Collins and Sivers transverse-spin asymmetries in inclusive muoproduction of ρ0 mesons

The COMPASS Collaboration

doi:10.1016/j.physletb.2023.137950

Collins and Sivers transverse-spin asymmetries in inclusive muoproduction of ρ⁰ mesons

The COMPASS Collaboration

School of Physics and Astronomy

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

7 Scopus citations

Abstract

The production of vector mesons in deep inelastic scattering is an interesting yet scarcely explored channel to study the transverse spin structure of the nucleon and the spin-dependence of fragmentation. The COMPASS collaboration has performed the first measurement of the Collins and Sivers asymmetries for inclusively produced ρ⁰ mesons. The analysis is based on the data set collected in deep inelastic scattering in 2010 using a 160GeV/c μ⁺ beam impinging on a transversely polarized NH₃ target. The ρ⁰ mesons are selected from oppositely charged hadron pairs, and the asymmetries are extracted as a function of the Bjorken-x variable, the transverse momentum of the pair and the fraction of the energy z carried by the pair. Indications for positive Collins and Sivers asymmetries are observed.

Original language	English
Article number	137950
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	843
DOIs	https://doi.org/10.1016/j.physletb.2023.137950
State	Published - 10 Aug 2023

Funding

Funders	Funder number
Israel Academy of Sciences and Humanities
Università degli Studi del Piemonte Orientale
Ministry of Science and Technology, Taiwan
Bundesministerium für Bildung und Forschung
Deutsche Forschungsgemeinschaft
Daiko and Yamada Foundations
Horizon 2020
Ministry of Education, Culture, Sports, Science and Technology
Narodowe Centrum Nauki	2020/37/B/ST2/01547
Labex	ANR-10-LABX-0038, ANR-11-IDEX-0003-01
National Science Foundation	1506416
Ministerstvo Školství, Mládeže a Tělovýchovy	LM2015058, LM2018104, LTT17018
Fundação para a Ciência e a Tecnologia	CERN/FIS-PAR/0016/2021, CERN/FIS-PAR/0022/2019
Japan Society for the Promotion of Science	18002006, 20540299, 26247032, 18540281
Horizon 2020 Framework Programme	824093
Not added	ANR-11-IDEX-0003
Univerzita Karlova v Praze	PRIMUS/22/SCI/017

Keywords

Collins asymmetry
Fragmentation
SIDIS
Sivers asymmetry
Spin

Access to Document

10.1016/j.physletb.2023.137950

Cite this

@article{ccc353352af64f8da613014783a0d0f4,

title = "Collins and Sivers transverse-spin asymmetries in inclusive muoproduction of ρ0 mesons",

abstract = "The production of vector mesons in deep inelastic scattering is an interesting yet scarcely explored channel to study the transverse spin structure of the nucleon and the spin-dependence of fragmentation. The COMPASS collaboration has performed the first measurement of the Collins and Sivers asymmetries for inclusively produced ρ0 mesons. The analysis is based on the data set collected in deep inelastic scattering in 2010 using a 160GeV/c μ+ beam impinging on a transversely polarized NH3 target. The ρ0 mesons are selected from oppositely charged hadron pairs, and the asymmetries are extracted as a function of the Bjorken-x variable, the transverse momentum of the pair and the fraction of the energy z carried by the pair. Indications for positive Collins and Sivers asymmetries are observed.",

keywords = "Collins asymmetry, Fragmentation, SIDIS, Sivers asymmetry, Spin",

author = "{The 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 Y. Bedfer and J. Bernhard and M. Bodlak and F. Bradamante and A. Bressan and Burtsev, {V. E.} 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 {Del Carro}, F. 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 A. Efremov and C. Elia and D. Eremeev and P. Faccioli and M. Faessler and M. Finger and H. Fischer and Fl{\"o}thner, {K. J.} and W. Florian and Friedrich, {J. M.} and J. Lichtenstadt",

note = "Publisher Copyright: {\textcopyright} 2023 The Author(s)",

year = "2023",

month = aug,

day = "10",

doi = "10.1016/j.physletb.2023.137950",

language = "אנגלית",

volume = "843",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Collins and Sivers transverse-spin asymmetries in inclusive muoproduction of ρ0 mesons

AU - The 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 - Bedfer, Y.

AU - Bernhard, J.

AU - Bodlak, M.

AU - Bradamante, F.

AU - Bressan, A.

AU - Burtsev, V. E.

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 - Del Carro, 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 - Efremov, A.

AU - Elia, C.

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 - Lichtenstadt, J.

PY - 2023/8/10

Y1 - 2023/8/10

N2 - The production of vector mesons in deep inelastic scattering is an interesting yet scarcely explored channel to study the transverse spin structure of the nucleon and the spin-dependence of fragmentation. The COMPASS collaboration has performed the first measurement of the Collins and Sivers asymmetries for inclusively produced ρ0 mesons. The analysis is based on the data set collected in deep inelastic scattering in 2010 using a 160GeV/c μ+ beam impinging on a transversely polarized NH3 target. The ρ0 mesons are selected from oppositely charged hadron pairs, and the asymmetries are extracted as a function of the Bjorken-x variable, the transverse momentum of the pair and the fraction of the energy z carried by the pair. Indications for positive Collins and Sivers asymmetries are observed.

AB - The production of vector mesons in deep inelastic scattering is an interesting yet scarcely explored channel to study the transverse spin structure of the nucleon and the spin-dependence of fragmentation. The COMPASS collaboration has performed the first measurement of the Collins and Sivers asymmetries for inclusively produced ρ0 mesons. The analysis is based on the data set collected in deep inelastic scattering in 2010 using a 160GeV/c μ+ beam impinging on a transversely polarized NH3 target. The ρ0 mesons are selected from oppositely charged hadron pairs, and the asymmetries are extracted as a function of the Bjorken-x variable, the transverse momentum of the pair and the fraction of the energy z carried by the pair. Indications for positive Collins and Sivers asymmetries are observed.

KW - Collins asymmetry

KW - Fragmentation

KW - SIDIS

KW - Sivers asymmetry

KW - Spin

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U2 - 10.1016/j.physletb.2023.137950

DO - 10.1016/j.physletb.2023.137950

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AN - SCOPUS:85163177746

SN - 0370-2693

VL - 843

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

M1 - 137950

ER -