Final COMPASS Results on the Transverse-Spin-Dependent Azimuthal Asymmetries in the Pion-Induced Drell-Yan Process

被引：0

作者：

Alexeev, G. D. ^{[28
]}

Alexeev, M. G. ^{[19
,20
]}

Alice, C. ^{[19
,20
]}

Amoroso, A. ^{[19
,20
]}

Andrieux, V. ^{[32
]}

Anosov, V. ^{[28
]}

Augsten, K. ^{[4
]}

Augustyniak, W. ^{[23
]}

Azevedo, C. D. R. ^{[26
]}

Badelek, B. ^{[25
]}

Barth, J. ^{[8
]}

Beck, R. ^{[8
]}

Beckers, J. ^{[12
]}

Bedfer, Y. ^{[6
]}

Bernhard, J. ^{[28
]}

Bodlak, M. ^{[5
]}

Bradamante, F. ^{[17
]}

Bressan, A. ^{[17
,18
]}

Chang, W. -C. ^{[29
]}

Chatterjee, C. ^{[17
]}

Chiosso, M. ^{[19
,20
]}

Chumakov, A. G. ^{[28
]}

Chung, S. -U. ^{[12
]}

Cicuttin, A. ^{[16
,17
]}

Correia, P. M. M. ^{[26
]}

Crespo, M. L. ^{[16
,17
]}

D'Ago, D. ^{[17
,18
]}

Torre, S. Dalla ^{[17
]}

Dasgupta, S. S. ^{[14
]}

Dasgupta, S. ^{[17
,33
]}

Delcarro, F. ^{[19
,20
]}

Denisenko, I. ^{[28
]}

Denisov, O. Yu. ^{[19
]}

Donskov, S. V. ^{[28
]}

Doshita, N. ^{[22
]}

Dreisbach, Ch. ^{[12
]}

Duennweber, W. ^{[13
]}

Dusaev, R. R. ^{[28
]}

Ecker, D. ^{[12
]}

Eremeev, D. ^{[28
]}

Faccioli, P. ^{[27
]}

Faessler, M. ^{[13
]}

Finger, M. ^{[5
]}

Finger, M., Jr. ^{[5
]}

Fischer, H. ^{[10
]}

Floethner, K. J. ^{[8
]}

Florian, W. ^{[16
,17
]}

Friedrich, J. M. ^{[12
]}

Frolov, V. ^{[28
]}

Ordonez, L. G. Garcia ^{[16
,17
]}

机构：

[1] A I Alikhanyan Natl Sci Lab, 2 Alikhanyan Br St, Yerevan 0036, Armenia

[2] CAS, Inst Sci Instruments, Brno 61264, Czech Republic

[3] Tech Univ Liberec, Liberec 46117, Czech Republic

[4] Czech Tech Univ, Prague 16636, Czech Republic

[5] Charles Univ Prague, Fac Math & Phys, Prague 12116, Czech Republic

[6] Univ Paris Saclay, IRFU, CEA, F-91191 Gif Sur Yvette, France

[7] Univ Bochum, Inst Experimentalphys, D-44780 Bochum, Germany

[8] Univ Bonn, Helmholtz Inst Strahlen & Kernphys, D-53115 Bonn, Germany

[9] Univ Bonn, Phys Inst, D-53115 Bonn, Germany

[10] Univ Freiburg, Phys Inst, D-79104 Freiburg, Germany

[11] Johannes Gutenberg Univ Mainz, Inst Kernphys, D-55099 Mainz, Germany

[12] Techn Univ Munchen, Phys Dept, D-85748 Garching, Germany

[13] Ludwig Maximilians Univ Munchen, D-80539 Munich, Germany

[14] Matrivani Inst Expt Res & Educ, Kolkata 700030, India

[15] Tel Aviv Univ, Sch Phys & Astron, IL-69978 Tel Aviv, Israel

[16] Abdus Salam Int Ctr Theoret Phys, I-34151 Trieste, Italy

[17] INFN, Trieste Sect, I-34127 Trieste, Italy

[18] Univ Trieste, Dept Phys, I-34127 Trieste, Italy

[19] INFN, Torino Sect, I-10125 Turin, Italy

[20] Univ Torino, Dept Phys, I-10125 Turin, Italy

[21] Univ Miyazaki, Miyazaki 8892192, Japan

[22] Yamagata Univ, Yamagata 9928510, Japan

[23] Natl Ctr Nucl Res, PL-02093 Warsaw, Poland

[24] Warsaw Univ Technol, Inst Radioelect, PL-00665 Warsaw, Poland

[25] Univ Warsaw, Fac Phys, PL-02093 Warsaw, Poland

[26] Univ Aveiro, Dept Phys, P-3810193 Aveiro, Portugal

[27] LIP, P-1649003 Lisbon, Portugal

[28] CERN, CH-1211 Geneva 23, Switzerland

[29] Acad Sinica, Inst Phys, Taipei 11529, Taiwan

[30] Natl Cent Univ, Ctr High Energy & High Field Phys, 300 Zhongda Rd, Zhongli 320317, Taiwan

[31] Natl Cent Univ, Dept Phys, 300 Zhongda Rd, Zhongli 320317, Taiwan

[32] Univ Illinois, Dept Phys, Urbana, IL 61801 USA

[33] NISER, Ctr Med & Radiat Phys, Bubaneswar, India

[34] KEK, I-1 Oho, Tsukuba, Ibaraki 3050801, Japan

[35] Natl Kaohsiung Normal Univ, Dept Phys, Kaohsiung 824, Taiwan

[36] Univ Tubingen, Inst Theoret Phys, D-72076 Tubingen, Germany

[37] ORIGINS Excellence Cluster, D-85748 Garching, Germany

[38] Univ Piemonte Orientale, I-15100 Alessandria, Italy

[39] Chubu Univ, Kasugai, Aichi 4878501, Japan

来源：

PHYSICAL REVIEW LETTERS | 2024年 / 133卷 / 07期

基金：

美国国家科学基金会;

关键词：

STATE INTERACTIONS; SIVERS ASYMMETRIES; LEADING-TWIST; DISTRIBUTIONS; COLLINS; SIDIS; KAONS;

D O I：

10.1103/PhysRevLett.133.071902

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The COMPASS Collaboration performed measurements of the Drell-Yan process in 2015 and 2018 using a 190 GeV/c pi(-) beam impinging on a transversely polarized ammonia target. Combining the data of both years, we present final results on the amplitudes of five azimuthal modulations, which correspond to transverse-spin-dependent azimuthal asymmetries (TSAs) in the dimuon production cross section. Three of them probe the nucleon leading-twist Sivers, transversity, and pretzelosity transverse-momentum dependent (TMD) parton distribution functions (PDFs). The other two are induced by subleading effects. These TSAs provide unique new inputs for the study of the nucleon TMD PDFs and their universality properties. In particular, the Sivers TSA observed in this measurement is consistent with the fundamental QCD prediction of a sign change of naive time-reversal-odd TMD PDFs when comparing the Drell-Yan process with deep inelastic scattering. Also, within the context of model predictions, the observed transversity TSA is consistent with the expectation of a sign change for the Boer-Mulders function.

引用

页数：8

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