Computation of gravitational particle production using adiabatic invariants

Abstract Analytic and numerical techniques are presented for computing gravitational production of scalar particles in the limit that the inflaton mass is much larger than the Hubble expansion rate at the end of inflation. These techniques rely upon adiabatic invariants and time modeling of a typica...

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Autores principales:	Edward E. Basso, Daniel J. H. Chung
Formato:	article
Lenguaje:	EN
Publicado:	SpringerOpen 2021
Materias:	Cosmology of Theories beyond the SM Models of Quantum Gravity Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
Acceso en línea:	https://doaj.org/article/8ff6536c8e0f4473a3d387c629547c09
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spelling	oai:doaj.org-article:8ff6536c8e0f4473a3d387c629547c092021-11-21T12:41:39ZComputation of gravitational particle production using adiabatic invariants10.1007/JHEP11(2021)1461029-8479https://doaj.org/article/8ff6536c8e0f4473a3d387c629547c092021-11-01T00:00:00Zhttps://doi.org/10.1007/JHEP11(2021)146https://doaj.org/toc/1029-8479Abstract Analytic and numerical techniques are presented for computing gravitational production of scalar particles in the limit that the inflaton mass is much larger than the Hubble expansion rate at the end of inflation. These techniques rely upon adiabatic invariants and time modeling of a typical inflaton field which has slow and fast time variation components. A faster computation time for numerical integration is achieved via subtraction of slowly varying components that are ultimately exponentially suppressed. The fast oscillatory remnant results in production of scalar particles with a mass larger than the inflationary Hubble expansion rate through a mechanism analogous to perturbative particle scattering. An improved effective Boltzmann collision equation description of this particle production mechanism is developed. This model allows computation of the spectrum using only adiabatic invariants, avoiding the need to explicitly solve the inflaton equations of motion.Edward E. BassoDaniel J. H. ChungSpringerOpenarticleCosmology of Theories beyond the SMModels of Quantum GravityNuclear and particle physics. Atomic energy. RadioactivityQC770-798ENJournal of High Energy Physics, Vol 2021, Iss 11, Pp 1-48 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Cosmology of Theories beyond the SM Models of Quantum Gravity Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
spellingShingle	Cosmology of Theories beyond the SM Models of Quantum Gravity Nuclear and particle physics. Atomic energy. Radioactivity QC770-798 Edward E. Basso Daniel J. H. Chung Computation of gravitational particle production using adiabatic invariants
description	Abstract Analytic and numerical techniques are presented for computing gravitational production of scalar particles in the limit that the inflaton mass is much larger than the Hubble expansion rate at the end of inflation. These techniques rely upon adiabatic invariants and time modeling of a typical inflaton field which has slow and fast time variation components. A faster computation time for numerical integration is achieved via subtraction of slowly varying components that are ultimately exponentially suppressed. The fast oscillatory remnant results in production of scalar particles with a mass larger than the inflationary Hubble expansion rate through a mechanism analogous to perturbative particle scattering. An improved effective Boltzmann collision equation description of this particle production mechanism is developed. This model allows computation of the spectrum using only adiabatic invariants, avoiding the need to explicitly solve the inflaton equations of motion.
format	article
author	Edward E. Basso Daniel J. H. Chung
author_facet	Edward E. Basso Daniel J. H. Chung
author_sort	Edward E. Basso
title	Computation of gravitational particle production using adiabatic invariants
title_short	Computation of gravitational particle production using adiabatic invariants
title_full	Computation of gravitational particle production using adiabatic invariants
title_fullStr	Computation of gravitational particle production using adiabatic invariants
title_full_unstemmed	Computation of gravitational particle production using adiabatic invariants
title_sort	computation of gravitational particle production using adiabatic invariants
publisher	SpringerOpen
publishDate	2021
url	https://doaj.org/article/8ff6536c8e0f4473a3d387c629547c09
work_keys_str_mv	AT edwardebasso computationofgravitationalparticleproductionusingadiabaticinvariants AT danieljhchung computationofgravitationalparticleproductionusingadiabaticinvariants
_version_	1718418838251372544

Computation of gravitational particle production using adiabatic invariants

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