Exclusive rho^0 muoproduction on transversely polarised protons and deuterons

C Adolph,M G Alekseev,V Yu Alexakhin,Yu A Alexandrov,G D Alexeev,A Amoroso,A Antonov,A Austregesilo,B Badelek,F Balestra,J E Barth,Gunter Baum,Y Bedfer,J C Bernhard,R Bertini, M Bettinelli, K Bicker, J Bieling,R Birsa,J Bisplinghoff,P Bordalo,F Bradamante,C Braun,A Bravar,A Bressan, M Buechele,E Burtin,L Capozza,M Chiosso,S U Chung,A Cicuttin,M L Crespo,S Dalla Torre,Swadesh K Das,S S Dasgupta,O Yu Denisov,L Dhara,S V Donskov,N Doshita,V Duic, W Duennweber,M Dziewiecki,A Efremov,C Elia,P D Eversheim,W Eyrich,M A Faessler,A M Ferrero,A P Filin,M Finger,H M Fischer,Carlos Jaime Velasquez Franco,N Du Fresne Von Hohenesche,J M Friedrich,V V Frolov,R Garfagnini,F Gautheron,O P Gavrichtchouk,S G Gerassimov,R Geyer,M A Giorgi,I Gnesi,B Gobbo,S Goertz,S Grabmueller,A Grasso,B Grube,R Gushterski,A Guskov, T Guthoerl,F Haas,D Von Harrach,F H Heinsius,F H Herrmann,Clemens Friedrich Hess,F Hinterberger,N Horikawa,Ch Hoeppner,N Dhose,S Ishimoto,O Ivanov,Yu I Ivanshin,T Iwata,R Jahn,V Jary,P Jasinski,G Jegou,R Joosten,E M Kabuss,D Kang,B Ketzer,G V Khaustov,Yu A Khokhlov,Yu Kisselev, F J Klein,K Klimaszewski,S Koblitz,J H Koivuniemi,V N Kolosov,K Kondo, K Koenigsmann,I Konorov,V F Konstantinov,A Korzenev,A M Kotzinian,O Kouznetsov,M Kraemer,Z V Kroumchtein,F Kunne,K Kurek,L Lauser,A A Lednev,A Lehmann,S Levorato,J Lichtenstadt,T Liska, A Maggiora,A Magnon,N Makke,G K Mallot,A Mann,C Marchand,A Martin,J Marzec,T Matsuda, G Meshcheryakov, W T Meyer,T Michigami,Yu V Mikhailov,M A Moinester, A Morreale,A Mutter,A Nagaytsev,T Nagel,T Negrini,F Nerling,S Neubert,D Neyret, V Nikolaenko, Wolfdieter Nowak,A S Nunes,A G Olshevsky,M Ostrick,A Padee,R Panknin,D Panzieri,B Parsamyan,S Paul,E Perevalova,G Pesaro,D V Peshekhonov,G Piragino,S Platchkov, J Pochodzalla, J H Polak,V A Polyakov,J Pretz,M Quaresma,C Quintans, J F Rajotte,S Ramos,V Rapatsky,G Reicherz,A Richter,E Rocco,E Rondio,N S Rossiyskaya,D I Ryabchikov,V D Samoylenko,A Sandacz,M G Sapozhnikov,S Sarkar,I Savin,G Sbrizzai,P Schiavon,C Schill,T Schlueter,K H Schmidt,L Schmitt,K Schoenning,S Schopferer,Matthias Schott,W A Schroeder,O Yu Shevchenko,L Silva,L Sinha,A N Sissakian,M Slunecka,G I Smirnov,S Sosio,F Sozzi,A Srnka,L Steiger,M Stolarski,M Sulc,R Sulej, Hidenori Suzuki, P Sznajder,S Takekawa,J Ter Wolbeek,S Tessaro,F Tessarotto,L G Tkatchev,S Uhl,I Uman,M Vandenbroucke,M Virius, N V Vlassov, L Wang, M Wilfert,R Windmolders,W Wislicki,H Wollny,K Zaremba,M Zavertyaev,E Zemlyanichkina,M Ziembicki,N Zhuravlev,A Zvyagin

Nuclear Physics B（2012）

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摘要

The transverse target spin azimuthal asymmetry AUTsin(ϕ−ϕS) in hard exclusive production of ρ0 mesons was measured at COMPASS by scattering 160 GeV/c muons off transversely polarised protons and deuterons. The measured asymmetry is sensitive to the nucleon helicity-flip generalised parton distributions Eq, which are related to the orbital angular momentum of quarks in the nucleon. The Q2, xBj and pT2 dependence of AUTsin(ϕ−ϕS) is presented in a wide kinematic range: 1(GeV/c)2更多

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关键词

deuterons,protons,muoproduction

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