Intrinsic transverse momentum in hard processes

Abstract

In this contribution I discuss transverse momentum dependent quark distributions and their operator structure. Some of the experimental signatures, in particular in Drell-Yan scattering, are given.

Comments: 11 pages with 11 figures, LaTex, uses a4.sty and epsfig.sty. Invited talk at the Symposium "Deep inelastic scattering off polarized targets: theory meets experiment", Sep. 1-5, 1997, Zeuthen