Primordial gravitational waves in non-minimally coupled chromo-natural inflation

We consider inflation driven by an axion-like particle coupled to an SU(2) gauge sector via a Chern-Simons term. Known as chromo-natural inflation, this scenario is in tension with CMB observations. In order to remedy this fact and preserve both the symmetries and the intriguing gravitational wave p...

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Detalles Bibliográficos
Autores: Dimastrogiovanni, E., Fasiello, M., Michelotti, M., Pinol, L.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2024
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/383149
Acceso en línea:http://hdl.handle.net/10261/383149
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85186073548&doi=10.1088%2f1475-7516%2f2024%2f02%2f039&partnerID=40&md5=1e38bd8c4942c5b1204ce97d20e1d200
Access Level:acceso abierto
Palabra clave:Cosmological perturbation theory
Inflation
Inflation and CMBR theory
Primordial gravitational waves (theory)
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spelling Primordial gravitational waves in non-minimally coupled chromo-natural inflationDimastrogiovanni, E.Fasiello, M.Michelotti, M.Pinol, L.Cosmological perturbation theoryInflationInflation and CMBR theoryPrimordial gravitational waves (theory)We consider inflation driven by an axion-like particle coupled to an SU(2) gauge sector via a Chern-Simons term. Known as chromo-natural inflation, this scenario is in tension with CMB observations. In order to remedy this fact and preserve both the symmetries and the intriguing gravitational wave phenomenology exhibited by the model, we explore the non-minimal coupling of the axion-inflaton to the Einstein tensor. We identify regions of parameter space corresponding to a viable cosmology at CMB scales. We also highlight the possibility of a non-trivial chiral gravitational wave signal at small scales. © 2024 The Author(s)We are indebted to Ameek Malhotra and Alex Papageorgiou for several insightful comments. MF and LP would like to acknowledge support from the “Ramón y Cajal” grant RYC2021- 033786-I. MF acknowledges past support from the “Atracción de Talento” grant 2019-T1/TIC15784. MF’s and LP’s work is partially supported by the Spanish Research Agency (Agencia Estatal de Investigación) through the Grant IFT Centro de Excelencia Severo Ochoa No CEX2020-001007-S, funded by MCIN/AEI/10.13039/501100011033.With funding form the Spanish government through the "Severa Ochoa Centre of Excellence" accreditation (CEX2020-001007-S)Peer reviewedIOP PublishingMinisterio de Ciencia e Innovación (España)Agencia Estatal de Investigación (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202520252024info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/383149https://www.scopus.com/inward/record.uri?eid=2-s2.0-85186073548&doi=10.1088%2f1475-7516%2f2024%2f02%2f039&partnerID=40&md5=1e38bd8c4942c5b1204ce97d20e1d200reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/AEI//CEX2020-001007-SJournal of Cosmology and Astroparticle Physicshttps://doi.org/10.1088/1475-7516/2024/02/039Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3831492026-05-22T06:33:51Z
dc.title.none.fl_str_mv Primordial gravitational waves in non-minimally coupled chromo-natural inflation
title Primordial gravitational waves in non-minimally coupled chromo-natural inflation
spellingShingle Primordial gravitational waves in non-minimally coupled chromo-natural inflation
Dimastrogiovanni, E.
Cosmological perturbation theory
Inflation
Inflation and CMBR theory
Primordial gravitational waves (theory)
title_short Primordial gravitational waves in non-minimally coupled chromo-natural inflation
title_full Primordial gravitational waves in non-minimally coupled chromo-natural inflation
title_fullStr Primordial gravitational waves in non-minimally coupled chromo-natural inflation
title_full_unstemmed Primordial gravitational waves in non-minimally coupled chromo-natural inflation
title_sort Primordial gravitational waves in non-minimally coupled chromo-natural inflation
dc.creator.none.fl_str_mv Dimastrogiovanni, E.
Fasiello, M.
Michelotti, M.
Pinol, L.
author Dimastrogiovanni, E.
author_facet Dimastrogiovanni, E.
Fasiello, M.
Michelotti, M.
Pinol, L.
author_role author
author2 Fasiello, M.
Michelotti, M.
Pinol, L.
author2_role author
author
author
dc.contributor.none.fl_str_mv Ministerio de Ciencia e Innovación (España)
Agencia Estatal de Investigación (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Cosmological perturbation theory
Inflation
Inflation and CMBR theory
Primordial gravitational waves (theory)
topic Cosmological perturbation theory
Inflation
Inflation and CMBR theory
Primordial gravitational waves (theory)
description We consider inflation driven by an axion-like particle coupled to an SU(2) gauge sector via a Chern-Simons term. Known as chromo-natural inflation, this scenario is in tension with CMB observations. In order to remedy this fact and preserve both the symmetries and the intriguing gravitational wave phenomenology exhibited by the model, we explore the non-minimal coupling of the axion-inflaton to the Einstein tensor. We identify regions of parameter space corresponding to a viable cosmology at CMB scales. We also highlight the possibility of a non-trivial chiral gravitational wave signal at small scales. © 2024 The Author(s)
publishDate 2024
dc.date.none.fl_str_mv 2024
2025
2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/383149
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85186073548&doi=10.1088%2f1475-7516%2f2024%2f02%2f039&partnerID=40&md5=1e38bd8c4942c5b1204ce97d20e1d200
url http://hdl.handle.net/10261/383149
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85186073548&doi=10.1088%2f1475-7516%2f2024%2f02%2f039&partnerID=40&md5=1e38bd8c4942c5b1204ce97d20e1d200
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/AEI//CEX2020-001007-S
Journal of Cosmology and Astroparticle Physics
https://doi.org/10.1088/1475-7516/2024/02/039
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv IOP Publishing
publisher.none.fl_str_mv IOP Publishing
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
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