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High Energy Physics - Theory

arXiv:hep-th/0506165 (hep-th)
[Submitted on 20 Jun 2005]

Title:A study of the Gribov copies in linear covariant gauges in Euclidean Yang-Mills theories

Authors:R.F. Sobreiro, S.P. Sorella
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Abstract: The Gribov copies and their consequences on the infrared behavior of the gluon propagator are investigated in Euclidean Yang-Mills theories quantized in linear covariant gauges. Considering small values of the gauge parameter, it turns out that the transverse component of the gluon propagator is suppressed, while its longitudinal part is left unchanged. A Green function, G_{tr}, which displays infrared enhancement and which reduces to the ghost propagator in the Landau gauge is identified. The inclusion of the dimension two gluon condensate <A^2> is also considered. In this case, the transverse component of the gluon propagator and the Green function G_{tr} remain suppressed and enhanced, respectively. Moreover, the longitudinal part of the gluon propagator becomes suppressed. A comparison with the results obtained from the studies of the Schwinger-Dyson equations and from lattice simulations is provided.
Comments: 20 pages
Subjects: High Energy Physics - Theory (hep-th); High Energy Physics - Lattice (hep-lat); High Energy Physics - Phenomenology (hep-ph)
Cite as: arXiv:hep-th/0506165
  (or arXiv:hep-th/0506165v1 for this version)
  https://doi.org/10.48550/arXiv.hep-th/0506165
Journal reference: JHEP 0506 (2005) 054
Related DOI: https://doi.org/10.1088/1126-6708/2005/06/054

Submission history

From: Silvio Paolo Sorella [view email]
[v1] Mon, 20 Jun 2005 21:43:19 UTC (18 KB)
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