Double-transverse spin asymmetries at NLO

Abstract

We report on a next-to-leading order QCD calculation of the cross section and the spin asymmetry for isolated large-p_T prompt photon production in collisions of transversely polarized protons. Corresponding measurements may be used at RHIC to determine the transversity parton distributions of the proton.

Comments: 3 pages, LaTeX, 1 figure as eps file. Invited talk presented by W. Vogelsang at the "Conference on the Intersections of Particle and Nuclear Physics (CIPANP 2003)", New York City, May 19-24, 2003