1. Transverse target spin asymmetries in exclusive <math altimg='si1.gif' xmlns='http://www.w3.org/1998/Math/MathML'><msup><mrow><mi>ρ</mi></mrow><mrow><mn>0</mn></mrow></msup></math> muoproduction
- Author
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Guthoerl, T., Paul, S., T. Nagel, A.M. Kotzinian, S. Gerassimov, Hohenesche, N. du Fresne von, Olshevsky, A.G.(Joint Institute for Nuclear Research, Moscow Region, Dubna, 141980, Russia), Quintans, C., Silva, L., Finger, M, Elia, C., Bedfer, Y., B. Grube, Quaresma, M., Balestra, F., F. Gautheron, Austregesilo, A., Badellek, B., Wang, L., Kabuss, E., Doshita, N., Matsuda, H.(Yamagata University, Yamagata, 992-8510, Japan), Sirtl, S., Kunne, F., Schlueter, T., Koivuniemi, J. H., S. Takekawa, V.A. Polyakov, Ziembicki, M., Berlin, A., Garfagnini, R.(University of Turin, Department of Physics, Turin, 10125, Italy), Huber, S., Nunes, A.S.(LIP, Lisbon, 1000-149, Portugal), Lednev, A. A., Dasgupta, S., Gavrichtchouk, O. P., Levorato, S.(Trieste Section of INFN, Trieste, 34127, Italy), Kurek, K., Ishimoto, S., Chung, S U., Thibaud, F.(CEA IRFU/SPhN Saclay, Gif-sur-Yvette, 91191, France), Mikhailov, Yu.V.(State Research Center of the Russian Federation, Institute for High Energy Physics, Protvino, 142281, Russia), V. Andrieux, M. Faessler, Crespo, M.L.(Abdus Salam ICTP, Trieste, 34151, Italy), Capozza, L., Guskov, A., Kouznetsov, O., Ramos, S., Platchkov, S.(CEA IRFU/SPhN Saclay, Gif-sur-Yvette, 91191, France), Shevchenko, O. Yu., Dziewiecki, M., Matsuda, T, V.N. Kolosov, K. Klimaszewski, Eyrich, W., Rodionov, V., E. Zemlyanichkina, Ostrick, M., Khokhlov, Yu. A., N.S. Rossiyskaya, Haas, F., Cicuttin, A., P. Jasinski, Efremov, A.(Joint Institute for Nuclear Research, 141980, Moscow region, Dubna, Russia), Ketzer, B., Sozzi, F., Friedrich, J.M., Schmidt, K, J. Bieling, Meyer, W, Filin, A., Kroumchtein, Z. V., Martin, A., Lichtenstadt, J., Ferrero, A., Khaustov, G. V., Fischer, H., Buechele, M., I.A. Savin, Grasso, A., Bressan, A., Slunecka, M., Srnka, A., J. Matousek, Rocco, E., S. Neubert, Sarkar, S., Konstantinov, V. F., Bertini, R., Makke, N., E. Burtin, Schmieden, H., Sandacz, A., Adolph, C., Hinterberger, F., Goertz, S., Vondra, J., Franco, C, A. Amoroso, Alexakhin, V. Yu., F. Nerling, Kisselev, Yu.(Joint Institute for Nuclear Research, Dubna, Moscow Region, 141980, Russia), T. Iwata, Sapozhnikov, M. G., Gnesi, I., Miyachi, Y., Alexandrov, Yu., Duennweber, W., Rondio, E., Kondo, K., Nowak, W.-D., Lehmann, A.(Universität Erlangen–Nürnberg, Physikalisches Institut, Erlangen, 91054, Germany), Kang, D., Frolov, V., Schiavon, P., M. Giorgi, Baum, Günter, Kurjata, R. P., Meshcheryakov, G., Donskov, S. V., Reicherz, G., Joosten, R., Parsamyan, B., Wilfert, M., Neyret, D., M. Vandenbroucke, Boer, M., V.I. Nikolaenko, Marchand, C., Dasgupta, S.S.(Matrivani Institute of Experimental Research & Education, Calcutta-700 030, India 12 12 Supported by SAIL (CSR), Govt. of India.), Michigami, T., Ryabchikov, D.I., Pretz, J., S. Sosio, Suzuki, H, Kraemer, M., M.G. Alekseev, Eversheim, P. D., jr, M. Finger, Hoeppner, Ch., Schott, M, Gushterski, R., Hess, C, Zhuravlev, N., Maggiora, A., Panknin, R., Zaremba, K., Heinsius, F. H., S. Schopferer, Tessaro, S., Wollny, H., K. Schoenning(Uppsala University), Bisplinghoff, J., Sznajder, P., Steiger, L.(Trieste Section of INFN, 34127, Trieste, Italy), A. Morreale, Schmidt, A., Barth, J., Samoylenko, V. D., Konorov, I., Mallot, G. K., Marzec, J., Pesek, M.(Charles University in Prague, Faculty of Mathematics and Physics, Prague, 18000, Czech Republic), Torre, S. Dalla, Virius, M.(Czech Technical University in Prague, Prague, 16636, Czech Republic), P. Bordalo, Bradamante, F., Stolarski, M., Harrach, D. von, M. Sulc, Gobbo, B., Jary, V., Koenigsmann, K., Zavertyaev, M., W. Wislicki, Sinha, L., C. Schill, Panzieri, D.(University of Eastern Piedmont, Alessandria, 15100, Italy), Sulej, R., Grabmueller, S., Jahn, R.(Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, Bonn, 53115, Germany), Polak, J, Pochodzalla, J., Windmolders, R., Ivanshin, Yu., Birsa, R., Bicker, K., Magnon, A.(CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France 17), Tessarotto, F., M. Chiosso, R. Geyer, Alexeev, G.D., Horikawa, N., d'Hose, N., Denisov, O.Yu., Klein, F.(Physikalisches Institut, Universität Bonn, Bonn, 53115, Germany), Braun, C., Piragino, G., Kuchinski, N., S. Uhl, G. Sbrizzai, Schmitt, L, Weisrock, T., F. Herrmann, Wolbeek, J. Ter, Novy, J, Bravar, A.(University of Geneva, Section de Physique, DPNC, Geneva, Switzerland), Nagaytsev, A., Uman, I.(Dogus University, Istanbul, 34722, Turkey), Duic, V., Hahne, D., and J. Bernhard
- Subjects
Physik ,Nuclear and High Energy Physics ,ddc:530 ,Nuclear Experiment ,Particle Physics - Experiment ,High Energy Physics - Experiment - Abstract
Exclusive production of ρ0 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 Q2 , xBj , or pT2 . The sinϕS 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.
- Published
- 2016