REGGEIZATION OF THE QUARK-QUARK SCATTERING-AMPLITUDE IN QCD

s-channel discontinuity of the quark-quark scattering amplitude with g luon quantum numbers in the t channel and a negative signature is calc ulated in the Regge kinematical region in the two-loop approximation. Using this discontinuity and assuming that the Regge asymptotic behavi or is given by the Reggeized gluon contribution, we calculate the gluo n trajectory in the two-loop approximation. Remarkable cancellations l ead to the independence of the trajectory on properties of the scatter ed quarks, confirming the gluon Reggeization.