Collins functions form recent e+e- data

Abstract

New investigations on the Collins functions have been made possible by recent e+ e? annihilation data released by the BaBar Collaboration. These data allow to directly infer the transverse momentum dependence of the Collins function for pions and, for the first time, attempt extractions of the kaon Collins function. In this talk, I will discuss our recent results of the analysis of these and other available data sets, within a simple gaussian model.