Search For Exclusive Photoproduction Of Z(C)(+/-) (3900) At Compass

C. Adolph,R. Akhunzyanov,M. G. Alexeev,G. D. Alexeev,A. Amoroso,V. Andrieux,V. Anosov,A. Austregesilo,B. Badelek,F. Balestra,J. Barth,G. Baum,R. Beck,Y. Bedfer,A. Berlin,J. Bernhard,K. Bicker,E. R. Bielert,J. Bieling,R. Birsa,J. Bisplinghoff,M. Bodlak,M. Boer,P. Bordalo,F. Bradamante,C. Braun,A. Bressan, M. Buechele,E. Burtin,L. Capozza,M. Chiosso,S. U. Chung,A. Cicuttin,M. L. Crespo,Q. Curiel,S. Dalla Torre,S. S. Dasgupta,S. Dasgupta,O. Yu. Denisov,S. V. Donskov,N. Doshita,V. Duic, W. Duennweber,M. Dziewiecki,A. Efremov,C. Elia,P. D. Eversheim,W. Eyrich,M. Faessler,A. Ferrero,A. Filin,M. Finger,M. Finger,H. Fischer,C. Franco,N. Du Fresne Von Hohenesche,J. M. Friedrich,V. Frolov,F. Gautheron,O. P. Gavrichtchouk,S. Gerassimov,R. Geyer,I. Gnesi,B. Gobbo,S. Goertz,M. Gorzellik, S. Grabmueller,A. Grasso,B. Grube,T. Grussenmeyer,A. Guskov,F. Haas,D. Von Harrach,D. Hahne,R. Hashimoto,F. H. Heinsius,F. Herrmann,F. Hinterberger,Ch. Hoeppner,N. Horikawa,N. D'Hose,S. Huber,S. Ishimoto,A. Ivanov,Yu. Ivanshin,T. Iwata,R. Jahn,V. Jary,P. Jasinski, P. Joerg,R. Joosten,E. Kabuss,B. Ketzer,G. V. Khaustov,Yu. A. Khokhlov,Yu. Kisselev,F. Klein,K. Klimaszewski,J. H. Koivuniemi,V. N. Kolosov,K. Kondo, K. Koenigsmann,I. Konorov,V. F. Konstantinov,A. M. Kotzinian,O. Kouznetsov, M. Kraemer,Z. V. Kroumchtein,N. Kuchinski,F. Kunne,K. Kurek,R. P. Kurjata,A. A. Lednev,A. Lehmann,M. Levillain,S. Levorato,J. Lichtenstadt,A. Maggiora,A. Magnon,N. Makke,G. K. Mallot,C. Marchand,A. Martin,J. Marzec,J. Matousek,H. Matsuda,T. Matsuda,G. Meshcheryakov,W. Meyer,T. Michigami,Yu. V. Mikhailov,Y. Miyachi,A. Nagaytsev,T. Nagel,F. Nerling,S. Neubert,D. Neyret,V. I. Nikolaenko,J. Novy,W. -D. Nowak,A. S. Nunes,A. G. Olshevsky,I. Orlov,M. Ostrick,R. Panknin,D. Panzieri,B. Parsamyan,S. Paul,D. V. Peshekhonov,S. Platchkov,J. Pochodzalla,V. A. Polyakov,J. Pretz,M. Quaresma,C. Quintans,S. Ramos,C. Regali,G. Reicherz,E. Rocco,N. S. Rossiyskaya,D. I. Ryabchikov,A. Rychter,V. D. Samoylenko,A. Sandacz,S. Sarkar,I. A. Savin,G. Sbrizzai,P. Schiavon,C. Schill,T. Schlueter,K. Schmidt,H. Schmieden,K. Schoenning,S. Schopferer,M. Schott,O. Yu. Shevchenko,L. Silva,L. Sinha,S. Sirtl,M. Slunecka,S. Sosio,F. Sozzi,A. Srnka,L. Steiger,M. Stolarski,M. Sulc,R. Sulej,H. Suzuki,A. Szabelski,T. Szameitat,P. Sznajder,S. Takekawa,J. Ter Wolbeek,S. Tessaro,F. Tessarotto,F. Thibaud,S. Uhl,I. Uman,M. Virius,L. Wang,T. Weisrock,M. Wilfert,R. Windmolders,H. Wollny,K. Zaremba,M. Zavertyaev,E. Zemlyanichkina,M. Ziembicki,A. Zink

PHYSICS LETTERS B（2015）

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摘要

A search for the exclusive production of the Z(c)(+/-)(3900) hadron by virtual photons has been performed in the channel Z(c)(+/-)(3900). J/Psi pi(+/-). The data cover the range from 7GeV to 19GeV 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(Z(c)(+/-)(3900)-> J/Psi pi(+/-)) x sigma(gamma N) -> Z(c)(+/-)(3900) N/sigma gamma N -> J/Psi N 3.7 x10(-3) has been established at the confidence level of90%. (C) 2015 The Authors. Published by Elsevier B.V.

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关键词

COMPASS, Z(c)(3900), Photoproduction, Tetraquark

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