Measurement of PT-weighted Sivers asymmetries in leptoproduction of hadrons

The COMPASS Collaboration, Sergey Alexandrovich Mamon

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The transverse spin asymmetries measured in semi-inclusive leptoproduction of hadrons, when weighted with the hadron transverse momentum PT, allow for the extraction of important transverse-momentum-dependent distribution functions. In particular, the weighted Sivers asymmetries provide direct information on the Sivers function, which is a leading-twist distribution that arises from a correlation between the transverse momentum of an unpolarised quark in a transversely polarised nucleon and the spin of the nucleon. Using the high-statistics data collected by the COMPASS Collaboration in 2010 with a transversely polarised proton target, we have evaluated two types of PT-weighted Sivers asymmetries, which are both proportional to the product of the first transverse moment of the Sivers function and of the fragmentation function. The results are compared to the standard unweighted Sivers asymmetries and used to extract the first transverse moments of the Sivers distributions for u and d quarks.

Original languageEnglish
Pages (from-to)34-53
Number of pages20
JournalNuclear Physics B
Volume940
DOIs
Publication statusPublished - 1 Mar 2019

Fingerprint

hadrons
asymmetry
transverse momentum
quarks
moments
COMPASS (programming language)
fragmentation
distribution functions
statistics
protons
products

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Measurement of PT-weighted Sivers asymmetries in leptoproduction of hadrons. / The COMPASS Collaboration ; Mamon, Sergey Alexandrovich.

In: Nuclear Physics B, Vol. 940, 01.03.2019, p. 34-53.

Research output: Contribution to journalArticle

@article{3cffac41ecba42f4bde46f22ef5ad934,
title = "Measurement of PT-weighted Sivers asymmetries in leptoproduction of hadrons",
abstract = "The transverse spin asymmetries measured in semi-inclusive leptoproduction of hadrons, when weighted with the hadron transverse momentum PT, allow for the extraction of important transverse-momentum-dependent distribution functions. In particular, the weighted Sivers asymmetries provide direct information on the Sivers function, which is a leading-twist distribution that arises from a correlation between the transverse momentum of an unpolarised quark in a transversely polarised nucleon and the spin of the nucleon. Using the high-statistics data collected by the COMPASS Collaboration in 2010 with a transversely polarised proton target, we have evaluated two types of PT-weighted Sivers asymmetries, which are both proportional to the product of the first transverse moment of the Sivers function and of the fragmentation function. The results are compared to the standard unweighted Sivers asymmetries and used to extract the first transverse moments of the Sivers distributions for u and d quarks.",
author = "{The COMPASS Collaboration} and Alexeev, {M. G.} and Alexeev, {G. D.} and A. Amoroso and V. Andrieux and Anfimov, {N. V.} and V. Anosov and A. Antoshkin and K. Augsten and W. Augustyniak and Azevedo, {C. D.R.} and B. Badełek and F. Balestra and M. Ball and J. Barth and V. Barone and R. Beck and Y. Bedfer and J. Bernhard and K. Bicker and Bielert, {E. R.} and M. Bodlak and P. Bordalo and F. Bradamante and A. Bressan and M. B{\"u}chele 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 Crespo, {M. L.} and {Dalla Torre}, S. and Dasgupta, {S. S.} and S. Dasgupta and Denisov, {O. Yu} and L. Dhara and Donskov, {S. V.} and N. Doshita and Ch Dreisbach and W. D{\"u}nnweber and Dusaev, {R. R.} and M. Dziewiecki and A. Efremov and C. Elia and Eversheim, {P. D.} and M. Faessler and Lyubovitskij, {V. E.} and Vasilishin, {B. I.} and Mamon, {Sergey Alexandrovich}",
year = "2019",
month = "3",
day = "1",
doi = "10.1016/j.nuclphysb.2018.12.024",
language = "English",
volume = "940",
pages = "34--53",
journal = "Nuclear Physics B",
issn = "0550-3213",
publisher = "Elsevier",

}

TY - JOUR

T1 - Measurement of PT-weighted Sivers asymmetries in leptoproduction of hadrons

AU - The COMPASS Collaboration

AU - Alexeev, M. G.

AU - Alexeev, G. D.

AU - Amoroso, A.

AU - Andrieux, V.

AU - Anfimov, N. V.

AU - Anosov, V.

AU - Antoshkin, A.

AU - Augsten, K.

AU - Augustyniak, W.

AU - Azevedo, C. D.R.

AU - Badełek, B.

AU - Balestra, F.

AU - Ball, M.

AU - Barth, J.

AU - Barone, V.

AU - Beck, R.

AU - Bedfer, Y.

AU - Bernhard, J.

AU - Bicker, K.

AU - Bielert, E. R.

AU - Bodlak, M.

AU - Bordalo, P.

AU - Bradamante, F.

AU - Bressan, A.

AU - Büchele, M.

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 - Crespo, M. L.

AU - Dalla Torre, S.

AU - Dasgupta, S. S.

AU - Dasgupta, S.

AU - Denisov, O. Yu

AU - Dhara, L.

AU - Donskov, S. V.

AU - Doshita, N.

AU - Dreisbach, Ch

AU - Dünnweber, W.

AU - Dusaev, R. R.

AU - Dziewiecki, M.

AU - Efremov, A.

AU - Elia, C.

AU - Eversheim, P. D.

AU - Faessler, M.

AU - Lyubovitskij, V. E.

AU - Vasilishin, B. I.

AU - Mamon, Sergey Alexandrovich

PY - 2019/3/1

Y1 - 2019/3/1

N2 - The transverse spin asymmetries measured in semi-inclusive leptoproduction of hadrons, when weighted with the hadron transverse momentum PT, allow for the extraction of important transverse-momentum-dependent distribution functions. In particular, the weighted Sivers asymmetries provide direct information on the Sivers function, which is a leading-twist distribution that arises from a correlation between the transverse momentum of an unpolarised quark in a transversely polarised nucleon and the spin of the nucleon. Using the high-statistics data collected by the COMPASS Collaboration in 2010 with a transversely polarised proton target, we have evaluated two types of PT-weighted Sivers asymmetries, which are both proportional to the product of the first transverse moment of the Sivers function and of the fragmentation function. The results are compared to the standard unweighted Sivers asymmetries and used to extract the first transverse moments of the Sivers distributions for u and d quarks.

AB - The transverse spin asymmetries measured in semi-inclusive leptoproduction of hadrons, when weighted with the hadron transverse momentum PT, allow for the extraction of important transverse-momentum-dependent distribution functions. In particular, the weighted Sivers asymmetries provide direct information on the Sivers function, which is a leading-twist distribution that arises from a correlation between the transverse momentum of an unpolarised quark in a transversely polarised nucleon and the spin of the nucleon. Using the high-statistics data collected by the COMPASS Collaboration in 2010 with a transversely polarised proton target, we have evaluated two types of PT-weighted Sivers asymmetries, which are both proportional to the product of the first transverse moment of the Sivers function and of the fragmentation function. The results are compared to the standard unweighted Sivers asymmetries and used to extract the first transverse moments of the Sivers distributions for u and d quarks.

UR - http://www.scopus.com/inward/record.url?scp=85060236648&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85060236648&partnerID=8YFLogxK

U2 - 10.1016/j.nuclphysb.2018.12.024

DO - 10.1016/j.nuclphysb.2018.12.024

M3 - Article

AN - SCOPUS:85060236648

VL - 940

SP - 34

EP - 53

JO - Nuclear Physics B

JF - Nuclear Physics B

SN - 0550-3213

ER -