We study the Sivers effect in transverse single spin asymmetries (SSA) for pion and kaon production in Semi-Inclusive Deep Inelastic Scattering (SIDIS) processes. We perform a fit of A^{sin(phi_h-phi_S)}_UT taking into account the recent data from HERMES and COMPASS Collaborations, which allow a new determination of the Sivers distribution functions for quark and anti-quark with u, d and also s flavours. Estimates for forthcoming SIDIS experiments at COMPASS and JLab are given.
@article{arxiv.0807.0166,
title = {The Sivers Function from SIDIS Data},
author = {M. Anselmino and M. Boglione and U. D'Alesio and A. Kotzinian and S. Melis and F. Murgia and A. Prokudin and C. Turk},
journal= {arXiv preprint arXiv:0807.0166},
year = {2008}
}
Comments
4 pages, 1 figure. To appear in the proceedings of the XVI International Workshop on Deep-Inelastic Scattering and Related Subjects, DIS 2008, London, U.K., 7-11 April 2008