The Sivers distributions recently extracted from semi-inclusive deep inelastic scattering data [1] are used to compute estimates for Sivers asymmetries in Drell-Yan processes which are being planned at several facilities (RHIC, COMPASS, J-PARC, PAX, PANDA, NICA (JINR) and SPASCHARM (IHEP)). Most of these asymmetries turn out to be large and could allow a clear test of the predicted sign change of the Sivers distributions when active in SIDIS and Drell-Yan processes. This is regarded as a fundamental test of our understanding, within QCD and the factorization scheme, of single spin asymmetries.
@article{arxiv.0901.3078,
title = {Sivers effect in Drell-Yan processes},
author = {M. Anselmino and M. Boglione and U. D'Alesio and S. Melis and F. Murgia and A. Prokudin},
journal= {arXiv preprint arXiv:0901.3078},
year = {2009}
}