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dc.contributor.author
Mosquera, Mercedes Elisa
dc.contributor.author
Civitarese, Enrique Osvaldo
dc.date.available
2018-07-30T19:32:16Z
dc.date.issued
2015-08
dc.identifier.citation
Mosquera, Mercedes Elisa; Civitarese, Enrique Osvaldo; Calculation of primordial abundances of light nuclei including a heavy sterile neutrino; IOP Publishing; Journal of Cosmology and Astroparticle Physics; 2015; 8; 8-2015; 1-14
dc.identifier.issn
1475-7516
dc.identifier.uri
http://hdl.handle.net/11336/53475
dc.description.abstract
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 (ms) and the mixing angle (φ). Using the observable data, we set constrains on these parameters, which have the values a < 0.4, sin2 φ ≈ 0.12-0.39 and ms < 7 keV at 1σ level, 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 7Li persists, in spite of the inclusion of a heavy sterile neutrino.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
IOP Publishing
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Big Bang Nucleosynthesis
dc.subject
Neutrino Masses from Cosmology
dc.subject
Neutrino Properties
dc.subject.classification
Astronomía
dc.subject.classification
Ciencias Físicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Calculation of primordial abundances of light nuclei including a heavy sterile neutrino
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-07-30T13:37:09Z
dc.journal.volume
2015
dc.journal.number
8
dc.journal.pagination
1-14
dc.journal.pais
Reino Unido
dc.journal.ciudad
Bristol
dc.description.fil
Fil: Mosquera, Mercedes Elisa. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Civitarese, Enrique Osvaldo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina
dc.journal.title
Journal of Cosmology and Astroparticle Physics
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1088/1475-7516/2015/08/038
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.1088/1475-7516/2015/08/038/meta
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/1411.4030
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