Exclusive rho(0) muoproduction on transversely polarised protons and deuterons

0385194 - ÚPT 2013 RIV NL eng J - Journal Article
Adolph, C. - Alekseev, M. - Alexakhin, V. Yu. - Alexandrov, Yu. - Alexeev, G. D. - Amoroso, A. - Antonov, A. A. - Austregisilio, A. - Badelek, 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. - Büchele, M. - Burtin, E. - Capozza, L. - Chiosso, M. - Chung, S.U. - Cicuttin, A. - Crespo, M. - Dalla Torre, S. - Das, S. - Dasgupta, S. S. - Dasgupta, S. - Denisov, O. - Dhara, L. - Donskov, S. - Doshita, N. - Duic, V. - Dünnweber, W. - Dziewiecki, M. - Efremov, A.V. - Elia, C. - Eversheim, P. - Eyrich, W. - Faessler, M. - Ferrero, A. - Filin, A. - Finger, M. - Finger jr., M. - Fischer, H. - Franco, C. - 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. - Horikawa, N. - Höppner, Ch. - d'Hose, N. - Ishimoto, S. - Ivanov, O. - Ivanshin, Yu. - Iwata, T. - Jahn, R. - Jary, V. - Jasinski, P. - Jegou, G. - 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. - Königsmann, K. - Konorov, I. - Konstantinov, V. - Korzenev, A. - Kotzinian, A. - Kouznetsov, O. - Krämer, M. - Kroumchtein, Z. - Kunne, F. - Kurek, K. - Lauser, L. - Lednev, A. - Lehmann, A. - Levorato, S. - Lichtenstadt, J. - Liska, T. - Maggiora, A. - Magnon, A. - Makke, N. - Mallot, G. - Mann, A. - Marchand, C. - Martin, A. - Marzec, J. - Matsuda, T. - Meshcheryakov, G. - Meyer, W. - Michigami, T. - Mikhailov, Y. - Moinester, M. - Morreale, A. - Mutter, A. - Nagaytsev, A. - Nagel, T. - Negrini, S. - Nerling, F. - Neubert, S. - Neyret, D. - Nikolaenko, V. - Nowak, W. D. - Nunes, A.S. - Olshevsky, A. - Ostrick, M. - Padee, A. - Panknin, R. - Panzieri, D. - Parsamyan, B. - Paul, S. - Perevalova, E. - Pesaro, G. - Peshekhonov, D. - Piragino, G. - Platchkov, S. - Pochodzalla, J. - Polak, J. - Polyakov, V. - Pretz, J. - Quaresma, M. - Quintans, C. - Rajotte, J. - Ramos, S. - Rapatsky, V. - Reicherz, G. - Richter, A. - Rocco, E. - Rondio, E. - Rossiyskaya, N. S. - Ryabchikov, D. - Samoylenko, V. - Sandacz, A. - Sapozhnikov, M. - Sarkar, S. - Savin, I. - Sbrizzai, G. - Schiavon, P. - Schill, C. - Schlütter, T. - Schmidt, K. - Schmitt, L. - Schönning, K. - Schopferer, S. - Schott, M. - Schröder, W. - Shevchenko, O. - Silva, L. - Sinha, L. - Sissakian, A. - Slunecka, M. - Smirnov, G. - Sosio, S. - Sozzi, F. - Srnka, Aleš - Steiger, L. - Stolarski, M. - Sulc, M. - Sulej, R. - Suzuki, H. - Sznajder, P. - Takekawa, S. - Ter Wolbeek, J. - Tessaro, S. - Tessarotto, F. - Tkatchev, L. - Uhl, S. - Uman, I. - Vandenbroucke, M. - Virius, M. - Vlassov, N. - Wang, L. - Wilfert, M. - Windmolders, R. - Wislicki, W. - Wollny, H. - Zaremba, K. - Zavertyaev, M. - Zemlyanichkina, E. - Ziembicki, M. - Zhuravlev, N. - Zvyagin, A.
Exclusive rho(0) muoproduction on transversely polarised protons and deuterons.
Nuclear Physics. B. Roč. 865, č. 1 (2012), s. 1-20. ISSN 0550-3213. E-ISSN 1873-1562
Institutional support: RVO:68081731
Keywords : vector-meson electroproduction * generalized parton distributions * virtual compton-scattering
Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders
Impact factor: 4.327, year: 2012

The transverse target spin azimuthal asymmetry A(UT)(sin(phi-phi s)) in hard exclusive production of rho(0) 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 E-q, which are related to the orbital angular momentum of quarks in the nucleon. The Q(2), x-B-j and p(T)(2) dependence of A(UT)(sin(phi-phi s)) is presented in a wide kinematic range: 1 (GeV/c)(2) < Q(2) < 10 (GeV/c)(2), 0.003 < xB(j) < 0.3 and 0.05 (GeV/c)(2) < p(T)(2) < 0.5 (GeV/c)(2) for protons or 0.10 (GeV/c)(2) < p(T)(2) < 0.5 (GeV/c)(2) for deuterons. Results for deuterons are obtained for the first time. The measured asymmetry is small in the whole kinematic range for both protons and deuterons, which is consistent with the theoretical interpretation that contributions from GPDs E-u and E-d approximately cancel.
Permanent Link: http://hdl.handle.net/11104/0214528