Effects of active–sterile neutrino mixing during primordial nucleosynthesis

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...

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Detalles Bibliográficos
Autores principales: Civitarese, Enrique Osvaldo, Mosquera, Mercedes Elisa, Sáez, María Manuela
Formato: Articulo
Lenguaje:Inglés
Publicado: 2014
Materias:
Física
Sterile neutrino
Neutrino mixing
Primordial nucleosysthesis
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/127046
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-127046
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Sterile neutrino
Neutrino mixing
Primordial nucleosysthesis
spellingShingle Física
Sterile neutrino
Neutrino mixing
Primordial nucleosysthesis
Civitarese, Enrique Osvaldo
Mosquera, Mercedes Elisa
Sáez, María Manuela
Effects of active–sterile neutrino mixing during primordial nucleosynthesis
topic_facet Física
Sterile neutrino
Neutrino mixing
Primordial nucleosysthesis
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.
format Articulo
Articulo
author Civitarese, Enrique Osvaldo
Mosquera, Mercedes Elisa
Sáez, María Manuela
author_facet Civitarese, Enrique Osvaldo
Mosquera, Mercedes Elisa
Sáez, María Manuela
author_sort Civitarese, Enrique Osvaldo
title Effects of active–sterile neutrino mixing during primordial nucleosynthesis
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
publishDate 2014
url http://sedici.unlp.edu.ar/handle/10915/127046
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AT mosqueramercedeselisa effectsofactivesterileneutrinomixingduringprimordialnucleosynthesis
AT saezmariamanuela effectsofactivesterileneutrinomixingduringprimordialnucleosynthesis
bdutipo_str Repositorios
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