Gluon Regge trajectory in the two loop approximation

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 in

D-4

disappears in the trajectory and the expansion starts with

(D-4)~{-2}

.

Note:

13 pages, Latex Report-no: BUDKERINP/96-35 - CS-TH 3/96

quantum chromodynamics
gluon: Regge poles
perturbation theory: higher-order
transverse momentum
quark: Regge poles
renormalization

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