Origins of single transverse spin asymmetries

Abstract

Single transverse spin asymmetries in p-p -> pion + X and l-p -> l-pion + X processes have been observed; their possible origins and connections are investigated. A phenomenological description within a pQCD generalized factorization scheme is discussed.

LaTeX, 4 pages; Talk delivered by M. Anselmino at the "International Workshop on the Spin Structure of the Proton and Polarized Collider Physics", July 23-28, 2001, Trento, Italy