How to relax the cosmological neutrino mass bound

We study the impact of non-standard momentum distributions of cosmic neutrinos on the anisotropy spectrum of the cosmic microwave background and the matter power spectrum of the large scale structure. We show that the neutrino distribution has almost no unique observable imprint, as it is almost ent...

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Authors: Oldengott, I.M., Barenboim, Gabriela, Kahlen, S., Salvado, Jordi, Schwarz, D.J.
Format: article
Status:Versión enviada para evaluación y publicación
Publication Date:2019
Country:España
Institution:Consejo Superior de Investigaciones Científicas (CSIC)
Repository:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/208528
Online Access:http://hdl.handle.net/10261/208528
Access Level:Open access
Keyword:neutrino masses from cosmology
cosmological neutrinos
Cosmological parameters from CMBR
Cosmological parameters from LSS
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spelling How to relax the cosmological neutrino mass boundOldengott, I.M.Barenboim, GabrielaKahlen, S.Salvado, JordiSchwarz, D.J.neutrino masses from cosmologycosmological neutrinosCosmological parameters from CMBRCosmological parameters from LSSWe study the impact of non-standard momentum distributions of cosmic neutrinos on the anisotropy spectrum of the cosmic microwave background and the matter power spectrum of the large scale structure. We show that the neutrino distribution has almost no unique observable imprint, as it is almost entirely degenerate with the effective number of neutrino flavours, N, and the neutrino mass, m. Performing a Markov chain Monte Carlo analysis with current cosmological data, we demonstrate that the neutrino mass bound heavily depends on the assumed momentum distribution of relic neutrinos. The message of this work is simple and has to our knowledge not been pointed out clearly before: cosmology allows that neutrinos have larger masses if their average momentum is larger than that of a perfectly thermal distribution. Here we provide an example in which the mass limits are relaxed by a factor of two.IOP PublishingMinisterio de Economía y Competitividad (España)Ministerio de Ciencia, Innovación y Universidades (España)European CommissionGeneralitat ValencianaConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2020202020192020info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Preprintinfo:eu-repo/semantics/submittedVersionhttp://hdl.handle.net/10261/208528reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/EC/H2020/674896info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/FIS2015-72245-EXPinfo:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/FPA2014-54459-Pinfo:eu-repo/grantAgreement/EC/H2020/690575info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/SEV-2014-0398http://dx.doi.org/10.1088/1475-7516/2019/04/049Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2085282026-05-22T06:33:51Z
dc.title.none.fl_str_mv How to relax the cosmological neutrino mass bound
title How to relax the cosmological neutrino mass bound
spellingShingle How to relax the cosmological neutrino mass bound
Oldengott, I.M.
neutrino masses from cosmology
cosmological neutrinos
Cosmological parameters from CMBR
Cosmological parameters from LSS
title_short How to relax the cosmological neutrino mass bound
title_full How to relax the cosmological neutrino mass bound
title_fullStr How to relax the cosmological neutrino mass bound
title_full_unstemmed How to relax the cosmological neutrino mass bound
title_sort How to relax the cosmological neutrino mass bound
dc.creator.none.fl_str_mv Oldengott, I.M.
Barenboim, Gabriela
Kahlen, S.
Salvado, Jordi
Schwarz, D.J.
author Oldengott, I.M.
author_facet Oldengott, I.M.
Barenboim, Gabriela
Kahlen, S.
Salvado, Jordi
Schwarz, D.J.
author_role author
author2 Barenboim, Gabriela
Kahlen, S.
Salvado, Jordi
Schwarz, D.J.
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Economía y Competitividad (España)
Ministerio de Ciencia, Innovación y Universidades (España)
European Commission
Generalitat Valenciana
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv neutrino masses from cosmology
cosmological neutrinos
Cosmological parameters from CMBR
Cosmological parameters from LSS
topic neutrino masses from cosmology
cosmological neutrinos
Cosmological parameters from CMBR
Cosmological parameters from LSS
description We study the impact of non-standard momentum distributions of cosmic neutrinos on the anisotropy spectrum of the cosmic microwave background and the matter power spectrum of the large scale structure. We show that the neutrino distribution has almost no unique observable imprint, as it is almost entirely degenerate with the effective number of neutrino flavours, N, and the neutrino mass, m. Performing a Markov chain Monte Carlo analysis with current cosmological data, we demonstrate that the neutrino mass bound heavily depends on the assumed momentum distribution of relic neutrinos. The message of this work is simple and has to our knowledge not been pointed out clearly before: cosmology allows that neutrinos have larger masses if their average momentum is larger than that of a perfectly thermal distribution. Here we provide an example in which the mass limits are relaxed by a factor of two.
publishDate 2019
dc.date.none.fl_str_mv 2019
2020
2020
2020
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Preprint
info:eu-repo/semantics/submittedVersion
format article
status_str submittedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/208528
url http://hdl.handle.net/10261/208528
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
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#PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/EC/H2020/674896
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/FIS2015-72245-EXP
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/FPA2014-54459-P
info:eu-repo/grantAgreement/EC/H2020/690575
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/SEV-2014-0398
http://dx.doi.org/10.1088/1475-7516/2019/04/049
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
repository.name.fl_str_mv
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