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N_eff in low-scale seesaw models versus the lightest neutrino mass

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dc.contributor.author	Hernández Gamazo, Pilar
dc.contributor.author	Kekic, Marija
dc.contributor.author	López Pavón, Jacobo
dc.date.accessioned	2015-04-23T12:07:22Z
dc.date.available	2015-04-23T12:07:22Z
dc.date.issued	2014
dc.identifier.uri	http://hdl.handle.net/10550/43327
dc.description.abstract	We evaluate the contribution to N_eff of the extra sterile states in low-scale type I seesaw models (with three extra sterile states). We explore the full parameter space and find that at least two of the heavy states always reach thermalization in the early Universe, while the third one might not thermalize provided the lightest neutrino mass is below O(10(-3) eV). Constraints from cosmology therefore severely restrict the spectra of heavy states in the range 1 eV-100 MeV. The implications for neutrinoless double beta decay are also discussed.
dc.language.iso	eng
dc.relation.ispartof	Physical Review D, 2014, vol. 90, num. 6, p. 065033
dc.rights.uri	info:eu-repo/semantics/openAccess
dc.source	Hernández Gamazo, Pilar Kekic, Marija López Pavón, Jacobo 2014 N_eff in low-scale seesaw models versus the lightest neutrino mass Physical Review D 90 6 065033
dc.subject	Física
dc.title	N_eff in low-scale seesaw models versus the lightest neutrino mass
dc.type	info:eu-repo/semantics/article
dc.date.updated	2015-04-23T12:07:22Z
dc.identifier.doi	http://dx.doi.org/10.1103/PhysRevD.90.065033
dc.identifier.idgrec	100824