Masslessness of ghosts in equivariantly gauge-fixed Yang--Mills theories

Details Masslessness of ghosts in equivariantly gauge-fixed Yang--Mills theories Masslessness of ghosts in equivariantly gauge-fixed Yang--Mills theories

2005-04-29

arxiv.org/abs/hep-lat/0504023v1

Phys.Rev. D71 (2005) 117502

Physics

High Energy Physics

High Energy Physics - Lattice

8 pages, revtex

Scientific paper

10.1103/PhysRevD.71.117502

We show that the one-loop ghost self-energy in an equivariantly gauge-fixed
Yang--Mills theory vanishes at zero momentum. A ghost mass is forbidden by
equivariant BRST symmetry, and our calculation confirms this explicitly. The
four-ghost self interaction which appears in the equivariantly gauge-fixed
Yang--Mills theory is needed in order to obtain this result.

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