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

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

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Hernández Gamazo, Pilar; Kekic, Marija; López Pavón, Jacobo
Aquest document és un/a article, creat/da en: 2014
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.

    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
http://dx.doi.org/10.1103/PhysRevD.90.065033
distribuït sota llicència Creative Commons de Reconeixement-NoComercial 3.0 No adaptada

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