Measurement of PT-weighted Sivers asymmetries in leptoproduction of hadrons

The COMPASS Collaboration

doi:10.1016/j.nuclphysb.2018.12.024

Measurement of P_T-weighted Sivers asymmetries in leptoproduction of hadrons

The COMPASS Collaboration

Research output: Contribution to journal › Article

Abstract

The transverse spin asymmetries measured in semi-inclusive leptoproduction of hadrons, when weighted with the hadron transverse momentum P_T, 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 trans-verse 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 po-larised proton target, we have evaluated two types of P_T-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 uand dquarks.

Original language	English (US)
Pages (from-to)	34-53
Number of pages	20
Journal	Nuclear Physics B
Volume	940
DOIs	https://doi.org/10.1016/j.nuclphysb.2018.12.024
State	Published - Mar 2019

ASJC Scopus subject areas

Nuclear and High Energy Physics

Access to Document

10.1016/j.nuclphysb.2018.12.024

Fingerprint Dive into the research topics of 'Measurement of P<sub>T</sub>-weighted Sivers asymmetries in leptoproduction of hadrons'. Together they form a unique fingerprint.

Cite this

The COMPASS Collaboration (2019). Measurement of P_T-weighted Sivers asymmetries in leptoproduction of hadrons. Nuclear Physics B, 940, 34-53. https://doi.org/10.1016/j.nuclphysb.2018.12.024

@article{a7b23abb6038423e800fa929ce72103e,

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 trans-verse 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 po-larised 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 uand dquarks.",

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. Bade{\l}ek 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 S. DallaTorre and Dasgupta, {S. S.} and S. Dasgupta and Denisov, {O. Yu} and L. Dhara and N. Doshita and Ch Dreisbach and Dusaev, {R. R.} and M. Dziewiecki and A. Efremov and C. Elia and M. Faesslerd and A. Ferrero and Donskov, {S. V.} and Makins, {Naomi C R} and Jen-Chieh Peng and C. Riedl",

year = "2019",

month = mar,

doi = "10.1016/j.nuclphysb.2018.12.024",

language = "English (US)",

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 - DallaTorre, S.

AU - Dasgupta, S. S.

AU - Dasgupta, S.

AU - Denisov, O. Yu

AU - Dhara, L.

AU - Doshita, N.

AU - Dreisbach, Ch

AU - Dusaev, R. R.

AU - Dziewiecki, M.

AU - Efremov, A.

AU - Elia, C.

AU - Faesslerd, M.

AU - Ferrero, A.

AU - Donskov, S. V.

AU - Makins, Naomi C R

AU - Peng, Jen-Chieh

AU - Riedl, C.

PY - 2019/3

Y1 - 2019/3

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 trans-verse 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 po-larised 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 uand dquarks.

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 trans-verse 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 po-larised 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 uand dquarks.

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 -