Data di Pubblicazione:
2014
Abstract:
Exclusive production of rho(0) mesons was studied at the COMPASS experiment by scattering 160 GeV/c muons off transversely polarised protons. Five single-spin and three double-spin azimuthal asymmetries were measured as a function of Q(2), x(Bj), or p(T)(2). The sin Os asymmetry is found to be -0.019 +/- 0.008(stat.) +/- 0.003(syst.). All other asymmetries are also found to be of small magnitude and consistent with zero within experimental uncertainties. Very recent calculations using a GPD-based model agree well with the present results. The data is interpreted as evidence for the existence of chiral-odd, transverse generalized parton distributions. (C) 2014 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org!licenses/by/3.0/).
Tipologia CRIS:
03A-Articolo su Rivista
Keywords:
GENERALIZED PARTON DISTRIBUTIONS; VECTOR-MESON ELECTROPRODUCTION; SCATTERING; QCD
Elenco autori:
C. Adolph; R. Akhunzyanov; M.G. Alekseev; V.Y. Alexakhin; Yu. Alexandrov; G.D. Alexeev; A. Amoroso; V. Andrieux; V. Anosov; A. Austregesilo; B. Badełek; F. Balestra; J. Barth; G. Baum; R. Beck; Y. Bedfer; A. Berlin; J. Bernhard; R. Bertini; K. Bicker; J. Bieling; R. Birsa; J. Bisplinghoff; M. Bodlak; M. Boer; P. Bordalo; F. Bradamante; C. Braun; A. Bravar; A. Bressan; M. Büchele; 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. Dünnweber; M. Dziewiecki; A. Efremov; C. Eliay; 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; R. Garfagnini; F. Gautheron; O.P. Gavrichtchouk; S. Gerassimov; R. Geyer; M. Giorgi; I. Gnesi; B. Gobbo; S. Goertz; M. Gorzellik; S. Grabmüller; A. Grasso; B. Grube; R. Gushterski; A. Guskov; T. Guthörl; F. Haas; D. von Harrach; D. Hahne; R. Hashimoto; F.H. Heinsius; F. Herrmann; F. Hinterberger; Ch. Höppner; 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; D. Kang; B. Ketzer; G.V. Khaustov; Yu.A. Khokhlov; Yu. Kisselev; F. Klein; K. Klimaszewski; J.H. Koivuniemi; V.N. Kolosov; K. Kondo; K. Königsmann; I. Konorov; V.F. Konstantinov; A.M. Kotzinian; O. Kouznetsov; Z. Kral; M. Krämer; Z.V. Kroumchtein; N. Kuchinski; F. Kunne; K. Kurek; R.P. Kurjata; A.A. Lednev; A. Lehmann; 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; I. Orlov; A.G. Olshevsky; M. Ostrick; R. Panknin; D. Panzieri; B. Parsamyan; S. Paul; M. Pesek; D. Peshekhonov; G. Piragino; S. Platchkov; J. Pochodzalla; J. Polak; V.A. Polyakov; J. Pretz; M. Quaresma; C. Quintans; S. Ramos; G. Reicherz; E. Rocco; V. Rodionov; E. Rondio; N.S. Rossiyskaya; D.I. Ryabchikov; V.D. Samoylenko; A. Sandacz; M.G. Sapozhnikov; S. Sarkar; I.A. Savin; G. Sbrizzai; P. Schiavon; C. Schill; T. Schlüter; A. Schmidt; K. Schmidt; L. Schmitt; H. Schmieden; K. Schönning; 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. Vandenbroucke; M. Virius; J. Vondra; L. Wang; T. Weisrock; M. Wilfert; R. Windmolders; W. Wiślicki; H. Wollny; K. Zaremba; M. Zavertyaev; E. Zemlyanichkina; N. Zhuravlev; M. Ziembicki;
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