Non-Gaussian stochastic gravitational waves from phase transitions

Abstract Cosmological phase transitions in the primordial universe can produce anisotropic stochastic gravitational wave backgrounds (GWB), similar to the cosmic microwave background (CMB). For adiabatic perturbations, the fluctuations in GWB follow those in the CMB, but if primordial fluctuations c...

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Autores principales:	Soubhik Kumar, Raman Sundrum, Yuhsin Tsai
Formato:	article
Lenguaje:	EN
Publicado:	SpringerOpen 2021
Materias:	Cosmology of Theories beyond the SM Beyond Standard Model Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
Acceso en línea:	https://doaj.org/article/b46c2baa2cb54a6bb33fe0e9d365da16
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spelling	oai:doaj.org-article:b46c2baa2cb54a6bb33fe0e9d365da162021-11-21T12:40:49ZNon-Gaussian stochastic gravitational waves from phase transitions10.1007/JHEP11(2021)1071029-8479https://doaj.org/article/b46c2baa2cb54a6bb33fe0e9d365da162021-11-01T00:00:00Zhttps://doi.org/10.1007/JHEP11(2021)107https://doaj.org/toc/1029-8479Abstract Cosmological phase transitions in the primordial universe can produce anisotropic stochastic gravitational wave backgrounds (GWB), similar to the cosmic microwave background (CMB). For adiabatic perturbations, the fluctuations in GWB follow those in the CMB, but if primordial fluctuations carry an isocurvature component, this need no longer be true. It is shown that in non-minimal inflationary and reheating settings, primordial isocurvature can survive in GWB and exhibit significant non-Gaussianity (NG) in contrast to the CMB, while obeying current observational bounds. While probing such NG GWB is at best a marginal possibility at LISA, there is much greater scope at future proposed detectors such as DECIGO and BBO. It is even possible that the first observations of inflation-era NG could be made with gravitational wave detectors as opposed to the CMB or Large-Scale Structure surveys.Soubhik KumarRaman SundrumYuhsin TsaiSpringerOpenarticleCosmology of Theories beyond the SMBeyond Standard ModelNuclear and particle physics. Atomic energy. RadioactivityQC770-798ENJournal of High Energy Physics, Vol 2021, Iss 11, Pp 1-21 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Cosmology of Theories beyond the SM Beyond Standard Model Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
spellingShingle	Cosmology of Theories beyond the SM Beyond Standard Model Nuclear and particle physics. Atomic energy. Radioactivity QC770-798 Soubhik Kumar Raman Sundrum Yuhsin Tsai Non-Gaussian stochastic gravitational waves from phase transitions
description	Abstract Cosmological phase transitions in the primordial universe can produce anisotropic stochastic gravitational wave backgrounds (GWB), similar to the cosmic microwave background (CMB). For adiabatic perturbations, the fluctuations in GWB follow those in the CMB, but if primordial fluctuations carry an isocurvature component, this need no longer be true. It is shown that in non-minimal inflationary and reheating settings, primordial isocurvature can survive in GWB and exhibit significant non-Gaussianity (NG) in contrast to the CMB, while obeying current observational bounds. While probing such NG GWB is at best a marginal possibility at LISA, there is much greater scope at future proposed detectors such as DECIGO and BBO. It is even possible that the first observations of inflation-era NG could be made with gravitational wave detectors as opposed to the CMB or Large-Scale Structure surveys.
format	article
author	Soubhik Kumar Raman Sundrum Yuhsin Tsai
author_facet	Soubhik Kumar Raman Sundrum Yuhsin Tsai
author_sort	Soubhik Kumar
title	Non-Gaussian stochastic gravitational waves from phase transitions
title_short	Non-Gaussian stochastic gravitational waves from phase transitions
title_full	Non-Gaussian stochastic gravitational waves from phase transitions
title_fullStr	Non-Gaussian stochastic gravitational waves from phase transitions
title_full_unstemmed	Non-Gaussian stochastic gravitational waves from phase transitions
title_sort	non-gaussian stochastic gravitational waves from phase transitions
publisher	SpringerOpen
publishDate	2021
url	https://doaj.org/article/b46c2baa2cb54a6bb33fe0e9d365da16
work_keys_str_mv	AT soubhikkumar nongaussianstochasticgravitationalwavesfromphasetransitions AT ramansundrum nongaussianstochasticgravitationalwavesfromphasetransitions AT yuhsintsai nongaussianstochasticgravitationalwavesfromphasetransitions
_version_	1718418909943562240

Non-Gaussian stochastic gravitational waves from phase transitions

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