Regular Article - Theoretical Physics
On the elimination of infinitesimal Gribov ambiguities in non-Abelian gauge theories
Instituto de Física, Campus da Praia Vermelha, UFF—Universidade Federal Fluminense, Avenida General Milton Tavares de Souza s/n, 24210-346, Niterói, RJ, Brazil
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Published online: 2 October 2013
An alternative method to account for the Gribov ambiguities in gauge theories is presented. It is shown that, to eliminate Gribov ambiguities, at infinitesimal level, it is required to break the BRST symmetry in a soft manner. This can be done by introducing a suitable extra constraint that eliminates the infinitesimal Gribov copies. It is shown that the present approach is consistent with the well established known cases in the literature, i.e., the Landau and maximal Abelian gauges. The method is valid for gauges depending exclusively on the gauge field and is restricted to classical level. However, occasionally, we deal with quantum aspects of the technique, which are used to improve the results.
© Springer-Verlag Berlin Heidelberg and Società Italiana di Fisica, 2013