Gluon Confinement in Chromoelectric Vacuum
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.
KeywordsInclusive Cross Section Stable Vacuum Gluon Condensate Collinear Singularity Colour Degree
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