학술논문

Collins and Sivers transverse-spin asymmetries in inclusive muoproduction of $\rho^0$ mesons
Document Type
Working Paper
Author
Alexeev, G. D.Alexeev, M. G.Alice, C.Amoroso, A.Andrieux, V.Anosov, V.Augsten, K.Augustyniak, W.Azevedo, C. D. R.Badelek, B.Barth, J.Beck, R.Bedfer, Y.Bernhard, J.Bodlak, M.Bradamante, F.Bressan, A.Burtsev, V. E.Chang, W. -C.Chatterjee, C.Chiosso, M.Chumakov, A. G.Chung, S. -U.Cicuttin, A.Correia, P. M. M.Crespo, M. L.D'Ago, D.Torre, S. DallaDasgupta, S. S.Dasgupta, S.Del Carro, F.Denisenko, I.Denisov, O. Yu.Donskov, S. V.Doshita, N.Dreisbach, Ch.Dünnweber, W.Dusaev, R. R.Ecker, D.Efremov, A.Elia, C.Eremeev, D.Faccioli, P.Faessler, M.Finger, M.Finger jr., M.Fischer, H.Flöthner, K. J.Florian, W.Friedrich, J. M.Frolov, V.Ordòñez, L. G. GarciaGautheron, F.Gavrichtchouk, O. P.Gerassimov, S.Giarra, J.Giordano, D.Gorzellik, M.Grasso, A.Gridin, A.Perdekamp, M. GrosseGrube, B.Grüner, M.Guskov, A.von Harrach, D.Hoffmann, M.Horikawa, N.d'Hose, N.Hsieh, C. -Y.Huber, S.Ishimoto, S.Ivanov, A.Iwata, T.Jandek, M.Jary, V.Joosten, R.Kabuß, E.Kaspar, F.Kerbizi, A.Ketzer, B.Khatun, A.Khaustov, G. V.Klein, F.Koivuniemi, J. H.Kolosov, V. N.Horikawa, K. KondoKonorov, I.Konstantinov, V. F.Korzenev, A. M.Kotzinian, A. M.Kouznetsov, O. M.Koval, A.Kral, Z.Krinner, F.Kunne, F.Kurek, K.Kurjata, R. P.Kveton, A.Lavickova, K.Levorato, S.Lian, Y. -S.Lichtenstadt, J.Lin, P. -J.Longo, R.Lyubovitskij, V. E.Maggiora, A.Magnon, A.Makins, N.Makke, N.Mallot, G. K.Maltsev, A.Mamon, S. A.Martin, A.Marzec, J.Matoušek, J.Matsuda, T.Mattson, G.Pires, C. MenezesMetzger, F.Meyer, M.Meyer, W.Mikhailov, Yu. V.Mikhasenko, M.Mitrofanov, E.Miura, D.Miyachi, Y.Molina, R.Moretti, A.Nagaytsev, A.Naim, C.Neyret, D.Nový, J.Nowak, W. -D.Nukazuka, G.Olshevsky, A. G.Ostrick, M.Panzieri, D.Parsamyan, B.Paul, S.Pekeler, H.Peng, J. -C.Pešek, M.Peshekhonov, D. V.Pešková, M.Platchkov, S.Pochodzalla, J.Polyakov, V. A.Quaresma, M.Quintans, C.Reicherz, G.Riedl, C.Rudnicki, T.Ryabchikov, D. I.Rychter, A.Rymbekova, A.Samoylenko, V. D.Sandacz, A.Sarkar, S.Savin, I. A.Sbrizzai, G.Schmieden, H.Selyunin, A.Sharko, K.Sinha, L.Slunecka, M.Sozzi, F.Spülbeck, D.Srnka, A.Stolarski, M.Subrt, O.Sulc, M.Suzuki, H.Tessaro, S.Tessarotto, F.Thiel, A.Tomsa, J.Tosello, F.Townsend, A.Triloki, T.Tskhay, V.Valinoti, B.Veit, B. M.Veloso, J. F. C. A.Ventura, B.Virius, M.Wagner, M.Wallner, S.Zaremba, K.Zavertyaev, M.Zemko, M.Zemlyanichkina, E.Ziembicki, M.
Source
Subject
High Energy Physics - Experiment
High Energy Physics - Phenomenology
Language
Abstract
The production of vector mesons in deep inelastic scattering is an interesting yet scarsely explored channel to study the transverse spin structure of the nucleon and the related phenomena. The COMPASS collaboration has performed the first measurement of the Collins and Sivers asymmetries for inclusively produced $\rho^0$ mesons. The analysis is based on the data set collected in deep inelastic scattering in $2010$ using a $160\,\,\rm{GeV}/c$ $\mu^+$ beam impinging on a transversely polarized $\rm{NH}_3$ target. The $\rho^{0}$ mesons are selected from oppositely charged hadron pairs, and the asymmetries are extracted as a function of the Bjorken-$x$ variable, the transverse momentum of the pair and the fraction of the energy $z$ carried by the pair. Indications for positive Collins and Sivers asymmetries are observed.