NLO Corrections to the \gamma* Impact Factor: First Numerical Results for the Real Corrections to \gamma*_L

Abstract

We analytically perform the transverse momentum integrations in the real corrections to the longitudinal \gamma*_L impact factor. The resulting integrals are Feynman parameter integrals, and we provide a MATHEMATICA file which contains the integrands. The remaining integrals are carried out numerically. We perform a numerical test, and we compute those parts of the impact factor which depend upon the energy scale s_0: they are found to be negative and, with decreasing values of s_0, their absolute value increases.

Comments: 27 pages, 5 figures, uses revtex4; misprint in fig.4,5 and typos corrected; for associated files, see http://www.desy.de/uni-th/smallx/kyrie/ImpFactor/index.html