Phenomenology of Sivers Effect with TMD Evolution

Abstract

Following the TMD evolution scheme recently proposed for the unpolarized and the Sivers distribution function, we propose a simple strategy to take into account this TMD Q^2 dependence in our phenomenological extraction of the Sivers function from SIDIS data. New results are presented and possible future applications are discussed.

Comments: Contribution to the Proceedings of the XX International Workshop on Deep-Inelastic Scattering and related subjects (DIS2012), 26-30 March 2012, Bonn, Germany. One figure corrected