Double spin asymmetry in exclusive $\rho^0$ muoproduction at COMPASS

The longitudinal double spin asymmetry A_1^rho for exclusive leptoproduction of rho^0 mesons, mu + N -> mu + N + rho, is studied using the COMPASS 2002 and 2003 data. The measured reaction is incoherent exclusive rho^0 production on polarised deuterons. The Q^2 and x dependence of A_1^rho is pres...

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Detalles Bibliográficos
Autores principales: Alexakhin, V.Yu., Alexandrov, Yu., Alexeev, G.D., Amoroso, A., Badelek, B., Balestra, F., Ball, J., Baum, G., Bedfer, Y., Bernet, C., Bertini, R., Birsa, R., Bisplinghoff, J., Bordalo, P., Bradamante, F., Bravar, A., Bressan, A., Brona, G., Burtin, E., Bussa, M.P., Chapiro, A., Cicuttin, A., Costa, S., Crespo, M.L., d'Hose, N., Dalla Torre, S., Dasgupta, S.S., De Masi, R., Dedek, N., Dhara, L., Diaz Kavka, V., Dinkelbach, A.M., Donskov, S.V., Dorofeev, V.A., Doshita, N., Duic, V., Dunnweber, W., Eversheim, P.D., Eyrich, W., Fabro, M., Faessler, M., Falaleev, V., Ferrero, A., Ferrero, L., Finger, M., Finger, M., Jr., Fischer, H., Franz, J., Friedrich, J.M., Garfagnini, R., Gautheron, F., Gavrichtchouk, O.P., Geyer, R., Giorgi, M., Gobbo, B., Gorin, A.M., Grajek, O.A., Grasso, A., Grube, B., Hannappel, J., von Harrach, D., Hasegawa, T., Heckmann, J., Hedicke, S., Heinsius, F.H., Hermann, R., Hess, C., Hinterberger, F., von Hodenberg, M., Horikawa, S., Ilgner, C., Ioukaev, A.I., Ishimoto, S., Ivanov, O., Jahn, R., Janata, A., Joosten, R., Jouravlev, N.I., Kabuss, E., Kang, D., Ketzer, B., Khaustov, G.V., Khokhlov, Yu.A., Khomutov, N.V., Klein, F., Koblitz, S., Koivuniemi, J.H., Kolosov, V.N., Komissarov, E.V., Kondo, K., Konigsmann, Kay, Konstantinov, V.F., Korentchenko, A.S., Korzenev, Alexandre, Koutchinski, N.A., Kravchuk, N.P., Kroumchtein, Z.V., Kuhn, R., Kunne, F., Kurek, K., Ladygin, M.E., Le Goff, J.M., Lichtenstadt, J., Liska, T., Ludwig, I., Maggiora, A., Maggiora, M., Magnon, A., Mallot, G.K., Marchand, C., Marroncle, J., Martin, A., Marzec, J., Matsuda, T., Maximov, A.N., Meyer, W., Mikhailov, Yu.V., Moinester, M.A., Nahle, O., Nassalski, J., Neliba, S., Neyret, D.P., Nikolaenko, V.I., Nozdrin, A.A., Obraztsov, V.F., Olshevsky, A.G., Ostrick, M., Padee, A., Pagano, P., Panebianco, S., Paul, S., Peshekhonov, D.V., Peshekhonov, V.D., Piragino, G., Platchkov, S., Pochodzalla, J., Polyakov, V.A., Popov, A.A., Pretz, J., Procureur, S., Quintans, C., Ramos, S., Reicherz, G., Rozhdestvensky, A.M., Rondio, E., Sadovski, A.B., Samoylenko, V.D., Sandacz, A., Sapozhnikov, M.G., Savin, Igor A., Schiavon, P., Schill, C., Schmitt, L., Shevchenko, O.Yu., Shishkin, A.A., Sinha, L., Sissakian, A.N., Slunecka, M., Smirnov, G.I., Sozzi, F., Sugonyaev, V.P., Srnka, A., Stinzing, F., Stolarski, M., Sulc, M., Sulej, R., Takabayashi, N., Tchalishev, V.V., Tessarotto, F., Teufel, A., Tkatchev, L.G., Virius, M., Vlassov, N.V., Webb, R., Weise, E., Weitzel, Q., Windmolders, R., Wirth, S., Wislicki, W., Zaremba, K., Zemlyanichkina, E., Zhao, J., Ziegler, R., Zvyagin, A.
Lenguaje:eng
Publicado: 2007
Materias:
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1140/epjc/s10052-007-0376-6
http://cds.cern.ch/record/1030207
Descripción
Sumario:The longitudinal double spin asymmetry A_1^rho for exclusive leptoproduction of rho^0 mesons, mu + N -> mu + N + rho, is studied using the COMPASS 2002 and 2003 data. The measured reaction is incoherent exclusive rho^0 production on polarised deuterons. The Q^2 and x dependence of A_1^rho is presented in a wide kinematical range: 3x10^-3 < Q^2 < 7 (GeV/c)^2 and 5x10^-5 < x < 0.05. The presented results are the first measurements of A_1^rho at small Q2 (Q2 < 0.1 (GeV/c)^2) and small x (x < 3x10^-3). The asymmetry is in general compatible with zero in the whole kinematical range.

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