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Next-to-leading-order corrections to the gamma(*) impact factor: First numerical results for the real corrections to gamma(*)(L)

J. Bartels
Organization: 1II. Institut fuĻ r Theoretische Physik
A. Krieleis
Organization: University of Manchester
Department: 2Department of Physics & Astronomy
Journal / Anthology

Physical Review D
Year: 2004
Volume: 70
Issue: 11
Page range: 114003-1-114003-14

We analytically perform the transverse momentum integrations in the real corrections to the longitudinal 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 s0: They are found to be negative and, with decreasing values of s0, their absolute value increases.

*Mathematics > Calculus and Analysis > Special Functions
*Science > Physics > Nuclear and Particle Physics