Accès ouvert déclaré
2023
preprint
High-statistics measurement of Collins and Sivers asymmetries for transversely polarised deuterons
G. D. Alexeev, M. Alexeev, C. Alice, A. Amoroso, V. Andrieux, V. Anosov, Sona Asatryan, K. Augsten, W. Augustyniak, C.D.R. Azevedo, B. Badełek, J. Barth, R. Beck, J. Beckers, Y. Bedfer, J. Bernhard, M. Bodlak, F. Bradamante, A. Bressan, W. C. Chang, C. Chatterjee, M. Chiosso, А. Г. Чумаков, S. -U. Chung, A. Cicuttin, P. M. M. Correia, M.L. Crespo, D. D’Ago, S. Dalla Torre, S. Dasgupta, Filippo Delcarro, I. Denisenko, О. Денисов, S.V. Donskov, N. Doshita, Ch. Dreisbach, W. Dünnweber, R. R. Dusaev, D. Ecker, D. Eremeev, P. Faccioli, M. Faessler, M. Finger, H. Fischer, K.J. Flöthner, W. Florian, V. Frolov, L. G. Garcia Ordonez, F. Gautheron, O.P. Gavrichtchouk, S. Gerassimov, J. Giarra, D. Giordano, A. Gridin, M. Große Perdekamp, B. Grube, Markus E. Gruner, A. Guskov, P.A. Haas, D. von Harrach, M. Hoffmann, A. Hoghmrtsyan, N. d’Hose, C. -Y. Hsieh, S. Huber, S. Ishimoto, A. Ivanov, T. Iwata, V. Jary, R. Joosten, E. Kabuß, F. Kaspar, A. Kerbizi, B. Ketzer, A. Khatun, G.V. Khaustov, T. Klasek, F. Klein, J.H. Koivuniemi, V. N. Kolosov, K. Kondo Horikawa, I. Konorov, V.F. Konstantinov, A. Korzenev, A.M. Kotzinian, O. Kouznetsov, Zdeněk Král, F. Krinner, F. Kunne, K. Kurek, R. Kurjata, A. Kveton, K. Lavickova, S. Levorato, Y. -S. Lian, J. Lichtenstadt, P. -J. Lin, R. Longo, Valery E. Lyubovitskij, A. Maggiora, A. Magnon, N. Makke, G.K. Mallot, A. Maltsev, A. Martin, J. Marzec, J. Matoušek, T. Matsuda, G. Mattson, C. Menezes Pires, F. Metzger, Mareike Meyer, W. Meyer, Yu.V. Mikhailov, M. Mikhasenko, E. Mitrofanov, Daisuke Miura, Y. Miyachi, Romina Molina, A. Movsisyan, A. Nagaytsev, D. Neyret, M. Niemiec, J. Nový, W.‐D. Nowak, G. Nukazuka, А.G. Оlshevsky, M. Ostrick, D. Panzieri, B. Parsamyan, S. Paul, J. C. Peng, M. Pešek, D. V. Peshekhonov, M. Pešková, S. Platchkov, J. Pochodzalla, V. A. Polyakov, M. Quaresma, C. Quintans, G. Reicherz, D.I. Ryabchikov, A. Rychter, V. D. Samoylenko, A. Sandacz, S. Sarkar, I. Savin, G. Sbrizzai, H. Schmieden, A. Selyunin, Konstantin Sharko, L. Sinha, D. Spülbeck, A. Srnka, M. Stolarski, M. Šulc, H. Suzuki, Yoshifumi Takanashi, S. Tessaro, F. Tessarotto, A. Thiel, F. Tosello, T. Triloki, V. Tskhay, B. M. Veit, J.F.C.A. Veloso, B. Ventura, Miroslav Virius, Mathias Wagner, S. Wallner, К. Заремба, M. Zavertyaev, M. Zemko, M. Ziembicki
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Le résumé fourni par la source
New results are presented on a high-statistics measurement of Collins and Sivers asymmetries of charged hadrons produced in deep inelastic scattering of muons on a transversely polarised $^6$LiD target. The data were taken in 2022 with the COMPASS spectrometer using the 160 \gevv\ muon beam at CERN, balancing the existing data on transversely polarised proton targets. The first results from about two-thirds of the new data have total uncertainties smaller by up to a factor of three compared to the previous deuteron measurements. Using all the COMPASS proton and deuteron results, both the transversity and the Sivers distribution functions of the $u$ and $d$ quark, as well as the tensor charge in the measured $x$-range are extracted. In particular, the accuracy of the $d$ quark results is significantly improved.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
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Les sujets associés
Particle physics theoretical and experimental studiesHigh-Energy Particle Collisions ResearchQuantum Chromodynamics and Particle Interactions