On the infrared behaviour of Gluons and Ghosts in Ghost-Antighost symmetric gauges

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dc.creatorAlkofer, R.
dc.creatorFischer, C. S.
dc.creatorReinhardt, H.
dc.creatorvon Smekal, L.
dc.date2003-04-15
dc.date2003-06-11
dc.date.accessioned2026-07-07T11:10:10Z
dc.date.available2026-07-07T11:10:10Z
dc.descriptionTo investigate the possibility of a ghost-antighost condensate the coupled Dyson--Schwinger equations for the gluon and ghost propagators in Yang--Mills theories are derived in general covariant gauges, including ghost-antighost symmetric gauges. The infrared behaviour of these two-point functions is studied in a bare-vertex truncation scheme which has proven to be successful in Landau gauge. In all linear covariant gauges the same infrared behaviour as in Landau gauge is found: The gluon propagator is infrared suppressed whereas the ghost propagator is infrared enhanced. This infrared singular behaviour provides indication against a ghost-antighost condensate. In the ghost-antighost symmetric gauges we find that the infrared behaviour of the gluon and ghost propagators cannot be determined when replacing all dressed vertices by bare ones. The question of a BRST invariant dimension two condensate remains to be further studied.
dc.description34 pages, 6 figures, Version to be published in Phys. Rev. D
dc.identifierhttps://arxiv.org/abs/hep-th/0304134
dc.identifierhttp://arxiv.org/abs/hep-th/0304134
dc.identifierPhys.Rev.D68:045003,2003
dc.identifierdoi:10.1103/PhysRevD.68.045003
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/190707
dc.subjectHigh Energy Physics - Theory
dc.titleOn the infrared behaviour of Gluons and Ghosts in Ghost-Antighost symmetric gauges
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