While three flavors of “active” neutrinos are consistent with mixing angle results within error bars, there are anomalies may be hints of physics beyond the standard model that can accommodate a fourth mostly “sterile" neutrino species with an eV-scale mass and a mixing angle with active neutrinos of order ?0 ' 0.1. We describe a scenario with eV-scale sterile neutrinos that have self-interactions via a new gauge vector boson, a “secret” mediator f. We show that their production in the early Universe via mixing with active neutrinos is consistent with Big Bang Nucleosynthesis and free-streaming constraints in the Cosmic Microwave Background epoch. For Mf = 4 - 8 keV and sterile neutrino coupling gs = 10-4, we find that resonant interactions of diffuse supernova neutrinos with relic sterile neutrinos in transit to the Earth would cause spectral dips in the neutrino flux. We illustrate the corresponding (anti-)neutrino event distributions as a function of energy in the DUNE (Hyper-Kamiokande) detector.
|Original language||English (US)|
|Journal||Proceedings of Science|
|State||Published - Apr 15 2021|
|Event||40th International Conference on High Energy Physics, ICHEP 2020 - Virtual, Prague, Czech Republic|
Duration: Jul 28 2020 → Aug 6 2020
ASJC Scopus subject areas