Semi-Inclusive DIS and Transversity

Abstract

A review is presented of some aspects of semi-inclusive deeply inelastic scattering and transversity. In particular, the role of $k_T$-dependent and higher-twist (or multi-parton) distributions in generating single-spin asymmetries is discussed.

Comments: 8 pages, uses aipproc.cls, feynmp, psfrag, and some personal packages (included); invited talk presented at HiX 2004, Marseille, 26-28 July 2004