Non-Universality and Evolution of the Sivers Function

Abstract

We examine the large-x QCD evolution of the twist-three gluonic-pole strength defining an effective T-odd Sivers function, where evolution of the T-even transverse-spin DIS structure function g2 is multiplicative. The result corresponds to a colour-factor modified spin-averaged twist-two evolution.

Comments: Presented at the ECT* Workshop on Recent Advances in Perturbative QCD and Hadronic Physics (20-25 July 2009} - final version (minor modifications)