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22-27 March 2015
Hotel do Bosque
Brazil/East timezone

Non-perturbative BRST breaking, confinement and Gribov copies

26 Mar 2015, 10:30
Hotel do Bosque

Hotel do Bosque

Rodovia Mário Covas (Rio-Santos) BR - 101 Sul, Km 533, Angra dos Reis, RJ, Brazil
Oral presentation Field theoretical approaches to QCD Field theoretical approaches to QCD


Dr Leticia Palhares (UERJ)


In this seminar, we investigate the role of a non-perturbative breaking of the BRST invariance in the infrared regime of non-Abelian gauge theories and its possible relation to confinement. This breaking naturally arises from the procedure of quantization of Landau-gauge Yang-Mills theories that takes into account the presence of Gribov copies. The resulting non-perturbative framework -- the Refined Gribov-Zwanziger theory -- is consistent with different lattice data. One can also construct direct signatures of BRST breaking in the matter sector of confining Yang-Mills theories that are in principle accessible via lattice simulations, allowing for a new non-perturbative model of matter confinement that can be treated (semi-)analytically.

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