Comments on the Gauge Fixed BRST Cohomology and the Quantum Noether Method
نویسندگان
چکیده
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-toone 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. Based on an invited lecture presented by T.H. at the Hesselberg Meeting 2002 ”Theory of Renormalization and Regularization”, Hesselberg, Germany Research Associate of the National Fund for Scientific Research (Belgium) Heisenberg Fellow
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