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

(COMPASS Collaboration)

doi:10.1103/PhysRevLett.133.071902

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

(COMPASS Collaboration)

Chair of Physics I

European Organization for Nuclear Research
INFN Sez. di Torino
University of Torino
University of Illinois
Czech Technical University in Prague
National Center for Nuclear Research (NCBJ)
University of Aveiro
University of Warsaw
Rheinische Friedrich-Wilhelms-Universität Bonn
Technical University of Munich
University Paris-Sud
Charles University in Prague
INFN- Sezione di Trieste
University of Trieste Via A
Academia Sinica Taipei
Pusan National University
Brookhaven National Laboratory
ICTP
Matrivani Institute of Experimental Research & Education
NISER
Yamagata University
Ludwig-Maximilians-Universität München
LIP - Lisboa
Albert-Ludwigs-Universität Freiburg
Max-Planck-lnstitut für Kohlenforschung
Johannes Gutenberg University
High Energy Accelerator Research Organization (KEK)
A.I. Alikhanyan National Science Laboratory (YerPhi)
Warsaw Institute of Technology
National Kaohsiung Normal University
Tel Aviv University
National Central University
University of Tübingen
University of Miyazaki
Cluster of Excellence E-conversion
University of Eastern Piedmont
Institute of Scientific Instruments of the Academy of Sciences of the Czech Republic
Technical University of Liberec
Chubu University
Fairmont State University

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

The COMPASS Collaboration performed measurements of the Drell-Yan process in 2015 and 2018 using a 190 GeV/c π- 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.

Original language	English
Article number	071902
Journal	Physical Review Letters
Volume	133
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevLett.133.071902
State	Published - 16 Aug 2024

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10.1103/PhysRevLett.133.071902

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@article{ed817cf043654d04b8a6959b07b46e5b,

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

abstract = "The COMPASS Collaboration performed measurements of the Drell-Yan process in 2015 and 2018 using a 190 GeV/c π- 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.",

author = "\{(COMPASS Collaboration)\} and Alexeev, \{G. D.\} and Alexeev, \{M. G.\} and C. Alice and A. Amoroso and V. Andrieux and V. Anosov and K. Augsten and W. Augustyniak and Azevedo, \{C. D.R.\} and B. Badelek and J. Barth and R. Beck and J. Beckers and Y. Bedfer and J. Bernhard and M. Bodlak and F. Bradamante and A. Bressan and Chang, \{W. C.\} and C. Chatterjee and M. Chiosso and Chumakov, \{A. G.\} and Chung, \{S. U.\} and A. Cicuttin and Correia, \{P. M.M.\} and Crespo, \{M. L.\} and D. D'Ago and \{Dalla Torre\}, S. and Dasgupta, \{S. S.\} and S. Dasgupta and F. Delcarro and I. Denisenko and Denisov, \{O. Yu\} and Donskov, \{S. V.\} and N. Doshita and Ch Dreisbach and W. D{\"u}nnweber and Dusaev, \{R. R.\} and D. Ecker and D. Eremeev and P. Faccioli and M. Faessler and M. Finger and M. Finger and H. Fischer and Fl{\"o}thner, \{K. J.\} and W. Florian and Friedrich, \{J. M.\} and V. Frolov and S. Paul",

note = "Publisher Copyright: {\textcopyright} 2024 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the {"}https://creativecommons.org/licenses/by/4.0/{"}Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.",

year = "2024",

month = aug,

day = "16",

doi = "10.1103/PhysRevLett.133.071902",

language = "English",

volume = "133",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "7",

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TY - JOUR

T1 - Final COMPASS Results on the Transverse-Spin-Dependent Azimuthal Asymmetries in the Pion-Induced Drell-Yan Process

AU - (COMPASS Collaboration)

AU - Alexeev, G. D.

AU - Alexeev, M. G.

AU - Alice, C.

AU - Amoroso, A.

AU - Andrieux, V.

AU - Anosov, V.

AU - Augsten, K.

AU - Augustyniak, W.

AU - Azevedo, C. D.R.

AU - Badelek, B.

AU - Barth, J.

AU - Beck, R.

AU - Beckers, J.

AU - Bedfer, Y.

AU - Bernhard, J.

AU - Bodlak, M.

AU - Bradamante, F.

AU - Bressan, A.

AU - Chang, W. C.

AU - Chatterjee, C.

AU - Chiosso, M.

AU - Chumakov, A. G.

AU - Chung, S. U.

AU - Cicuttin, A.

AU - Correia, P. M.M.

AU - Crespo, M. L.

AU - D'Ago, D.

AU - Dalla Torre, S.

AU - Dasgupta, S. S.

AU - Dasgupta, S.

AU - Delcarro, F.

AU - Denisenko, I.

AU - Denisov, O. Yu

AU - Donskov, S. V.

AU - Doshita, N.

AU - Dreisbach, Ch

AU - Dünnweber, W.

AU - Dusaev, R. R.

AU - Ecker, D.

AU - Eremeev, D.

AU - Faccioli, P.

AU - Faessler, M.

AU - Finger, M.

AU - Fischer, H.

AU - Flöthner, K. J.

AU - Florian, W.

AU - Friedrich, J. M.

AU - Frolov, V.

AU - Paul, S.

N1 - Publisher Copyright: © 2024 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.

PY - 2024/8/16

Y1 - 2024/8/16

N2 - The COMPASS Collaboration performed measurements of the Drell-Yan process in 2015 and 2018 using a 190 GeV/c π- 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.

AB - The COMPASS Collaboration performed measurements of the Drell-Yan process in 2015 and 2018 using a 190 GeV/c π- 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.

UR - https://www.scopus.com/pages/publications/85201266834

U2 - 10.1103/PhysRevLett.133.071902

DO - 10.1103/PhysRevLett.133.071902

M3 - Article

AN - SCOPUS:85201266834

SN - 0031-9007

VL - 133

JO - Physical Review Letters

JF - Physical Review Letters

IS - 7

M1 - 071902

ER -

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

Abstract

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