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Sterile neutrino models and nonminimal cosmologies

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Sterile neutrino models and nonminimal cosmologies

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dc.contributor.author	Giusarma, Elena
dc.contributor.author	Archidiacono, Maria
dc.contributor.author	de Putter, Roland
dc.contributor.author	Melchiorri, Alessandro
dc.contributor.author	Mena Requejo, Olga
dc.date.accessioned	2014-07-24T11:15:27Z
dc.date.available	2014-07-24T11:15:27Z
dc.date.issued	2012
dc.identifier.citation	Giusarma, Elena Archidiacono, Maria de Putter, Roland Melchiorri, Alessandro Mena Requejo, Olga 2012 Sterile neutrino models and nonminimal cosmologies Physical Review D 85 8 083522
dc.identifier.uri	http://hdl.handle.net/10550/37306
dc.description.abstract	Cosmological measurements are affected by the energy density of massive neutrinos. We extend here a recent analysis of current cosmological data to nonminimal cosmologies. Several possible scenarios are examined: a constant w not equal -1 dark energy equation of state, a nonflat universe, a time-varying dark energy component and coupled dark matter-dark energy universes or modified gravity scenarios. When considering cosmological data only, (3 + 2) massive neutrino models with similar to 0.5 eV sterile species are allowed at 95% confidence level. This scenario has been shown to reconcile reactor, LSND and MiniBooNE positive signals with null results from other searches. Big bang nucleosynthesis bounds could compromise the viability of (3 + 2) models if the two sterile species are fully thermalized states at decoupling.
dc.language.iso	eng
dc.relation.ispartof	Physical Review D, 2012, vol. 85, num. 8, p. 083522
dc.subject	Física
dc.title	Sterile neutrino models and nonminimal cosmologies
dc.type	journal article	es_ES
dc.date.updated	2014-07-24T11:15:27Z
dc.identifier.doi	10.1103/PhysRevD.85.083522
dc.identifier.idgrec	078135
dc.rights.accessRights	open access	es_ES