Speaker
Description
We present a comprehensive analysis of nonstandard neutrino interactions with the dark sector in an effective field theory framework. We implement the full catalog of constraints on the parameter space of the neutrino–dark matter (DM)/mediator couplings and masses, including cosmological and astrophysical bounds coming from Big Bang Nucleosynthesis, Cosmic Microwave Background, DM and neutrino self-interactions, DM collisional damping, thermal relic density, and SN1987A, as well as laboratory constraints from double-beta decays, rare meson, tau and Z boson decays. We find that most of the benchmarks in the DM mass-coupling plane adopted in previous studies to get an observable neutrino-DM interaction effect are actually ruled out by a combination of the above-mentioned constraints, especially the laboratory ones which are robust against any astrophysical uncertainty.
To illustrate the practical consequences of our new results, we take the galactic supernova neutrinos in the MeV energy range as a concrete example and highlight the difficulties in finding any observable effect of neutrino-DM interactions. Finally, we identify new benchmark points potentially promising for future observational prospects of the attenuation of the galactic supernova neutrino flux, compute the full set of cascade equations and sky maps for different DM density profiles in the Galaxy, and comment on their implications for the detection prospects in future large-volume neutrino experiments such as DUNE, Hyper-K and JUNO.
