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

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Faddeev-Popov ghost propagators for Yang-Mills theories and perturbative quantum gravity in the covariant gauge in de Sitter spacetime. / Mir, Faizal; Higuchi, Atsushi.

In: Physical review d, Vol. 78, No. 6, 067502, 26.09.2008, p. 1.

Research output: Contribution to journalArticlepeer-review

Harvard

Mir, F & Higuchi, A 2008, 'Faddeev-Popov ghost propagators for Yang-Mills theories and perturbative quantum gravity in the covariant gauge in de Sitter spacetime', Physical review d, vol. 78, no. 6, 067502, pp. 1. https://doi.org/http://link.aps.org/doi/10.1103/PhysRevD.78.067502

APA

Mir, F., & Higuchi, A. (2008). Faddeev-Popov ghost propagators for Yang-Mills theories and perturbative quantum gravity in the covariant gauge in de Sitter spacetime. Physical review d, 78(6), 1. [067502]. https://doi.org/http://link.aps.org/doi/10.1103/PhysRevD.78.067502

Vancouver

Mir F, Higuchi A. Faddeev-Popov ghost propagators for Yang-Mills theories and perturbative quantum gravity in the covariant gauge in de Sitter spacetime. Physical review d. 2008 Sep 26;78(6):1. 067502. https://doi.org/http://link.aps.org/doi/10.1103/PhysRevD.78.067502

Author

Mir, Faizal ; Higuchi, Atsushi. / Faddeev-Popov ghost propagators for Yang-Mills theories and perturbative quantum gravity in the covariant gauge in de Sitter spacetime. In: Physical review d. 2008 ; Vol. 78, No. 6. pp. 1.

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@article{d04c97562ce24418b256a6257376e4c7,
title = "Faddeev-Popov ghost propagators for Yang-Mills theories and perturbative quantum gravity in the covariant gauge in de Sitter spacetime",
abstract = "The 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.",
keywords = "INFLATIONARY UNIVERSE, DESITTER SPACE, FIELD-THEORY, SUPERNOVAE, FLATNESS, HORIZON",
author = "Faizal Mir and Atsushi Higuchi",
year = "2008",
month = sep,
day = "26",
doi = "http://link.aps.org/doi/10.1103/PhysRevD.78.067502",
language = "English",
volume = "78",
pages = "1",
journal = "Physical review d",
issn = "1550-7998",
publisher = "American Physical Society",
number = "6",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Faddeev-Popov ghost propagators for Yang-Mills theories and perturbative quantum gravity in the covariant gauge in de Sitter spacetime

AU - Mir, Faizal

AU - Higuchi, Atsushi

PY - 2008/9/26

Y1 - 2008/9/26

N2 - The 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.

AB - The 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.

KW - INFLATIONARY UNIVERSE

KW - DESITTER SPACE

KW - FIELD-THEORY

KW - SUPERNOVAE

KW - FLATNESS

KW - HORIZON

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U2 - http://link.aps.org/doi/10.1103/PhysRevD.78.067502

DO - http://link.aps.org/doi/10.1103/PhysRevD.78.067502

M3 - Article

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SP - 1

JO - Physical review d

JF - Physical review d

SN - 1550-7998

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