학술논문

Exclusive $\omega$ meson muoproduction on transversely polarised protons
Document Type
Working Paper
Author
Adolph, C.Agarwala, J.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.Badelek, B.Balestra, F.Barth, J.Beck, R.Bedfer, Y.Bernhard, J.Bicker, K.Bielert, E. R.Birsa, R.Bisplinghoff, J.Bodlak, M.Boer, M.Bordalo, P.Bradamante, F.Braun, C.Bressan, A.Buechele, M.Chang, W. -C.Chatterjee, C.Chiosso, M.Choi, I.Chung, S. -U.Cicuttin, A.Crespo, M. L.Curiel, Q.Torre, S. DallaDasgupta, S. S.Dasgupta, S.Denisov, O. Yu.Dhara, L.Donskov, S. V.Doshita, N.Duic, V.Duennweber, W.Dziewiecki, M.Efremov, A.Eversheim, P. D.Eyrich, W.Faessler, M.Ferrero, A.Finger, M.Finger jr., M.Fischer, H.Franco, C.von Hohenesche, N. du FresneFriedrich, J. M.Frolov, V.Fuchey, E.Gautheron, F.Gavrichtchouk, O. P.Gerassimov, S.Giordano, F.Gnesi, I.Gorzellik, M.Grabmueller, S.Grasso, A.Perdekamp, M. GrosseGrube, 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.dHose, N.Hsieh, C. -Y.Huber, S.Ishimoto, S.Ivanov, A.Ivanshin, Yu.Iwata, T.Jahn, R.Jary, V.Joosten, R.Joerg, P.Kabuss, E.Ketzer, B.Khaustov, G. V.Khokhlov, Yu. A.Kisselev, Yu.Klein, F.Klimaszewski, K.Koivuniemi, J. H.Kolosov, V. N.Kondo, K.Koenigsmann, K.Konorov, I.Konstantinov, V. F.Kotzinian, A. M.Kouznetsov, O. M.Kraemer, 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, S.Lian, Y. -S.Lichtenstadt, J.Longo, R.Maggiora, A.Magnon, A.Makins, N.Makke, N.Mallot, G. K.Marchand, C.Marianski, B.Martin, A.Marzec, J.Matousek, J.Matsuda, H.Matsuda, T.Meshcheryakov, G. V.Meyer, M.Meyer, W.Michigami, T.Mikhailov, Yu. V.Mikhasenko, M.Mitrofanov, E.Mitrofanov, N.Miyachi, Y.Montuenga, P.Nagaytsev, A.Nerling, F.Neyret, D.Nikolaenko, V. I.Novy, 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.Pesek, 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, G.Schiavon, P.Schmidt, K.Schmieden, H.Schoenning, K.Schopferer, S.Seder, E.Selyunin, A.Shevchenko, O. Yu.Silva, L.Sinha, L.Sirtl, S.Slunecka, M.Smolik, J.Sozzi, F.Srnka, A.Steffen, D.Stolarski, M.Sulc, M.Suzuki, H.Szabelski, A.Szameitat, T.Sznajder, P.Takekawa, S.Tasevsky, M.Tessaro, S.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.
Source
Subject
High Energy Physics - Experiment
Nuclear Experiment
Language
Abstract
Exclusive production of $\omega$ mesons was studied at the COMPASS experiment by scattering $160~\mathrm{GeV}/\mathit{c}$ muons off transversely polarised protons. Five single-spin and three double-spin azimuthal asymmetries were measured in the range of photon virtuality $1~(\mathrm{GeV}/\mathit{c})^2 < Q^2 < 10~(\mathrm{GeV}/\mathit{c})^2$, Bjorken scaling variable $0.003 < x_{\mathit{Bj}} < 0.3$ and transverse momentum squared of the $\omega$ meson $0.05~(\mathrm{GeV}/\mathit{c})^2 < p_{T}^{2} < 0.5~(\mathrm{GeV}/\mathit{c})^2$. 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 $H_{T}$ that are related to the transversity Parton Distribution Functions, and the sign of the $\pi\omega$ transition form factor. The results are compared to recent calculations of a GPD-based model.
Comment: 23 pages, 9 figures