Is soft breaking of BRST symmetry consistent?

Details Is soft breaking of BRST symmetry consistent? Is soft breaking of BRST symmetry consistent?

2011-08-24

arxiv.org/abs/1108.4820v3

Physics

High Energy Physics

High Energy Physics - Theory

1+16 pages; v2: example of section 5 changed to R_xi gauges; v3: small corrections to section 5, one reference added, publishe

Scientific paper

A definition of soft breaking of BRST symmetry in the field-antifield formalism is proposed, valid for general gauge theories and arbitrary gauge fixing. The Ward identities for the generating functionals of Green's functions are derived, and their gauge dependence is investigated. We discuss the Gribov-Zwanziger action for the one-parameter family of R_xi gauges. It is argued that gauge theories with a soft breaking of BRST symmetry are inconsistent.

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