Sivers effect in semi-inclusive DIS and in the Drell-Yan process
arXiv:hep-ph/0412353 · doi:10.1016/j.physletb.2005.03.010
Abstract
The Sivers parton distribution has been predicted to obey a particular ``universality relation'', namely to have opposite sign in semi-inclusive deeply inelastic scattering (SIDIS) and the Drell-Yan process. We discuss how, on the basis of present HERMES data, this remarkable prediction of the QCD factorization approach to the description of single spin asymmetries related to the Sivers effect could be checked experimentally in future experiments at PAX and COMPASS.
Discussion of recent COMPASS data included, minor corrections, figures and references added, close to published version
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