Soft breaking of BRST invariance for introducing non-perturbative infrared effects in a local and renormalizable way - High Energy Physics - TheoryReport as inadecuate




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Abstract: The possibility of introducing non-perturbative infrared effects leading to amodification of the long distance behavior of gauge theories through a softbreaking of the BRST invariance is investigated. The method reproduces theGribov-Zwanziger action describing the restriction of the domain of integrationin the Feynman path integral to the Gribov region and a model for the dynamicalquark mass generation is presented. The soft symmetry breaking relies on theintroduction of BRST doublets and massive physical parameters, which allow oneto distinguish the infrared region from the ultraviolet one, within the sametheory.



Author: L. Baulieu, S. P. Sorella

Source: https://arxiv.org/



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