Soft-collinear effects in prompt photon production

Abstract

We extend next-to-leading logarithmic threshold and joint resummation for prompt photon production to include leading collinear effects. The impact of these effects is assessed for both fixed-target and collider kinematics. We find them in general to be small, but noticeable.

Comments: 14 pages, 12 figures, added comment on fragmentation contribution and one more reference. Version to appear in Phys. Rev. D