Parton correlations in the proton; going beyond collinearity

Abstract

We discuss specific observables that can be measured in deep inelastic leptoproduction in the case of 1-particle inclusive measurements, namely azimuthal asymmetries. These asymmetries contain information on the intrinsic transverse momentum of partons, with close connection to the gluon dynamics in hadrons.

Comments: 16 pages with figures, LaTex, uses sprocl.sty and epsfig.sty. Invited talk at the workshop on Physics with Electron Polarized Ion Collider (EPIC99), IUCF, Bloomington, April 8 - 11, 1999