High energy scattering in perturbative QCD

Abstract

Abstract In these lectures some perturbative approaches to the description of high energy scattering processes in QCD are reviewed. It is shown, that the gluon is reggeized and the pomeron is a compound state of two reggeized gluons. We demonstrate, that the equations for compound states of an arbitrary number of reggeized gluons in the multi-colour QCD have remarkable mathematical properties. In the conclusion the effective action describing the gluon-Reggeon interactions is discussed.