Quark part of the nonforward BFKL kernel and the "bootstrap" for the gluonReggeization - art. no. 074025

We calculate the quark part of the kernel of the generalized nonforward BFK L equation at nonzero momentum transfer t in the next-to-leading logarithmi c approximation. Along with the quark contribution to the gluon Regge traje ctory, this part includes pieces coming from the quark-antiquark production and from the quark contribution to the radiative corrections in one-gluon production in Reggeon-Reggeon collisions. The results obtained can be used for an arbitrary representation of the color group in the t channel. Using the results for the adjoint representation, we demonstrate explicitly the f ulfillment of the "bootstrap" condition for the gluon Reggeization in the n ext-to-leading logarithmic approximation in the part concerning the quark c ontribution. [S0556-2821(99)02817-9].