Soft breaking of BRST invariance for introducing non-perturbative infrared effects in a local and renormalizable way

Details Soft breaking of BRST invariance for introducing non-perturbative infrared effects in a local and renormalizable way Soft breaking of BRST invariance for introducing non-perturbative infrared effects in a local and renormalizable way

2008-08-09

arxiv.org/abs/0808.1356v1

Phys.Lett.B671:481-485,2009

Physics

High Energy Physics

High Energy Physics - Theory

11 pages

Scientific paper

10.1016/j.physletb.2008.11.036

The possibility of introducing non-perturbative infrared effects leading to a modification of the long distance behavior of gauge theories through a soft breaking of the BRST invariance is investigated. The method reproduces the Gribov-Zwanziger action describing the restriction of the domain of integration in the Feynman path integral to the Gribov region and a model for the dynamical quark mass generation is presented. The soft symmetry breaking relies on the introduction of BRST doublets and massive physical parameters, which allow one to distinguish the infrared region from the ultraviolet one, within the same theory.

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