Unitarity corrections from the high energy QCD effective action
Abstract
Description
We investigate the derivation of reggeon transition vertices from Lipatov's gauge invariant effective action for high energy processes in QCD. In particular we address the question of longitudinal integrations in order to reduce the vertices into the required purely transverse form. We explicitly derive the BFKL-kernel and verify vanishing of the 2-to-3 reggeon transition vertex. First results on the derivation of the 2-to-4 reggeon transition vertex are discussed.
Presented at the School on QCD, Low x Physics, Saturation and Diffraction, Copanello, Italy, July 2007
Presented at the School on QCD, Low x Physics, Saturation and Diffraction, Copanello, Italy, July 2007