Photon and Pion Production at High $p_T$

Abstract

We present a study of high-$p_T$ photon and pion production in hadronic interactions, focusing on a comparison of the yields with expectations from next-to-leading order perturbative QCD (NLO pQCD). We examine the impact of phenomenological models of $k_T$ smearing (which approximate effects of additional soft-gluon emission) on absolute predictions for photon and pion production and their ratio.

Comments: Talk given at CIPANP 2000 (7th Conference on the Intersections of Particle and Nuclear Physics), Quebec City, May 22-28, 2000; to be published in the conference Proceedings. The submission includes a LaTeX source file, and 6 postscript figures (5pp)