PRODUCTION OF DRELL-YAN PAIRS IN PP COLLISIONS

We compute cross sections for the Drell-Yan process in N-N collisions at next-to-leading order in alpha(s). The mass, rapidity, transverse m omentum, and angular dependence of these cross sections are presented. An estimate of higher order corrections is obtained from next-to-next -to-leading order calculation of the mass distribution. We compare the results with some of the existing data to show the quality of the agr eement between calculations and data. We present predictions for energ ies that will become available at the RHIC and LHC colliders. Uncertai nties in these predictions due to choices of scale, scheme and parton distribution are discussed.