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Bounds on light sterile neutrino mass and mixing from cosmology and laboratory searches

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Bounds on light sterile neutrino mass and mixing from cosmology and laboratory searches

dc.contributor.author	Hagstotz, Steffen
dc.contributor.author	Fernández de Salas, Pablo
dc.contributor.author	Gariazzo, Stefano
dc.contributor.author	Pastor Carpi, Sergio
dc.contributor.author	Gerbino, Martina
dc.contributor.author	Lattanzi, Massimiliano
dc.contributor.author	Vagnozzi, Sunny
dc.contributor.author	Freese, Katherine
dc.date.accessioned	2022-05-03T14:15:11Z
dc.date.available	2022-05-03T14:15:11Z
dc.date.issued	2021
dc.identifier.citation	Hagstotz, Steffen Fernández de Salas, Pablo Gariazzo, Stefano Pastor Carpi, Sergio Gerbino, Martina Lattanzi, Massimiliano Vagnozzi, Sunny Freese, Katherine 2021 Bounds on light sterile neutrino mass and mixing from cosmology and laboratory searches Physical Review D 104 12 123524-1 123524-20
dc.identifier.uri	https://hdl.handle.net/10550/82539
dc.description.abstract	We present a consistent framework to set limits on properties of light sterile neutrinos coupled to all three active neutrinos using a combination of the latest cosmological data and terrestrial measurements from oscillations, β-decay, and neutrinoless double-β-decay (0νββ) experiments. We directly constrain the full 3+1 active-sterile mixing matrix elements \|U_α4\|^2, with α∈(e,μ,τ), and the mass-squared splitting Δm^2_41≡m^2_4−m^2_1. We find that results for a 3+1 case differ from previously studied 1+1 scenarios where the sterile is coupled to only one of the neutrinos, which is largely explained by parameter space volume effects. Limits on the mass splitting and the mixing matrix elements are currently dominated by the cosmological datasets. The exact results are slightly prior dependent, but we reliably find all matrix elements to be constrained below \|U_α4\|^2≲10^−3. Short-baseline neutrino oscillation hints in favor of eV-scale sterile neutrinos are in serious tension with these bounds, irrespective of prior assumptions. We also translate the bounds from the cosmological analysis into constraints on the parameters probed by laboratory searches, such as mβ or mββ, the effective mass parameters probed by β-decay and 0νββ searches, respectively. When allowing for mixing with a light sterile neutrino, cosmology leads to upper bounds of mβ<0.09 eV and mββ<0.07 eV at 95% CL, more stringent than the limits from current laboratory experiments.
dc.language.iso	eng
dc.relation.ispartof	Physical Review D, 2021, vol. 104, num. 12, p. 123524-1-123524-20
dc.subject	Cosmologia
dc.subject	Astrofísica
dc.title	Bounds on light sterile neutrino mass and mixing from cosmology and laboratory searches
dc.type	journal article	es_ES
dc.date.updated	2022-05-03T14:15:12Z
dc.identifier.doi	10.1103/PhysRevD.104.123524
dc.identifier.idgrec	152257
dc.rights.accessRights	open access	es_ES