SIDIS Asymmetries in Quark-Diquark Model

Abstract

Some properties of intrinsic transverse momentum dependent nucleon distribution functions are considered in the simple quark-diquark model. The transverse target polarization dependent asymmetries for SIDIS are calculated and compared with recent results of COMPASS. The model describes well the measured asymmetries. Generalization of quark-diquark model for Sivers function is discussed.

Comments: to appear in proceedings of Transversity 2008 Workshop, May 28-31 2008, Ferrara (Italy). In V2 Fig. 1. is corrected