quark sea, Δū-sΔd̄, is found to be slightly positive, about 1.5 standard deviations away from zero. © 2010 Elsevier B.V.
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ガラス線量計及びESR ドシメトリーを用いるγ線照射装置の
中島暉,長田栄二,松田恵美子,松田達郎
宮崎大学工学部紀要 39 35 - 41 2010.9
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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Measurement of the Collins and Sivers asymmetries on transversely polarised protons Reviewed
M.G. Alekseev, V.Yu. Alexakhin, T. Matsuda et al.
Physics Letters B 692 ( 4 ) 240 - 246 2010.9
Language：English Publishing type：Research paper (scientific journal)
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Measurement of the Collins and Sivers asymmetries on transversely polarised protons Reviewed
Alekseev M., Alexakhin V., Alexandrov Y., Alexeev G., Amoroso A., Austregesilo A., Badełek B., Balestra F., Ball J., Barth J., Baum G., Bedfer Y., Bernhard J., Bertini R., Bettinelli M., Birsa R., Bisplinghoff J., Bordalo P., Bradamante F., Bravar A., Bressan A., Brona G., Burtin E., Bussa M., Chaberny D., Chiosso M., Chung S., Cicuttin A., Colantoni M., Crespo M., Torre S., Das S., Dasgupta S., Denisov O., Dhara L., Diaz V., Donskov S., Doshita N., Duic V., Dünnweber W., Efremov A., El Alaoui A., Elia C., Eversheim P., Eyrich W., Faessler M., Ferrero A., Filin A., Finger M., Finger M., Fischer H., Franco C., Friedrich J., Garfagnini R., Gautheron F., Gavrichtchouk O., Gazda R., Gerassimov S., Geyer R., Giorgi M., Gnesi I., Gobbo B., Goertz S., Grabmüller S., Grasso A., Grube B., Gushterski R., Guskov A., Haas F., von Harrach D., Hasegawa T., Heinsius F., Hermann R., Herrmann F., Heß C., Hinterberger F., Horikawa N., Höppner C., d'Hose N., Ilgner C., Ishimoto S., Ivanov O., Ivanshin Y., Iwata T., Jahn R., Jasinski P., Jegou G., Joosten R., Kabuß E., Käfer W., Kang D., Ketzer B., Khaustov G.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 692 ( 4 ) 240 - 246 2010.9
Language：English Publishing type：Research paper (scientific journal) Publisher：Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
The Collins and Sivers asymmetries for charged hadrons produced in deeply inelastic scattering on transversely polarised protons have been extracted from the data collected in 2007 with the CERN SPS muon beam tuned at 160 GeV/. c. At large values of the Bjorken x variable non-zero Collins asymmetries are observed both for positive and negative hadrons while the Sivers asymmetry for positive hadrons is slightly positive over almost all the measured x range. These results strongly support the present theoretical interpretation of these asymmetries, in terms of leading-twist quark distribution and fragmentation functions. © 2010 Elsevier B.V.
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Measurement of spin-density matrix elements for φ-meson photoproduction from protons and deuterons near threshold Reviewed
W.C. Chang, D.S. Ahn, T. Matsuda et al.
Physical Review C 82 ( 1 ) 015205-1 - 015205-11 2010.7
Language：English Publishing type：Research paper (scientific journal)
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Chang W., Ahn D., Ahn J., Akimune H., Asano Y., Daté S., Ejiri H., Fujimura H., Fujiwara M., Fukui S., Hasegawa S., Hicks K., Horie K., Hotta T., Imai K., Ishikawa T., Iwata T., Kato Y., Kawai H., Kino K., Kohri H., Kumagai N., Lin P., Makino S., Matsuda T., Matsumura T., Matsuoka N., Mibe T., Miyabe M., Miyachi Y., Muramatsu N., Nakano T., Niiyama M., Nomachi M., Ohashi Y., Ohkuma H., Ooba T., Oshuev D., Rangacharyulu C., Sakaguchi A., Shagin P., Shiino Y., Shimizu H., Sugaya Y., Sumihama M., Toi Y., Toyokawa H., Uchida M., Wakai A., Wang C., Wang S., Yonehara K., Yorita T., Yoshimura M., Yosoi M., Zegers R.
Physical Review C - Nuclear Physics 82 ( 1 ) 2010.7
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review C - Nuclear Physics
The LEPS/SPring-8 experiment made a comprehensive measurement of the spin-density matrix elements for γp→p, γd→pn, and γd→d at forward production angles. A linearly polarized photon beam at Eγ=1.6-2.4 GeV was used for the production of mesons. The natural-parity Pomeron exchange processes remain dominant near threshold. The unnatural-parity processes of pseudoscalar exchange is visible in the production from the nucleons but is greatly reduced in the coherent production from deuterons. There is no strong Eγ dependence, but there is some dependence on momentum transfer. A small but finite value of the spin-density matrix elements reflecting helicity-nonconserving amplitudes in the t-channel is observed. © 2010 The American Physical Society.
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Alekseev M., Alexakhin V., Alexandrov Y., Alexeev G., Amoroso A., Austregesilo A., Badełek B., Balestra F., Ball J., Barth J., Baum G., Bedfer Y., Bernhard J., Bertini R., Bettinelli M., Birsa R., Bisplinghoff J., Bordalo P., Bradamante F., Bravar A., Bressan A., Brona G., Burtin E., Bussa M., Chaberny D., Čotić D., Chiosso M., Chung S., Cicuttin A., Colantoni M., Crespo M., Torre S., Das S., Dasgupta S., Denisov O., Dhara L., Diaz V., Donskov S., Doshita N., Duic V., Dünnweber W., Efremov A., El Alaoui A., Eversheim P., Eyrich W., Faessler M., Ferrero A., Filin A., Finger M., Finger M., Fischer H., Franco C., Friedrich J., Garfagnini R., Gautheron F., Gavrichtchouk O., Gazda R., Gerassimov S., Geyer R., Giorgi M., Gnesi I., Gobbo B., Goertz S., Grabmüller S., Grasso A., Grube B., Gushterski R., Guskov A., Haas F., von Harrach D., Hasegawa T., Heinsius F., Hermann R., Herrmann F., Heß C., Hinterberger F., Horikawa N., Höppner C., d'Hose N., Ilgner C., Ishimoto S., Ivanov O., Ivanshin Y., Iwata T., Jahn R., Jasinski P., Jegou G., Joosten R., Kabuß E.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 690 ( 5 ) 466 - 472 2010.7
Language：English Publishing type：Research paper (scientific journal) Publisher：Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
The inclusive double-spin asymmetry, A 1 p , has been measured at COMPASS in deep-inelastic polarised muon scattering off a large polarised NH 3 target. The data, collected in the year 2007, cover the range Q 2 > 1 (GeV / c) 2 , 0.004 < x < 0.7 and improve the statistical precision of g 1 p (x) by a factor of two in the region x < 0.02. The new proton asymmetries are combined with those previously published for the deuteron to extract the non-singlet spin-dependent structure function g 1 NS (x, Q 2 ). The isovector quark density, Δ q 3 (x, Q 2 ), is evaluated from a NLO QCD fit of g 1 NS . The first moment of Δ q 3 is in good agreement with the value predicted by the Bjorken sum rule and corresponds to a ratio of the axial and vector coupling constants | g A / g V | = 1.28 ± 0.07 (stat .) ± 0.10 (syst.). © 2010 Elsevier B.V. All rights reserved.
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中性子放射化分析によるヒ素の定量の半減期依存性(平成21年度卒業論文抄録)
宮原 一平, 松田 達郎, 前田 幸重
放射化分析 ( 26 ) 2010.7
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：放射化分析研究会
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Observation of a JPC=1-+ Exotic Resonance in Diffractive Dissociation of 190 GeV/c π- into π-π-π+ Reviewed
M.G. Alekseev et al.
Physical Review Letters 104 ( 24 ) 241803 - 7 2010.6
Language：English Publishing type：Research paper (scientific journal)
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Alekseev M., Alexakhin V., Alexandrov Y., Alexeev G., Amoroso A., Austregesilo A., Badełek B., Balestra F., Ball J., Barth J., Baum G., Bedfer Y., Bernhard J., Bertini R., Bettinelli M., Birsa R., Bisplinghoff J., Bordalo P., Bradamante F., Bravar A., Bressan A., Brona G., Burtin E., Bussa M., Chapiro A., Chiosso M., Chung S., Cicuttin A., Colantoni M., Crespo M., Dalla Torre S., Dafni T., Das S., Dasgupta S., Denisov O., Dhara L., Diaz V., Dinkelbach A., Donskov S., Doshita N., Duic V., Dünnweber W., Efremov A., El Alaoui A., Eversheim P., Eyrich W., Faessler M., Ferrero A., Finger M., Finger M., Fischer H., Franco C., Friedrich J., Garfagnini R., Gautheron F., Gavrichtchouk O., Gazda R., Gerassimov S., Geyer R., Giorgi M., Gobbo B., Goertz S., Grabmüller S., Grajek O., Grasso A., Grube B., Gushterski R., Guskov A., Haas F., Von Harrach D., Hasegawa T., Heckmann J., Heinsius F., Hermann R., Herrmann F., Heß C., Hinterberger F., Horikawa N., Höppner C., D'Hose N., Ilgner C., Ishimoto S., Ivanov O., Ivanshin Y., Iwata T., Jahn R., Jasinski P., Jegou G., Joosten R., Kabuß E., Kang D.
Physical Review Letters 104 ( 24 ) 2010.6
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review Letters
The COMPASS experiment at the CERN SPS has studied the diffractive dissociation of negative pions into the π - π - π + final state using a 190GeV/c pion beam hitting a lead target. A partial wave analysis has been performed on a sample of 420000 events taken at values of the squared 4-momentum transfer t ′ between 0.1 and 1GeV2/c2. The well-known resonances a1(1260), a2(1320), and π2(1670) are clearly observed. In addition, the data show a significant natural-parity exchange production of a resonance with spin-exotic quantum numbers JPC=1 -+ at 1.66GeV/c2 decaying to ρπ. The resonant nature of this wave is evident from the mass-dependent phase differences to the JPC=2 -+ and 1 ++ waves. From a mass-dependent fit a resonance mass of (1660±10-64+0)MeV/c2 and a width of (269±21-64+42)MeV/c2 are deduced, with an intensity of (1.7±0.2)% of the total intensity. © 2010 The American Physical Society.
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The spin-dependent structure function of the proton g1p and a test of the Bjorken sum rule Reviewed
M.G. Alekseev et al.
Physics Letters B 690 ( 5 ) 466 - 472 2010.6
Language：English Publishing type：Research paper (scientific journal)
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Survey of Arsenic Contents in Soils of Ganges River Basin by Using Neutron Activation Analysis
T. Matsuda, K. Tanabe, A. Nakajima, Y. Maeda, I. Miyahara, Y. Ogawa, K. Ohe, E. Osada, M. Sezaki, K. Shiomori
Proceedings of 2nd International symposium on health hazard by arsenic contamination of groundwater and its countermeasures 143 - 144 2010.5
Language：English Publishing type：Research paper (international conference proceedings)
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Near-Threshold Λ(1520) Production by the γ↑p→K+Λ(1520) Reaction at Forward K+ Angles Reviewed
H. Kohri et al.
Physical Review Letters 104 ( 17 ) 172001 - 5 2010.4
Language：English Publishing type：Research paper (scientific journal)
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Kohri H., Ahn D., Ahn J., Akimune H., Asano Y., Chang W., Daté S., Ejiri H., Fukui S., Fujimura H., Fujiwara M., Hasegawa S., Hicks K., Hosaka A., Hotta T., Imai K., Ishikawa T., Iwata T., Kawai H., Kim Z., Kino K., Kumagai N., Makino S., Matsuda T., Matsumura T., Matsuoka N., Mibe T., Miyabe M., Miyachi Y., Morita M., Muramatsu N., Nakano T., Nam S., Niiyama M., Nomachi M., Ohashi Y., Ohkuma H., Ooba T., Oshuev D., Rangacharyulu C., Sakaguchi A., Sasaki T., Shagin P., Shiino Y., Shimizu A., Shimizu H., Sugaya Y., Sumihama M., Titov A., Toi Y., Toyokawa H., Wakai A., Wang C., Wang S., Yonehara K., Yorita T., Yoshimura M., Yosoi M., Zegers R.
Physical Review Letters 104 ( 17 ) 2010.4
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review Letters
Differential cross sections and photon-beam asymmetries for the γ→p→K + Λ(1520) reaction have been measured with linearly polarized photon beams at energies from the threshold to 2.4 GeV at 0.6 < cos θc.m.K < 1. A new bump structure was found at W 2.11GeV in the cross sections. The bump is not well reproduced by theoretical calculations introducing a nucleon resonance with J≤32. This result suggests that the bump might be produced by a nucleon resonance possibly with J 52 or by a new reaction process, for example, an interference effect with the φ photoproduction having a similar bump structure in the cross sections. © 2010 The American Physical Society.
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Measurement of the incoherent γd→φpn photoproduction near threshold Reviewed
W.C. Chang et al.
Physics Letters B 684 ( 1 ) 6 - 10 2010.2
Language：English Publishing type：Research paper (scientific journal)
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Measurement of the incoherent γ d → φ{symbol} p n photoproduction near threshold Reviewed
Chang W., Miyabe M., Nakano T., Ahn D., Ahn J., Akimune H., Asano Y., Daté S., Ejiri H., Fujimura H., Fujiwara M., Fukui S., Hasegawa S., Hicks K., Horie K., Hotta T., Imai K., Ishikawa T., Iwata T., Kato Y., Kawai H., Kino K., Kohri H., Kumagai N., Makino S., Matsuda T., Matsumura T., Matsuoka N., Mibe T., Miyachi M., Muramatsu N., Niiyama M., Nomachi M., Ohashi Y., Ohkuma H., Ooba T., Oshuev D., Rangacharyulu C., Sakaguchi A., Shagin P., Shiino Y., Shimizu H., Sugaya Y., Sumihama M., Toi Y., Toyokawa H., Uchida M., Wakai A., Wang C., Wang S., Yonehara K., Yorita T., Yoshimura M., Yosoi M., Zegers R.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 684 ( 1 ) 6 - 10 2010.2
Language：English Publishing type：Research paper (scientific journal) Publisher：Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
We report measurements of differential cross sections and decay asymmetries of incoherent φ{symbol}-meson photoproduction from the deuteron at forward angles using linearly polarized photons at E γ = 1.5 - 2.4 GeV. The nuclear transparency ratio for the deuteron shows a large suppression, and is consistent with the A-dependence of the ratio observed in a previous measurement with nuclear targets. The reduction for the deuteron cannot be adequately explained in term of isospin asymmetry. The present results suggest the need of refining our understanding of the φ{symbol}-N interaction within a nucleus. © 2010 Elsevier B.V. All rights reserved.
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Backward-angle η photoproduction from protons at Eγ=1.6-2.4 GeV Reviewed
M. Sumihama et al.
Physical Review C 80 ( 5 ) 052201 - 4 2009.11
Language：English Publishing type：Research paper (scientific journal)
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Backward-angle η photoproduction from protons at Eγ=1.6-2.4
Sumihama M., Ahn D., Ahn J., Akimune H., Asano Y., Chang W., Daté S., Ejiri H., Fujimura H., Fujiwara M., Fukui S., Hasegawa S., Hicks K., Hotta T., Imai K., Ishikawa T., Iwata T., Kato Y., Kawai H., Kino K., Kohri H., Kumagai N., Matsuda T., Matsumura T., Mibe T., Miyabe M., Muramatsu N., Nakano T., Niiyama M., Nomachi M., Ohashi Y., Ohkuma H., Ooba T., Oshuev D., Rangacharyulu C., Sakaguchi A., Shagin P., Shiino Y., Shimizu A., Shimizu H., Sugaya Y., Toi Y., Toyokawa H., Wakai A., Wang C., Wang S., Yonehara K., Yorita T., Yoshimura M., Yosoi M., Zegers R.
Physical Review C - Nuclear Physics 80 ( 5 ) 2009.11
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Physical Review C - Nuclear Physics
Differential cross sections for η photoproduction from protons have been measured at Eγ=1.6-2.4 GeV in the backward direction. A bump structure has been observed above 2.0 GeV in the total energy. No such bump is observed in η',ω, and π0 photoproductions. It is inferred that this unique structure in η photoproduction is due to a baryon resonance with a large ss̄ component that is strongly coupled to the ηN channel. © 2009 The American Physical Society.
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Measurement of the longitudinal spin transfer to Λ and Λ-bar hyperons in polarised muon DIS Reviewed
M. Alekseev et al.
European Physical Journal C 64 ( 2 ) 171 - 179 2009.11
Language：English Publishing type：Research paper (scientific journal)
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Measurement of the longitudinal spin transfer to Λ and barΛ hyperons in polarised muon DIS Reviewed
Alekseev M., Alexakhin V., Alexandrov Y., Alexeev G., Amoroso A., Austregesilo A., Badełek B., Balestra F., Ball J., Barth J., Baum G., Bedfer Y., Bernhard J., Bertini R., Bettinelli M., Birsa R., Bisplinghoff J., Bordalo P., Bradamante F., Bravar A., Bressan A., Brona G., Burtin E., Bussa M., Chapiro A., Chiosso M., Chung S., Cicuttin A., Colantoni M., Crespo M., Dalla Torre S., Dafni T., Das S., Dasgupta S., Denisov O., Dhara L., Diaz V., Dinkelbach A., Donskov S., Doshita N., Duic V., Dünnweber W., Efremov A., Eversheim P., Eyrich W., Faessler M., Ferrero A., Finger M., Finger M., Fischer H., Franco C., Friedrich J., Garfagnini R., Gautheron F., Gavrichtchouk O., Gazda R., Gerassimov S., Geyer R., Giorgi M., Gobbo B., Goertz S., Grabmüller S., Grajek O., Grasso A., Grube B., Gushterski R., Guskov A., Haas F., Von Harrach D., Hasegawa T., Heckmann J., Heinsius F., Hermann M., Hermann R., Herrmann F., He C., Hinterberger F., Horikawa N., Höppner C., D'Hose N., Ilgner C., Ishimoto S., Ivanov O., Ivanshin Y., Iven B., Iwata T., Jahn R., Jasinski P., Jegou G.
European Physical Journal C 64 ( 2 ) 171 - 179 2009.11
Language：English Publishing type：Research paper (scientific journal) Publisher：European Physical Journal C
The longitudinal polarisation transfer from muons to Λ and \bar\Λ hyperons, D LL Λ(barΛ),has been studied in deep-inelastic scattering off an unpolarised isoscalar target at the COMPASS experiment at CERN. The spin transfers to Λ and barΛ produced in the current fragmentation region exhibit different behaviours as a function of x and x F . The measured x and x F dependences of D LL Λ are compatible with zero, while D LL barΛ tends to increase with x F , reaching values of 0.4-0.5. The resulting average values are D LL Λ = -0.012±0.047±0.024 and D LL barΛ = 0.249±0.056±0.049. These results are discussed in the frame of recent model calculations. © 2009 Springer-Verlag / Società Italiana di Fisica.
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Flavour Separation of Helicity Distributions from Deep Inelastic Muon-Deuteron Scattering Reviewed
M. Alekseev et al.
Physics Letters B 680 ( 3 ) 217 - 224 2009.9
Language：English Publishing type：Research paper (scientific journal)
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Flavour separation of helicity distributions from deep inelastic muon-deuteron scattering
Alekseev M., Alexakhin V., Alexandrov Y., Alexeev G., Amoroso A., Austregesilo A., Badełek B., Balestra F., Ball J., Barth J., Baum G., Bedfer Y., Bernhard J., Bertini R., Bettinelli M., Birsa R., Bisplinghoff J., Bordalo P., Bradamante F., Bravar A., Bressan A., Brona G., Burtin E., Bussa M., Chapiro A., Chiosso M., Chung S., Cicuttin A., Colantoni M., Crespo M., Torre S., Dafni T., Das S., Dasgupta S., Denisov O., Dhara L., Diaz V., Dinkelbach A., Donskov S., Doshita N., Duic V., Dünnweber W., Efremov A., El Alaoui A., Eversheim P., Eyrich W., Faessler M., Ferrero A., Finger M., Finger M., Fischer H., Franco C., Friedrich J., Garfagnini R., Gautheron F., Gavrichtchouk O., Gazda R., Gerassimov S., Geyer R., Giorgi M., Gobbo B., Goertz S., Grabmüller S., Grajek O., Grasso A., Grube B., Gushterski R., Guskov A., Haas F., Hagemann R., von Harrach D., Hasegawa T., Heckmann J., Heinsius F., Hermann R., Herrmann F., Heß C., Hinterberger F., Horikawa N., Höppner C., d'Hose N., Ilgner C., Ishimoto S., Ivanov O., Ivanshin Y., Iwata T., Jahn R., Jasinski P., Jegou G., Joosten R., Kabuß E.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 680 ( 3 ) 217 - 224 2009.9
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
We present a LO evaluation of helicity densities of valence, Δ u v + Δ d v , non-strange sea, Δ over(u, ̄) + Δ over(d, ̄), and strange quarks, Δs (assumed to be equal to Δ over(s, ̄)). They have been obtained from the inclusive asymmetry A 1, d and the semi-inclusive asymmetries A 1, d π + , A 1, d π - , A 1, d K + , A 1, d K - measured in polarised deep inelastic muon-deuteron scattering. The full deuteron statistics of COMPASS (years 2002-2004 and 2006) has been used. The data cover the range Q 2 > 1 (GeV / c) 2 and 0.004 < x < 0.3. Both non-strange densities are found to be in a good agreement with previous measurements. The distribution of Δ s (x) is compatible with zero in the whole measured range, in contrast to the shape of the strange quark helicity distribution obtained in most LO and NLO QCD fits. The sensitivity of the values of Δ s (x) upon the choice of fragmentation functions used in the derivation is discussed. © 2009 Elsevier B.V. All rights reserved.
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Near-threshold photoproduction of Λ(1520) from protons and deuterons Reviewed
Muramatsu N., Chen J., Chang W., Ahn D., Ahn J., Akimune H., Asano Y., Daté S., Ejiri H., Fujimura H., Fujiwara M., Fukui S., Hasegawa S., Hicks K., Horie K., Hotta T., Imai K., Ishikawa T., Iwata T., Kato Y., Kawai H., Kino K., Kohri H., Kumagai N., Makino S., Matsuda T., Matsumura T., Matsuoka N., Mibe T., Miyabe M., Miyachi M., Nakano T., Niiyama M., Nomachi M., Ohashi Y., Ohkuma H., Ooba T., Oshuev D., Rangacharyulu C., Sakaguchi A., Shagin P., Shiino Y., Shimizu H., Sugaya Y., Sumihama M., Toi Y., Toyokawa H., Wakai A., Wang C., Wang S., Yonehara K., Yorita T., Yoshimura M., Yosoi M., Zegers R.
Physical Review Letters 103 ( 1 ) 2009.8
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review Letters
Photoproduction of Λ(1520) with liquid hydrogen and deuterium targets was examined at photon energies below 2.4GeV in the SPring-8 LEPS experiment. For the first time, the differential cross sections were measured at low energies and with a deuterium target. A large asymmetry of the production cross sections from protons and neutrons was observed at backward K+/0 angles. This suggests the importance of the contact term, which coexists with t-channel K exchange under gauge invariance. This interpretation was compatible with the differential cross sections, decay asymmetry, and photon beam asymmetry measured in the production from protons at forward K+ angles. © 2009 The American Physical Society.
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Alekseev M., Alexakhin V., Alexandrov Y., Alexeev G., Amoroso A., Austregisilio A., Badełek B., Balestra F., Ball J., Barth J., Baum G., Bedfer Y., Bernhard J., Bertini R., Bettinelli M., Birsa R., Bisplinghoff J., Bordalo P., Bradamante F., Bravar A., Bressan A., Brona G., Burtin E., Bussa M., Chapiro A., Chiosso M., Chung S., Cicuttin A., Colantoni M., Crespo M., Torre S., Dafni T., Das S., Dasgupta S., Denisov O., Dhara L., Diaz V., Dinkelbach A., Donskov S., Doshita N., Duic V., Dünnweber W., Efremov A., El Alaoui A., Eversheim P., Eyrich W., Faessler M., Ferrero A., Finger M., Finger M., Fischer H., Franco C., Friedrich J., Garfagnini R., Gautheron F., Gavrichtchouk O., Gazda R., Gerassimov S., Geyer R., Giorgi M., Gobbo B., Goertz S., Grabmüller S., Grajek O., Grasso A., Grube B., Gushterski R., Guskov A., Haas F., Hagemann R., von Harrach D., Hasegawa T., Heckmann J., Heinsius F., Hermann R., Herrmann F., Heß C., Hinterberger F., von Hodenberg M., Horikawa N., Höppner C., d'Hose N., Ilgner C., Ishimoto S., Ivanov O., Ivanshin Y., Iwata T., Jahn R., Jasinski P., Jegou G., Joosten R.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 676 ( 1-3 ) 31 - 38 2009.6
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
The gluon polarisation in the nucleon has been determined by detecting charm production via D 0 meson decay to charged K and π in polarised muon scattering off a longitudinally polarised deuteron target. The data were taken by the COMPASS Collaboration at CERN between 2002 and 2006 and correspond to an integrated luminosity of 2.8 fb -1 . The dominant underlying process of charm production is the photon-gluon fusion to a c over(c, ̄) pair. A leading order QCD approach gives an average gluon polarisation of 〈 Δ g / g 〉 x = - 0.49 ± 0.27 (stat) ± 0.11 (syst) at a scale μ 2 ≈ 13 (GeV / c) 2 and at an average gluon momentum fraction 〈 x 〉 ≈ 0.11. The longitudinal cross-section asymmetry for D 0 production is presented in bins of the transverse momentum and the energy of the D 0 meson. © 2009 Elsevier B.V. All rights reserved.
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Gluon polarisation in the nucleon and longitudinal double spin asymmetries from open charm muoproduction Reviewed
M. Alekseev et al.
Physics Letters B 676 ( 1-3 ) 31 - 38 2009.6
Language：English Publishing type：Research paper (scientific journal)
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Collins and Sivers asymmetries for pions and kaons in muon-deuteron DIS
Alekseev M., Alexakhin V., Alexandrov Y., Alexeev G., Amoroso A., Arbuzov A., Badełek B., Balestra F., Ball J., Barth J., Baum G., Bedfer Y., Bernet C., Bertini R., Bettinelli M., Birsa R., Bisplinghoff J., Bordalo P., Bradamante F., Bravar A., Bressan A., Brona G., Burtin E., Bussa M., Chapiro A., Chiosso M., Cicuttin A., Colantoni M., Costa S., Crespo M., Dalla Torre S., Dafni T., Das S., Dasgupta S., De Masi R., Dedek N., Denisov O., Dhara L., Diaz V., Dinkelbach A., Donskov S., Dorofeev V., Doshita N., Duic V., Dünnweber W., Efremov A., Eversheim P., Eyrich W., Faessler M., Falaleev V., Ferrero A., Ferrero L., Finger M., Finger M., Fischer H., Franco C., Franz J., Friedrich J., Frolov V., Garfagnini R., Gautheron F., Gavrichtchouk O., Gazda R., Gerassimov S., Geyer R., Giorgi M., Gobbo B., Goertz S., Gorin A., Grabmüller S., Grajek O., Grasso A., Grube B., Gushterski R., Guskov A., Haas F., Hannappel J., von Harrach D., Hasegawa T., Heckmann J., Hedicke S., Heinsius F., Hermann R., Heß C., Hinterberger F., von Hodenberg M., Horikawa N., Horikawa S., d'Hose N., Ilgner C., Ioukaev A., Ishimoto S., Ivanov O., Ivanshin Y., Iwata T.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 673 ( 2 ) 127 - 135 2009.3
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
The measurements of the Collins and Sivers asymmetries of identified hadrons produced in deep-inelastic scattering of 160 GeV/c muons on a transversely polarised 6 LiD target at COMPASS are presented. The results for charged pions and charged and neutral kaons correspond to all data available, which were collected from 2002 to 2004. For all final state particles both, the Collins and Sivers asymmetries turn out to be small, compatible with zero within the statistical errors, in line with the previously published results for not identified charged hadrons, and with the expected cancellation between the u- and d-quark contributions. © 2009 Elsevier B.V. All rights reserved.
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Collins and Sivers asymmetries for pions and kaons in muon-deuteron DIS Reviewed
M. Alekseev et al.
Physics Letters 673 ( 2 ) 127 - 135 2009.3
Language：English Publishing type：Research paper (scientific journal)
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Evidence for the Θ+ in the γd→K+K-pn reaction by detecting K+K- pairs
Nakano T., Muramatsu N., Ahn D., Ahn J., Akimune H., Asano Y., Chang W., Daté S., Ejiri H., Fujimura H., Fujiwara M., Fukui S., Hasegawa H., Hicks K., Horie K., Hotta T., Imai K., Ishikawa T., Iwata T., Kato Y., Kawai H., Kim Z., Kino K., Kohri H., Kumagai N., Makino S., Matsuda T., Matsuoka N., Matsumura T., Mibe T., Miyabe M., Miyachi Y., Niiyama M., Nomachi M., Ohashi Y., Ohkuma H., Ooba T., Oshuev D., Rangacharyulu C., Sakaguchi A., Shagin P., Shiino Y., Shimizu A., Shimizu H., Sugaya Y., Sumihama M., Toi Y., Toyokawa H., Wakai A., Wang C., Wang S., Yonehara K., Yorita T., Yoshimura M., Yosoi M., Zegers R.
Physical Review C - Nuclear Physics 79 ( 2 ) 2009.2
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Physical Review C - Nuclear Physics
The γd→K+K-pn reaction has been studied to search for the evidence of the Θ+ by detecting K+K- pairs at forward angles. The Fermi-motion-corrected nK+ invariant mass distribution shows a narrow peak at 1.524±0.002+0.003 GeV/c2. The statistical significance of the peak calculated from a shape analysis is 5.1 σ, and the differential cross section for the γn→K-Θ+ reaction is estimated to be 12±2 nb/sr in the photon energy range from 2.0 to 2.4 GeV in the LEPS angular range by assuming the isotropic production of the Θ+ in the γn center-of-mass system. The obtained results support the existence of the Θ+. © 2009 The American Physical Society.
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Evidence for the Θ+ in the γd → K+ K- pn reaction by detecting K+ K- pairs Reviewed
T. Nakano et al.
Physical Review C 79 ( 2 ) 025210 - +15 2009.2
Language：English Publishing type：Research paper (scientific journal)
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Cross sections and beam asymmetry for K+Σ*- photoproduction from the deuteron at Eγ=1.5-2.4GeV
Hicks K., Keller D., Kohri H., Ahn D., Ahn J., Akimune H., Asano Y., Chang W., Daté S., Ejiri H., Fukui S., Fujimura H., Fujiwara M., Hasegawa S., Hotta T., Imai K., Ishikawa T., Iwata T., Kato Y., Kawai H., Kim Z., Kino K., Kumagai N., Makino S., Matsuda T., Matsumura T., Matsuoka N., Mibe T., Miyabe M., Miyachi Y., Morita M., Muramatsu N., Nakano T., Niiyama M., Nomachi M., Oh Y., Ohashi Y., Ohkuma H., Ooba T., Parker J., Rangacharyulu C., Sakaguchi A., Sasaki T., Shagin P., Shiino Y., Shimizu A., Shimizu H., Sugaya Y., Sumihama M., Toi Y., Toyokawa H., Wakai A., Wang C., Wang S., Yonehara K., Yorita T., Yoshimura M., Yosoi M., Zegers R.
Physical Review Letters 102 ( 1 ) 2009.1
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Physical Review Letters
The Σ(1385) resonance, or Σ*, is well known as part of the standard baryon decuplet with spin J=32. Measurements of the reaction γp→K+Σ*0 are difficult to extract due to overlap with the nearby Λ(1405) resonance. However, the reaction γn→K+Σ *- has no overlap with the Λ(1405) due to its charge. Here we report the first measurement of cross sections and beam asymmetries for photoproduction of the Σ*- from a deuteron target. The cross sections at forward angles range from 0.4 to 1.2μb, with a broad maximum near Eγ 1.8GeV. The beam asymmetries are negative, in contrast with positive values for the γn→K+Σ- reaction. © 2009 The American Physical Society.
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Cross sections and beamasymmetries for K+ Σ*- photoproduction from the deuteronat Eγ = 1.5-2.4 GeV Reviewed
K. Hicks et al.
Physical Review Letters 102 ( 1 ) 012501 - +5 2009.1
Language：English Publishing type：Research paper (scientific journal)
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The COMPASS polarized target in 2006 and 2007 Reviewed
Doshita N., Ballt J., Baum G., Gautheron F., Goertz S., Hasegawa T., Heckmann J., Hess C., Horikawa N., Ishimoto S., Iwata T., Kisselev Y., Koivuniemi J., Kondo K., Magnon A., Marchand C., Matsuda T., Meyer W., Michigami T., Radtke E., Reicherz G.
AIP Conference Proceedings 980 307 - 311 2008.12
Language：English Publishing type：Research paper (scientific journal) Publisher：AIP Conference Proceedings
The COMPASS experiment has been taking data since 2002. Its polarized target was upgraded during the 2005 CERN SPS shutdown. With the high acceptance magnet we obtained +56.0 % and -53.0 % deuteron polarization in 6 LiD. In 2007 ammonia is used as a proton target which has a relaxation time of ∼4000 h at 0.6 T. © 2008 American Institute of Physics.
DOI： 10.1063/1.2888101
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The polarised valence quark distribution from semi-inclusive DIS Reviewed
Alekseev M., Alexakhin V., Alexandrov Y., Alexeev G., Amoroso A., Arbuzov A., Badełek B., Balestra F., Ball J., Barth J., Baum G., Bedfer Y., Bernet C., Bertini R., Bettinelli M., Birsa R., Bisplinghoff J., Bordalo P., Bradamante F., Bravar A., Bressan A., Brona G., Burtin E., Bussa M., Chapiro A., Chiosso M., Cicuttin A., Colantoni M., Costa S., Crespo M., Dalla Torre S., Dafni T., Das S., Dasgupta S., De Masi R., Dedek N., Denisov O., Dhara L., Diaz V., Dinkelbach A., Donskov S., Dorofeev V., Doshita N., Duic V., Dünnweber W., Eversheim P., Eyrich W., Faessler M., Falaleev V., Ferrero A., Ferrero L., Finger M., Finger M., Fischer H., Franco C., Franz J., Friedrich J., Frolov V., Garfagnini R., Gautheron F., Gavrichtchouk O., Gazda R., Gerassimov S., Geyer R., Giorgi M., Gobbo B., Goertz S., Gorin A., Grabmüller S., Grajek O., Grasso A., Grube B., Gushterski R., Guskov A., Haas F., Hannappel J., von Harrach D., Hasegawa T., Heckmann J., Hedicke S., Heinsius F., Hermann R., Heß C., Hinterberger F., von Hodenberg M., Horikawa N., Horikawa S., d'Hose N., Ilgner C., Ioukaev A., Ishimoto S., Ivanov O., Ivanshin Y., Iwata T.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 660 ( 5 ) 458 - 465 2008.3
Language：English Publishing type：Research paper (scientific journal) Publisher：Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
The semi-inclusive difference asymmetry A h+ - h- for hadrons of opposite charge has been measured by the COMPASS experiment at CERN. The data were collected in the years 2002-2004 using a 160 GeV polarised muon beam scattered off a large polarised 6 LiD target in the kinematic range 0.006 < x < 0.7 and 1 < Q 2 < 100 (GeV / c) 2 . In leading order QCD (LO) the deuteron asymmetry A h+ - h- measures the valence quark polarisation and provides an evaluation of the first moment of Δ u v + Δ d v which is found to be equal to 0.40 ± 0.07 (stat.) ± 0.06 (syst.) over the measured range of x at Q 2 = 10 (GeV / c) 2 . When combined with the first moment of g 1 d previously measured on the same data, this result favours a non-symmetric polarisation of light quarks Δ over(u, ̄) = - Δ over(d, ̄) at a confidence level of two standard deviations, in contrast to the often assumed symmetric scenario Δ over(u, ̄) = Δ over(d, ̄) = Δ over(s, ̄) = Δ s. © 2008 Elsevier B.V. All rights reserved.
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The polarized valence quark distribution from semi-inclusive DIS Reviewed
M. Alekseev, V.Yu. Alexakhin, T. Matsuda et al.
Physics Letters B 660 458 - 465 2008.3
Language：English Publishing type：Research paper (scientific journal)
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Forward coherent φ{symbol}-meson photoproduction from deuterons near threshold
Chang W., Horie K., Shimizu S., Miyabe M., Ahn D., Ahn J., Akimune H., Asano Y., Daté S., Ejiri H., Fukui S., Fujimura H., Fujiwara M., Hasegawa S., Hicks K., Hotta T., Imai K., Ishikawa T., Iwata T., Kato Y., Kawai H., Kim Z., Kino K., Kohri H., Kumagai N., Lin P., Makino S., Matsuda T., Matsumura T., Matsuoka N., Mibe T., Miyachi Y., Morita M., Muramatsu N., Nakano T., Niiyama M., Nomachi M., Ohashi Y., Ohkuma H., Ooba T., Oshuev D., Rangacharyulu C., Sakaguchi A., Sasaki T., Shagin P., Shiino Y., Shimizu A., Shimizu H., Sugaya Y., Sumihama M., Toi Y., Toyokawa H., Wakai A., Wang C., Wang S., Yonehara K., Yorita T., Yoshimura M., Yosoi M., Zegers R.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 658 ( 5 ) 209 - 215 2008.1
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Differential cross sections and decay asymmetries for coherent φ{symbol}-meson photoproduction from deuterons were measured for the first time at forward angles using linearly polarized photons at E γ = 1.5 - 2.4 GeV. This reaction offers a unique way to directly access natural-parity pomeron dynamics and gluon exchange at low energies. The cross sections at zero degrees increase with increasing photon energy. The decay asymmetries demonstrate a complete dominance of natural-parity exchange processes, showing that isovector unnatural-parity π-meson exchange is small. Nevertheless the deduced cross sections of φ{symbol}-mesons from nucleons contributed by isoscalar t-channel exchange processes are not well described by the conventional pomeron model. © 2007 Elsevier B.V. All rights reserved.
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Forward coherent φ-mesonphotoproduction from deuteronnear threshold Reviewed
W.C. Chang et al.
Physics Letters B 658 ( 5 ) 209 - 215 2008.1
Language：English Publishing type：Research paper (scientific journal)
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Measurement of the γ→p→K+Λ reaction at backward angles Reviewed
Hicks K., Mibe T., Sumihama M., Ahn D., Ahn J., Akimune H., Asano Y., Chang W., Daté S., Ejiri H., Fukui S., Fujimura H., Fujiwara M., Hasegawa S., Hosaka A., Hotta T., Imai K., Ishikawa T., Iwata T., Juliá-Díaz B., Kato Y., Kawai H., Kim Z., Kino K., Kohri H., Kumagai N., Lee T., Makino S., Matsuda T., Matsumura T., Matsuoka N., Miyabe M., Miyachi Y., Morita M., Muramatsu N., Nakano T., Niiyama M., Nomachi M., Ohashi Y., Ooba T., Ohkuma H., Oshuev D., Ozaki S., Rangacharyulu C., Sakaguchi A., Sasaki T., Shagin P., Shiino Y., Shimizu A., Shimizu H., Sugaya Y., Toi Y., Toyokawa H., Wakai A., Wang C., Wang S., Yonehara K., Yorita T., Yoshimura M., Yosoi M., Zegers R.
Physical Review C - Nuclear Physics 76 ( 4 ) 2007.10
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review C - Nuclear Physics
Cross sections for the γp→K+Λ reaction were measured at backward angles using linearly polarized photons in the range 1.50 to 2.37 GeV. In addition, the beam asymmetry for this reaction was measured for the first time at backward angles. The Λ was detected at forward angles in the LEPS spectrometer via its decay to pπ- and the K+ was inferred using the technique of missing mass. These measurements, corresponding to kaons at far backward angles in the center-of-mass frame, complement similar CLAS data at other angles. Comparison with theoretical models shows that the reactions in these kinematics provide further opportunities to investigate the reaction mechanisms of hadron dynamics. © 2007 The American Physical Society.
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Double spin asymmetry in exclusive ρ0 muoproduction at COMPASS Reviewed
P. Abbon, E. Albrecht, T. Matsuda et al.
European Physical Journal C 52 ( 2 ) 255 - 265 2007.10
Language：English Publishing type：Research paper (scientific journal)
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Measurement of the #Eγ(/)→#ERp→K+Λ reaction at backward angles Reviewed
W.C. Chang, K. Horie, T. Matsuda et al.
Physical Review C 76 ( 4 ) 042201 - 6 2007.10
Language：English Publishing type：Research paper (scientific journal)
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Double spin asymmetry in exclusive ρ<sup>0</sup> muoproduction at COMPASS
Alekseev M., Alexakhin V., Alexandrov Y., Alexeev G., Amoroso A., Arbuzov A., Badełek B., Balestra F., Ball J., Baum G., Barth J., Bedfer Y., Bernet C., Bertini R., Bettinelli M., Birsa R., Bisplinghoff J., Bordalo P., Bradamante F., Bravar A., Bressan A., Brona G., Burtin E., Bussa M., Chapiro A., Chiosso M., Cicuttin A., Colantoni M., Costa S., Crespo M., D'Hose N., Dalla Torre S., Das S., Dasgupta S., De Masi R., Dedek N., Denisov O., Dhara L., Diaz V., Dinkelbach A., Donskov S., Dorofeev V., Doshita N., Duic V., Dünnweber W., Eversheim P., Eyrich W., Fabro M., Faessler M., Falaleev V., Ferrero A., Ferrero L., Finger M., Finger M., Fischer H., Franco C., Franz J., Friedrich J., Frolov V., Garfagnini R., Gautheron F., Gavrichtchouk O., Gazda R., Gerassimov S., Geyer R., Giorgi M., Gobbo B., Goertz S., Gorin A., Grabmüller S., Grajek O., Grasso A., Grube B., Gushterski R., Guskov A., Haas F., Hannappel J., Von Harrach D., Hasegawa T., Heckmann J., Hedicke S., Heinsius F., Hermann R., Heß C., Hinterberger F., Von Hodenberg M., Horikawa N., Horikawa S., Ilgner C., Ioukaev A., Ishimoto S., Ivanov O., Ivanshin Y., Iwata T.
European Physical Journal C 52 ( 2 ) 255 - 265 2007.10
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：European Physical Journal C
The longitudinal double spin asymmetry A 1 ρ for exclusive leptoproduction of ρ 0 mesons, μ+N→μ+N+ρ, is studied using the COMPASS 2002 and 2003 data. The measured reaction is incoherent exclusive ρ 0 production on polarised deuterons. The Q 2 and x dependence of A 1 ρ is presented in a wide kinematical range, 3×10 -3 < Q 2 < 7 (GeV/c) 2 and 5×10 -5 < x < 0.05. The results presented are the first measurements of A 1 ρ at small Q 2 (Q 2 < 0.1 (GeV/c) 2 ) and small x (x < 3×10 -3 ). The asymmetry is in general compatible with zero in the whole kinematical range. © 2007 Springer-Verlag / Società Italiana di Fisica.
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The COMPASS experiment at CERN Reviewed
Abbon P., Albrecht E., Alexakhin V., Alexandrov Y., Alexeev G., Alekseev M., Amoroso A., Angerer H., Anosov V., Badełek B., Balestra F., Ball J., Barth J., Baum G., Becker M., Bedfer Y., Berglund P., Bernet C., Bertini R., Bettinelli M., Birsa R., Bisplinghoff J., Bordalo P., Bosteels M., Bradamante F., Braem A., Bravar A., Bressan A., Brona G., Burtin E., Bussa M., Bytchkov V., Chalifour M., Chapiro A., Chiosso M., Ciliberti P., Cicuttin A., Colantoni M., Colavita A., Costa S., Crespo M., Cristaudo P., Dafni T., d'Hose N., Dalla Torre S., d'Ambrosio C., Das S., Dasgupta S., Delagnes E., De Masi R., Deck P., Dedek N., Demchenko D., Denisov O., Dhara L., Diaz V., Dibiase N., Dinkelbach A., Dolgopolov A., Donati A., Donskov S., Dorofeev V., Doshita N., Durand D., Duic V., Dünnweber W., Efremov A., Eversheim P., Eyrich W., Faessler M., Falaleev V., Fauland P., Ferrero A., Ferrero L., Finger M., Finger M., Fischer H., Franco C., Franz J., Fratnik F., Friedrich J., Frolov V., Fuchs U., Garfagnini R., Gatignon L., Gautheron F., Gavrichtchouk O., Gerassimov S., Geyer R., Gheller J., Giganon A., Giorgi M., Gobbo B.
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 577 ( 3 ) 455 - 518 2007.7
Language：English Publishing type：Research paper (scientific journal) Publisher：Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
The COMPASS experiment makes use of the CERN SPS high-intensity muon and hadron beams for the investigation of the nucleon spin structure and the spectroscopy of hadrons. One or more outgoing particles are detected in coincidence with the incoming muon or hadron. A large polarised target inside a superconducting solenoid is used for the measurements with the muon beam. Outgoing particles are detected by a two-stage, large angle and large momentum range spectrometer. The setup is built using several types of tracking detectors, according to the expected incident rate, required space resolution and the solid angle to be covered. Particle identification is achieved using a RICH counter and both hadron and electromagnetic calorimeters. The setup has been successfully operated from 2002 onwards using a muon beam. Data with a hadron beam were also collected in 2004. This article describes the main features and performances of the spectrometer in 2004; a short summary of the 2006 upgrade is also given. © 2007 Elsevier B.V. All rights reserved.
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The COMPASS experiment at CERN Reviewed
P. Abbon, E. Albrecht, T. Matsuda et al.
Nuclear Instruments and Methods A 577 455 - 518 2007.7
Language：English Publishing type：Research paper (scientific journal)
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Alexakhin V., Alexandrov Y., Alexeev G., Amoroso A., Badełek B., Balestra F., Ball J., Baum G., Bedfer Y., Bernet C., Bertini R., Birsa R., Bisplinghoff J., Bordalo P., Bradamante F., Bravar A., Bressan A., Brona G., Burtin E., Bussa M., Chapiro A., Cicuttin A., Colantoni M., Costa S., Crespo M., d'Hose N., Dalla Torre S., Dasgupta S., De Masi R., Denisov O., Dhara L., Diaz Kavka V., Dinkelbach A., Donskov S., Dorofeev V., Doshita N., Duic V., Dünnweber W., Eversheim P., Eyrich W., Fabro M., Faessler M., Falaleev V., Ferrero A., Ferrero L., Finger M., Finger M., Fischer H., Franz J., Friedrich J., Frolov V., Garfagnini R., Gautheron F., Gavrichtchouk O., Gerassimov S., Geyer R., Giorgi M., Gobbo B., Goertz S., Gorin A., Grajek O., Grasso A., Grube B., Hannappel J., von Harrach D., Hasegawa T., Heckmann J., Hedicke S., Heinsius F., Hermann R., Heß C., Hinterberger F., von Hodenberg M., Horikawa N., Horikawa S., Ilgner C., Ioukaev A., Ishimoto S., Ivanov O., Iwata T., Jahn R., Janata A., Joosten R., Jouravlev N., Kabuß E., Kang D., Ketzer B., Khaustov G., Khokhlov Y., Khomutov N., Kisselev Y., Klein F., Koblitz S., Koivuniemi J., Kolosov V., Komissarov E., Kondo K.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 647 ( 5-6 ) 330 - 340 2007.4
Language：English Publishing type：Research paper (scientific journal) Publisher：Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
We present a precise measurement of the deuteron longitudinal spin asymmetry A 1 d and of the deuteron spin-dependent structure function g 1 d at Q 2 < 1 (GeV / c) 2 and 4 × 10 -5 < x < 2.5 × 10 -2 based on the data collected by the COMPASS experiment at CERN during the years 2002 and 2003. The statistical precision is tenfold better than that of the previous measurement in this region. The measured A 1 d and g 1 d are found to be consistent with zero in the whole range of x. © 2007 Elsevier B.V. All rights reserved.
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Spin asymmetry A1d and the spin-dependent structure function g1d of the deuteron at low values of x and Q2. Reviewed
Yu. Alexakhin, Yu. Alexandrov, T. Matsuda et al.
Physics Letters B 647 330 - 340 2007.4
Language：English Publishing type：Research paper (scientific journal)
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The deuteron spin-dependent structure function g<inf>1</inf><sup>d</sup> and its first moment Reviewed
Alexakhin V., Alexandrov Y., Alexeev G., Alexeev M., Amoroso A., Badełek B., Balestra F., Ball J., Barth J., Baum G., Becker M., Bedfer Y., Bernet C., Bertini R., Bettinelli M., Birsa R., Bisplinghoff J., Bordalo P., Bradamante F., Bressan A., Brona G., Burtin E., Bussa M., Bytchkov V., Chapiro A., Cicuttin A., Colantoni M., Colavita A., Costa S., Crespo M., d'Hose N., Dalla Torre S., Das S., Dasgupta S., De Masi R., Dedek N., Demchenko D., Denisov O., Dhara L., Diaz V., Dinkelbach A., Donskov S., Dorofeev V., Doshita N., Duic V., Dünnweber W., Efremov A., Eversheim P., Eyrich W., Faessler M., Fauland P., Ferrero A., Ferrero L., Finger M., Finger M., Fischer H., Franz J., Friedrich J., Frolov V., Garfagnini R., Gautheron F., Gavrichtchouk O., Gerassimov S., Geyer R., Giorgi M., Gobbo B., Goertz S., Gorin A., Grajek O., Grasso A., Grube B., Guskov A., Haas F., Hannappel J., von Harrach D., Hasegawa T., Hedicke S., Heinsius F., Hermann R., Heß C., Hinterberger F., von Hodenberg M., Horikawa N., Horikawa S., Horn I., Ilgner C., Ioukaev A., Ivanchin I., Ivanov O., Iwata T., Jahn R., Janata A., Joosten R., Jouravlev N.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 647 ( 1 ) 8 - 17 2007.3
Language：English Publishing type：Research paper (scientific journal) Publisher：Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
We present a measurement of the deuteron spin-dependent structure function g 1 d based on the data collected by the COMPASS experiment at CERN during the years 2002-2004. The data provide an accurate evaluation for Γ 1 d , the first moment of g 1 d (x), and for the matrix element of the singlet axial current, a 0 . The results of QCD fits in the next to leading order (NLO) on all g 1 deep inelastic scattering data are also presented. They provide two solutions with the gluon spin distribution function ΔG positive or negative, which describe the data equally well. In both cases, at Q 2 = 3 (GeV / c) 2 the first moment of Δ G (x) is found to be of the order of 0.2-0.3 in absolute value. © 2007 Elsevier B.V. All rights reserved.
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A new measurement of the Collins and Sivers asymmetries on a transversely polarised deuteron target
Ageev E., Alexakhin V., Alexandrov Y., Alexeev G., Alexeev M., Amoroso A., Badełek B., Balestra F., Ball J., Barth J., Baum G., Becker M., Bedfer Y., Berglund P., Bernet C., Bertini R., Bettinelli M., Birsa R., Bisplinghoff J., Bordalo P., Bradamante F., Bressan A., Brona G., Burtin E., Bussa M., Bytchkov V., Chapiro A., Cicuttin A., Colantoni M., Colavita A., Costa S., Crespo M., d'Hose N., Dalla Torre S., Das S., Dasgupta S., De Masi R., Dedek N., Demchenko D., Denisov O., Dhara L., Diaz V., Dinkelbach A., Donskov S., Dorofeev V., Doshita N., Duic V., Dünnweber W., Efremov A., Eversheim P., Eyrich W., Faessler M., Falaleev V., Fauland P., Ferrero A., Ferrero L., Finger M., Finger M., Fischer H., Franz J., Friedrich J., Frolov V., Fuchs U., Garfagnini R., Gautheron F., Gavrichtchouk O., Gerassimov S., Geyer R., Giorgi M., Gobbo B., Goertz S., Gorin A., Grajek O., Grasso A., Grube B., Guskov A., Haas F., Hannappel J., von Harrach D., Hasegawa T., Hedicke S., Heinsius F., Hermann R., Heß C., Hinterberger F., von Hodenberg M., Horikawa N., Horikawa S., Horn I., Ilgner C., Ioukaev A., Ishimoto S., Ivanchin I.
Nuclear Physics B 765 ( 1-2 ) 31 - 70 2007.3
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Nuclear Physics B
New high precision measurements of the Collins and Sivers asymmetries of charged hadrons produced in deep-inelastic scattering of muons on a transversely polarised 6 LiD target are presented. The data were taken in 2003 and 2004 with the COMPASS spectrometer using the muon beam of the CERN SPS at 160 GeV / c. Both the Collins and Sivers asymmetries turn out to be compatible with zero, within the present statistical errors, which are more than a factor of 2 smaller than those of the published COMPASS results from the 2002 data. The final results from the 2002, 2003 and 2004 runs are compared with naive expectations and with existing model calculations. © 2006 Elsevier B.V. All rights reserved.
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The deuteron spin-dependent structure function g1d and its first moment Reviewed
Yu. Alexakhin, Yu. Alexandrov, T. Matsuda et al.
Physics Letters B 647 8 - 17 2007.3
Language：English Publishing type：Research paper (scientific journal)
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A New measurement of the Collins and Sivers asymmetries on a transversely polarised deuteron target Reviewed
E.S. Ageev, V.Yu. Alexakhin, T. Matsuda et al.
Nuclear Physics B 765 31 - 70 2007.3
Language：English Publishing type：Research paper (scientific journal)
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Differential cross section and photon-beam asymmetry for the γ→n→K+Σ- Reaction at Eγ=1.5-2.4GeV
Kohri H., Ahn D., Ahn J., Akimune H., Asano Y., Chang W., Date' S., Ejiri H., Fukui S., Fujimura H., Fujiwara M., Hasegawa S., Hicks K., Hotta T., Imai K., Ishikawa T., Iwata T., Kawai H., Kim Z., Kino K., Kumagai N., Makino S., Mart T., Matsuda T., Matsumura T., Matsuoka N., Mibe T., Miyabe M., Miyachi Y., Morita M., Muramatsu N., Nakano T., Niiyama M., Nomachi M., Ohashi Y., Ohkuma H., Ooba T., Oshuev D., Rangacharyulu C., Sakaguchi A., Sasaki T., Shagin P., Shiino Y., Shimizu A., Shimizu H., Sugaya Y., Sumihama M., Toi Y., Toyokawa H., Wakai A., Wang C., Wang S., Yonehara K., Yorita T., Yoshimura M., Yosoi M., Zegers R.
Physical Review Letters 97 ( 8 ) 2006.8
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Physical Review Letters
Differential cross sections and photon-beam asymmetries have been measured for the γ→n→K+Σ- and γ→p→K+Σ0 reactions separately using liquid deuterium and hydrogen targets with incident linearly polarized photon beams of Eγ=1.5-2.4GeV at 0. 6 < cos¡ΘcmK < 1. The cross section ratio of σK+Σ-/ σK+Σ0, expected to be 2 on the basis of the isospin 1/2 exchange, is found to be close to 1. For the K+Σ- reaction, large positive asymmetries are observed, indicating the dominance of K* exchange. The large difference between the asymmetries for the K+Σ- and K+Σ0 reactions cannot be explained by simple theoretical considerations based on Regge model calculations. © 2006 The American Physical Society.
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Differential cross section and photon beam asymmetry for the #Eγ(/)→#ERn ---> K+Σ-- reaction at Eγ=1.5-2.4 GeV Reviewed
D.S. Ahn, J.K. Ahn, T. Matsuda et al.
Physical Review Letters 97 082003 - 5 2006.8
Language：English Publishing type：Research paper (scientific journal)
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Evidence for κ meson production in J/ψ → K̄*(892)<sup>0</sup>K<sup>+</sup>π- process
Ablikim M., Bai J., Ban Y., Bian J., Cai X., Chen H., Chen H., Chen H., Chen J., Chen J., Chen Y., Chi S., Chu Y., Cui X., Dai Y., Deng Z., Dong Q., Du S., Du Z., Fang J., Fang S., Fu C., Gao C., Gao Y., Gu S., Gu Y., Guo Y., Guo Y., Guo Z., Harris F., He K., He M., Heng Y., Hu H., Hu T., Huang G., Huang X., Huang X., Ishida M., Ishida S., Ji X., Jiang X., Jiao J., Jin D., Jin S., Jin Y., Komada T., Kurokawa S., Lai Y., Li G., Li H., Li H., Li J., Li R., Li S., Li W., Li W., Li X., Li X., Li Y., Liang Y., Liao H., Liu C., Liu F., Liu F., Liu H., Liu H., Liu J., Liu J., Liu J., Liu R., Liu Z., Lu F., Lu G., Lu H., Lu J., Luo C., Ma F., Ma H., Ma L., Ma Q., Ma X., Mao Z., Matsuda T., Mo X., Nie J., Peng H., Qi N., Qin H., Qiu J., Ren Z., Rong G., Shan L., Shang L., Shen D., Shen X., Sheng H., Shi F., Shi X.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 633 ( 6 ) 681 - 690 2006.2
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Based on 58 million BESII J/ψ events, the K̄*(892) 0 K + π - channel in K + K - π + π - is studied. A clear low mass enhancement in the invariant mass spectrum of K + π - is observed. The low mass enhancement does not come from background of other J/ψ decay channels, nor from phase space. Two independent partial wave analyses have been performed. Both analyses favor that the low mass enhancement is the κ, an iso-spinor scalar resonant state. The average mass and width of the κ in the two analyses are 878±23 -55 +64 MeV/c 2 and 499±52 -87 +55 MeV/c 2 , respectively, corresponding to a pole at (841±30 -73 +81 )-i(309±45 -72 +48 ) MeV/c 2 . © 2006 Elsevier B.V. All rights reserved.
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Gluon polarization in the nucleon from quasi-real photoproduction of high-p<inf>T</inf> hadron pairs
Ageev E., Alexakhin V., Alexandrov Y., Alexeev G., Amoroso A., Badelek B., Balestra F., Ball J., Baum G., Bedfer Y., Berglund P., Bernet C., Bertini R., Birsa R., Bisplinghoff J., Bordalo P., Bradamante F., Bravar A., Bressan A., Brona G., Burtin E., Bussa M., Bytchkov V., Cerini L., Chapiro A., Cicuttin A., Colantoni M., Colavita A., Costa S., Crespo M., Dalla Torre S., Dasgupta S., Dedek N., De Masi R., Denisov O., Dhara L., Diaz V., Dinkelbach A., Dolgopolov A., Donskov S., Dorofeev V., Doshita N., Duic V., Dünnweber W., Ehlers J., Eversheim P., Eyrich W., Fabro M., Faessler M., Falaleev V., Fauland P., Ferrero A., Ferrero L., Finger M., Finger M., Fischer H., Franz J., Friedrich J., Frolov V., Garfagnini R., Gautheron F., Gavrichtchouk O., Gerassimov S., Geyer R., Giorgi M., Gobbo B., Goertz S., Gorin A., Grajek O., Grasso A., Grube B., Grünemaier A., Hannappel J., Von Harrach D., Hasegawa T., Hedicke S., Heinsius F., Hermann R., Heß C., Hinterberger F., Von Hodenberg M., Horikawa N., Horikawa S., D'Hose N., Ijaduola R., Ilgner C., Ioukaev A., Ishimoto S.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 633 ( 1 ) 25 - 32 2006.2
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
We present a determination of the gluon polarization ΔG/G in the nucleon, based on the helicity asymmetry of quasi-real photoproduction events, Q 2 < 1 (GeV/c) 2 , with a pair of large transverse-momentum hadrons in the final state. The data were obtained by the COMPASS experiment at CERN using a 160 GeV polarized muon beam scattered on a polarized 6 LiD target. The helicity asymmetry for the selected events is 〈A∥/D〉=0.002±0.019(stat)±0.003(syst). From this value, we obtain in a leading-order QCD analysis ΔG/G=0.024±0. 089(stat)±0.057(syst) at x g =0.095 and μ2≃3 (GeV/c) 2 . © 2005 Elsevier B.V. All rights reserved.
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Gluon polarization in the nucleon from quasi-real photoproduction of high-pT hadron pairs. Reviewed
E.S. Ageev, V.Yu. Alexakhin, Yu. Alexandrov, G.D. Alexeev, A. Amoroso, T. Matsuda(118番目/202人)他196名
Physics Letters B 633 25 - 32 2006.2
Language：English Publishing type：Research paper (scientific journal)
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Evidence for κmeson production in J/ψ ---> anti-K* (892)0 K+ π- process.
M. Ablikim, J.Z. Bai, Y. Ban, J.G. Bian, T. Matsuda,(83番目/177人)他172名。
Physics Letters BVol. 633, pp.681-690 2006.2
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Near-threshold diffractive I-Meson photoproduction from the proton Reviewed
Mibe T., Chang W., Nakano T., Ahn D., Ahn J., Akimune H., Asano Y., Daté S., Ejiri H., Fujimura H., Fujiwara M., Hicks K., Hotta T., Imai K., Ishikawa T., Iwata T., Kawai H., Kim Z., Kino K., Kohri H., Kumagai N., Makino S., Matsuda T., Matsumura T., Matsuoka N., Miwa K., Miyabe M., Miyachi Y., Morita M., Muramatsu N., Niiyama M., Nomachi M., Ohashi Y., Ooba T., Ohkuma H., Oshuev D., Rangacharyulu C., Sakaguchi A., Sasaki T., Shagin P., Shiino Y., Shimizu H., Sugaya Y., Sumihama M., Titov A., Toi Y., Toyokawa H., Wakai A., Wang C., Wang S., Yonehara K., Yorita T., Yoshimura M., Yosoi M., Zegers R.
Physical Review Letters 95 ( 18 ) 2005.10
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review Letters
Photoproduction of a I meson on protons was studied by means of linearly polarized photons at forward angles in the low-energy region from threshold to Eγ=2.37GeV. The differential cross sections at t=-|t|min do not increase smoothly as Eγ increases but show a local maximum at around 2.0 GeV. The angular distributions demonstrate that I mesons are photoproduced predominantly by helicity-conserving processes, and the local maximum is not likely due to unnatural-parity processes. © 2005 The American Physical Society.
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Diffractive φ-meson photoproduction on the proton near threshold
T. Mibe, W.C. Chang, T. Nakano , D.S. Ahn, J.K. Ahn, H. Akimune, Y. Asano, T. Matsuda(23番目/55人)他47名
Physical Review Vol. 95, 182001. 2005.10
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Intermediate resonance excitation in the γp→pπ <sup>0</sup>π<sup>0</sup> reaction
Ahrens J., Altieri S., Annand J., Anton G., Arends H., Aulenbacher K., Beck R., Bradtke C., Braghieri A., Degrande N., D'Hose N., Dutz H., Goertz S., Grabmayr P., Hansen K., Harmsen J., Von Harrach D., Hasegawa S., Hasegawa T., Heid E., Helbing K., Holvoet H., Van Hoorebeke L., Horikawa N., Iwata T., Jahn O., Jennewein P., Kageya T., Kiel B., Klein F., Kondratiev R., Kossert K., Krimmer J., Lang M., Lannoy B., Leukel R., Lisin V., Matsuda T., McGeorge J., Meier A., Menze D., Meyer W., Michel T., Naumann J., Panzeri A., Pedroni P., Pinelli T., Preobrajenski I., Radtke E., Reichert E., Reicherz G., Rohlof C., Rosner G., Rostomyan T., Ryckbosch D., Sauer M., Schoch B., Schumacher M., Seitz B., Speckner T., Takabayashi N., Tamas G., Thomas A., Van De Vyver R., Wakai A., Weihofen W., Wissmann F., Zapadtka F., Zeitler G.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 624 ( 3-4 ) 173 - 180 2005.9
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
The helicity dependence of the total cross section for the γ→p→→pπ0π0 reaction has been measured for the first time at incident photon energies from 400 to 800 MeV. The measurement, performed at the tagged photon beam facility of the MAMI accelerator in Mainz, used the large acceptance detector DAPHNE and a longitudinally polarized frozen-spin target. This channel is found to be excited predominantly when the photon and proton have a parallel spin orientation, most likely due to the intermediate production of the D13(1520) resonance. However, the contribution of the antiparallel spin configuration, arising from other reaction mechanisms, is also not negligible. This result gives important new information to resolve the existing model discrepancies in the identification of the nucleon resonances contributing to this channel. © 2005 Elsevier B.V. All rights reserved.
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Intermediate Resonance Excitation in the γ P -> P π0 π0 Reaction.
J. Ahrens, S. Altieri, J.R.M. Annand, G. Anton, H.J. Arends, K. Aulenbacher, T. Matsuda(38番目/69人)他62名
Physics Letters B Vol. 624, pp.173-180. 2005.9
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Search for the Φ(1860) Pentaquark at COMPASS
E.S. Ageev, V.Yu. Alexakhin, Yu. Alexandrov, G.D. Alexeev, A. Amoroso, T. Matsuda(139番目/227人)他221名
European Physical Jouranal, C Vol. 41, pp.469-474. 2005.6
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Search for the Φ (1860) pentaquark at COMPASS Reviewed
Ageev E., Alexakhin V., Alexandrov Y., Alexeev G., Amoroso A., Badełek B., Balestra F., Ball J., Baum G., Bedfer Y., Berglund P., Bernet C., Bertini R., Birsa R., Bisplinghoff J., Bordalo P., Bradamante F., Bressan A., Brona G., Burtin E., Bussa M., Bytchkov V., Cerini L., Chapiro A., Cicuttin A., Colantoni M., Colavita A., Costa S., Crespo M., d'Hose N., Dalla Torre S., Dasgupta S., de Masi R., Dedek N., Denisov O., Dhara L., Diaz Kavka V., Dinkelbach A., Dolgopolov A., Donskov S., Dorofeev V., Doshita N., Duic V., Dünnweber W., Ehlers J., Eversheim P., Eyrich W., Faessler M., Falaleev V., Fauland P., Ferrero A., Ferrero L., Finger M., Fischer H., Franz J., Friedrich J., Frolov V., Fuchs U., Garfagnini R., Gautheron F., Gavrichtchouk O., Gerassimov S., Geyer R., Giorgi M., Gobbo B., Goertz S., Gorin A., Grajek O., Grasso A., Grube B., Grünemaier A., Hannappel J., von Harrach D., Hasegawa T., Hedicke S., Heinsius F., Hermann R., Heß C., Hinterberger F., von Hodenberg M., Horikawa N., Horikawa S., Ilgner C., Ioukaev A., Ishimoto S., Ivanov O., Iwata T., Jahn R., Janata A., Joosten R., Jouravlev N., Kabuß E., Kalinnikov V.
European Physical Journal C 41 ( 4 ) 469 - 474 2005.6
Language：English Publishing type：Research paper (scientific journal) Publisher：European Physical Journal C
Narrow Ξ - π ± and Ξ + π ± resonances produced by quasi-real photons have been searched for by the COMPASS experiment at CERN. The study was stimulated by the recent observation of an exotic baryonic state decaying into Ξ - π + , at a mass of 1862 MeV, interpreted as a pentaquark. While the ordinary hyperon states Ξ (1530) 0 and Ξ(1530) 0 are clearly seen, no exotic baryon is observed in the data taken in 2002 and 2003. © Springer-Verlag / Società Italiana di Fisica 2005.
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Alexakhin V., Alexandrov Y., Alexeev G., Amoroso A., Badełek B., Balestra F., Ball J., Baum G., Bedfer Y., Berglund P., Bernet C., Bertini R., Birsa R., Bisplinghoff J., Bradamante F., Bravar A., Bressan A., Burtin E., Bussa M., Cerini L., Chapiro A., Cicuttin A., Colantoni M., Colavita A., Costa S., Crespo M., d'Hose N., Dalla Torre S., Dasgupta S., de Masi R., Dedek N., Denisov O., Dhara L., Diaz Kavka V., Dolgopolov A., Donskov S., Dorofeev V., Doshita N., Duic V., Dünnweber W., Efremov A., Ehlers J., Eversheim P., Eyrich W., Fabro M., Faessler M., Fauland P., Ferrero A., Ferrero L., Finger M., Finger M., Fischer H., Franz J., Friedrich J., Frolov V., Fuchs U., Garfagnini R., Gautheron F., Gavrichtchouk O., Gerassimov S., Geyer R., Giorgi M., Gobbo B., Goertz S., Grajek O., Grasso A., Grube B., Grünemaier A., Gustafsson K., Hannappel J., von Harrach D., Hasegawa T., Hedicke S., Heinsius F., Hinterberger F., von Hodenberg M., Horikawa N., Horikawa S., Ijaduola R., Ilgner C., Ishimoto S., Iwata T., Jahn R., Janata A., Joosten R., Jouravlev N., Kabuß E., Kalinnikov V., Kang D., Karstens F., Kastaun W., Ketzer B., Khaustov G., Khokhlov Y., Kisselev Y., Klein F.
Physical Review Letters 94 ( 20 ) 2005.5
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review Letters
First measurements of the Collins and Sivers asymmetries of charged hadrons produced in deep-inelastic scattering of muons on a transversely polarized LiD6 target are presented. The data were taken in 2002 with the COMPASS spectrometer using the muon beam of the CERN SPS at 160GeV/c. The Collins asymmetry turns out to be compatible with zero, as does the measured Sivers asymmetry within the present statistical errors. © 2005 The American Physical Society.
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First Measurement of the Transverse Spin Asymmetries of the Deuteron in Semi-inclusive Deep Inelastic Scattering
V.Yu. Alexakhin, Yu. Alexandrov, G.D. Alexeev, A. Amoroso, T. Matsuda(129番目/205人)他200名
Physical ReviewLetters, Vol. 94, p.202002. 2005.5
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Measurement of the spin structure of the deuteron in the DIS region Reviewed
Ageev E., Alexakhin V., Alexandrov Y., Alexeev G., Amoroso A., Badełek B., Balestra F., Ball J., Baum G., Bedfer Y., Berglund P., Bernet C., Bertini R., Birsa R., Bisplinghoff J., Bordalo P., Bradamante F., Bravar A., Bressan A., Burtin E., Bussa M., Bytchkov V., Cerini L., Chapiro A., Cicuttin A., Colantoni M., Colavita A., Costa S., Crespo M., D'Hose N., Dalla Torre S., Dasgupta S., De Masi R., Dedek N., Denisov O., Dhara L., Diaz Kavka V., Dinkelbach A., Dolgopolov A., Donskov S., Dorofeev V., Doshita N., Duic V., Dünnweber W., Ehlers J., Eversheim P., Eyrich W., Fabro M., Faessler M., Falaleev V., Fauland P., Ferrero A., Ferrero L., Finger M., Finger M., Fischer H., Franz J., Friedrich J., Frolov V., Fuchs U., Garfagnini R., Gautheron F., Gavrichtchouk O., Gerassimov S., Geyer R., Giorgi M., Gobbo B., Goertz S., Gorin A., Grajek O., Grasso A., Grube B., Grünemaier A., Hannappel J., Von Harrach D., Hasegawa T., Hedicke S., Heinsius F., Hermann R., Heß C., Hinterberger F., Von Hodenberg M., Horikawa N., Horikawa S., Ijaduola R., Ilgner C., Ioukaev A., Ishimoto S., Ivanov O., Iwata T., Jahn R., Janata A.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 612 ( 3-4 ) 154 - 164 2005.4
Language：English Publishing type：Research paper (scientific journal) Publisher：Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
We present a new measurement of the longitudinal spin asymmetry A 1 d and the spin-dependent structure function g 1 d of the deuteron in the range 1 < Q 2 < 100 GeV 2 and 0.004 < x < 0.7. The data were obtained by the COMPASS experiment at CERN using a 160 GeV polarised muon beam and a large polarised 6 LiD target. The results are in agreement with those from previous experiments and improve considerably the statistical accuracy in the region 0.004 < x < 0.03. © 2005 Elsevier B.V. All rights reserved.
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Measurement of the spin structure of the deuteron in the DIS region
E.S. Ageev, V.Yu. Alexakhin, Yu. Alexandrov, G.D. Alexeev, A. Amoroso, T. Matsuda(152番目/231人)他225名
Physics Letters B Vol. 612, pp. 154-164. 2005.4
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The COMPASS polarized target Reviewed
Doshita N., Ball J., Baum G., Finger M., Gautheron F., Goertz S., Hasegawa T., Horikawa N., Ishimoto S., Iwata T., Kisselev Y., Koivuniemi J., Kondo K., Matsuda T., Meyer W., Neliba S., Reicherz G.
Czechoslovak Journal of Physics 55 ( 1 SUPPL. A ) 2005
Language：English Publishing type：Research paper (scientific journal) Publisher：Czechoslovak Journal of Physics
The spin structure of the nucleons is investigated by studying spin dependent process of deep inelastic scattering of a polarized muon beam and a polarized nucleon target in the COMPASS experiment since 2001. In order to achieve high luminosities it is necessary to use a large solid polarized target. The target consists of two independent and oppositely longitudinal polarized cells. The cells are filled with irradiated 6LiD granulated material. One of the characteristics of the polarized target is the spin reversal by magnetic field rotation in order to cancel the systematic error. The polarized target apparatus consists of a large refrigerator providing a low temperature of below 100 mK and a high cooling power with 200-300 mK, a superconducting magnet producing 2.5 T with good field homogeneity, two high power of a few watts microwave systems producing 70 GHz for Dynamic Nuclear Polarization (DNP) and 10NMR signals detection system for the polarization measurement.
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26pZA-4 2piO photoproduction at SPring-8 LEPS
Suzuki K., Date S., Fujimura H., Hasegawa S., Hicks K., Hotta T., Ishikawa T., Iwata T., Kawamura T., Kino K., Kohri H., Matsuda T., Matsumura T., Miyabe M., Muramatsu N., Nakano T., Niiyama M., Ohashi Y., Okamura K., Saito Y., Shiino Y., Sumihama M., Sugaya Y., Tajima Y., Toi Y., Tsuru T., Uchida M., Yonemura H., Yorita T., Yoshida H. Y., Shimizu H.
Meeting Abstracts of the Physical Society of Japan 60 ( 0 ) 2005
Language：English Publishing type：Research paper (scientific journal) Publisher：The Physical Society of Japan
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IIO M., HASEGAWA T., MATSUDA T., DAITO I., HORIKAWA N., TAGISHI Y., YAMAGUCHI M., SHINBA T., YOSHIMARU N., TAJIMA Y., ISHII S., IWATA T., KOBAYASHI T., INAGAKI T., DOSHITA N., KONDO K.
Ionizing radiation. 30 ( 4 ) 351 - 373 2004.10
Language：Japanese Publishing type：Research paper (scientific journal)
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Helicity dependence of the γp->Nπ channels and multipole analysis in the Δ region
J. Ahrens, S. Altieri, J.R.M. Annand, G. Anton, H.J. Arends, K. Aulenbacher, T. Matsuda(39番目/70人)他63名
European Physical Jouranal A Vol. 21, pp.323-333. 2004.8
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Helicity dependence of the γp → Nπ channels and multipole analysis in the Δ region
Ahrens J., Altieri S., Annand J., Anton G., Arends H., Aulenbacher K., Beck R., Bradtke C., Braghieri A., Degrande N., D'Hose N., Drechsel D., Dutz H., Goertz S., Grabmayr P., Hansen K., Harmsen J., Von Harrach D., Hasegawa S., Hasegawa T., Heid E., Helbing K., Holvoet H., Van Hoorebeke L., Horikawa N., Iwata T., Jahn O., Jennewein P., Kageya T., Keil B., Klein F., Kondratiev R., Kossert K., Krimmer J., Lang M., Lannoy B., Leulel R., Lisin V., Matsuda T., McGeorge J., Meier A., Menze D., Meyer W., Michel T., Naumann J., Panzeri R., Pedroni P., Pinelli T., Preobrajenski I., Radtke E., Reichert E., Reicherz G., Rohlof C., Rosner G., Ryckbosch D., Sauer M., Schoch B., Schumacher M., Seitz B., Speckner T., Takabayashi T., Tamas G., Thomas A., Tiator L., Van De Vyver R., Wakai A., Weihofen W., Wissmann F., Zapadtka F., Zeitler G.
European Physical Journal A 21 ( 2 ) 323 - 333 2004.8
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：European Physical Journal A
A high-quality double-polarization data set for the helicity dependence of the total and differential cross-sections for both γp → Nπ channels in the Δ region has been obtained in the framework of the GDH experiment. The experiment, performed at the Mainz microtron MAMI, used a 4π detection system, a circularly polarized photon beam, and a longitudinally polarized frozen-spin target. These data are included in the database to perform a multipole analysis to determine the properties of the Δ(1232)- resonance. For the resonant Δ(1232) multipoles we find a very good agreement with previous analyses, while the nonresonant ones show significant deviations.
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Spin asymmetries for events with high pT hadrons in DIS and an evaluation of the gluon polarization Reviewed
B. Adeva, E. Arik, T. Matsuda et al.
Physical Review D 70 012002 - 9 2004.7
Language：English Publishing type：Research paper (scientific journal)
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Adeva B., Arik E., Arvidson A., Badelek B., Baum G., Berglund P., Betev L., Birsa R., de Botton N., Bradamante F., Bravar A., Bressan A., Bültmann S., Burtin E., Crabb D., Cranshaw J., Çuhadar T., Dalla Torre S., van Dantzig R., Derro B., Deshpande A., Dhawan S., Dulya C., Eichblatt S., Fasching D., Feinstein F., Fernandez C., Frois B., Gallas A., Garzon J., Gilly H., Giorgi M., von Goeler E., Goertz S., Gracia G., de Groot N., Grosse Perdekamp M., Haft K., von Harrach D., Hasegawa T., Hautle P., Hayashi N., Heusch C., Horikawa N., Hughes V., Igo G., Ishimoto S., Iwata T., Kabuß E., Karev A., Kessler H., Ketel T., Kiryluk J., Kisselev Y., Klostermann L., Kowalik K., Kotzinian A., Kröger W., Kunne F., Kurek K., Kyynäräinen J., Lamanna M., Landgraf U., Le Goff J., Lehar F., de Lesquen A., Lichtenstadt J., Litmaath M., Magnon A., Mallot G., Marie F.
Physical Review D - Particles, Fields, Gravitation and Cosmology 70 ( 1 ) 2004.7
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review D - Particles, Fields, Gravitation and Cosmology
We present a measurement of the longitudinal spin cross section asymmetry for deep-inelastic muon-nucleon interactions with two high transverse momentum hadrons in the final state. Two methods of event classification are used to increase the contribution of the photon-gluon fusion process to above 30%. The most effective one, based on a neural network approach, provides the asymmetries A p ℓN→ℓhhX =0.030±0.057(stat)±0. 010(syst) and A d ℓN→ℓhhX =0.070±0. 076(stat)±0.010(syst). From these values we derive an averaged gluon polarization ΔG/G=-0.20±0.28(stat)±0.10(syst) at an average fraction of nucleon momentum carried by gluons 〈η〉 = 0.07.
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Performance of the COMPASS polarized target dilution refrigerator Reviewed
Doshita N., Ball J., Baum G., Berglund P., Gautheron F., Goertz S., Gustafsson K., Hasegawa T., Horikawa N., Ishimoto S., Iwata T., Kisselev Y., Koivuniemi J., Kondo K., Matsuda T., Meyer W., Reicherz G., Takabayashi N.
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 526 ( 1-2 SPEC. ISS. ) 138 - 143 2004.6
Language：English Publishing type：Research paper (scientific journal) Publisher：Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
The dynamic nuclear polarization (DNP) of 6 LiD requires 1 mW/g or more microwave power in the beginning of the process. With the material of 350 g, this gives more than 350 mW in total for the COMPASS polarized target. A temperature around 300 mK or below is needed for an efficient polarization. These low temperatures can only be achieved with a dilution refrigerator designed to operate with a 3 He flow of 100 mmol/s. In order to keep the polarization in the frozen mode, temperatures of about 65 mK are used with typical magnetic relaxation times of more than 1400 h at 0.42 T and of more than 15000 h at 2.5 T. Low lattice temperature is important in achieving high nuclear polarization. The base temperature is limited by the heat brought to the mixing chamber by the inlet 3 He and by radiation and conduction of heat. © 2004 Elsevier B.V. All rights reserved.
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Development of a polarized target for nuclear fusion experiments
Iio M., Daito I., Doshita N., Hasegawa T., Horikawa N., Inagaki T., Ishii S., Iwata T., Kobayashi T., Kondo K., Matsuda T., Okumura N., Shinba T., Tagishi Y., Tajima Y., Yamaguchi Y., Yoshimaru N.
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 526 ( 1-2 SPEC. ISS. ) 190 - 193 2004.6
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
A polarized deuterium target was developed for the use of the first measurement of the so-called complete spin dependent cross-sections of the D→(d→,p)T nuclear reaction at 20 MeV. In order to minimize the energy losses of incident and emitted particles in the target materials, the target thickness should be as thin as possible. A deuterated polyethylene foil of 30-50 μm thickness was used as polarized target. The deuterons contained in the foil are polarized by the dynamic nuclear polarization method in the magnetic field of 2.5 T. The polarized deuterium target system has been installed in the 1st experimental hall of the Tandem Accelerator Center at the University of Tsukuba. From the target asymmetry measurement of D→(d,d)D elastic scattering by a 20 MeV deuteron beam about 10% deuteron target polarization was confirmed. © 2004 Elsevier B.V. All rights reserved.
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Polarization measurement in the COMPASS polarized target Reviewed
Kondo K., Ball J., Baum G., Berglund P., Doshita N., Gautheron F., Goertz S., Hasegawa T., Horikawa N., Ishimoto S., Iwata T., Kisselev Y., Koivuniemi J., LeGoff J., Magnon A., Matsuda T., Meyer W., Reicherz G.
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 526 ( 1-2 SPEC. ISS. ) 70 - 75 2004.6
Language：English Publishing type：Research paper (scientific journal) Publisher：Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Continuous wave nuclear magnetic resonance (NMR) is used to determine the target polarization in the COMPASS experiment. The system is made of the so-called Liverpool Q-meters, Yale-cards, and VME modules for data taking and system controlling. In 2001 the NMR coils were embedded in the target material, while in 2002 and 2003 the coils were mounted on the outer surface of the target cells to increase the packing factor of the material. Though the error of the measurement became larger with the outer coils than with the inner coils, we have performed stable measurements throughout the COMPASS run time for 3 years. The maximum polarization was +57% and -53% as the average in the target cells. © 2004 Elsevier B.V. All rights reserved.
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Polarizarion Measurement in the COMPASS Polairized Target
K. Kondo, J. Ball, G. Baum, P. Berglund, N. Doshita, F. Gautheron, S. Goertz, T. Hasegawa, N. Horikawa, S. Ishimoto, T. Iwata, Y. Kiselev, J. Koivuniemi, J.M. LeGoff, A. Magnon, T. Matsuda, W. Meyer, G. Reicherz
Nuclear InstrumentsAnd Methods A, Vol. 526: pp.70-75. 2004.6
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Performance of the COMPASS Polarized Target Dilution Refrigerator
N. Doshita, J. Ball, G. Baum, P. Berglund, F. Gautheron, S. Goertz, K. Gustafsson, T. Hasegawa, N. Horikawa, S. Ishimoto, T. Iwata, Y. Kiselev, J. Koivuniemi, K. Kondo, T. Matsuda, W. Meyer, G. Reicherz, N. Takabayashi
Nuclear InstrumentsAnd Methods A, Vol. 526: pp.138-143. 2004.6
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Development of a polarized target for nuclear fusion experiments Reviewed
M. Iio, I. Daito, T. Matsuda et al.
Nuclear Instrments and Methods in Physic Research Section A 526 190 - 193 2004.6
Language：English Publishing type：Research paper (scientific journal)
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Horikawa S., Daito I., Gorin A., Hasegawa T., Horikawa N., Iwata T., Kuroda K., Manuilov I., Matsuda T., Miyachi Y., Riazantsev A., Sidorov A., Takabayashi N., Toeda T.
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 516 ( 1 ) 34 - 49 2004.1
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
An extensive study was performed on the development of fast and precise scintillating-fibre detectors with position-sensitive photomultipliers (PSPM) for application in high-rate experiments. Several detector prototypes with Kuraray multi-cladding fibres of 0.5 mm diameter and Hamamatsu 16-channel H6568 PSPMs were constructed and tested under different beam conditions at the CERN PS and SPS beam lines. High time resolution of the order of 300 ps (r.m.s.) was obtained with spatial resolution of about 125 μm (r.m.s.) and with detection efficiency in excess of 98%. The detector prototype equipped with a 3-m-long light guide was also tested and showed a time resolution of about 540 ps (r.m.s.). Results of tests using a high-intensity muon beam show excellent stability of the detector performances in time and spatial resolutions as well as in detection efficiency under beam fluxes of up to 1.4 × 10 8 muons per 2.4-second spill. © 2003 Elsevier B.V. All rights reserved.
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Development of a scintillating-fibre detector with position-sensitive photomultipliers for high-rate experiments
S. Horikawa, I. Daito, A. Gorin, T. Hasegawa, N. Horikawa, T. Iwata, K. Kuroda, I. Manuilov, T. Matsuda, Y. Miyachi, A. Ryazantsev, A. Sidorov, N. Takabayashi, T. Toeda
Nuclear Instrumentsand Methods A, Vol. 516, pp.34-49. 2004.1
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Ahrens J., Altieri S., Annand J., Anton G., Arends H., Aulenbacher K., Beck R., Bradtke C., Braghieri A., D'Hose N., Drechsel D., Dutz H., Goertz S., Grabmayr P., Hansen K., Harmsen J., Von Harrach D., Hasegawa S., Hasegawa T., Heid E., Helbing K., Holvoet H., Van Hoorebeke L., Horikawa N., Iwata T., Jahn O., Jennewein P., Kageya T., Kiel B., Klein F., Kondratiev R., Kossert K., Krimmer J., Lang M., Lannoy B., Leukel R., Lisin V., Matsuda T., McGeorge J., Meier A., Menze D., Meyer W., Michel T., Naumann J., Panzeri A., Pedroni P., Pinelli T., Preobrajenski I., Radtke E., Reichert E., Reicherz G., Rohlof C., Rosner G., Ryckbosch D., Sauer M., Schoch B., Schumacher M., Seitz B., Speckner T., Takabayashi N., Tamas G., Thomas A., Van de Vyver R., Wakai A., Weihofen W., Wissmann F., Zapadtka F., Zeitler G.
European Physical Journal A 17 ( 2 ) 241 - 244 2003.6
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：European Physical Journal A
The helicity dependence of the γ → p → pη reaction has been measured for the first time at a center-of-mass angle θ* η = 70° in the photon energy range from 780 MeV to 790 MeV. The experiment, performed at the Mainz microtron MAMI, used a 4π-detector system, a circularly polarized, tagged photon beam, and a longitudinally polarized frozen-spin target. The helicity 3/2 cross-section is found to be small and the results for helicity 1/2 agree with predictions from the MAID analysis.
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First measurement of the helicity-dependent γ↑p↑→pη di.erential cross-section
J. Ahrens, S. Altieri, J.R.M. Annand, G. Anton, H.J. Arends, K. Aulenbacher, T. Matsuda(38番目/67人) 他61名
European Physical Jouranal A 17, pp.241-244 2003.5
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Helicity dependence of the γp → nπ<sup>+</sup>π<sup>0</sup> reaction in the second resonance region
Ahrens J., Altier S., Annand J., Anton G., Arends H., Aulenbacher K., Beck R., Bradtke C., Braghieri A., Degrande N., D'Hose N., Dutz H., Goertz S., Grabmayr P., Hansen K., Harmsen J., Von Harrach D., Hasegawa S., Hasegawa T., Heid E., Helbing K., Holvoet H., Van Hoorebeke L., Horikawa N., Iwata T., Jahn O., Jennewein P., Kageya T., Kiel B., Klein E., Kondratiev R., Kossert K., Krimmer J., Lang M., Lannoy B., Leukel R., Lisin V., Matsuda T., McGeorge J., Meier A., Menze D., Meyer W., Michel T., Naumann J., Panzeri A., Pedroni P., Pinelli T., Preobrajenski I., Radtke E., Reichert E., Reicherz G., Rohlof C., Rosner G., Rostomyan T., Rovelli C., Ryckbosch D., Sauer M., Schoch B., Schumacher M., Seitz B., Speckner T., Takabayashi N., Tamas G., Thomas A., Van de Vyver R., Wakai A., Weihofen W., Wissmann F., Zapadtka F., Zeitler G.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 551 ( 1-2 ) 49 - 55 2003.1
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
The helicity dependence of the total cross section for the → nπ + π 0 reaction has been measured for the first time at incident photon energies from 400 to 800 MeV. The measurement was performed with the large acceptance detector DAPHNE at the tagged photon beam facility of the MAMI accelerator in Mainz. This channel is found to be excited predominantly when the photon and proton have a parallel spin orientation, due to the intermediate production of the D 13 resonance. © 2002 Elsevier Science B.V. All rights reserved.
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Helicity dependenceof the γ↑p↑→nπ+π0 reaction in the second resonance region.
J. Ahrens, S. Altieri, J.R.M. Annand, G. Anton, H.J. Arends, K. Aulenbacher, T. Matsuda(38番目/70人)他63名
Physics Letters B, Vol.551, pp.49?55. 2003.1
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Change on Surfaces of Metals by Low-Energy Ion Beam Irradiation
Kaminishi K., Kato F., Ooide M., Iio M., Setoyama S., Haiqiu L., Kobayashi J., Matsuda T., Hasegawa T.
Meeting Abstracts of the Physical Society of Japan 58 ( 0 ) 2003
Language：English Publishing type：Research paper (scientific journal) Publisher：The Physical Society of Japan
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Formation of blisters on the surface of metal by deuteron beam irradiation
Katoh Fumio, Kaminishi Kunio, Kurita Toshihiko, Matsuda Tatsuro, Hasegawa Takeo
Memoirs of the Faculty of Engineering, Miyazaki University 31 17 - 21 2002.7
Language：Japanese Publishing type：Research paper (bulletin of university, research institution) Publisher：Miyazaki University
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Helicity Amplitudes A1/2 and A3/2 for the D13(1520) Resonance Obtained from the γ↑p↑? p π0 Reaction
J. Ahrens, S. Altieri, J.R.M. Annand, G. Anton, H.J. Arends, K. Aulenbacher, T. Matsuda(39番目/71人)他64名
Physical ReviewLetters, Vol.88,p.232002, 5 pages. 2002.6
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A scintillation fibertracker with high timeresolution for high-rateexperiments.
S. Horikawa, I. Daito, N. Doshita, A. Gorin, T. Hasegawa, N. Horikawa, T. Iwata, K. Kondo, K. Kuroda, I. Manuilov, T. Matsuda, Y. Miyachi, A. Ryazantsev, N. Takabayashi, T. Toeda, S. Torimitsu
IEEE Transactions onNuclear Science, Vol. 49, pp.950-956. 2002.6
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25aZA-1 Formation of Blisters on Surfaces of Metals by Deutron Beam Irradiation
Kaminishi K, Kato F., Yano H., Kurita M., Iio M, Oota. K, Takahashi M., Osada E., Kasuga. T., Matuda T., Hasegawa T.
Meeting Abstracts of the Physical Society of Japan 57 ( 0 ) 2002
Language：English Publishing type：Research paper (scientific journal) Publisher：The Physical Society of Japan
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First Measurement ofthe Gerasimov-Drell-Hearn Integral for 1H from 200-MeV to 800-MeV
J. Ahrens, S. Altieri, J.R.M. Annand, G. Anton, H.J. Arends, K. Aulenbacher, T. Matsuda(37番目/69人)他62名
Physical ReviewLetters, Vol.87,p. 022003, 5 pages. 2001.7
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A scintillating fiber tracker with high time resolution for high-rate experiments
Horikawa S., Daito I., Doshita N., Horikawa N., Iwata T., Kondo K., Miyachi Y., Takabayashi N., Toeda T., Torimitsu S., Gorin A., Manuilov I., Riazantsev A., Hasegawa T., Matsuda T., Kuroda K.
IEEE Nuclear Science Symposium and Medical Imaging Conference 1 559 - 563 2001
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：IEEE Nuclear Science Symposium and Medical Imaging Conference
Fast and precise scintillating fiber tracker (SciFi), using 0.5 mm diameter fibers (Kuraray SCSF-78MJ) and position-sensitive photomultiplier tubes (Hamamatsu H6568), has been developed for COMPASS (NA58) experiment at CERN. Tests of a 16-channel prototype showed an excellent stability in time resolution, in spatial resolution as well as in detection efficiency under different beam flux of up to 1.4 × 10 8 muons/spill. Four SciFi stations have been constructed and all of them are presently under operation in the experiment with high performances as expected from the prototype.
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Helictiy Dependence of γp→Nπ below 450 MeV andContribution to theGerasimov-Drell-Hearn Sum Rule.
J. Ahrens, S. Altieri, J.R.M. Annand, G. Anton, H.J. Arends, K. Aulenbacher, T. Matsuda(37番目/69人)他61名
Physical ReviewLetters Vol. 84,pp.5950-5954. 2000.6
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Adams D., Adeva B., Akdogan T., Arik E., Arvidson A., Badelek B., Bardin G., Baum G., Berglund P., Betev L., Birsa R., Björkholm P., Bonner B., de Botton N., Boutemeur M., Bradamante F., Bravar A., Bressan A., Bültmann S., Burtin E., Cavata C., Clocchiatti M., Crabb D., Cranshaw J., Çuhadar T., Dalla Torre S., van Dantzig R., Derro B., Deshpande A., Dhawan S., Dulya C., Dyring A., Eichblatt S., Faivre J., Fasching D., Feinstein F., Fernandez C., Forthmann S., Frois B., Gallas A., Garzon J., Gatignon L., Gaussiran T., Gilly H., Giorgi M., von Goeler E., Goertz S., Golutvin I., Gracia G., de Groot N., Grosse Perdekamp M., Haft K., von Harrach D., Hasegawa T., Hautle P., Hayashi N., Heusch C., Horikawa N., Hughes V., Igo G., Ishimoto S., Iwata T., Kabub E., Kageya T., Karev A.
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 443 ( 1 ) 1 - 19 2000.3
Language：English Publishing type：Research paper (scientific journal) Publisher：Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
A muon beam polarimeter was built for the SMC experiment at the CERN SPS, for beam energies of 100 and 190 GeV. The beam polarization is determined from the asymmetry in the elastic scattering off the polarized electrons of a ferromagnetic target whose magnetization is periodically reversed. At muon energies of 100 and 190 GeV the measured polarization is P μ = -0.80±0.03 (stat.)±0.02 (syst.) and P μ = -0.797±0.011 (stat.)±0.012 (syst.), respectively. These results agree with measurements of the beam polarization using a shape analysis of the decay positron energy spectrum.
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Measurement of the SMC muon beam polarization using theasymmetry in the elastic scattering off polarized electrons.
D. Adams, B. Adeva, T. Akdogan, E. Arik, A. Arvidson, T. Matsuda(93番目/165人) 他159名
Nuclear Instrumentsand Methods A, Vol. 443, pp.1-19. 2000.3
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Helicity dependence of γ p → Nπ below 450 MeV and contribution to the gerasimov-drell-hearn sum rule
Ahrens J., Altieri S., Annand J., Anton G., Arends H., Aulenbacher K., Beck R., Bradtke C., Braghieri A., Degrande N., D'Hose N., Dutz H., Goertz S., Grabmayr P., Hansen K., Harmsen J., Von Harrach D., Hasegawa S., Hasegawa T., Heid E., Helbing K., Holvoet H., Van Hoorebeke L., Horikawa N., Iwata T., Jennewein P., Kageya T., Kiel B., Klein F., Kondratiev R., Kossert K., Krimmer J., Lang M., Lannoy B., Leukel R., Lisin V., Matsuda T., McGeorge J., Meier A., Menze D., Meyer W., Michel T., Naumann J., Owens R., Panzeri A., Pedroni P., Pinelli T., Preobrajenski I., Radtke E., Reichert E., Reicherz G., Rohlof C., Ryckbosch D., Sadiq F., Sauer M., Schoch B., Schumacher M., Seitz B., Speckner T., Steigerwald M., Takabayashi N., Tamas G., Thomas A., Van De Vyver R., Wakai A., Weihofen W., Wissmann F., Zapadtka F., Zeitler G.
Physical Review Letters 84 ( 26 ) 5950 - 5954 2000.1
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Physical Review Letters
The helicity dependence of the single pion photoproduction on the proton has been measured in the energy range from 200 to 450 MeV for the first time. The experiment, performed at the Mainz microtron MAMI, used a 4π-detector system, a circularly polarized, tagged photon beam, and a frozen-spin target. The data obtained provide new information for multipole analyses of pion photoproduction and determine the main contributions to the Gerasimov-Drell-Hearn sum rule and the forward spin polarizability γ 0 . © 2000 The American Physical Society.
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New frozen-spin target for 4π particle detection
Bradtke C., Dutz H., Peschel H., Goertz S., Harmsen J., Hasegawa S., Horikawa N., Iwata T., Kageya T., Matsuda T., Meier A., Meyer W., Radtke E., Reicherz G., Rohlof C., Thomas A., Wakai A.
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 436 ( 3 ) 430 - 442 1999.11
Language：English Publishing type：Research paper (scientific journal) Publisher：Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
A new frozen-spin target has been developed, that allows the detection of emitted particles in an angular acceptance of almost 4π in the laboratory frame. The central part of this new target represents a 3 He/ 4 He dilution refrigerator that is installed horizontally along the beam axis. The refrigerator includes an internal superconducting holding coil to maintain the nucleon polarization in the frozen-spin mode longitudinally to the beam. The design of the dilution refrigerator and the use of an internal holding coil enabled for the first time the measurement of a spin-dependent total cross section in combination with a polarized solid state target. This new frozen-spin target was used successfully to measure the helicity asymmetry of the total photoabsorption cross-section at the Mainz accelerator facility MAMI. This experiment has been performed in order to verify for the first time the GDH sum rule.
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A new frozen-spin target 4π particle detection
C. Bradtke, H. Dutz, H. Peschel, S. Goertz, J. Harmsen, S. Hasegawa, N. Horikawa, T. Iwata, T. Kageya, T. Matsuda, A. Meier, W. Meyer, E. Radtke, G. Reicherz, C. Rohlof, A. Thomas, A. Wakai
Nuclear Instrumentsand Methods A, Vol. 436, pp.430-442. 1999.11
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The polarized double cell target of the SMC.
D. Adams, B. Adeva, E. Arik, A. Arvidson, T. Matsuda(91番目/170人) 他165名
Nuclear Instrumentsand Methods A, Vol. 437, pp.23-67. 1999.11
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Large streamer chamber muon tracking detector in a high-flux fixed-target application Reviewed
Adams D., Adeva B., Arik E., Arvidson A., Badelek B., Ballintijn M., Bardin G., Baum G., Berglund P., Betev L., Bird I., Birsa R., Björkholm P., Bonner B., de Botton N., Boutemeur M., Bradamante F., Bravar A., Bressan A., Bültmann S., Burtin E., Cavata C., Crabb D., Cranshaw J., Çuhadar T., Dalla Torre S., van Dantzig R., Derro B., Deshpande A., Dhawan S., Dulya C., Dyring A., Eichblatt S., Faivre J., Fasching D., Feinstein F., Fernandez C., Forthmann S., Frois B., Gallas A., Garabatos C., Garzon J., Gaussiran T., Gilly H., Giorgi M., von Goeler E., Goertz S., Golutvin I., Gomez-Tato A., Gracia G., de Groot N., Grosse Perdekamp M., Gülmez E., Haft K., von Harrach D., Hasegawa T., Hautle P., Hayashi N., Heusch C., Horikawa N., Hughes V., Igo G., Ishimoto S., Iwata T., Kabub E., Kageya T., Karev A., Kessler H., Ketel T., Kiryluk J., Kiryushin I., Kishi A., Kisselev Y., Klostermann L., Kramer D., Kröger W.
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 435 ( 3 ) 354 - 374 1999.10
Language：English Publishing type：Research paper (scientific journal) Publisher：Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Arrays of limited streamer tubes of the Iarocci type were deployed in our experiment at CERN as part of a forward muon detector system with provisions for the beam to pass through the center of each panel in the array. A total of 16 4 m×4 m panels were assembled with inductive readout strips on both sides of each panel. An active feedback system was deployed to regulate the high voltage to the streamer tubes to insure a constant efficiency for minimum ionizing particles. The arrays were operated in this environment for over five years of data taking. Streamer tube track-reconstruction efficiencies and tube replacement rates are reported.
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Adeva B., Arik E., Arvidson A., Badełek B., Baum G., Berglund P., Betev L., Birsa R., De Botton N., Bradamante F., Bravar A., Bültmann S., Burtin E., Crabb D., Cranshaw J., Çuhadar T., Dalla Torre S., Van Dantzig R., Derro B., Deshpande A., Dhawan S., Dulya C., Eichblatt S., Fasching D., Feinstein F., Fernandez C., Froise B., Gallas A., Garzon J., Gilly H., Giorgi M., Goertz S., Garcia G., De Groot N., Grosse Perdekamp M., Haft K., Von Harrach D., Hasegawa T., Hautle P., Hayashi N., Heusch C., Horikawa N., Hughes V., Igo G., Ishimoto S., Iwata T., Kabuß E., Karev A., Kessler H., Ketel T., Kiryluk J., Kisselev Y., Krämer D., Kröger W., Kurek K., Kyynäräinen J., Lamanna M., Landgraf U., Le Goff J., Lehar F., De Lesquen A., Lichtenstadt J., Litmaath M., Magnon A., Mallot G., Marie F., Martin A., Martino J., Matsuda T., Mayes B., McCarthy J., Medved K., Meyer W., Van Middelkoop G., Miller D., Miyachi Y., Mori K., Nassalski J., Niinikoski T., Oberski J., Ogawa A., Ozben C., Pereira H., Perrot-Kunne F., Peshekhonov D., Piegaia R., Pinsky L., Platchkov S., Plo M., Pose D., Postma H., Pretz J., Puntaferro R., Rädel G.
Physical Review D - Particles, Fields, Gravitation and Cosmology 60 ( 7 ) 1 - 9 1999.10
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review D - Particles, Fields, Gravitation and Cosmology
We present the results of the spin asymmetries A 1 of the proton and the deuteron in the kinematic region extending down to x=6×10 -5 and Q 2 =0.01 GeV 2 . The data were taken with a dedicated low x trigger, which required hadron detection in addition to the scattered muon, so as to reduce the background at low x. The results complement our previous measurements and the two sets are consistent in the overlap region. No significant spin effects are found in the newly explored region. ©1999 The American Physical Society.
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Differential cross-section forthe reaction 12C(d,p)X at a primary momentum of 9 GeV/c and its tensor and vector analyzing powers.
L.S. Azhgirei, V.V. Arkhipov, S.V. Afanasev, T. Matsuda(42番目/45人)他41名
Physics of AtomicNuclei, Vol. 62, pp.1673-1686. 1999.10
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A large streamer chamber muon tracking detector in a high-flux fixed-target application
D. Adams, B. Adeva, E. Arik, A. Arvidson, T. Matsuda(92番目/173人)他168名
Nuclear Instrumentsand Methods A, Vol. 435, pp.354-374. 1999.10
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Spin asymmetries A1 of the proton and deuteron in the low xand low Q2 region from polarized high energy muon scattering.
B. Adeva, E. Arik, A. Arvidson, T. Matsuda(69番目/127人)他123名
Physical Review D,Vol. 60, p.072004. 17 pages. 1999.10
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Azhgirey L., Arkhipov V., Afanasiev S., Bondarev V., Wakai A., Ershov V., Ehara M., Zhmyrov V., Zaporozhets S., Zolin L., Isupov A., Iwata T., Kawano M., Kageya T., Kashirin V., Kirillov A., Kolesnikov V., Ladygin V., Litvinenko A., Malakhov A., Matsuda T., Migulina I., Nakayama H., Nikifirov A., Nomofilov A., Osada E., Penev V., Pilipenko Y., Reznikov S., Rukoyatkin P., Semenov A., Semenova I., Stoletov G., Strunov L., Takabayashi N., Filipov G., Fimushkin V., Fukui S., Hasegawa S., Hasegawa T., Horikawa N., Khrenov A., Chernykh E., Sharov V., Yudin N.
Physics of Atomic Nuclei 62 ( 10 ) 1673 - 1686 1999.10
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Physics of Atomic Nuclei
Experimental data on the differential cross section for the reaction 12 C(J, p)X at a primary momentum of 9 GeV/c and the proton emission angle of 85 mrad and on its tensor (A yy ) and vector (A y ) analyzing powers are presented. The differential cross section is satisfactorily described within the relativistic model of hard scattering by using conventional deuteron wave functions, while the behavior of the tensor analyzing power A yy , which remains positive up to the maximal value of the detected-proton momentum, is at odds with the predictions of this model. Nonzero values of the vector analyzing power A y suggest that the spin-dependent component of the NN-scattering amplitude plays a pronounced role in the mechanism of this reaction. Data on the differential cross section and the parameters A yy and A y have also been obtained for the reaction 12 C(d, d)X in the missing-mass region around 2.2 GeV/c 2 .
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Time resolution of multi-cladding scintillating fiber hodoscope Reviewed
Daito I., Gorin A., Hasegawa T., Horikawa N., Horikawa S., Iwata T., Kuroda K., Maki T., Manuilov I., Matsuda T., Mori K., Okada K., Riazantsev A., Takeutchi F., Takabayashi N., Toeda T., Wakai A.
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 433 ( 3 ) 587 - 591 1999.9
Language：English Publishing type：Research paper (scientific journal) Publisher：Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
A prototype of a scintillating fiber hodoscope was constructed with multi-cladding scintillating fibers and a multi anode photomultiplier (H6568, HAMAMTSU). The hodoscope has a seven structure of a scintillating fiber with 0.5 mm in diameter and stacked in closest packing in order to improve its efficiency and time resolution. The hodoscope has been tested using a proton beam. The time resolution of about 700 ps in FWHM has been obtained.
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Time resolution ofmulti-cladding scintillating fiberhodoscope.
I. Daito, A. Gorin, T. Hasegawa, N. Horikawa, S. Horikawa, T. Iwata, K. Kuroda, T. Maki, I. Manuilov, T. Matsuda, K. Mori, K. Okada, A. Ryazantsev, F. Takeutchi, N. Takabayashi, T. Toeda, A. Wakai
Nuclear Instrumentsand Methods A, Vol. 433, pp.587-591. 1999.9
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Time resolution of a scintillating fiber detector Reviewed
Horikawa S., Toeda T., Daito I., Doushita N., Hasegawa T., Horikawa N., Iwata T., Kibe Y., Matsuda T., Miyachi Y., Noboriguchi K., Takabayashi N., Tohyama T., Wakai A.
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 431 ( 1 ) 177 - 184 1999.7
Language：English Publishing type：Research paper (scientific journal) Publisher：Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
The performance of scintillating fiber detectors with 2m long light guides was investigated for COMPASS experiment, using a 450 MeV/c electron beam. Prototypes consisting of 0.5 mm diameter fibers (Kuraray SCSF-38 single-cladding) with the position-sensitive photomultipliers H6568 (Hamamatsu) were constructed for the test. The time resolution of σ approx. 430 ps was obtained with about 10 photoelectrons for the prototype of 10-layers structure.
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Time resolution of ascintillating fiber detector.
S. Horikawa, T. Toeda, I. Daito, N. Doushita, T. Hasegawa, N. Horikawa, T. Iwata, Y. Kibe, T. Matsuda, Y. Miyachi, K. Noboriguchi, N. Takabayashi, T. Tohyama, A. Wakai
Nuclear Instrumentsand Methods A, Vol. 431, pp.177-184. 1999.7
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31p-YA-4 The Measurement of Polarization of Irradiated Deuteraised Polyethylene
Doushita N., Ichihara T., Iwata T., Kondo K., Takabayashi N., Daito I., Tanoshima S., Toeda T., Toujyou T., Torimitsu S., Tooyama T., Hasegawa S., Hasegawa H., Fujimaki T., Horikawa N., Horikawa S., Matsuda T., Miyachi Y., Mori K., Wakai A.
Meeting Abstracts of the Physical Society of Japan 54 ( 0 ) 1999
Language：English Publishing type：Research paper (scientific journal) Publisher：The Physical Society of Japan
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26pSM-2 The Measurement of Polarization of lrradiated Deuteraised polyethylene II
KONDO K, OCHIHARA H, IWATA T, TAKABAYASHI N, DAITO I, TANOSHIMA S, DOUSHITA N, TOUJYOU T, TOEDA T, TOOYAMA T, TORIMITSU S, NAKAYAMA H, HASEGAWA S, HASEGAWA T, FUJIMAKI H, HORIKAWA N, HORIKAWA S, MATSUDA T, MIYACHI Y, MORI K, WAKAI A
Meeting Abstracts of the Physical Society of Japan 54 ( 0 ) 1999
Language：English Publishing type：Research paper (scientific journal) Publisher：The Physical Society of Japan
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23aSC-2 The Development of The NMR DAQ System on VME
MIYACHI Y, ICHIHARA H, IWATA T, KONDO K, TAKABAYASHI N, DAITO I, TANOSHIMA S, DOUSHITA N, TOUJYOU T, TOEDA T, TOOYAMA T, TORIMITSU S, NAKAYAMA H, HASEGAWA S, HASEGAWA T, FUJIMAKI H, HORIKAWA N, HORIKAWA S, MATSUDA T, MORI K, WAKAI A
Meeting Abstracts of the Physical Society of Japan 54 ( 0 ) 1999
Language：English Publishing type：Research paper (scientific journal) Publisher：The Physical Society of Japan
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Fragmentation of tensor polarized deuterons into cumulative pions
Afanasiev S., Arkhipov V., Bondarev V., Ehara M., Filipov G., Fukui S., Hasegawa S., Hasegawa T., Horikawa N., Isupov A., Iwata T., Kashirin V., Kawano M., Kageya T., Khrenov A., Kolesnikov V., Ladygin V., Litvinenko A., Malakhov A., Matsuda T., Nakayama H., Nikiforov A., Osada E., Pilipenko Y., Reznikov S., Rukoyatkin P., Semenov A., Semenova I., Takabayashi N., Wakai A., Zolin L.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 445 ( 1-2 ) 14 - 19 1998.12
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
The tensor analyzing power T 20 of the reaction d + A → π (0°) + X has been measured in the fragmentation of 9 GeV tensor polarized deuterons into pions with momenta from 3.5 to 5.3 GeV/c on hydrogen, beryllium and carbon targets. This kinematic range corresponds to the region of cumulative hadron production with the cumulative variable x c from 1.08 to 1.76. The values of T 20 have been found to be small and consistent with positive values. This contradicts the predictions based on a direct mechanism assuming NN collision between a high momentum nucleon in the deuteron and a target nucleon (NN → NNπ). © 1998 Elsevier Science B.V. All rights reserved.
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Adeva B., Arik E., Arvidson A., Badelek B., Baum G., Berglund P., Betev L., de Botton N., Bradamante F., Bradtke C., Bravar A., Bültmann S., Crabb D., Cranshaw J., Çuhadar T., Dalla Torre S., van Dantzig R., Derro B., Deshpande A., Dhawan S., Dulya C., Dutz H., Eichblatt S., Fasching D., Feinstein F., Fernandez C., Forthmann S., Frois B., Gallas A., Garzon J., Gehring R., Gilly H., Giorgi M., Goertz S., Gracia G., de Groot N., Grosse Perdekamp M., Haft K., Harmsen J., von Harrach D., Hasegawa T., Hautle P., Hayashi N., Heusch C., Horikawa N., Hughes V., Igo G., Ishimoto S., Iwata T., Kabuß E., Kageya T., Karev A., Ketel T., Kiryluk J., Kisselev Y., Kok E., Krämer D., Kröger W., Kurek K., Kyynäräinen J., Lamanna M., Landgraf U., Le Goff J., Lehar F., de Lesquen A., Lichtenstadt J., Litmaath M., Magnon A., Mallot G., Martin A., Matsuda T., Mayes B., McCarthy J., Medved K., Meyer W., van Middelkoop G., Miller D., Miyachi Y., Mori K., Nassalski J., Niinikoski T., Oberski J., Ogawa A.
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 419 ( 1 ) 60 - 82 1998.12
Language：English Publishing type：Research paper (scientific journal) Publisher：Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
The 1996 data taking of the SMC experiment used polarized protons to measure the spin-dependent structure function g 1 of the proton. Three liters of solid granular ammonia were irradiated at the Bonn electron linac in order to create the paramagnetic radicals which are needed for polarizing the protons. Proton polarizations of ± (90 ± 2.5)% were routinely reached. An analysis based on a theoretical line shape for spin-1 systems with large quadrupolar broadening was developed which allowed the nitrogen polarization in the ammonia to be determined with a 10% relative error. The measured quadrupolar coupling constant of 14 N agrees well with earlier extrapolated values. The polarization of the nitrogen nuclei was measured as a function of the proton polarization in order to provide a test of the equal spin temperature (EST) hypothesis. It was found to be closely valid under the dynamic nuclear polarization conditions with which the protons are polarized. Large deviations from EST could be induced by cross relaxing the proton and nitrogen spin systems at low fields. Nitrogen polarizations up to 40% were reached by these means. © 1998 Elsevier Science B.V. All rights reserved.
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Next-to-leading order QCD analysis of the spin structure function g<inf>1</inf> Reviewed
Adeva B., Akdogan T., Arik E., Badelek B., Bardin G., Baum G., Berglund P., Betev L., Birsa R., de Botton N., Bradamante F., Bravar A., Bressan A., Bültmann S., Burtin E., Cavata C., Crabb D., Cranshaw J., Çuhadai T., Dalla Torre S., van Dantzig R., Derro B., Deshpande A., Dhawan S., Dulya C., Eichblatt S., Fasching D., Feinstein F., Fernandez C., Forthmann S., Frois B., Gallas A., Garzon J., Gilly H., Giorgi M., von Goeler E., Goertz S., Gracia G., de Groot N., Grosse Perdekamp M., Haft K., von Harrach D., Hasegawa T., Hautle P., Hayashi N., Heusch C., Horikawa N., Hughes V., Igo G., Ishimoto S., Iwata T., Kabuß E., Kageya T., Karev A., Kessler H., Ketel T., Kiryluk J., Kisselev Y., Krämer D., Krivokhijine V., Kröger W., Kukhtin V., Kurek K., Kyynäräinen J., Lamanna M., Landgraf U., le Goff J., Lehar F., de Lesquen A., Lichtenstadt J., Litmaath M., Magnon A., Mallot G., Marie F., Martin A., Martino J., Matsuda T.
Physical Review D - Particles, Fields, Gravitation and Cosmology 58 ( 11 ) 1998.12
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review D - Particles, Fields, Gravitation and Cosmology
We present a next-to-leading order QCD analysis of the presently available data on the spin structure function g 1 including the final data from the Spin Muon Collaboration. We present results for the first moments of the proton deuteron, and neutron structure functions, and determine singlet and nonsinglet parton distributions in two factorization schemes. We also test the Bjorken sum rule and find agreement with the theoretical prediction at the level of 10%.
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Adeva B., Akdogan T., Arik E., Arvidson A., Badelek B., Bardin G., Baum G., Berglund P., Betev L., Bird I., Birsa R., Björkholm P., de Botton N., Boutemeur M., Bradamante F., Bravar A., Bressan A., Bültmann S., Burtin E., Cavata C., Crabb D., Cranshaw J., Çuhadar T., Dalla Torre S., van Dantzig R., Derro B., Deshpande A., Dhawan S., Dulya C., Dyring A., Eichblatt S., Faivre J., Fasching D., Feinstein F., Fernandez C., Forthmann S., Frois B., Gallas A., Garzon J., Gilly H., Giorgi M., von Goeler E., Goertz S., Golutvin I., Gracia G., de Groot N., Grosse Perdekamp M., Haft K., von Harrach D., Hasegawa T., Hautle P., Hayashi N., Heusch C., Horikawa N., Hughes V., Igo G., Ishimoto S., Iwata T., Kabuß E., Kageya T., Karev A., Kessler H., Ketel T., Kiryluk J., Kiryushin I., Kishi A., Kisselev Y., Klostermann L., Krämer D., Krivokhijine V., Kröger W., Kukhtin V., Kurek K., Kyynäräinen J., Lamanna M., Landgraf U.
Physical Review D - Particles, Fields, Gravitation and Cosmology 58 ( 11 ) 1998.12
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review D - Particles, Fields, Gravitation and Cosmology
We present the final results of the spin asymmetries A 1 and the spin structure functions g 1 of the proton and the deuteron in the kinematic range 0.0008 < x < 0.7 and 0.2 < Q 2 < 100 GeV 2 . For the determination of A 1 , in addition to the usual method which employs inclusive scattering events and includes a large radiative background at low x, we use a new method which minimizes the radiative background by selecting events with at least one hadron as well as a muon in the final state. We find that this hadron method gives smaller errors for x < 0.02, so it is combined with the usual method to provide the optimal set of results.
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Fragmentation of tensor polarized deuterons intocumulative pions.
S. Afanasev, V. Arkhipov, V. Bondarev, T. Matsuda(20番目/31人) 他27名
Phyiscs Letters B Vol. 445, pp. 14-19. 1998.12
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Next-to-leading order QCD analysis of the spin structurefunction g1
B. Adeva, T. Akdogan, E. Arik, T. Matsuda(76番目/139人)他135名
Physical ReviewD,Vol.58, p.112002 15 pages. 1998.12
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Spin asymmetries A1 and structure function g1 of the proton and the deuteron from polarizedhigh energy muon scattering.
B. Adeva, T. Akdogan, E. Arik, A. Arvidson, T. Matsuda(85番目/161人)他156名
Physical Review D,Vol. 58, p.112001, 17 pages. 1998.12
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Afanasiev S., Arkhipov V., Azhgirey L., Bondarev V., Chernykh E., Ehara M., Ershov V., Filipov G., Fimushkin V., Fukui S., Hasegawa S., Hasegawa T., Horikawa N., Isupov A., Iwata T., Kageya T., Kashirin V., Kawano M., Khrenov A., Kirillov A., Kolesnikov V., Ladygin V., Litvinenko A., Malakhov A., Matsuda T., Migulina I., Nakayama H., Nikiforov A., Nomofilov A., Osada E., Penev V., Pilipenko Y., Reznikov S., Rukoyatkin P., Semenov A., Semenova I., Sharov V., Stoletov G., Strunov L., Takabayashi N., Wakai A., Yudin N., Zaporozhets S., Zhmyrov V., Zolin L.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 434 ( 1-2 ) 21 - 27 1998.8
Language：English Publishing type：Research paper (scientific journal) Publisher：Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
The tensor analyzing power A yy in inclusive breakup of 9 GeV/c deuterons on carbon has been measured at the detected proton angle of 85 mr. The analyzing power remains positive at the highest measured momentum of the proton in definite contradiction with the predictions of the existing models. The vector analyzing power A y has been obtained simultaneously with A yy . © 1998 Published by Elsevier Science B.V. All rights reserved.
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Measurement of the tensor analyzing power Ayy in inclusivebreakup of 9 GeV/c deuterons on Carbon at large transversemomenta of protons.
S.V. Afanasev, V.V. Arkhipov, L.S. Azhgirei, T. Matsuda(43番目/45人) 他41名
Physics Letters B Vol. 434, pp. 21-27. 1998.8
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Polarised quark distributions in the nucleon from semi-inclusive spin asymmetries Reviewed
Adeva B., Akdogan T., Arik E., Arvidson A., Badelek B., Bardin G., Baum G., Berglund P., Betev L., Birsa R., de Botton N., Bradamante F., Bravar A., Bressan A., Bültmann S., Burtin E., Crabb D., Cranshaw J., Çuhadar T., Dalla Torre S., van Dantzig R., Derro B., Deshpande A., Dhawan S., Dulya C., Eichblatt S., Fasching D., Feinstein F., Fernandez C., Forthmann S., Frois B., Gallas A., Garzon J., Gilly H., Giorgi M., von Goeler E., Goertz S., Gracia G., de Groot N., Grosse Perdekamp M., Haft K., von Harrach D., Hasegawa T., Hautle P., Hayashi N., Heusch C., Horikawa N., Hughes V., Igo G., Ishimoto S., Iwata T., Kabuß E., Kageya T., Karev A., Kessler H., Ketel T., Kiryluk J., Kisselev Y., Krämer D., Krivokhijine V., Kröger W., Kukhtin V., Kurek K., Kyynäräinen J., Lamanna M., Landgraf U., Le Goff J., Lehar F., de Lesquen A., Lichtenstadt J., Litmaath M., Magnon A., Mallot G., Marie F., Martin A., Martino J., Matsuda T.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 420 ( 1-2 ) 180 - 190 1998.2
Language：English Publishing type：Research paper (scientific journal) Publisher：Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
We present a measurement of semi-inclusive spin asymmetries for positively and negatively charged hadrons from deep inelastic scattering of polarised muons on polarised protons and deuterons in the range 0.003 < x < 0.7 and Q 2 > 1 GeV 2 . Compared to our previous publication on this subject, with the new data the statistical errors have been reduced by nearly a factor of two. From these asymmetries and our inclusive spin asymmetries we determine the polarised quark distributions of valence quarks and non-strange sea quarks at Q 2 = 10 GeV 2 . The polarised u valence quark distribution, Δu υ (×), is positive and the polarisation increases with x. The polarised d valence quark distribution, Δd υ (x), is negative and the non-strange sea distribution, Δq - (x), is consistent with zero over the measured range of x. We find for the first moments (latin small letter esh) 1 0 Δu υ (x)d x = 0.77 ± 0.10 ± 0.08, (latin small letter esh) 1 0 Δd υ (x)d x = -0.52 ± 0.14 ± 0.09 and (latin small letter esh) 1 0 Δq - (x)d x = 0.01 ± 0.04 ± 0.03, where we assumed Δu - (x) = Δd - (x). We also determine for the first time the second moments of the valence distributions (latin small letter esh) 1 0 xΔq υ (x)d x. © 1998 Published by Elsevier Science B.V.
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Polarized quark distributionsin the nucleon from semi-inclusivespin asymmetries.
B. Adeva, T. Akdogan, E. Arik, A. Arvidson, T. Matsuda(73番目/140人)他135名
Physics Letters B Vol. 420, pp. 180-190. 1998.2
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magnetic field dependence of deuteron target polarization
DOUSHITA N., IINUMA T., IWATA T., IRIE S., KONDO K., TAKABAYASHI N., DAITO I., TOEDA T., TOUJYOU T., TOOYAMA T., HASEGAWA S., HASEGAWA H., HORIKAWA N., HORIKAWA S., MATSUDA T., MIYACHI Y., MORI K., WAKAI A.
Meeting Abstracts of the Physical Society of Japan 53 ( 0 ) 1998
Language：English Publishing type：Research paper (scientific journal) Publisher：The Physical Society of Japan
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Development of a beam profile monitor for γ-ray using scintillation fiber
IINUMA Tomohiko, IWATA Takahiro, EHARA Mikinori, OKAMOTO Kazumi, TAKABAYASHI Naoki, HASEGAWA Shoichi, FUKUI Shuji, HORIKAWA Sosuke, MORI Kunikazu, WAKAI Atsushi, HORIKAWA Naoaki, TAKAHASHI Masayuki, MATSUDA Tatsurou, NAKANO Takashi, HOTTA Tomoaki, FUJIWARA Mamoru, OHHASI Yuji, DATE Shin
Meeting Abstracts of the Physical Society of Japan 53 ( 0 ) 1998
Language：English Publishing type：Research paper (scientific journal) Publisher：The Physical Society of Japan
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magnetic field dependence of deuteron target polarization
IINUMA T., IWATA T., IRIE S., EHARA M., OKAMOTO K., KAGEYA T., TAKAHASHI S., TAKABAYASHI N., DOUSHITA N., TOOYAMA T., HASEGAWA S., HASEGAWA H., HORIKAWA N., MATSUDA T., MORI K., WAKAI A.
Meeting Abstracts of the Physical Society of Japan 53 ( 0 ) 1998
Language：English Publishing type：Research paper (scientific journal) Publisher：The Physical Society of Japan
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NLO QCD Analysis in the SMC experiment
ISHIMOTO Shigeru, IWATA Takahiro, OGAWA Akio, KAGEYA Tsuneo, HASEGAWA Takeo, HAYASHI Naoki, HORIKAWA Naoaki, MATSUDA Tatsuro, MIYACHI Yoshiyuki, MORI Kunikazu, SPIN MUON COLLABORATION
Meeting Abstracts of the Physical Society of Japan 53 ( 0 ) 1998
Language：English Publishing type：Research paper (scientific journal) Publisher：The Physical Society of Japan
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Afanasiev S., Anisimov Y., Fujieda M., Fukui S., Hasegawa T., Horikawa N., Isupov A., Iwata T., Izotov A., Kageya T., Koba K., Kolesnikov V., Litvinenko A., Malakhov A., Matsuda T., Miyachi Y., Nikiforov A., Perelygin V., Reznikov S., Rukoyatkin P., Semenov A., Semenova I., Wakai A., Zolin L.
Nuclear Physics A 625 ( 4 ) 817 - 831 1997.11
Language：English Publishing type：Research paper (scientific journal) Publisher：Nuclear Physics A
The tensor analyzing power T 20 for the reaction d ↑ + 12 C → π ± (0°) + X has been measured with a polarized deuteron beam from 6.2 to 9.0 GeV/c at a pion momentum of 3.0 GeV/c. This experiment is focused on "cumulatively produced pions", which are produced beyond the kinematically allowed limit for free nucleon-nucleon collisions. The measured values of T 20 turn out to be close to zero. They are in disagreement with the results of our impulse approximation calculation which is based on a single NN → πNN interaction and takes into account the internal motion of nucleons in the deuteron. Possible explanations of the result are discussed. © 1997 Elsevier Science B.V. PACS: 21.60.-n; 24.70.+s; 24.85.+p; 25.10.+s.
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Tensor analyzing power T20 for cumulative pion production from deuteron in the GeV region.
S. Afanasev, Yu. Anisimov, M. Fujieda, S. Fukui, T. Hasegawa, N. Horikawa, A. Isupov, T. Iwata, A. Izotov, T. Kageya, K. Koba, V. Kolesnikov, A. Litvinenko, A. Malakhov, T. Matsuda, Y. Miyachi, A. Nikiforov, V. Perelygin, S. Reznikov, P. Rukoyatkin, A. Se
Nuclear Physics AVol. 625, pp.817－831. 1997.11
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Spin structure of the proton from polarized inclusive deep-inelastice scattering.
D. Adams, B. Adeva, E. Arik, A. Arvidson, T. Matsuda(85番目/155人)他150名
Physical Review DVol. 56, pp.5330-5358. 1997.11
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Adeva B., Arik E., Arvidson A., Badelek B., Bardin G., Baum G., Berglund P., Betev L., Birsa R., de Botton N., Bradamante F., Bravar A., Bressan A., Bültmann S., Burtin E., Crabb D., Cranshaw J., Çuhadar T., Dalla Torre S., van Dantzig R., Derro B., Deshpande A., Dhawan S., Dulya C., Eichblatt S., Fasching D., Feinstein F., Fernandez C., Forthmann S., Frois B., Gallas A., Garzon J., Gilly H., Giorgi M., Goertz S., Gracia G., de Groot N., Haft K., Hautle P., Hayashi N., Heusch C., Horikawa N., Hughes V., Igo G., Ishimoto S., Iwata T., Kabuß E., Kageya T., Karev A., Ketel T., Kiryluk J., Kisselev Y., Krivokhijine V., Kröger W., Kuktin V., Kurek K., Kyynäräinen J., Lamanna M., Landgraf U., Le Goff J., Lehar F., de Lesquen A., Lichtenstadt J., Litmaath M., Magnon A., Mallot G., Marie F., Martin A., Martino J., Matsuda T., Mayes B., McCarthy J., Medved K., Meyer W., van Middelkoop G., Miller D., Miyachi Y., Mori K., Moromisato J.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 412 ( 3-4 ) 414 - 424 1997.10
Language：English Publishing type：Research paper (scientific journal) Publisher：Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
We present a new measurement of the virtual photon proton asymmetry A p 1 from deep inelastic scattering of polarized muons on polarized protons in the kinematic range 0.0008 < x < 0.7 and 0.2 < Q 2 < 100 GeV 2 . With this, the statistical uncertainty of our measurement has improved by a factor of 2 compared to our previous measurements. The spin-dependent structure function g p1 is determined for the data with Q 2 > 1 GeV 2 . A perturbative QCD evolution in next-to-leading order is used to determine g p 1 (x) at a constant Q 2 . At Q2 = 10 GeV 2 we find, in the measured range, ∫ 0.7 0.003 g p 1 (x)d x = 0.139 ± 0.006(stat) ± 0.008(syst) ± 0.006 (evol). The value of the first moment Γ p1 = ∫ 1 0 g p 1 (x)dx of g p 1 depends on the approach used to describe the behaviour of g p 1 at low x. We find that the Ellis-Jaffe sum rule is violated. With our published result for Γ d 1 we confirm the Bjorken sum rule with an accuracy of ≈ 15% at the one standard deviation level. © 1997 Elsevier Science B.V.
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A line-shape analysis for spin-1 NMR signals
Dulya C., Adams D., Adeva B., Arik E., Arvidson A., Badelek B., Ballintijn M., Bardin D., Bardin G., Baum G., Berglund P., Betev L., Bird I., Birsa R., Björkholm P., Bonner B., de Botton N., Boutemeur M., Bradamante F., Bressan A., Bültmann S., Burtin E., Cavata C., Crabb D., Cranshaw J., Çuhadar T., Dalla Torre S., van Dantzig R., Derro B., Deshpande A., Dhawan S., Dyring A., Eichblatt S., Faivre J., Fasching D., Feinstein F., Fernandez C., Frois B., Gallas A., Garzon J., Gaussiran T., Gehring R., Giorgi M., von Goeler E., Goertz S., Gomez F., Gracia G., de Groot N., Grosse Perdekamp M., Gülmez E., Harmsen J., von Harrach D., Hasegawa T., Hautle P., Hayashi N., Heusch C., Horikawa N., Hughes V., Igo G., ishimoto S., Iwata T., Kabuß E., Kageya T., Kalinovskaya L., Karev A., Kessler H., Ketel T., Kishi A., Kisselev Y., Klostermann L., Krämer D., Krivokhijine V., Kroger W., Kukhtin V., Rurek K., Kyynärämen J.
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 398 ( 2-3 ) 109 - 125 1997.10
Language：English Publishing type：Research paper (scientific journal) Publisher：Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
An analytic model of the deuteron absorption function has been developed and is compared to experimental NMR signals of deuterated butanol obtained at the SMC experiment in order to determine the deuteron polarization. The absorption function model includes dipolar broadening and a frequency-dependent treatment of the intensity factors. The high-precision TE signal data available are used to adjust the model for Q-meter distortions and dispersion effects. Once the Q-meter adjustment is made, the enhanced polarizations determined by the asymmetry and TE-calibration methods compare well within the accuracy of each method. In analyzing the NMR signals, the quadrupolar coupling constants could be determined for both the C-D and the O-D bonds of deuterated butanol.
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A line shape analysis for spin 1 NMR signals.
C. Dulya, D. Adams, B. Adeva, E. Arik, A. Arvidson, T. Matsuda(91番目/164人)他159名
Nuclear Instrumentsand Methods A, Vol.398, pp.109-125. 1997.10
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The spin dependent structure function g1(x) of the protonfrom polarized deep inelastic muon scattering.
B. Adeva, E. Arik, A. Arvidson, T. Matsuda(72番目/164人)他128名
Physics Letters B, Vol. 412, pp.414-424. 1997.10
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Adams D., Adeva B., Akdogan T., Arik E., Arvidson A., Badelek B., Ballintijn M., Bardin D., Bardin G., Baum G., Berglund P., Betev L., Bird I., Birsa R., Björkholm P., Bonner B., de Botton N., Boutemeur M., Bradamante F., Bravar A., Bressan A., Bültmann S., Burtin E., Cavata C., Crabb D., Cranshaw J., Çuhadar T., Dalla Torre S., van Dantzig R., Derro B., Deshpande A., Dhawan S., Dulya C., Dyring A., Eichblatt S., Faivre J., Fasching D., Feinstein F., Fernandez C., Frois B., Gallas A., Garzon J., Gaussiran T., Giorgi M., von Goeler E., Gomez F., Gratia G., de Groot N., Grosse-Perdekamp M., von Harrach D., Hasegawa T., Hautle P., Hayashi N., Heusch C., Horikawa N., Hughes V., Igo G., Ishimoto S., Iwata T., Kabuß E., Kageya T., Kalinovskaya L., Karev A., Kessler H., Ketel T., Kiryluk J., Kishi A., Kisselev Y., Klostermann L., Krämer D., Krivokhijine V., Kröger W.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 396 ( 1-4 ) 338 - 348 1997.3
Language：English Publishing type：Research paper (scientific journal) Publisher：Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
We present a new measurement of the spin-dependent structure function g d 1 of the deuteron from deep inelastic scattering of 190 GeV polarized muons on polarized deuterons. The results are combined with our previous measurements of g d 1 . A perturbative QCD evolution in next-to-leading order is used to compute g d 1 (x) at a constant Q 2 . At Q 2 = 10GeV 2 , we obtain a first moment Γ d 1 = ∫ 1 0 g d1 dx = 0.041 ± 0.008, a flavour-singlet axial charge of the nucleon a 0 = 0.30 ± 0.08, and an axial charge of the strange quark a s = -0.09 ± 0.03. Using our earlier determination Γ p 1 , we obtain Γ p 1 - Γ n1 = 0.183 ± 0.035 at Q 2 - 10GeV 2 . This result is in agreement with the Bjorken sum rule which predicts Γ p 1 - Γ n 1 = 0.186 ± 0.002 at the same Q 2 . © 1997 Published by Elsevier Science B.V.
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The Spin-Dependent Structure Function g１(x) of the Deuteronfrom Polarized Deep-InelasticMuon Scattering
D. Adams, B. Adeva, T. Akdogan, E. Arik, A. Arvidson, T. Matsuda(91番目/163人)他157名
Physics Letters B, Vol.396, pp.338-348. 1997.3
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Polarized deuteron beam acceleration at the KEK-PS Reviewed
Sato H., Toyama T., Shoji Y., Shirakata M., Marutsuka K., Yoshii M., Takano S., Arakawa D., Takasaki E., Adachi T., Kinsho M., Takagi A., Ikegami K., Machida S., Igarashi Z., Mori Y., Arvieux J., Fujieda M., Iwata T., Hayashi N., Kageya T., Fukui S., Horikawa N., Matsuda T., Koba K., Takahashi M., Hasegawa T.
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 385 ( 3 ) 391 - 397 1997.2
Language：English Publishing type：Research paper (scientific journal) Publisher：Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Polarized deuteron acceleration tests were performed at the KEK-PS. There is one weak intrinsic resonance at 8 GeV. The polarization was measured by an external polarimeter at 2 GeV following two patterns. The beam was extracted after deceleration to 2 GeV from 10.2 GeV in pattern 1 and just after acceleration up to 2 GeV in pattern 2. The polarization was almost the same in the two patterns, meaning that a polarized deuteron beam has been successfully accelerated up to 10.2 GeV at the KEK-PS.
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Polarized Deuteron Beam Acceleration at the KEK PS
H. Sato, T. Toyama, Y. Shoji, M. Shirakata, K. Marutsuka, M. Yoshii, S. Takano, D. Arakawa, E. Takasaki, T. Adachi, M. Kinsho, A. Takagi, K. Ikegami, S. Machida, Z. Igarashi, Y. Mori, J. Arvieux, M. Fujieda, T. Iwata, N. Hayashi, T. Kageya, S. Fukui, N. H
Nuclear InstrumentsandMethods A, Vol.385, pp.391-397. 1997.2
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Spin structure of the proton from polarized inclusive deep-inelastic muon-proton scattering Reviewed
Adams D., Adeva B., Arik E., Arvidson A., Badelek B., Ballintijn M., Bardin G., Baum G., Berglund P., Betev L., Bird I., Birsa R., Bjorkholm P., Bonner B., de Botton N., Boutemeur M., Bradamante F., Bravar A., Bressan A., Bultmann S., Burtin E., Cavata C., Crabb D., Cranshaw J., Çuhadar T., Dalla Torre S., van Dantzig R., Derro B., Deshpande A., Dhawan S., Dulya C., Dyring A., Eichblatt S., Faivre J., Fasching D., Feinstein F., Fernandez C., Frois B., Gallas A., Garzon J., Gaussiran T., Giorgi M., von Goeler E., Gracia G., de Groot N., Grosse Perdekamp M., Gulmez E., von Harrach D., Hasegawa T., Hautle P., Hayashi N., Heusch C., Horikawa N., Hughes V., Igo G., Ishimoto S., Iwata T., Kabuß E., Karev A., Kessler H., Ketel T., Kishi A., Kisselev Y., Klostermann L., Krämer D., Krivokhijine V., Kroger W., Kurek K., Kyynäräinen J., Lamanna M., Landgraf U., Layda T., Le Goff J., Lehar F., de Lesquen A.
Physical Review D - Particles, Fields, Gravitation and Cosmology 56 ( 9 ) 5330 - 5358 1997.1
Language：English Publishing type：Research paper (scientific journal) Publisher：Physical Review D - Particles, Fields, Gravitation and Cosmology
We have measured the spin-dependent structure function g p 1 in inclusive deep-inelastic scattering of polarized muons off polarized protons, in the kinematic range 0.003 < × < 0.7 and 1 GeV 2 < Q 2 < 60GeV 2 . A next-to-leading order QCD analysis is used to evolve the measured g p 1 (x,Q 2 ) to a fixed Q 2 0 . The first moment of g p 1 at Q 2 0 =10 GeV 2 is Γ p 1 =0.136±0.013 (stat) ±0.009 (syst) ±0.005 (evol). This result is below the prediction of the Ellis-Jaffe sum rule by more than two standard deviations. The singlet axial charge a 0 is found to be 0.28±0.16. In the Adler-Bardeen factorization scheme, Δg≃2 is required to bring ΔΣ in agreement with the quark-parton model. A combined analysis of all available proton, deuteron, and 3 He data confirms the Bjorken sum rule.
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Application of position-sensitive proportional counter to X-ray spectroscopy
Hasegawa T., Fukumori T., Kaminishi K., Matsuda T.
Japanese Journal of Applied Physics, Part 2: Letters 35 ( 9 B ) 1996.12
Language：English Publishing type：Research paper (scientific journal) Publisher：Japanese Journal of Applied Physics, Part 2: Letters
A small position-sensitive counter with a single resistive anode wire was constructed for use in a double-crystal X-ray spectrometer system. Using this position detector we have measured Kα doublet X-rays in the positions of which are very close together and obtained the two corresponding rocking curves simultaneously, to determine the lattice constant differences in various crystals.
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Application ofPosition-Sensitive ProportionalCounter to X-RaySpectroscopy
T. Hasegawa, T. Fukumori, K. Kaminishi, T. Matsuda
Japanese Journalof Applied Physics,Vol. 35, L pp.1225-L1226. 1996.9
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Large enhancement of deuteron polarization with frequency modulated microwaves Reviewed
Adeva B., Arik E., Ahmad S., Arvidson A., Badelek B., Ballintijn M., Bardin G., Baum G., Berglund P., Betev L., Bird I., Birsa R., Björkholm P., Bonner B., de Botton N., Boutemeur M., Bradamante F., Bressan A., Brüll A., Buchanan J., Bültmann S., Burtin E., Cavata C., Chen J., Clement J., Clocchiatti M., Corcoran M., Crabb D., Cranshaw J., Çuhadar J., Dalla Torre S., Deshpande A., van Dantzig R., Day D., Dhawan S., Dulya C., Dyring A., Eichblatt S., Faivre J., Fasching D., Feinstein F., Fernandez C., Frois B., Garabatos C., Garzon J., Gaussiran T., Giorgi M., von Goeler E., Golutvin I., Gomez A., Gracia G., de Groot N., Grosse Perdekamp M., Gülmez E., von Harrach D., Hasegawa T., Hautle P., Hayashi N., Heusch C., Horikawa N., Hughes V., Igo G., Ishimoto S., Iwata T., de Jong M., Kabuß E., Kageya T., Kaiser R., Karev A., Kessler H., Ketel T., Kiryushin I., Kishi A., Kisselev Y., Klostermann L., Krämer D., Krivokhijine V., Kukhtin V., Kyynäräinen J., Lamanna M., Landgraf U., Lau K., Layda T., Le Goff J., Lehar F., de Lesquen A.
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 372 ( 3 ) 339 - 343 1996.4
Language：English Publishing type：Research paper (scientific journal) Publisher：Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
We report a large enhancement of 1.7 in deuteron polarization up to values of 0.6 due to frequency modulation of the polarizing microwaves in a two liter polarized target using the method of dynamic nuclear polarization. This target was used during a deep inelastic polarized muon-deuteron scattering experiment at CERN. Measurements of the electron paramagnetic resonance absorption spectra show that frequency modulation gives rise to additional microwave absorption in the spectral wings. Although these results are not understood theoretically, they may provide a useful testing ground for the deeper understanding of dynamic nuclear polarization.
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Large enhancement ofdeuteron polarization with frequency molulated microwaves
B. Adeva, E. Arik, A. Arvidson, T. Matsuda(97番目/174人)他170名
Nuclear Instrumentsand Methods A, Vol.372, pp. 339-343.Erratum-ibid. A, Vol.376, p.490. 1996.4
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Adeva B., Arik E., Arvidson A., Badelek B., Ballintijn M., Bardin G., Baum G., Berglund P., Betev L., Bird I., Birsa R., Björkholm P., Bonner B., de Botton N., Bradamante F., Bressan A., Bültmann S., Burtin E., Cavata C., Crabb D., Cranshaw J., Çuhadar T., Dalla Torre S., van Dantzig R., Deshpande A., Dhawan S., Dulya C., Dyring A., Eichblatt S., Faivre J., Fasching D., Feinstein F., Fernandez C., Frois B., Garzon J., Gaussiran T., Giorgi M., von Goeler E., Gomez A., Gracia G., de Groot N., Grosse Perdekamp M., Gülmez E., von Harrach D., Hasegawa T., Hautle P., Hayashi N., Heusch C., Horikawa N., Hughes V., Igo G., Ishimoto S., Iwata T., Kabuß E., Kageya T., Karev A., Kessler H., Ketel T., Kishi A., Kisselev Y., Klostermann L., Kramer D., Krivokhijine V., Kröger W., Kyynäräinen J., Lamanna M., Landgraf U., Layda T., Le Goff J., Lehar F., de Lesquen A., Lichtenstadt J., Litmaath M., Lopez-Ponte S., Lowe M., Magnon A., Mallot G., Marie F., Martin A., Martino J., Matsuda T., Mayes B., McCarthy J., Medved K., van Middelkoop G., Miller D., Mori K., Moromisato J., Nagaitsev A.
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 369 ( 1 ) 93 - 100 1996.2
Language：English Publishing type：Research paper (scientific journal) Publisher：Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
We present a measurement of semi-inclusive spin asymmetries for positively and negatively charged hadrons from deep inelastic scattering of polarised muons on polarised protons and deuterons in the range 0.003 < x < 0.7. From these asymmetries and the previously published inclusive spin asymmetries we determine, for the first time, the x-dependent spin distributions for up and down valence quarks and for non-strange sea quarks. We find that the first moments of the valence quark spin distributions are Δu v = 1.01 ± 0.19 ± 0.14 and Δd v = -0.57 ± 0.22 ± 0.11. The spin distribution function of non-strange sea quarks is consistent with zero over the measured range of x and the first moment is Δū = Δd̄ = -0.02 ± 0.09 ± 0.03.
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Polarization of valence and nonstrange sea quarks in the nucleon from semiinclusive spinasymmetries
B. Adeva, E. Arik, A. Arvidson, T. Matsuda(81番目/142人)他147名
Physics Letters B,Vol.369, pp.93-100. 1996.2
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A new measurement of the spin-dependent structure function g<inf>1</inf>(x) of the deuteron
Adams D., Adeva B., Arik E., Arvidson A., Badelek B., Ballintijn M., Bardin G., Baum G., Berglund P., Betev L., Birsa R., Björkholm P., Bonner B., de Botton N., Bradamante F., Bressan A., Bültmann S., Burtin E., Cavata C., Clocchiatti M., Crabb D., Cranshaw J., Çuhadar T., Dalla Torre S., van Dantzig R., Deshpande A., Dhawan S., Dulya C., Dyring A., Eichblatt S., Fasching D., Feinstein F., Fernandez C., Frois B., Garzon J., Giorgi M., von Goeler E., Gracia G., Granier de Cassagnac R., de Groot N., Grosse Perdekamp M., Gülmez E., von Harrach D., Hasegawa T., Hautle P., Hayashi N., Heusch C., Horikawa N., Hughes V., Igo G., Ishimoto S., Iwata T., Kabuß E., Kageya T., Karev A., Kessler H., Ketel T., Kishi A., Kisselev Y., Klostermann L., Krämer D., Krivokhijine V., Kröger W., Kurek K., Kyynäräinen J., Lamanna M., Landgraf U., Le Goff J., Lehar F., de Lesquen A., Lichtenstadt J., Litmaath M., Lopez-Ponte S., Lowe M., Magnon A., Mallot G., Marie F., Martin A., Martino J., Matsuda T., Mayes B., McCarthy J., Medved K., van Middelkoop G., Miller D., Mori K., Moromisato J., Nagaitsev A., Nassalski J.
Physics Letters B 357 ( 1-2 ) 248 - 254 1995.8
Language：English Publishing type：Research paper (scientific journal) Publisher：Physics Letters B
We present a new measurement of the spin-dependent structure function g 1 d of the deuteron in deep inelastic scattering of 190 GeV polarised muons on polarised deuterons, in the kinematic range 0.003 < x < 0.7 and 1 GeV 2 < Q 2 < 60 GeV 2 . This structure function is found to be negative at small x. The first moment Γ 1 d =∫ 0 1 g 1 d dx evaluated at Q 0 2 = 10 GeV 2 is 0.034 ± 0.009 (stat.) ± 0.006 (syst.). This value is below the Ellis-Jaffe sum rule prediction by three standard deviations. Using our earlier determination of Γ 1 p , we obtain Γ 1 p - Γ 1 n = 0.199 ± 0.038 which agrees with the Bjorken sum rule. © 1995.
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A new measurement of the spin dependent structure functiong１(x) of the deuteron
D. Adams, B. Adeva, E. Arik, A. Arvidson, T.Matsuda(80番目/141人)他136名
Physics Letters B, Vol.357,pp. 248-254. 1995.8
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KEK-PS Experiment 248(AIDA)
S. Fukui, T. Hasegawa, T. Matsuda他27名
Proc. the Workshop on Hadron Physics at e+e- collider, Oct. 14-18, 1994, IHEP Beijing, ed. X. Fan et al, pp.38-41. 1994.10
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New Results on Spectroscopy from BENKEI
K. Takamatsu, H. Aoyagi, S. Fukui, T. Hasegawa, N. Hayashi, N. Horikawa, J. Iizuka, S. Inaba, S. Ishimoto, Y. Ishizaki, T. Iwata, E. Kanatani, H. Kawai, T. Kinashi, A. Kishi, K. Kobayashi, Y. Kobayashi, K. Matsuda, T. Matsuda, K. Mori, T. Nakagawa, S. Nak
Nuovo CimentoVol.107A,pp.1925-1939. 1994.10
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New results on spectroscopy from BENKEI Reviewed
Aoyagi H., Fukui S., Hasegawa T., Hayashi N., Horikawa N., Iizuka J., Inaba S., Ishimoto S., Ishizaki Y., Iwata T., Kanatani E., Kawai H., Kinashi T., Kishi A., Kobayashi K., Kobayashi Y., Matsuda K., Matsuda T., Mori K., Nakagawa T., Nakamura S., Nakamura T., Nakanishi T., Narita A., Ohmi K., Ohmori C., Samoto T., Shimizu H., Tajima Y., Takamatsu K., Takasaki M., Tsubaki T., Tsuchiya K., Tsuru T., Yamauchi I., Yasu Y., Yoshida H., Wakai A.
Il Nuovo Cimento A 107 ( 10 ) 1925 - 1939 1994.10
Language：English Publishing type：Research paper (scientific journal) Publisher：Il Nuovo Cimento A
New results on meson spectroscopy at KEK are presented. Experimental data on the reaction π - p→ηπ - p at 6.3 GeV/c have been collected by the Benkei spectrometer at the 12 GeV proton synchrotron to the aim of searching for IJ PC =11 -+ states in the ηπ - system. A marked forward-backward asymmetry of the events is observed in the Gotffired-Jackson frame of the ηπ - system. The result of the partial-wave analysis shows a clear bump of the P + wave around 1320 MeV/c 2 . Checks for the result and the analysis are discussed. © 1994 Società Italiana di Fisica.
DOI： 10.1007/BF02823587
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Spin asymmetry inmuon-proton deep inelastic scattering on a transversely polarized target
D. Adams, B. Adeva, E. Arik, A. Arvidson, T. Matsuda(86番目/150人)他145名
Physics Letters, B,Vol. 336, pp.125-130. 1994.9
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Measurement of thespin-dependent structure functiong１(x) of the proton
D. Adams, B. Adeva, E. Arik, A. Arvidson, T. Matsuda(86番目/150人)他145名
Physics Letters, B,Vol. 329, pp.399-406<Erratum>Physics Letters B, Vol.339, pp. 332-333. 1994.6
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Uehara S., Abe K., Amako K., Arai Y., Arima T., Asano Y., Chiba M., Chiba Y., Daigo M., Fukawa M., Fukushima Y., Haba J., Hanai H., Hemmi Y., Higuchi M., Hinode F., Hirose T., Homma Y., Hosoda N., Ishihara N., Iwata Y., Kanda N., Kanematsu N., Kanzaki J., Kikuchi R., Kondo T., Korhonen T., Krüger A., Kurashige H., MacNaughton J., Matsuda E., Matsui T., Miura M., Miyake K., Mori S., Nagashima Y., Nakagawa Y., Nakamura T., Nakano I., Odaka S., Ogawa K., Ohama T., Ohsugi T., Ohyama H., Okamoto A., Ono A., Oyama T., Sakamoto H., Sakuda M., Sato M., Sato N., Shioden M., Shirai J., Shirakata M., Sumiyoshi T., Suzuki A., Takada Y., Takaki H., Takasaki F., Takita M., Tamura N., Tobimatsu K., Tsuboyama T., Unno Y., Utsumi M., Watase Y., Yabuki F., Yamada Y., Yamagata T., Yamamoto Y., Yonezawa Y., Yoshida H.
Zeitschrift für Physik C Particles and Fields 63 ( 2 ) 213 - 218 1994.6
Language：English Publishing type：Research paper (scientific journal) Publisher：Zeitschrift für Physik C Particles and Fields
Experimental studies of open charm production in two-photon processes have been performed. In the measurement, charmed hadrons were identified by electrons from their semi-leptonic decays. The result was compared with calculations based on the direct process and photon-gluon fusion process by resolved photons. We found that the effect of the gluon component in a photon is substantial in the observed events. © 1994 Springer-Verlag.
DOI： 10.1007/BF01411012
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Study of the ηπ<sup>-</sup> system in the π<sup>-</sup>p reaction at 6.3 GeV/c Reviewed
Aoyagi H., Fukui S., Hasegawa T., Hayashi N., Horikawa N., Iizuka J., Inaba S., Ishimoto S., Ishizaki Y., Iwata T., Kanatani E., Kawai H., Kinashi T., Kishi A., Kobayashi K., Matsuda K., Matsuda T., Mori K., Nakagawa T., Nakamura S., Nakamura T., Nakanishi T., Narita A., Ohmi K., Ohmori C., Samoto T., Shimizu H., Tajima Y., Takamatsu K., Takasaki M., Tsubaki T., Tsuchiya K., Tsuru T., Yamauchi I., Yasu Y., Yoshida H., Wakai A.
Physics Letters B 314 ( 2 ) 246 - 254 1993.9
Language：English Publishing type：Research paper (scientific journal) Publisher：Physics Letters B
Data of the ηπ - system were obtained in the reaction π - p → ηπ - p at 6.3 GeV/c beam momentum. About 17 k events of ηπ - were collected in the mass range 0.8 ≤ M ηπ - ≤ 1.8 GeV/c 2 and in the range of the momentum transfer squared 0.075 ≤ |t′| ≤ 0.60 (GeV/c) 2 . A large forward-backward asymmetry was observed around 1.3 GeV/c 2 in the Gottfried-Jackson frame of the ηπ - system. A partial wave analysis of the data was performed. A peak of the D + wave attributed to a 2 (1320) is clearly seen. An enhancement is observed around 1.3 GeV/c 2 in the P + wave. © 1993.
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Development of Cerenkov counter utilized silika-aerogel of low refractive index
Kai Zenichiro, Nakayama Hirofumi, Matsuda Tatsuro et al.
Bulletin of the Faculty of Engineering, Miyazaki University 39 21 - 29 1993.8
Language：Japanese Publishing type：Research paper (bulletin of university, research institution) Publisher：Miyazaki University
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Study of theηπ－system in π－p reaction at 6.3 GeV/c
H. Aoyagi, S. Fukui, T. Hasegawa, N. Hayashi, N. Horikawa, J. Iizuka, S. Inaba, S. Ishimoto, Y. Ishizaki, T. Iwata, E. Kanatani, H. Kawai, T. Kinashi, A. Kishi, K. Kobayashi, Y. Kobayashi, K. Matsuda, T. Matsuda, K. Mori, T. Nakagawa, S. Nakamura, T. Naka
Physics Letters B, Vol.314, pp.246-254. 1993.6
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Partial Wave Analysis, π－p →ωπ０n
T. Kinashi, S. Fukui, N. Horikawa, S. Inaba, T. Inagaki, Y. Inagaki, Y. Ishizaki, T. Iwata, M. Kurashina, I. Maeda, T. Matsuda, K. Mori, T. Nakamura, T. Nakanishi, K. Ohmi, C. Ohmori, T. Sato, K. Takamatsu, R. Takashima, T. Tsuru, Y. Yasu
Proc. 4th InternationalConf.(HADRON91)"Hadron Spectroscopyand Structure",WorldScientific, pp.40-45. 1992.4
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Sakanaka S., Dohmae K., Hayashi N., Horikawa N., Iwata T., Kishi A., Matsuda T., Nakanishi T., Okumi S., Wakai A., Mori K.
Review of Scientific Instruments 62 ( 7 ) 1859 - 1860 1991.12
Language：English Publishing type：Research paper (scientific journal) Publisher：Review of Scientific Instruments
A high-speed nuclear-magnetic-resonance (NMR) data-acquisition system, incorporating a personal computer, has been developed to determine the polarization of the polarized target for high-energy physics experiments. A dedicated analog-to-digital converter (ADC) board is used for automatic ADC sampling synchronizing with an internal clock. Within about 1.5 s, 128 NMR signals are obtained and the averaged signal is derived.
DOI： 10.1063/1.1142383
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Fukui S., Horikawa N., Inaba S., Inagaki T., Inagaki Y., Ishizaki Y., Iwata T., Kinashi T., Kurashina M., Maeda I., Matsuda T., Mori K., Nakamura T., Nakanishi T., Ohmi K., Ohmori C., Sato T., Takamatsu K., Takashima R., Tsuru T., Yasu Y.
Physics Letters B 267 ( 2 ) 293 - 298 1991.9
Language：English Publishing type：Research paper (scientific journal) Publisher：Physics Letters B
A further study on the ηππ system in the charge exchange reaction π - p→ηπ + π - n at 8.95 GeV/c has been performed at KEK. A partial wave analysis was done for three t′ regions, 0-0.05, 0.05-0.20 and 0.20-0.60 (GeV/c) 2 in the mass range between 1.155 and 1.555 GeV. The IJ pc =00 -+ wave via a 0 (980)π intermediate state shows clear peaks of η(1295) and η(1400) in the third t′ region. The state η(1400) shows a mass value of 1388±4 MeV. The 01 ++ wave via a 0 π shows also a clear peak of f 1 (1285) in the third t′ region. The higher mass region between 1.51 and 1.83 GeV was also studied for the same three t′ regions. No I=0 pseudoscalar state is seen in the analysis. © 1991.
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Study on theηππ－ system in theπ－p charge exchangereaction at 8.95 GeV/c
S. Fukui, N. Horikawa, S. Inaba, T. Inagaki, Y. Inagaki, Y. Ishizaki, T. Iwata, T. Kinashi, M. Kurashina, I. Maeda, T. Matsuda, K. Mori, T. Nakamura, T. Nakanishi, K. Ohmi, C. Ohmori, T. Sato, K. Takamatsu, R. Takashima, T. Tsuru, Y. Yasu
Physics Letters B, Vol. 267, pp.293-298. 1991.9
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A high speed nuclear magnetic resonance data acqusition systemwith a personal computer for apolarized target in high energy physics
S. Sakanaka, K. Dohmae, N. Hayashi, N. Horikawa, T. Iwata, A. Kishi, T. Matsuda, T. Nakanishi, S. Okumi, A. Wakai, K. Mori
Review of ScientificInstruments, Vol. 62, pp.1859-1860. 1991.7
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The axial vector resonances, a1 and h1, in the π- ρ charge exchange reaction.
K. Ohmi, A. Ando, S. Fukui, N. Horikawa, K. Imai, S. Inaba, T. Inagaki, Y. Inagaki, Y. Ishizaki, A. Itano, T. Iwata, T. Kinashi, S. Kobayashi, M. Kurashina, I. Maeda, K. Maruyama, T. Matsuda, K. Mori, A. Murakami, T. Nakamura, T. Nakanishi, C. Ohmori, H.
Proc. RheinfelsWorkshop 1990"Hadron MassSpectrum",NuclearPhysics B(Proc.Suppl.)Vol. 21, pp.168-173. 1991.6
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Study on the ωπ０andηπ－ Systems in theπ－p Reaction at KEK
T. Tsuru, S. Fukui, N. Horikawa, S. Inaba, T. Inagaki, Y. Ishizaki, T. Iwata, T. Kinashi, M. Kurashina, I. Maeda, T. Matsuda, K. Mori, T. Nakamura, T. Nakanishi, K. Ohmi, C. Ohmori, T. Sato, K. Takamatsu, R. Takashima, T. Tsuru, Y. Yasu, J. Aoyagi, T. Has
Proc. RheinfelsWorkshop 1990"Hadron MassSpectrum",NuclearPhysics B(Proc.Suppl.)Vol. 21, pp.168-173. 1991.6
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Study on the ωπ<sup>0</sup> and νπ<sup>-</sup> systems in the π<sup>-</sup>p reaction at KEK Reviewed
Fukui S., Horikawa N., Inaba S., Inagaki T., Inagaki Y., Ishizaki Y., Iwata T., Kinashi T., Kurashina M., Maeda I., Matsuda T., Mori K., Nakamura T., Nakanishi T., Ohmi K., Ohmori C., Sato T., Takamatsu K., Takashima R., Tsuru T., Yasu Y., Aoyagi J., Fukui S., Hasegawa T., Hayashi N., Horikawa N., Iizuka J., Inaba S., Ishimoto S., Ishizaki Y., Iwata T., Kanatani E., Kawai H., Kinashi T., Kishi J., Kobayashi K., Kobayashi S., Kobayashi Y., Matsuda K., Matsuda T., Mori K., Nakagawa T., Nakamura S., Nakamura T., Nakanishi T., Narita A., Ohmi K., Ohmori C., Okumi S., Samoto T., Shimizu H., Takamatsu K., Takasaki M., Tsubaki T., Tsuchiya T., Tsuru T., Yamauchi I., Yasu Y., Yoshida H., Wakai A.
Nuclear Physics B (Proceedings Supplements) 21 ( C ) 168 - 173 1991.6
Language：English Publishing type：Research paper (scientific journal) Publisher：Nuclear Physics B (Proceedings Supplements)
Experimental studies on the ωπ 0 and νπ - systems in the π - p reactions have been performed at KEK. The moment analysis of the ωπ 0 system shows a clear peak of b 1 0 (1235) in the IJ pc = 11 +- wave. In the 11 -- wave, no clear peak is seen. The properties of C(1480) with 11 -- and ρ{variant}(1450) are discussed taking into account upper limits of their cross sections. The experiment on the νπ - system was planned to search for an exotic resonance with IJ pc = 11 -+ . The data taking run was finished and an analysis is under way. © 1991.
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Ando A., Fukui S., Horikawa N., Imai K., Inaba S., Inagaki T., Inagaki Y., Ishizaki Y., Itano A., Iwata T., Kobayashi S., Kurashina M., Maeda I., Maruyama K., Matsuda T., Mori K., Murakami A., Nakamura T., Nakanishi T., Ohmi K., Ohmori C., Okuno H., Sasaki A., Sato T., Shirai J., Takamatsu K., Takashima R., Tamura N., Tsuru T., Yasu Y.
Nuclear Physics B (Proceedings Supplements) 21 ( C ) 98 - 102 1991.6
Language：English Publishing type：Research paper (scientific journal) Publisher：Nuclear Physics B (Proceedings Supplements)
A partial-wave analysis based on the isobar model has been carried out for a high statistics π + π - π 0 data in the π - p charge exchange reaction in the mass range between 0.88 and 1.44 GeV. Two axial-vector resonances, a 1 (1260) and h 1 (1170), were observed in the analysis. The masses and widths of a 1 and h 1 were determined by fitting the partial-wave amplitude to the Breit Wigner formula at four t' regions. © 1991.
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Study of theηπ－ System in π－p reaction at 6 GeV/c
T. Matsuda, J. Aoyagi, S. Fukui, T. Hasegawa, N. Hayashi, N. Horikawa, J. Iizuka, S. Inaba, S. Ishimoto, Y. Ishizaki, T. Iwata, E. Kanatani, H. Kawai, T. Kinashi, J. Kishi, K. Kobayashi, Y. Kobayashi, K. Matsuda, K. Mori, T. Nakagawa, S. Nakamura, T. Naka
Proc. 4th InternationalConf.(HADRON 91) "Hadron Spectroscopyand Structure", World Scientific, pp.34-39. 1991.4
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Study of the ωπ<sup>0</sup> system in the π<sup>-</sup>p charge exchange reaction at 8.95 GeV/c Reviewed
Fukui S., Horikawa N., Inaba S., Inagaki T., Inagaki Y., Ishizaki Y., Iwata T., Kinashi T., Kurashina M., Maeda I., Matsuda T., Mori K., Nakamura T., Nakanishi T., Ohmi K., Ohmori C., Sato T., Takamatsu K., Takashima R., Tsuru T., Yasu Y.
Physics Letters B 257 ( 1-2 ) 241 - 246 1991.3
Language：English Publishing type：Research paper (scientific journal) Publisher：Physics Letters B
An experimental study was made of a ωπ 0 system produced in the charge exchange reaction π - p→ωπ 0 n at 8.95 GeV/c. The moment analysis was performed to study the spin-parity of the system in the mass region between 1.04 and 1.88 GeV. A clear peak of b 1 (1235) was observed in the J PC = 1 +- wave. No significant structure was seen in the 1 -- wave. An upper limit is obtained to be at most 1.9 μb for σ(π - p→X 0 n)Br(X 0 →ωπ 0 ) for X 0 with a width of 130 MeV at 1480 MeV, where C(1480) meson with J PC = 1 -- has been reported in a φπ 0 decay mode. © 1991.
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Study of ωπ０ system in theπ－p charge exchange reaction at8.95 GeV/c
S. Fukui, N. Horikawa, S. Inaba, T. Inagaki, Y. Inagaki, Y. Ishizaki, T. Iwata, T. Kinashi, M. Kurashina, I. Maeda, T. Matsuda, K. Mori, T. Nakamura, T. Nakanishi, K. Ohmi, C. Ohmori, T. Sato, K. Takamatsu, R. Takashima, T. Tsuru, Y. Yasu
Physics Letters B, Vol. 257, pp.241-246. 1991.3
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Analyzing power of C and Cu ( p →, 2p) quasi-elastic scattering at 3.5 GeV
Ohmori C., Horikawa N., Ishida Y., Iwata T., Kinashi T., Maeda I., Matsuda T., Nakanishi T., Okumi S., Takeda Y., Toyama T., Hiramatsu S., Ishimoto S., Mori Y., Sato H., Tsuru T., Hasegawa T., Kobayashi Y., Nakagawa T., Hasai H., Iwatani K., Nishiyama F., Mori K., Ueno A., Holt J.
Physics Letters B 243 ( 1-2 ) 29 - 32 1990.6
Language：English Publishing type：Research paper (scientific journal) Publisher：Physics Letters B
Analyzing powers have been measured for the quasi-elastic ( p →, 2p) scattering in carbon and copper using a KEK 3.5 GeV polarized proton beam. The present result shows relatively larger analyzing powers compared with the ones obtained for carbon in the energy region 0.52-2.8 GeV at Saclay (Saturne). The t-dependence for C and Cu ( p →, 2p) is compared with a calculation based on the relativistic impulse approximation and is reproduced well. © 1990.
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Analyzing power of C and Cu(p,2p) quasi-elastic scattering at 3.5 GeV
C. Ohmori, N. Horikawa, Y. Ishida, T. Iwata, T. Kinashi, I. Maeda, T. Matsuda, T. Nakanishi, S. Okumi, Y. Takeda, T. Toyama , Y. Kobayashi, T. Nakagawa , S. Hiramatsu, S. Ishimoto, Y. Mori, H. Sato, T. Tsuru , T. Hasegawa , K. Mori , K. Iwatani, H. Hasai,
Physics Letters B, Vol.243, pp.29-32. 1990.6
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Measurement of analyzing power at forward angle for elastic pd scattering at 3.5 GeV
Ohmori C., Horikawa N., Ishida Y., Iwata T., Kinashi T., Maeda I., Matsuda T., Nakanishi T., Okumi S., Sakai K., Takeda Y., Toyama T., Yasuno M., Kobayashi Y., Nakagawa T., Hiramatsu S., Ishimoto S., Mori Y., Sato H., Tsuru T., Hasegawa T., Mori K., Iwatani K., Hasai H., Nishiyama F., Ueno A., Holt J.
Physics Letters B 230 ( 1-2 ) 27 - 30 1989.10
Language：English Publishing type：Research paper (scientific journal) Publisher：Physics Letters B
The analyzing power for elastic pd scattering at 3.5 GeV has been measured in the region 0.1≤-t≤1.5 (GeV/c) 2 , using the polarized proton beam at KEK. The angular distribution shows a behavior similar to that in the lower energy region. It is reproduced fairly well by the predictions of a multiple scattering model based on the Glauber theory. © 1989.
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Measurement of Analyzing Power at Forward Angle forElastic pd Scattering at 3.5 GeV
C. Ohmori, N. Horikawa, Y. Ishida, T. Iwata, T. Kinashi, I. Maeda, T. Matsuda, T. Nakanishi, S. Okumi, Y. Takeda, T. Toyama , Y. Kobayashi, T. Nakagawa , S. Hiramatsu, S. Ishimoto, Y. Mori, H. Sato, T. Tsuru , T. Hasegawa , K. Mori , K. Iwatani, H. Hasai,
Physics Letters B, Vol. 230, pp.27-30. 1989.10
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Proton polarimeter for high energy experiments at KEK
Ohmori C., Horikawa N., Ishida Y., Iwata T., Kinashi T., Maeda I., Matsuda T., Nakanishi T., Okumi S., Takeda Y., Toyama T., Kobayashi Y., Nakagawa T., Hiramatsu S., Ishimoto S., Mori Y., Sato H., Tsuru T., Hasegawa T., Mori K., Iwatani K., Hasai H., Nishiyama F., Ueno A., Holt J.
Nuclear Inst. and Methods in Physics Research, A 278 ( 3 ) 705 - 712 1989.6
Language：English Publishing type：Research paper (scientific journal) Publisher：Nuclear Inst. and Methods in Physics Research, A
A polarimeter for the polarized proton beam has been constructed at KEK. The measurement of the beam polarization at 3.5 GeV was performed by the newly constructed polarimeter. Monitoring of the beam polarization during the experiment was successfully done by a polyethylene target. The present paper describes the structure, the characteristics and the results of practical use for the experiment. © 1989.
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Proton Polarimeter for High Energy Experiment at KEK
C. Ohmori, N. Horikawa, Y. Ishida, T. Iwata, T. Kinashi, I. Maeda, T. Matsuda, T. Nakanishi, S. Okumi, Y. Takeda, T. Toyama , Y. Kobayashi, T. Nakagawa , S. Hiramatsu, S. Ishimoto, Y. Mori, H. Sato, T. Tsuru , T. Hasegawa , K. Mori , K. Iwatani, H. Hasai,
Nuclear Instrumentsand Methods A, Vol. 278, pp.705-712. 1989.6
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Fukui S., Horikawa N., Inaba S., Inagaki T., Inagaki Y., Ishizaki Y., Iwata T., Kinashi T., Kurashina M., Maeda I., Matsuda T., Mori K., Nakamura T., Nakanishi T., Ohmi K., Ohmori C., Sato T., Takamatsu K., Takashima R., Tsuru T., Yasu Y.
Physics Letters B 202 ( 3 ) 441 - 446 1988.3
Language：English Publishing type：Research paper (scientific journal) Publisher：Physics Letters B
High statistics data of the ηππ system in π - p→ηπ + π - n were obtained. A partial wave analysis was performed in the mass region between 1.37 and 1.85 GeV. Resonant structures were observed in the IJ PC = 11 -- wave around 1.6 GeV and in 13 -- around 1.7 GeV. The structure in 11 -- was fitted with a single Breit-Wigner and also fitted with two Breit-Wigner's. The result suggests the possible existence of two vector resonances around 1.6 GeV. The structure in 13 -- is considered to be the π 3 (1690). © 1988.
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Vector Resonances around 1.6GeV of theηπ＋π－ System in theπ－P Charge ExchangeReaction at 8.95 GeV/c
S. Fukui, N. Horikawa, S. Inaba, T. Inagaki, Y. Inagaki, Y. Ishizaki, T. Iwata, T. Kinashi, M. Kurashina, I. Maeda, T. Matsuda, K. Mori, T. Nakamura, T. Nakanishi, K. Ohmi, C. Ohmori, T. Sato, K. Takamatsu, R. Takashima, T. Tsuru, Y. Yasu
Physics Letters B, Vol. 202, pp.441-446. 1988.3