Calculation of primordial abundances of light nuclei including a heavy sterile neutrino

We include the coupling of a heavy sterile neutrino with active neutrinos in the calculation of primordial abundances of light-nuclei. We calculate neutrino distribution functions and primordial abundances, as functions depending on a renormalization of the sterile neutrino distribution function (a)...

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Detalles Bibliográficos
Autores principales: Mosquera, Mercedes Elisa, Civitarese, Enrique Osvaldo
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 2015
Materias:
Ciencias Astronómicas
Big bang nucleosynthesis
Neutrino masses from cosmology
Neutrino properties
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/100785
https://ri.conicet.gov.ar/11336/53475
http://iopscience.iop.org/article/10.1088/1475-7516/2015/08/038/meta
https://arxiv.org/abs/1411.4030
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-100785
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
Big bang nucleosynthesis
Neutrino masses from cosmology
Neutrino properties
spellingShingle Ciencias Astronómicas
Big bang nucleosynthesis
Neutrino masses from cosmology
Neutrino properties
Mosquera, Mercedes Elisa
Civitarese, Enrique Osvaldo
Calculation of primordial abundances of light nuclei including a heavy sterile neutrino
topic_facet Ciencias Astronómicas
Big bang nucleosynthesis
Neutrino masses from cosmology
Neutrino properties
description We include the coupling of a heavy sterile neutrino with active neutrinos in the calculation of primordial abundances of light-nuclei. We calculate neutrino distribution functions and primordial abundances, as functions depending on a renormalization of the sterile neutrino distribution function (a), the sterile neutrino mass (m<sub>s</sub>) and the mixing angle (φ). Using the observable data, we set constrains on these parameters, which have the values a < 0.60, sin<sup>2</sup> φ = 0.15 and mm<sub>s</sub> ≈ 4 keV, for a fixed value of the baryon to photon ratio. When the baryon to photon ratio is allowed to vary, its extracted value is in agreement with the values constrained by Planck observations and by the Wilkinson Microwave Anisotropy Probe (WMAP). It is found that the anomaly in the abundance of <sup>7</sup>Li persists, in spite of the inclusion of a heavy sterile neutrino.
format Articulo
Preprint
author Mosquera, Mercedes Elisa
Civitarese, Enrique Osvaldo
author_facet Mosquera, Mercedes Elisa
Civitarese, Enrique Osvaldo
author_sort Mosquera, Mercedes Elisa
title Calculation of primordial abundances of light nuclei including a heavy sterile neutrino
title_short Calculation of primordial abundances of light nuclei including a heavy sterile neutrino
title_full Calculation of primordial abundances of light nuclei including a heavy sterile neutrino
title_fullStr Calculation of primordial abundances of light nuclei including a heavy sterile neutrino
title_full_unstemmed Calculation of primordial abundances of light nuclei including a heavy sterile neutrino
title_sort calculation of primordial abundances of light nuclei including a heavy sterile neutrino
publishDate 2015
url http://sedici.unlp.edu.ar/handle/10915/100785
https://ri.conicet.gov.ar/11336/53475
http://iopscience.iop.org/article/10.1088/1475-7516/2015/08/038/meta
https://arxiv.org/abs/1411.4030
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AT civitareseenriqueosvaldo calculationofprimordialabundancesoflightnucleiincludingaheavysterileneutrino
bdutipo_str Repositorios
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