Speaker
Daniel Gutiérrez Reyes
(Complutense University of Madrid)
Description
The factorization theorem for DY and semi-inclusive DIS holds for all leading twist transverse momentum distributions. However a QCD perturbative calculation shows several important characteristics of spin-dependent distributions. We consider the case of Helicity and Transversity, which are the only spin-dependent distributions which can be matched onto integrated twist-2 functions. We show how this matching has a scheme dependence and we evaluate also their power corrections using renormalons. We conclude proposing a general non-perturbative model for these distributions.
Authors
Daniel Gutiérrez Reyes
(Complutense University of Madrid)
Ignazio Scimemi
(Universidad Complutense (ES))
Alexey Vladimirov
