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Inverse Seesaw Model with a Modular $S^{}_4$ Symmetry: Lepton Flavor Mixing and Warm Dark Matter
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abstract
In this paper, we present a systematic investigation on simple inverse seesaw models for neutrino masses and flavor mixing based on the modular $S^{}_4$ symmetry. Two right-handed neutrinos and three extra fermion singlets are introduced to account for light neutrino masses through the inverse seesaw mechanism, and to provide a keV-mass sterile neutrino as the candidate for warm dark matter in our Universe. Considering all possible modular forms with weights no larger than four, we obtain twelve models, among which we find one is in excellent agreement with the observed lepton mass spectra and flavor mixing. Moreover, we explore the allowed range of the sterile neutrino mass and mixing angles, by taking into account the direct search of $X$-ray line and the Lyman-$\alpha$ observations. The model predictions for neutrino mixing parameters and the dark matter abundance will be readily testable in future neutrino oscillation experiments and cosmological observations.
Forward citations
Cited by 4 Pith papers
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Leptonic Flavor from Modular $A_4$: UV Mediators and SMEFT Realizations
This paper classifies lepton-coupled UV mediators under modular A4 symmetry and derives experimental lower bounds on their masses from lepton flavor observables.
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Froggatt-Nielsen like mechanism in the framework of Modular Symmetry for Neutrino Mass, Mixing and Leptogenesis
A T' modular-symmetry model with a 'weighton' scalar reproduces neutrino oscillation data within 3σ and gives predictions for neutrinoless double beta decay and leptogenesis.
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Neutrino mass genesis in Scoto-Inverse Seesaw with Modular $A_4$
The modular A4 scotogenic inverse seesaw model can fit normal-ordering neutrino data with a TeV-scale fermion dark matter candidate, but the stated parameter choice m_etaR = m_etaI makes the radiative neutrino mass vanish.
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Matter-antimatter asymmetry in minimal inverse seesaw framework with $A_4$ modular symmetry
An A4 modular inverse seesaw model with a U(1) B-L Z' fits neutrino data and produces the observed baryon asymmetry via resonant leptogenesis.
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