Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2008-08-09
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.
Baulieu Laurent
Sorella Silvio Paolo
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