ar X iv : h ep - p h / 03 02 22 4 v 5 2 6 M ar 2 00 3 Budker INP 2003 - 13 RADIATIVE CORRECTIONS TO QCD AMPLITUDES IN QUASI - MULTI - REGGE KINEMATICS

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. Work supported in part by INTAS and in part by the Russian Fund of Basic Researches. e-mail address: [email protected] e-mail address: [email protected] e-mail address: [email protected]