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dc.date.accessioned 2020-07-15T18:10:55Z
dc.date.available 2020-07-15T18:10:55Z
dc.date.issued 2015-08
dc.identifier.uri http://sedici.unlp.edu.ar/handle/10915/100785
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 < 0.60, sin2 φ = 0.15 and mms ≈ 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 7Li persists, in spite of the inclusion of a heavy sterile neutrino.
dc.format.extent 1-14 es
dc.language en es
dc.subject Big bang nucleosynthesis es
dc.subject Neutrino masses from cosmology es
dc.subject Neutrino properties es
dc.title Calculation of primordial abundances of light nuclei including a heavy sterile neutrino en
dc.type Articulo es
sedici.identifier.uri https://ri.conicet.gov.ar/11336/53475 es
sedici.identifier.uri http://iopscience.iop.org/article/10.1088/1475-7516/2015/08/038/meta es
sedici.identifier.uri https://arxiv.org/abs/1411.4030 es
sedici.identifier.other https://doi.org/10.1088/1475-7516/2015/08/038 es
sedici.identifier.other arXiv:1411.4030 es
sedici.identifier.other hdl:11336/53475 es
sedici.identifier.issn 1475-7516 es
sedici.creator.person Mosquera, Mercedes Elisa es
sedici.creator.person Civitarese, Enrique Osvaldo es
sedici.subject.materias Ciencias Astronómicas es
sedici.description.fulltext true es
mods.originInfo.place Facultad de Ciencias Astronómicas y Geofísicas es
mods.originInfo.place Facultad de Ciencias Exactas es
sedici.subtype Preprint es
sedici.rights.license Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
sedici.rights.uri http://creativecommons.org/licenses/by-nc-sa/4.0/
sedici.description.peerReview peer-review es
sedici.relation.journalTitle Journal of Cosmology and Astroparticle Physics es
sedici.relation.journalVolumeAndIssue vol. 2015, no. 8 es


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Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) Excepto donde se diga explícitamente, este item se publica bajo la siguiente licencia Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)