@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 Donskov, {S. V.} and N. Doshita and Ch Dreisbach and W. D{\"u}nnweberd and Dusaev, {R. R.} and M. Dziewiecki and A. Efremov and C. Elia and M. GrossePerdekamp and N. Makins and Peng, {J. C.} and C. Riedl",
note = "Funding Information: We acknowledge the support of the CERN management and staff, as well as the skills and efforts of the technicians of the collaborating institutes. This work was made possible by the financial support of our funding agencies. ",
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",
}