Gluon Regge Trajectory in the two-loop Approximation

V. S. Fadin; R. Fiore; M. I. Kotsky

Paper

Gluon Regge Trajectory in the two-loop Approximation

Abstract

Evaluating two-loop integrals in the transverse momentum space we obtain the trajectory of the Reggeized gluon in QCD in an explicit form in the two-loop approximation. It is presented as an expansion in powers of

for the space-time dimension

tending to the physical value

. As the result of a remarkable cancellation the third order pole in

disappears in the trajectory and the expansion starts with