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Sterile Neutrino Shape-shifting Caused by Dark Matter
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Sterile Neutrino Shape-shifting Caused by Dark Matter
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Light sterile neutrinos with a mass of $\sim 1$ eV continue to be interesting due to multiple hints from terrestrial experiments. This simple hypothesis suffers from strong astrophysical constraints, in particular from the early universe as well as solar neutrinos. We develop a cosmologically viable proposal consistent with the terrestrial hints, as well as solar constraints, by sourcing the sterile neutrino's mass from ordinary matter via an ultralight scalar $\phi$ which can also be the dark matter. In this scenario, the experimentally implied $\sim 1$ eV sterile neutrino mass is a local value and changes throughout spacetime.
Forward citations
Cited by 3 Pith papers
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Shedding light on dark matter spikes through refractive neutrino masses
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Ultralight scalar dark matter amplifies the lepton-flavor-violating muon-to-positron conversion rate via an effective Majorana mass m_μe, yielding new constraints on flavor-off-diagonal neutrino couplings from SINDRUM...
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Probing long-range $L_e-L_\mu$ forces with supernova neutronization burst neutrinos
DUNE can use a nearby supernova neutronization burst to constrain ultralight Le−Lμ gauge forces via distortions of the electron-neutrino survival probability.
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