Quasi-multi-Regge Processes with a Quark Exchange in the t-channel
  The QCD amplitudes for particle's production in the quasi-multi-Regge kinematics with a quark exchange in crossing channels are calculated in the Born approximation. In particular they are needed to find next-to-leading corrections to the quark Regge trajectory and to the integral kernel of the Bethe-Salpeter equation for the t-channel partial wave with fermion quantum numbers and a negative signature. The gauge-invariant action for the interaction of the reggeized quarks and gluons with the usual particles is constructed. 
L. N. Lipatov (PNPI, St.Petersburg), M. I. Vyazovsky (SPb. State   University, St.Petersburg)