Effects of active–sterile neutrino mixing during primordial nucleosynthesis

Autores
Civitarese, Enrique Osvaldo; Mosquera, Mercedes Elisa; Sáez, María Manuela
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
In the present work, we discuss the effects of the inclusion of sterile–active neutrino oscillations during the production of primordial light-nuclei. We assume that the sterile neutrino mass-eigenstate might oscillate with the two lightest active neutrino mass-eigenstates, with mixing angles ϕ1 and ϕ2. We also allow a constant renormalization (represented by a parameter (ζ)) of the sterile neutrino occupation factor. Taking ζ and the mixing angles as free parameters, we have computed distribution functions of active and sterile neutrinos and primordial abundances. Using observable data we set constrains in the free parameters of the model. It is found that the data on primordial abundances are consistent with small mixing angles and with a value of ζ smaller than 0.65 at 3σ level.
Facultad de Ciencias Exactas
Facultad de Ciencias Astronómicas y Geofísicas
Materia
Física
Sterile neutrino
Neutrino mixing
Primordial nucleosysthesis
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/127046
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/127046
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repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Effects of active–sterile neutrino mixing during primordial nucleosynthesisCivitarese, Enrique OsvaldoMosquera, Mercedes ElisaSáez, María ManuelaFísicaSterile neutrinoNeutrino mixingPrimordial nucleosysthesisIn the present work, we discuss the effects of the inclusion of sterile–active neutrino oscillations during the production of primordial light-nuclei. We assume that the sterile neutrino mass-eigenstate might oscillate with the two lightest active neutrino mass-eigenstates, with mixing angles ϕ1 and ϕ2. We also allow a constant renormalization (represented by a parameter (ζ)) of the sterile neutrino occupation factor. Taking ζ and the mixing angles as free parameters, we have computed distribution functions of active and sterile neutrinos and primordial abundances. Using observable data we set constrains in the free parameters of the model. It is found that the data on primordial abundances are consistent with small mixing angles and with a value of ζ smaller than 0.65 at 3σ level.Facultad de Ciencias ExactasFacultad de Ciencias Astronómicas y Geofísicas2014info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/127046enginfo:eu-repo/semantics/altIdentifier/issn/0218-3013info:eu-repo/semantics/altIdentifier/issn/1793-6608info:eu-repo/semantics/altIdentifier/doi/10.1142/s0218301314500803info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-10-15T11:22:31Zoai:sedici.unlp.edu.ar:10915/127046Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-15 11:22:31.611SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Effects of active–sterile neutrino mixing during primordial nucleosynthesis
title Effects of active–sterile neutrino mixing during primordial nucleosynthesis
spellingShingle Effects of active–sterile neutrino mixing during primordial nucleosynthesis
Civitarese, Enrique Osvaldo
Física
Sterile neutrino
Neutrino mixing
Primordial nucleosysthesis
title_short Effects of active–sterile neutrino mixing during primordial nucleosynthesis
title_full Effects of active–sterile neutrino mixing during primordial nucleosynthesis
title_fullStr Effects of active–sterile neutrino mixing during primordial nucleosynthesis
title_full_unstemmed Effects of active–sterile neutrino mixing during primordial nucleosynthesis
title_sort Effects of active–sterile neutrino mixing during primordial nucleosynthesis
dc.creator.none.fl_str_mv Civitarese, Enrique Osvaldo
Mosquera, Mercedes Elisa
Sáez, María Manuela
author Civitarese, Enrique Osvaldo
author_facet Civitarese, Enrique Osvaldo
Mosquera, Mercedes Elisa
Sáez, María Manuela
author_role author
author2 Mosquera, Mercedes Elisa
Sáez, María Manuela
author2_role author
author
dc.subject.none.fl_str_mv Física
Sterile neutrino
Neutrino mixing
Primordial nucleosysthesis
topic Física
Sterile neutrino
Neutrino mixing
Primordial nucleosysthesis
dc.description.none.fl_txt_mv In the present work, we discuss the effects of the inclusion of sterile–active neutrino oscillations during the production of primordial light-nuclei. We assume that the sterile neutrino mass-eigenstate might oscillate with the two lightest active neutrino mass-eigenstates, with mixing angles ϕ1 and ϕ2. We also allow a constant renormalization (represented by a parameter (ζ)) of the sterile neutrino occupation factor. Taking ζ and the mixing angles as free parameters, we have computed distribution functions of active and sterile neutrinos and primordial abundances. Using observable data we set constrains in the free parameters of the model. It is found that the data on primordial abundances are consistent with small mixing angles and with a value of ζ smaller than 0.65 at 3σ level.
Facultad de Ciencias Exactas
Facultad de Ciencias Astronómicas y Geofísicas
description In the present work, we discuss the effects of the inclusion of sterile–active neutrino oscillations during the production of primordial light-nuclei. We assume that the sterile neutrino mass-eigenstate might oscillate with the two lightest active neutrino mass-eigenstates, with mixing angles ϕ1 and ϕ2. We also allow a constant renormalization (represented by a parameter (ζ)) of the sterile neutrino occupation factor. Taking ζ and the mixing angles as free parameters, we have computed distribution functions of active and sterile neutrinos and primordial abundances. Using observable data we set constrains in the free parameters of the model. It is found that the data on primordial abundances are consistent with small mixing angles and with a value of ζ smaller than 0.65 at 3σ level.
publishDate 2014
dc.date.none.fl_str_mv 2014
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/127046
url http://sedici.unlp.edu.ar/handle/10915/127046
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0218-3013
info:eu-repo/semantics/altIdentifier/issn/1793-6608
info:eu-repo/semantics/altIdentifier/doi/10.1142/s0218301314500803
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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score 13.22299

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