The (gamma^*-q\bar q)-Reggeon Vertex in Next-to-Leading Order QCD

J. Bartels; S. Gieseke; C. -F. Qiao

Paper

The (gamma^*-q\bar q)-Reggeon Vertex in Next-to-Leading Order QCD

Abstract

As a first step towards the computation of the NLO corrections to the photon impact factor in the

scattering process, we calculate the one loop corrections to the coupling of the reggeized gluon to the

vertex. We list the results for the Feynman diagrams which contribute: all loop integrations are carried out, and the results are presented in the helicity basis of photon, quark, and antiquark.