Gluon Regge Trajectory in the two-loop Approximation
V. S. Fadin, R. Fiore, M. I. Kotsky
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 (D-4) for the space-time dimension D tending to the physical value D=4. As the result of a remarkable cancellation the third order pole inD-4 disappears in the trajectory and the expansion starts with (D-4)-2.
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