Cosmological particle production and pairwise hotspots on the CMB

Abstract Heavy particles with masses much bigger than the inflationary Hubble scale H *, can get non-adiabatically pair produced during inflation through their couplings to the inflaton. If such couplings give rise to time-dependent masses for the heavy particles, then following their production, th...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Jeong Han Kim, Soubhik Kumar, Adam Martin, Yuhsin Tsai
Formato:	article
Lenguaje:	EN
Publicado:	SpringerOpen 2021
Materias:	Beyond Standard Model Cosmology of Theories beyond the SM Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
Acceso en línea:	https://doaj.org/article/8ce90e951c6948aeb3812e3ab5f4557f
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:8ce90e951c6948aeb3812e3ab5f4557f
record_format	dspace
spelling	oai:doaj.org-article:8ce90e951c6948aeb3812e3ab5f4557f2021-11-28T12:40:29ZCosmological particle production and pairwise hotspots on the CMB10.1007/JHEP11(2021)1581029-8479https://doaj.org/article/8ce90e951c6948aeb3812e3ab5f4557f2021-11-01T00:00:00Zhttps://doi.org/10.1007/JHEP11(2021)158https://doaj.org/toc/1029-8479Abstract Heavy particles with masses much bigger than the inflationary Hubble scale H , can get non-adiabatically pair produced during inflation through their couplings to the inflaton. If such couplings give rise to time-dependent masses for the heavy particles, then following their production, the heavy particles modify the curvature perturbation around their locations in a time-dependent and scale non-invariant manner. This results into a non-trivial spatial profile of the curvature perturbation that is preserved on superhorizon scales and eventually generates localized hot or cold spots on the CMB. We explore this phenomenon by studying the inflationary production of heavy scalars and derive the final temperature profile of the spots on the CMB by taking into account the subhorizon evolution, focusing in particular on the parameter space where pairwise hot spots (PHS) arise. When the heavy scalar has an O $$ \mathcal{O} $$ (1) coupling to the inflaton, we show that for an idealized situation where the dominant background to the PHS signal comes from the standard CMB fluctuations themselves, a simple position space search based on applying a temperature cut, can be sensitive to heavy particle masses M 0 /H ∼ O $$ \mathcal{O} $$ (100). The corresponding PHS signal also modifies the CMB power spectra and bispectra, although the corrections are below (outside) the sensitivity of current measurements (searches).Jeong Han KimSoubhik KumarAdam MartinYuhsin TsaiSpringerOpenarticleBeyond Standard ModelCosmology of Theories beyond the SMNuclear and particle physics. Atomic energy. RadioactivityQC770-798ENJournal of High Energy Physics, Vol 2021, Iss 11, Pp 1-36 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Beyond Standard Model Cosmology of Theories beyond the SM Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
spellingShingle	Beyond Standard Model Cosmology of Theories beyond the SM Nuclear and particle physics. Atomic energy. Radioactivity QC770-798 Jeong Han Kim Soubhik Kumar Adam Martin Yuhsin Tsai Cosmological particle production and pairwise hotspots on the CMB
description	Abstract Heavy particles with masses much bigger than the inflationary Hubble scale H , can get non-adiabatically pair produced during inflation through their couplings to the inflaton. If such couplings give rise to time-dependent masses for the heavy particles, then following their production, the heavy particles modify the curvature perturbation around their locations in a time-dependent and scale non-invariant manner. This results into a non-trivial spatial profile of the curvature perturbation that is preserved on superhorizon scales and eventually generates localized hot or cold spots on the CMB. We explore this phenomenon by studying the inflationary production of heavy scalars and derive the final temperature profile of the spots on the CMB by taking into account the subhorizon evolution, focusing in particular on the parameter space where pairwise hot spots (PHS) arise. When the heavy scalar has an O $$ \mathcal{O} $$ (1) coupling to the inflaton, we show that for an idealized situation where the dominant background to the PHS signal comes from the standard CMB fluctuations themselves, a simple position space search based on applying a temperature cut, can be sensitive to heavy particle masses M 0 /H ∼ O $$ \mathcal{O} $$ (100). The corresponding PHS signal also modifies the CMB power spectra and bispectra, although the corrections are below (outside) the sensitivity of current measurements (searches).
format	article
author	Jeong Han Kim Soubhik Kumar Adam Martin Yuhsin Tsai
author_facet	Jeong Han Kim Soubhik Kumar Adam Martin Yuhsin Tsai
author_sort	Jeong Han Kim
title	Cosmological particle production and pairwise hotspots on the CMB
title_short	Cosmological particle production and pairwise hotspots on the CMB
title_full	Cosmological particle production and pairwise hotspots on the CMB
title_fullStr	Cosmological particle production and pairwise hotspots on the CMB
title_full_unstemmed	Cosmological particle production and pairwise hotspots on the CMB
title_sort	cosmological particle production and pairwise hotspots on the cmb
publisher	SpringerOpen
publishDate	2021
url	https://doaj.org/article/8ce90e951c6948aeb3812e3ab5f4557f
work_keys_str_mv	AT jeonghankim cosmologicalparticleproductionandpairwisehotspotsonthecmb AT soubhikkumar cosmologicalparticleproductionandpairwisehotspotsonthecmb AT adammartin cosmologicalparticleproductionandpairwisehotspotsonthecmb AT yuhsintsai cosmologicalparticleproductionandpairwisehotspotsonthecmb
_version_	1718407844407017472

Cosmological particle production and pairwise hotspots on the CMB

Ejemplares similares