Radiative corrections to QCD amplitudes in quasi-multi-Regge kinematics

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Abstract
Radiative corrections to QCD amplitudes in the quasi-multi-Regge kinematics are interesting, in particular, since the Reggeized form of these amplitudes is used in the derivation of the NLO BFKL. This form is a hypothesis which must be at least carefully checked, if not proved. We calculate the radiative corrections in the one-loop approximation using the s-channel unitarity. Compatibility of the Reggeized form of the amplitudes with the s-channel unitarity requires fulfillment of the set of nonlinear equations for the Reggeon vertices. We show that these equations are satisfied.