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. 2024 Sep 6;133(10):101903.
doi: 10.1103/PhysRevLett.133.101903.

High-Statistics Measurement of Collins and Sivers Asymmetries for Transversely Polarized Deuterons

G D Alexeev  1 M G Alexeev  2   3 C Alice  2   3 A Amoroso  2   3 V Andrieux  4 V Anosov  1 S Asatryan  5 K Augsten  6 W Augustyniak  7 C D R Azevedo  8 B Badelek  9 J Barth  10 R Beck  10 J Beckers  11 Y Bedfer  12 J Bernhard  13 M Bodlak  14 F Bradamante  15 A Bressan  15   16 W-C Chang  17 C Chatterjee  15 M Chiosso  2   3 A G Chumakov  18 S-U Chung  11 A Cicuttin  19   15 P M M Correia  8 M L Crespo  19   15 D D'Ago  15   16 S Dalla Torre  15 S S Dasgupta  20 S Dasgupta  15 F Delcarro  2   3 I Denisenko  1 O Yu Denisov  2 S V Donskov  18 N Doshita  21 Ch Dreisbach  11 W Dünnweber  22 R R Dusaev  18 D Ecker  11 D Eremeev  18 P Faccioli  23 M Faessler  22 M Finger  14 M Finger  14 H Fischer  24 K J Flöthner  10 W Florian  19   15 J M Friedrich  11 V Frolov  1 L G Garcia Ordòñez  19   15 F Gautheron  25   4 O P Gavrichtchouk  1 S Gerassimov  11   18 J Giarra  26 D Giordano  2   3 A Grasso  2   3 A Gridin  1 M Grosse Perdekamp  4 B Grube  11 M Grüner  10 A Guskov  1 P Haas  11 D von Harrach  26 M Hoffmann  10 A Hoghmrtsyan  5 N d'Hose  12 C-Y Hsieh  17 S Huber  11 S Ishimoto  21 A Ivanov  1 T Iwata  21 V Jary  6 R Joosten  10 E Kabuß  26 F Kaspar  11 A Kerbizi  15   16 B Ketzer  10 A Khatun  12 G V Khaustov  18 T Klasek  14 F Klein  27 J H Koivuniemi  25   4 V N Kolosov  18 K Kondo Horikawa  21 I Konorov  11   18 V F Konstantinov  18 A Yu Korzenev  1 A M Kotzinian  5   2 O M Kouznetsov  1 A Koval  7 Z Kral  14 F Krinner  11 F Kunne  12 K Kurek  7 R P Kurjata  28 A Kveton  14 K Lavickova  6 S Levorato  15 Y-S Lian  17 J Lichtenstadt  29 P-J Lin  30 R Longo  4 V E Lyubovitskij  18 A Maggiora  2 A Magnon  20 N Makke  15 G K Mallot  24   13 A Maltsev  1 A Martin  15   16 J Marzec  28 J Matoušek  14 T Matsuda  31 G Mattson  4 C Menezes Pires  23 F Metzger  10 M Meyer  12   4 W Meyer  25 Yu V Mikhailov  18 M Mikhasenko  22 E Mitrofanov  1 D Miura  21 Y Miyachi  21 R Molina  19   15 A Moretti  15   16 A Movsisyan  5 A Nagaytsev  1 D Neyret  12 M Niemiec  9 J Nový  6 W-D Nowak  26 G Nukazuka  21 A G Olshevsky  1 M Ostrick  26 D Panzieri  2 B Parsamyan  5   2   13 S Paul  11 H Pekeler  10 J-C Peng  4 M Pešek  14 D V Peshekhonov  1 M Pešková  14 S Platchkov  12 J Pochodzalla  26 V A Polyakov  18 M Quaresma  23 C Quintans  23 G Reicherz  25 C Riedl  4 D I Ryabchikov  11   18 A Rychter  28 A Rymbekova  1 V D Samoylenko  18 A Sandacz  7 S Sarkar  20 I A Savin  1 G Sbrizzai  15 H Schmieden  27 A Selyunin  1 K Sharko  18 L Sinha  20 D Spülbeck  10 A Srnka  32 M Stolarski  23 M Sulc  33 H Suzuki  21 Y Takanashi  21 S Tessaro  15 F Tessarotto  15 A Thiel  10 F Tosello  2 A Townsend  4 T Triloki  15 V Tskhay  18 B Valinoti  19   15 B M Veit  26 J F C A Veloso  8 B Ventura  12 A Vijayakumar  4 M Virius  6 M Wagner  10 S Wallner  11 K Zaremba  28 M Zavertyaev  18 M Zemko  6   14 E Zemlyanichkina  1 M Ziembicki  28 COMPASS Collaboration
Affiliations

High-Statistics Measurement of Collins and Sivers Asymmetries for Transversely Polarized Deuterons

G D Alexeev et al. Phys Rev Lett. .

Abstract

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 polarized ^{6}LiD target. The data were taken in 2022 with the COMPASS spectrometer using the 160 GeV muon beam at CERN, statistically balancing the existing data on transversely polarized 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.

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