Exclusive rho^0 muoproduction on transversely polarised protons and deuterons
High Energy Physics - Experiment
2015-06-05 v2
Abstract
The transverse target spin azimuthal asymmetry A_UT 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 and p_t^2 dependence of A_UT is presented in a wide kinematic range. 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.
Keywords
Cite
@article{arxiv.1207.4301,
title = {Exclusive rho^0 muoproduction on transversely polarised protons and deuterons},
author = {C. Adolph and M. G. Alekseev and V. Yu. Alexakhin and Yu. Alexandrov and G. D. Alexeev and A. Amoroso and A. A. Antonov and A. Austregesilo and B. Badełek and F. Balestra and J. Barth and G. Baum and Y. Bedfer and J. Bernhard and R. Bertini and M. Bettinelli and K. Bicker and J. Bieling and R. Birsa and J. Bisplinghoff and P. Bordalo and F. Bradamante and C. Braun and A. Bravar and A. Bressan and M. Büchele and E. Burtin and L. Capozza and M. Chiosso and S. U. Chung and A. Cicuttin and M. L. Crespo and S. Dalla Torre and S. Das and S. S. Dasgupta and S. Dasgupta and O. Yu. Denisov and L. Dhara and S. V. Donskov and N. Doshita and V. Duic and W. Dünnweber and M. Dziewiecki and A. Efremov and C. Elia and P. D. Eversheim and W. Eyrich and M. Faessler and A. Ferrero and A. Filin and M. Finger and M. Finger and H. Fischer and C. Franco and N. du Fresne von Hohenesche and J. M. Friedrich and V. Frolov and R. Garfagnini and F. Gautheron and O. P. Gavrichtchouk and S. Gerassimov and R. Geyer and M. Giorgi and I. Gnesi and B. Gobbo and S. Goertz and S. Grabmüller and A. Grasso and B. Grube and R. Gushterski and A. Guskov and T. Guthörl and F. Haas and D. von Harrach and F. H. Heinsius and F. Herrmann and C. Heß and F. Hinterberger and N. Horikawa and Ch. Höppner and N. d'Hose and S. Ishimoto and O. Ivanov and Yu. Ivanshin and T. Iwata and R. Jahn and V. Jary and P. Jasinski and G. Jegou and R. Joosten and E. Kabuß and D. Kang and B. Ketzer and G. V. Khaustov and Yu. A. Khokhlov and Yu. Kisselev and F. Klein and K. Klimaszewski and S. Koblitz and J. H. Koivuniemi and V. N. Kolosov and K. Kondo and K. Königsmann and I. Konorov and V. F. Konstantinov and A. Korzenev and A. M. Kotzinian and O. Kouznetsov and M. Krämer and Z. V. Kroumchtein and F. Kunne and K. Kurek and L. Lauser and A. A. Lednev and A. Lehmann and S. Levorato and J. Lichtenstadt and T. Liska and A. Maggiora and A. Magnon and N. Makke and G. K. Mallot and A. Mann and C. Marchand and A. Martin and J. Marzec and T. Matsuda and G. Meshcheryakov and W. Meyer and T. Michigami and Yu. V. Mikhailov and M. A. Moinester and A. Morreale and A. Mutter and A. Nagaytsev and T. Nagel and T. Negrini and F. Nerling and S. Neubert and D. Neyret and V. I. Nikolaenko and W. -D. Nowak and A. S. Nunes and A. G. Olshevsky and M. Ostrick and A. Padee and R. Panknin and D. Panzieri and B. Parsamyan and S. Paul and E. Perevalova and G. Pesaro and D. V. Peshekhonov and G. Piragino and S. Platchkov and J. Pochodzalla and J. Polak and V. A. Polyakov and J. Pretz and M. Quaresma and C. Quintans and J. -F. Rajotte and S. Ramos and V. Rapatsky and G. Reicherz and A. Richter and E. Rocco and E. Rondio and N. S. Rossiyskaya and D. I. Ryabchikov and V. D. Samoylenko and A. Sandacz and M. G. Sapozhnikov and S. Sarkar and I. A. Savin and G. Sbrizzai and P. Schiavon and C. Schill and T. Schlüter and K. Schmidt and L. Schmitt and K. Schönning and S. Schopferer and M. Schott and W. Schröder and O. Yu. Shevchenko and L. Silva and L. Sinha and A. N. Sissakian and M. Slunecka and G. I. Smirnov and S. Sosio and F. Sozzi and A. Srnka and L. Steiger and M. Stolarski and M. Sulc and R. Sulej and H. Suzuki and P. Sznajder and S. Takekawa and J. Ter Wolbeek and S. Tessaro and F. Tessarotto and L. G. Tkatchev and S. Uhl and I. Uman and M. Vandenbroucke and M. Virius and N. V. Vlassov and L. Wang and M. Wilfert and R. Windmolders and W. Wiślicki and H. Wollny and K. Zaremba and M. Zavertyaev and E. Zemlyanichkina and M. Ziembicki and N. Zhuravlev and A. Zvyagin},
journal= {arXiv preprint arXiv:1207.4301},
year = {2015}
}
Comments
20 pages, 9 figures and 4 tables, updated author list