Exclusive ω meson muoproduction on transversely polarised protons

Adolph, C.; Aghasyan, M.; Akhunzyanov, R.; Alexeev, M. G.; Alexeev, G. D.; Amoroso, A.; Andrieux, V.; Anfimov, N. V.; Anosov, V.; Augustyniak, W.; Austregesilo, A.; Azevedo, C. D. R.; Badełek, B.; Balestra, F.; Barth, J.; Beck, R.; Bedfer, Y.; Bernhard, J.; Bicker, K.; Bielert, E. R.; Birsa, Renato; Bisplinghoff, J.; Bodlak, M.; Boer, M.; Bordalo, P.; Bradamante, Franco; Braun, C.; Bressan, Andrea; Büchele, M.; Chang, W. C.; Chatterjee, Chandradoy; Chiosso, M.; Choi, I.; Chung, S. U.; Cicuttin, A.; Crespo, M. L.; Curiel, Q.; Dalla Torre, S.; Dasgupta, Shuddha Shankar; Dasgupta, S.; Denisov, O. Y. u.; Dhara, L.; Donskov, S. V.; Doshita, N.; Duic, Venicio; Dünnweber, W.; Dziewiecki, M.; Efremov, A.; Eversheim, P. D.; Eyrich, W.; Faessler, M.; Ferrero, A.; Finger, M.; Finger, M.; Fischer, H.; Franco, C.; du Fresne von Hohenesche, N.; Friedrich, J. M.; Frolov, V.; Fuchey, E.; Gautheron, F.; Gavrichtchouk, O. P.; Gerassimov, S.; Giordano, F.; Gnesi, I.; Gorzellik, M.; Grabmüller, S.; Grasso, A.; Grosse Perdekamp, M.; Grube, B.; Grussenmeyer, T.; Guskov, A.; Haas, F.; Hahne, D.; von Harrach, D.; Hashimoto, R.; Heinsius, F. H.; Heitz, R.; Herrmann, F.; Hinterberger, F.; Horikawa, N.; D'Hose, N.; Hsieh, C. Y.; Huber, S.; Ishimoto, S.; Ivanov, A.; Ivanshin, Y. u.; Iwata, T.; Jahn, R.; Jary, V.; Joosten, R.; Jörg, P.; Kabuß, E.; Ketzer, B.; Khaustov, G. V.; Khokhlov, Y. u. A.; Kisselev, Y. u.; Klein, F.; Klimaszewski, K.; Koivuniemi, J. H.; Kolosov, V. N.; Kondo, K.; Königsmann, K.; Konorov, I.; Konstantinov, V. F.; Kotzinian, A. M.; Kouznetsov, O. M.; Krämer, M.; Kremser, P.; Krinner, F.; Kroumchtein, Z. V.; Kulinich, Y.; Kunne, F.; Kurek, K.; Kurjata, R. P.; Lednev, A. A.; Lehmann, A.; Levillain, M.; Levorato, Stefano; Lian, Y. S.; Lichtenstadt, J.; Longo, R.; Maggiora, A.; Magnon, A.; Makins, N.; Makke, Nour; Mallot, G. K.; Marchand, C.; Marianski, B.; Martin, Anna; Marzec, J.; Matousek, Jan; Matsuda, H.; Matsuda, T.; Meshcheryakov, G. V.; Meyer, M.; Meyer, W.; Michigami, T.; Mikhailov, Y. u. V.; Mikhasenko, M.; Mitrofanov, E.; Mitrofanov, N.; Miyachi, Y.; Montuenga, P.; Nagaytsev, A.; Nerling, F.; Neyret, D.; Nikolaenko, V. I.; Nový, J.; Nowak, W. D.; Nukazuka, G.; Nunes, A. S.; Olshevsky, A. G.; Orlov, I.; Ostrick, M.; Panzieri, D.; Parsamyan, B.; Paul, S.; Peng, J. C.; Pereira, F.; Pešek, M.; Peshekhonov, D. V.; Pierre, N.; Platchkov, S.; Pochodzalla, J.; Polyakov, V. A.; Pretz, J.; Quaresma, M.; Quintans, C.; Ramos, S.; Regali, C.; Reicherz, G.; Riedl, C.; Roskot, M.; Ryabchikov, D. I.; Rybnikov, A.; Rychter, A.; Salac, R.; Samoylenko, V. D.; Sandacz, A.; Santos, C.; Sarkar, S.; Savin, I. A.; Sawada, T.; Sbrizzai, Giulio; Schiavon, Paolo; Schmidt, K.; Schmieden, H.; Schönning, K.; Schopferer, S.; Seder, E.; Selyunin, A.; Shevchenko, O. Y. u.; Silva, L.; Sinha, L.; Sirtl, S.; Slunecka, M.; Smolik, J.; Sozzi, Federica; Srnka, A.; Steffen, D.; Stolarski, M.; Sulc, M.; Suzuki, H.; Szabelski, Adam; Szameitat, T.; Sznajder, P.; Takekawa, Stefano; Tasevsky, M.; Tessaro, Susanna; Tessarotto, F.; Thibaud, F.; Tosello, F.; Tskhay, V.; Uhl, S.; Veloso, J.; Virius, M.; Vondra, J.; Wallner, S.; Weisrock, T.; Wilfert, M.; ter Wolbeek, J.; Zaremba, K.; Zavada, P.; Zavertyaev, M.; Zemlyanichkina, E.; Ziembicki, M.; Zink, A.

doi:10.1016/j.nuclphysb.2016.12.015

Exclusive production of ω 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 in the range of photon virtuality 1 (GeV/c)2<Q2<10 (GeV/c)2, Bjorken scaling variable 0.003<xBj<0.3 and transverse momentum squared of the ω meson View the MathML source. The measured asymmetries are sensitive to the nucleon helicity-flip Generalised Parton Distributions (GPD) E that are related to the orbital angular momentum of quarks, the chiral-odd GPDs HT that are related to the transversity Parton Distribution Functions, and the sign of the πω transition form factor. The results are compared to recent calculations of a GPD-based model.

Titolo:	Exclusive ω meson muoproduction on transversely polarised protons
Autori:	Adolph, C. Aghasyan, M. Akhunzyanov, R. Alexeev, M. G. Alexeev, G. D. Amoroso, A. Andrieux, V. Anfimov, N. V. Anosov, V. Augustyniak, W. Austregesilo, A. Azevedo, C. D. R. Badełek, B. Balestra, F. Barth, J. Beck, R. Bedfer, Y. Bernhard, J. Bicker, K. Bielert, E. R. BIRSA, RENATO Bisplinghoff, J. Bodlak, M. Boer, M. Bordalo, P. BRADAMANTE, FRANCO Braun, C. BRESSAN, Andrea Büchele, M. Chang, W. C. CHATTERJEE, CHANDRADOY Chiosso, M. Choi, I. Chung, S. U. Cicuttin, A. Crespo, M. L. Curiel, Q. DALLA TORRE, SILVIA DASGUPTA, SHUDDHA SHANKAR Dasgupta, S. Denisov, O. Y.u. Dhara, L. Donskov, S. V. Doshita, N. DUIC, VENICIO Dünnweber, W. Dziewiecki, M. Efremov, A. Eversheim, P. D. Eyrich, W. Faessler, M. Ferrero, A. Finger, M. Finger, M. Fischer, H. Franco, C. du Fresne von Hohenesche, N. Friedrich, J. M. Frolov, V. Fuchey, E. Gautheron, F. Gavrichtchouk, O. P. Gerassimov, S. Giordano, F. Gnesi, I. Gorzellik, M. Grabmüller, S. Grasso, A. Grosse Perdekamp, M. Grube, B. Grussenmeyer, T. Guskov, A. Haas, F. Hahne, D. von Harrach, D. Hashimoto, R. Heinsius, F. H. Heitz, R. Herrmann, F. Hinterberger, F. Horikawa, N. D'Hose, N. Hsieh, C. Y. Huber, S. Ishimoto, S. Ivanov, A. Ivanshin, Y.u. Iwata, T. Jahn, R. Jary, V. Joosten, R. Jörg, P. Kabuß, E. Ketzer, B. Khaustov, G. V. Khokhlov, Y.u. A. Kisselev, Y.u. Klein, F. Klimaszewski, K. Koivuniemi, J. H. Kolosov, V. N. Kondo, K. Königsmann, K. Konorov, I. Konstantinov, V. F. Kotzinian, A. M. Kouznetsov, O. M. Krämer, M. Kremser, P. Krinner, F. Kroumchtein, Z. V. Kulinich, Y. Kunne, F. Kurek, K. Kurjata, R. P. Lednev, A. A. Lehmann, A. Levillain, M. LEVORATO, STEFANO Lian, Y. S. Lichtenstadt, J. Longo, R. Maggiora, A. Magnon, A. Makins, N. Makke, Nour Mallot, G. K. Marchand, C. Marianski, B. MARTIN, ANNA Marzec, J. MATOUSEK, JAN Matsuda, H. Matsuda, T. Meshcheryakov, G. V. Meyer, M. Meyer, W. Michigami, T. Mikhailov, Y.u. V. Mikhasenko, M. Mitrofanov, E. Mitrofanov, N. Miyachi, Y. Montuenga, P. Nagaytsev, A. Nerling, F. Neyret, D. Nikolaenko, V. I. Nový, J. Nowak, W. D. Nukazuka, G. Nunes, A. S. Olshevsky, A. G. Orlov, I. Ostrick, M. Panzieri, D. Parsamyan, B. Paul, S. Peng, J. C. Pereira, F. Pešek, M. Peshekhonov, D. V. Pierre, N. Platchkov, S. Pochodzalla, J. Polyakov, V. A. Pretz, J. Quaresma, M. Quintans, C. Ramos, S. Regali, C. Reicherz, G. Riedl, C. Roskot, M. Ryabchikov, D. I. Rybnikov, A. Rychter, A. Salac, R. Samoylenko, V. D. Sandacz, A. Santos, C. Sarkar, S. Savin, I. A. Sawada, T. SBRIZZAI, GIULIO SCHIAVON, PAOLO Schmidt, K. Schmieden, H. Schönning, K. Schopferer, S. Seder, E. Selyunin, A. Shevchenko, O. Y.u. Silva, L. Sinha, L. Sirtl, S. Slunecka, M. Smolik, J. SOZZI, FEDERICA Srnka, A. Steffen, D. Stolarski, M. Sulc, M. Suzuki, H. SZABELSKI, ADAM Szameitat, T. Sznajder, P. TAKEKAWA, STEFANO Tasevsky, M. TESSARO, SUSANNA TESSAROTTO, FULVIO Thibaud, F. Tosello, F. Tskhay, V. Uhl, S. Veloso, J. Virius, M. Vondra, J. Wallner, S. Weisrock, T. Wilfert, M. ter Wolbeek, J. Zaremba, K. Zavada, P. Zavertyaev, M. Zemlyanichkina, E. Ziembicki, M. Zink, A. mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	2017
Stato di pubblicazione:	Pubblicato
Rivista:	NUCLEAR PHYSICS. B
Abstract:	Exclusive production of ω 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 in the range of photon virtuality 1 (GeV/c)2<Q2<10 (GeV/c)2, Bjorken scaling variable 0.003<xBj<0.3 and transverse momentum squared of the ω meson View the MathML source. The measured asymmetries are sensitive to the nucleon helicity-flip Generalised Parton Distributions (GPD) E that are related to the orbital angular momentum of quarks, the chiral-odd GPDs HT that are related to the transversity Parton Distribution Functions, and the sign of the πω transition form factor. The results are compared to recent calculations of a GPD-based model.
Handle:	http://hdl.handle.net/11368/2893735
Digital Object Identifier (DOI):	http://dx.doi.org/10.1016/j.nuclphysb.2016.12.015
URL:	http://www.sciencedirect.com/science/article/pii/S0550321316304138
Appare nelle tipologie:	1.1 Articolo in Rivista

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