Infrared problem in the Faddeev-Popov ghost propagator in perturbative quantum gravity in de Sitter spacetime
نویسندگان
چکیده
The propagators for the Faddeev-Popov (FP) ghosts in Yang-Mills theory and perturbative gravity covariant gauge are infrared (IR) divergent de Sitter spacetime. An IR cutoff momentum space to regularize these divergences breaks invariance. These due spatially constant modes case proportional Killing vectors of gravity. It has been proposed that can be removed, with invariance preserved, by first regularizing them an additional mass term FP then taking massless limit. In case, this procedure shown correspond requiring physical states, vacuum state particular, annihilated some conserved charges Landau gauge. paper we show there similar spacetime IR-regularization described above also a natural definition interacting state.
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ژورنال
عنوان ژورنال: Physical review
سال: 2021
ISSN: ['0556-2813', '1538-4497', '1089-490X']
DOI: https://doi.org/10.1103/physrevd.103.065016