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Gravitational waves from neutrino mass and dark matter genesis
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We introduce a model in which the genesis of dark matter (DM) and neutrino masses is associated with a first order phase transition of a scalar singlet field. During the phase transition a source right-handed neutrino (RHN) acquires a spacetime-dependent mass dynamically, a small fraction of which is converted via resonant oscillations into a very weakly mixed dark RHN which decays to a dark matter RHN with the observed relic abundance. Neutrino masses are generated via a traditional two RHN type-I seesaw between a fourth RHN and the source neutrino. The gravitational waves produced during the phase transition have a peak frequency that increases with the DM mass, and are detectable at future gravitational wave interferometers for DM masses above ~ 1 MeV. Since the source RHNs are heavier than the electroweak scale, successful leptogenesis is also attainable.
Forward citations
Cited by 2 Pith papers
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Density matrix calculation of the dark matter abundance in the Higgs induced right-handed neutrino mixing model
Solving the density matrix equation shows the Landau-Zener approximation overestimates the Higgs-induced right-handed neutrino dark matter abundance by many orders of magnitude, changing the predicted dark matter mass range.
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Non-adiabatic transitions in the density matrix formalism
The paper derives a density-matrix perturbation formula for two-state non-adiabatic transitions that reproduces the Landau-Zener result only to first order.
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