Collins and Sivers transverse-spin asymmetries in inclusive muoproduction of ρ0 mesons

G. D. Alexeev, M. Alexeev, C. Alice, A. Amoroso, V. Andrieux, В. Аносов, K. Augsten, W. Augustyniak, C.D.R. Azevedo,B. Badełek, J. Barth, R. Beck, Y. Bedfer, J. Bernhard, M. Bodlak, F. Bradamante, A. Bressan, V.E. Burtsev,W. C. Chang,C. Chatterjee, M. Chiosso, A.G. Chumakov, S. U. Chung, A. Cicuttin, P.M.M. Correia, M.L. Crespo, D. D’Ago,S. Dalla Torre, S. Dasgupta, S. Dasgupta,Filippo Delcarro, I. Denisenko, О. Денисов, S.V. Donskov, N. Doshita,Ch. Dreisbach, W. Dünnweber,R. R. Dusaev, D. Ecker,А. В. Ефремов, C. Elia, D. Eremeev, P. Faccioli, M. Faessler,M. Finger,М. Фингер,H. Fischer, K.J. Flöthner, Werner Florian Samayoa, Friedrich Jm,V. V. Frolov, Luis G. Ordóñez, F. Gautheron,O.P. Gavrichtchouk, S. Gerassimov, J. Giarra, D. Giordano, M. Gorzellik, A. Grasso, A. Gridin,M. Grosse Perdekamp, B. Grube, M. Grüner, A. Guskov,D. von Harrach, M. Hoffmann,N. Horikawa, N. d’Hose, C.-Y. Hsieh,S. Huber,S. Ishimoto,А. Иванов, Tadahisa Iwata, M. Jandek, V. Jary, R. Joosten, E. Kabuß, F. Kašpar, A. Kerbizi,B. Ketzer, A. Khatun, G.V. Khaustov, Ф. Клейн, J. H. Koivuniemi,V.N. Kolosov,K. Kondo Horikawa, I. Konorov, В.Ф. Константинов, A. Korzenev, A.M. Kotzinian,O. Kouznetsov, A. Koval, Zdeněk Král, F. Krinner,F. Kunne, K. Kurek, R. Kurjata, A. Kveton, K. Lavičková, S. Levorato, Y.-S. Lian, J. Lichtenstadt, P.-J. Lin, Riccardo Longo, Valery E. Lyubovitskij, A. Maggiora, A. Magnon, N. Makins, N. Makke, G.K. Mallot, A. Maltsev, S.A. Mamon, A. Martin, J. Marzec, Jan Matoušek, T. Matsuda, G. Mattson, C. Menezes Pires, F.R. Metzger, Martin M. Meyer, W. Meyer,Yu.V. Mikhailov, M. Mikhasenko, E. Mitrofanov, Daisuke Miura, Y. Miyachi, Romina Molina, A. Moretti, A. Nagaytsev, C. Naim, D. Neyret, J. Nový, W.-D. Nowak, G. Nukazuka, A.G. Olshevsky, M. Ostrick, D. Panzieri, B. Parsamyan, S. Paul, H. Pekeler, J. C. Peng, M. Pešek, D.V. Peshekhonov, M. Pešková, S. Platchkov, J. Pochodzalla, V.A. Polyakov, M. Quaresma, C. Quintans, G. Reicherz, C. Riedl, T. Rudnicki, D. I. Ryabchikov, A. Rychter, A. Rymbekova, V.D. Samoylenko, A. Sandacz, S. Sarkar, I. Savin, G. Sbrizzai, H. Schmieden, A. Selyunin, K. Sharko, L. Sinha, M. Slunečka, F. Sozzi, D. Spülbeck, A. Srnka, M. Stolarski, O. Subrt, M. Šulc, Hayato Suzuki, S. Tessaro, F. Tessarotto, A. Thiel, J. Tomsa, F. Tosello, A. Townsend, Triloki Pandit, V. Tskhay, Bruno Valinoti, B.M. Veit, J.F.C.A. Veloso, Bartolomeo Della Ventura, M. Virius, Mathias Wagner, S. Wallner, К. Заремба, M. Zavertyaev, M. Zemko, E. Zemlyanichkina, M. Ziembicki

Physics Letters B(2023)

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摘要
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.
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关键词
ρ0 mesons,inclusive muoproduction,transverse-spin
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