Papers - MATSUDA Tatsuro
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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%.