Gluon Confinement in Chromoelectric Vacuum

Abstract

While the study of perturbative QCD has yielded important insights into the nature of the strong force at least in the high energy/momentum region, there are still outstanding problems in the low energy sector. For example, the Bloch-Nordsieck mechanism for cancellation of infra-red(IR) divergences doesn’t in general work in QCD (unlike QED)² unless one is looking at ‘suitably’ inclusive cross sections. The main reason for this is the presence of interacting massless particles which typically give rise to infra-red or collinear singularities. It has been suggested that if we could do perturbation theory about a different vacuum which has no interacting massless particles then such problems could be ameliorated.