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Effects of Neutrino-Ultralight Dark Matter Interaction on the Cosmic Neutrino Background
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Ultralight dark matter interacting with sterile neutrinos would modify the evolution and properties of the cosmic neutrino background through active-sterile neutrino mixing. We investigate how such an interaction would induce a redshift dependence in neutrino masses. We highlight that cosmological constraints on the sum of neutrino masses would require reinterpretation due to the effective mass generated by neutrino-dark matter interactions. Furthermore, we present an example where such interactions can alter the mass ordering of neutrinos in the early Universe, compared to what we expect today. We also address the expected changes in the event rates in a PTOLEMY-like experiment, which aims to detect the cosmic neutrino background via neutrino capture, and discuss projected constraints.
Forward citations
Cited by 4 Pith papers
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The Cosmic Neutrino Background is within Reach of Future Neutrino Telescopes
Including deep-inelastic scattering makes cosmic-ray-boosted relic neutrinos bright enough for IceCube to bound the CνB overdensity to ~100–1000, and future networks could reach the ΛCDM value.
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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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Ultralight dark matter search in a large liquid scintillator detector
A JUNO-like detector could constrain the neutrino–ultralight-dark-matter oscillation-modulation parameters to ηΔ21 < 2.5×10^-2 and ηΔ31 < 5×10^-3 at 90% CL.
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Dynamic Neutrino Mass Ordering and Its Imprint on the Diffuse Supernova Neutrino Background
A toy model where neutrino mass ordering flips with redshift reshapes the electron-neutrino part of the diffuse supernova neutrino background in an energy-dependent way, but the effect is below near-future experimental reach.
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