Virtual Next-to-Leading Corrections to the Impact Factors in the High-Energy Limit

We compute the virtual next-to-leading corrections to the impact factors or off-shell coefficient functions in the high-energy limit, in the helicity-amplitude formalism. These agree with previous results by Fadin and collaborators, in the conventional dimensional-regularization scheme. When combined with the known real corrections, these results will provide the complete NLO corrections to the impact factors, which are necessary to use the BFKL resummation at NLL for jet production at both lepton-hadron and hadron-hadron colliders. 1 Introduction Semi-hard strong-interaction processes, which are characterized by two large and disparate kinematic scales, typically lead to cross sections containing large logarithms. Two examples of this type of process are Deep Inelastic Scattering (DIS) at small x and hadronic dijet production at large rapidity intervals \Deltay. In DIS the logarithm that appears is ln(1=x), with x ' Q 2 =s the squared ratio of the momentum transfer to the photon-..