High-statistics measurement of Collins and Sivers asymmetries for transversely polarised deuterons

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 CER...

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Published inarXiv.org
Main Authors Alexeev, G D, Alexeev, M G, Alice, C, Amoroso, A, Andrieux, V, Anosov, V, Augsten, K, Beck, R, Beckers, J, Bedfer, Y, Bernhard, J, Bodlak, M, Bradamante, F, Bressan, A, Chiosso, M, S -U Chung, Cicuttin, A, Crespo, M L, Dasgupta, S S, Dasgupta, S, Delcarro, F, Denisenko, I, O Yu Denisov, Donskov, S V, Ecker, D, Faessler, M, Finger, M, Frolov, V, Gavrichtchouk, O P, Giarra, J, Giordano, D, Grasso, A, Gridin, A, Grube, B, Gruner, M, Haas, P, D von Harrach, Hoffmann, M, d'Hose, N, Ishimoto, S, Jary, V, Joosten, R, Kerbizi, A, Khaustov, G V, Klein, F, Kolosov, V N, K Kondo Horikawa, Konorov, I, A Yu Korzenev, Kouznetsov, O M, Kurjata, R P, Levorato, S, Lichtenstadt, J, P -J Lin, Longo, R, Lyubovitskij, V E, Maggiora, A, Magnon, A, Makke, N, Marzec, J, Mattson, G, C Menezes Pires, Metzger, F, Meyer, W, Mikhailov, Yu V, Mikhasenko, M, Miura, D, Moretti, A, Movsisyan, A, Nagaytsev, A, Novy, J, W -D Nowak, Ostrick, M, Panzieri, D, Paul, S, Pekeler, H, Pesek, M, Peskova, M, Pochodzalla, J, Riedl, C, Ryabchikov, D I, Samoylenko, V D, Sarkar, S, Sbrizzai, G, Selyunin, A, Sinha, L, Stolarski, M, Sulc, M, Tessaro, S, Tosello, F, Townsend, A, Triloki, T, Veit, B M, Ventura, B, Vijayakumar, A, Wallner, S, Zavertyaev, M, Zemko, M, Zemlyanichkina, E, Ziembicki, M
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 30.12.2023
Subjects
Asymmetry
CERN
Deuterons
Distribution functions
Hadrons
Inelastic scattering
Muons
Particle beams
Protons
Quarks
Tensors
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Summary: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.
ISSN:2331-8422