One-loop corrections to the primordial tensor spectrum from massless isocurvature fields

One-loop corrections to the primordial tensor spectrum from massless isocurvature fields

We study one-loop corrections to the two-point correlation function of tensor perturbations in primordial cosmology induced by massless spectator matter fields. Using the Schwinger-Keldysh formalism in cosmological perturbation theory, we employ dimensional regularization and cutoff regularization t...

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Main Author: Tan, Hai Siong
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2020
Subjects:
Science::Physics
Classical Theories of Gravity
Cosmology of Theories Beyond the SM
Online Access:https://hdl.handle.net/10356/145595
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1455952023-02-28T19:54:50Z One-loop corrections to the primordial tensor spectrum from massless isocurvature fields Tan, Hai Siong School of Physical and Mathematical Sciences Science::Physics Classical Theories of Gravity Cosmology of Theories Beyond the SM We study one-loop corrections to the two-point correlation function of tensor perturbations in primordial cosmology induced by massless spectator matter fields. Using the Schwinger-Keldysh formalism in cosmological perturbation theory, we employ dimensional regularization and cutoff regularization to study the finite quantum corrections at one-loop arising from isocurvature fields of the massless scalar, fermion and abelian gauge field which are freely propagating on the FRW spacetime. For all cases, we find a logarithmic running of the form Cq3H4M4p log (Hμ) where C is a negative constant related to the beta function, H is the Hubble parameter at horizon exit and μ is the renormalization scale. Nanyang Technological University Published version I am very grateful to an anonymous referee for various useful advice, especially for his/her comments on the regularization procedures presented in [2] which led to an improvementover a previous manuscript draft. I am indebted to Chu Chong-Sun, Neal Snyderman, Ori Ganor, Petr Horava and Daniel Robbins for their moral support during the course of completion of this work. This work is partially supported by a research fellowship at the School of Physical and Mathematical Sciences, Nanyang Technological University of Singapore. 2020-12-30T01:46:16Z 2020-12-30T01:46:16Z 2020 Journal Article Tan, H. S. (2020). One-loop corrections to the primordial tensor spectrum from massless isocurvature fields. Journal of High Energy Physics, 2020(10), 186-. doi:10.1007/JHEP10(2020)186 1126-6708 https://hdl.handle.net/10356/145595 10.1007/JHEP10(2020)186 10 2020 en Journal of High Energy Physics © 2020 The Authors. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Science::Physics
Classical Theories of Gravity
Cosmology of Theories Beyond the SM
spellingShingle Science::Physics
Classical Theories of Gravity
Cosmology of Theories Beyond the SM
Tan, Hai Siong
One-loop corrections to the primordial tensor spectrum from massless isocurvature fields
description We study one-loop corrections to the two-point correlation function of tensor perturbations in primordial cosmology induced by massless spectator matter fields. Using the Schwinger-Keldysh formalism in cosmological perturbation theory, we employ dimensional regularization and cutoff regularization to study the finite quantum corrections at one-loop arising from isocurvature fields of the massless scalar, fermion and abelian gauge field which are freely propagating on the FRW spacetime. For all cases, we find a logarithmic running of the form Cq3H4M4p log (Hμ) where C is a negative constant related to the beta function, H is the Hubble parameter at horizon exit and μ is the renormalization scale.
author2 School of Physical and Mathematical Sciences
author_facet School of Physical and Mathematical Sciences
Tan, Hai Siong
format Article
author Tan, Hai Siong
author_sort Tan, Hai Siong
title One-loop corrections to the primordial tensor spectrum from massless isocurvature fields
title_short One-loop corrections to the primordial tensor spectrum from massless isocurvature fields
title_full One-loop corrections to the primordial tensor spectrum from massless isocurvature fields
title_fullStr One-loop corrections to the primordial tensor spectrum from massless isocurvature fields
title_full_unstemmed One-loop corrections to the primordial tensor spectrum from massless isocurvature fields
title_sort one-loop corrections to the primordial tensor spectrum from massless isocurvature fields
publishDate 2020
url https://hdl.handle.net/10356/145595
_version_ 1759856223731056640

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