Comments on the Gauge Fixed BRST Cohomology and the Quantum Noether Method

Details Comments on the Gauge Fixed BRST Cohomology and the Quantum Noether Method Comments on the Gauge Fixed BRST Cohomology and the Quantum Noether Method

2003-06-13

arxiv.org/abs/hep-th/0306127v3

Phys.Lett.B588:111-118,2004

Physics

High Energy Physics

High Energy Physics - Theory

24 pages, example section improved, short version without background material will appear in Physics Letters B

Scientific paper

10.1016/j.physletb.2004.03.035

We discuss in detail the relation between the gauge fixed and gauge invariant BRST cohomology. We showed previously that in certain gauges some cohomology classes of the gauge-fixed BRST differential do not correspond to gauge invariant observables. We now show that in addition ``accidental'' conserved currents may appear. These correspond one-to-one to observables that become trivial in this gauge. We explicitly show how the gauge-fixed BRST cohomology appears in the context of the Quantum Noether Method.

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