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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