Twist-3 effects in polarized Drell-Yan and semi-inclusive DIS

Abstract

Two twist-3 processes are discussed. We first present a simple estimate of the longitudinal-transverse spin asymmetry in the polarized Drell-Yan process. We next derive a cross section for the semi-inclusive production of a polarized spin-1/2 baryon in the DIS of an unpolarized electron off the polarized nucleon.

Comments: Latex file 3 pages. Talk presented at DIS'99 (DESY-Zeuthen, April 19-23, 1999.)