Single spin asymmetries in QCD

Abstract

Measurements of single transverse spin asymmetries in high energy inclusive processes have always shown unexpected and challenging results. Several cases are considered and discussed within a QCD approach which couples perturbative dynamics to new non perturbative partonic information; the aim is that of developing a consistent phenomenological description of these unusual single spin phenomena, based on a generalized QCD factorization scheme.

Comments: 14 pages, lectures delivered at School on "Symmetries and Spin", Praha-SPIN-2001, Prague, July 15 - July 28, 2001