In order to check the compatibility of gluon Reggeization in QCD with s-channel unitarity, the one-loop correction to the Reggeon-Reggeon-gluon vertex must be known at arbitrary space-time dimension D. We obtain this correction from the gluon production amplitude in multi-Regge kinematics and present an explicit expression for it in terms of a few integrals over the transverse momenta of virtual particles. The one-gluon contribution to the nonforward Balitskii-Fadin-Kuraev-Lipatov ~BFKL! kernel at arbitrary D is also obtained.
One-loop Reggeon-Reggeon-gluon vertex at arbitrary space-time dimension
PAPA, Alessandro
2001-01-01
Abstract
In order to check the compatibility of gluon Reggeization in QCD with s-channel unitarity, the one-loop correction to the Reggeon-Reggeon-gluon vertex must be known at arbitrary space-time dimension D. We obtain this correction from the gluon production amplitude in multi-Regge kinematics and present an explicit expression for it in terms of a few integrals over the transverse momenta of virtual particles. The one-gluon contribution to the nonforward Balitskii-Fadin-Kuraev-Lipatov ~BFKL! kernel at arbitrary D is also obtained.File in questo prodotto:
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