On the FP-ghost propagators for Yang-Mills theories and perturbative quantum gravity in the covariant gauge in de Sitter spacetime

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dc.creatorFaizal, Mir
dc.creatorHiguchi, Atsushi
dc.date2008-06-23
dc.date2008-09-08
dc.date.accessioned2026-07-07T11:51:56Z
dc.date.available2026-07-07T11:51:56Z
dc.descriptionThe propagators of the Faddeev-Popov (FP) ghosts for Yang-Mills theories and perturbative quantum gravity in the covariant gauge are infrared (IR) divergent in de Sitter spacetime. We point out, however, that the modes responsible for these divergences will not contribute to loop diagrams in computations of time-ordered products in either Yang-Mills theories or perturbative quantum gravity. Therefore we propose that the IR divergent FP-ghost propagator should be regularized by a small mass term that is sent to zero in the end of any perturbative calculations. This proposal is equivalent to using the effective FP-ghost propagators, which we present in an explicit form, obtained by removing the modes responsible for the IR divergences. We also make some comments on the corresponding propagators in anti-de Sitter spacetime.
dc.description8 pages, to appear in Phys Rev D
dc.identifierhttps://arxiv.org/abs/0806.3735
dc.identifierhttp://arxiv.org/abs/0806.3735
dc.identifierPhys.Rev.D78:067502,2008
dc.identifierdoi:10.1103/PhysRevD.78.067502
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/204064
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Theory
dc.titleOn the FP-ghost propagators for Yang-Mills theories and perturbative quantum gravity in the covariant gauge in de Sitter spacetime
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