Double spin asymmetry in exclusive ρ0 muoproduction at COMPASS

• Published in: The European physical journal. C, Particles and fields Particles and fields, 2007-10, Vol.52 (2), p.255-265
• Main Authors: Alexakhin, VYu, Alexandrov, Yu, Bernet, C, Bettinelli, M, Bordalo, P, Bravar, A, Brona, G, Burtin, E, Chiosso, M, Crespo, M L, Das, S, De Masi, R, Dedek, N, Diaz, V, Dinkelbach, A M, Dünnweber, W, Eversheim, P D, Fabro, M, Ferrero, L, Finger, M, Franz, J, Frolov, V, Gazda, R, Gerassimov, S, Geyer, R, Gorin, A M, Grabmüller, S, Grasso, A, Grube, B, Gushterski, R, Guskov, A, Haas, F, Hannappel, J, D von Harrach, Hasegawa, T, Heckmann, J, Ilgner, C, Ivanov, O, Iwata, T, NI Jouravlev, Kabuß, E, Khaustov, G V, Khokhlov, YuA, Klimaszewski, K, Koivuniemi, J H, Kondo, K, Konstantinov, V F, Korentchenko, A S, Koutchinski, NA, Kravchuk, N P, Kroumchtein, Z V, Kunne, F, Kurek, K, JM Le Goff, Liska, T, Ludwig, I, Maggiora, M, Mallot, G K, Marchand, C, Marroncle, J, Marzec, J, Matsuda, T, Meyer, W, Mielech, A, Nagaytsev, A, Nagel, T, Neliba, S, Neubert, S, Neyret, D P, Nikolaev, K, Pagano, P, Panebianco, S, Panknin, R, Pawlukiewicz-Kaminska, B, Peshekhonov, D V, Pretz, J, Procureur, S, Ramos, S, Reicherz, G, Rondio, E, Ryabchikov, DI, Sandacz, A, Santos, H, Sapozhnikov, M G, Savin, IA, Schröder, W, Shevchenko, OYu, AN Sissakian, Slunecka, M, Sugonyaev, V P, Sulc, M, Sulej, R, Teufel, A, Virius, M, Vlassov, N V, Vossen, A, Wiślicki, W, Zaremba, K, Zemlyanichkina, E
• Format: Article
• Language: English
• Subjects: Asymmetry; Dependence; Deuterons; Longitude; Mesons; Particle production
• ISSN: 1434-6044; 1434-6052
• DOI: 10.1140/epjc/s10052-007-0376-6

The longitudinal double spin asymmetry A1ρ for exclusive leptoproduction of ρ0 mesons, μ+N→μ+N+ρ, is studied using the COMPASS 2002 and 2003 data. The measured reaction is incoherent exclusive ρ0 production on polarised deuterons. The Q2 and x dependence of A1ρ is presented in a wide kinematical range, 3×10-3