Constraining sterile neutrinos by core-collapse supernovae with multiple detectors

Abstract

The eV-scale sterile neutrino has been proposed to explain some anomalous results in experiments, such as the deficit of reactor neutrino fluxes and the excess of νµ → νe in LSND. This hypothesis can be tested by future core-collapse supernova neutrino detection independently since the active-sterile mixing scheme affects the flavor conversion of neutrinos inside the supernova. In this work, we compute the predicted supernova neutrino events in future detectors -DUNE, Hyper-K, and JUNO -for neutrinos emitted during the neutronization burst phase when the luminosity of ν e dominates the other flavors. We find that for a supernova occurring within 10 kpc, the difference in the event numbers with and without sterile neutrinos allows to exclude the sterile neutrino hypothesis at more than 99% confidence level robustly. The derived constraints on sterile neutrinos mixing parameters are comparably better than the results from cosmology and on-going or proposed reactor experiments by more than two orders of magnitude in the sin 2 2θ 14 -∆m 2 41 plane.

Dark matter, supernova neutrinos and other backgrounds in direct dark matter searches. The ANDES laboratory prospects

“…P H ( PH ) and P L ( PL ) are the neutrino (antineutrino) crossing probabilities for the H and L resonances respectively, and P S stands for the probability of crossing the S-resonance (see refs. 46,47 for details).…”

“…For h s = 0, there is no sterile neutrino present in the neutrinosphere (F 0 νs = 0). The presence of initial sterile neutrinos in the SN is then indicated by taken h s = 0, thus modifying the fluxes 46,47 (see Eqs. ( 16)).…”

“…40,41 In the context of supernovae, several authors have already analysed the effects of the inclusion of a sterile flavor and its oscillations upon the fraction of free neutrons, the baryonic density, the electron fraction of the material, and nucleosynthesis processes. 26,[42][43][44][45][46][47] At present, there are several operationally dark matter detectors, 20,[48][49][50][51][52][53][54][55][56] which should also be able to detect neutrinos from the next galactic explosion. The currently running detectors are located in the Northern Hemisphere, however there are two projects to install detectors in the South.…”

Sensitivity of Next-Generation Neutrino Detectors to the Observation of Earth Matter Effects on Supernova Neutrinos in the Framework of Invisible Neutrino Decay

“…According to Ref. [151], the neutrino fluence (time-integrated neutrino spectra) at Earth can be computed as…”

“…Since it was not possible to obtain such information for the scenario C 1 , we get by setting α ν = 3 for all flavors, as in Ref. [151]. Also, the totally time-integrated neutrino flux is unknown in Ref.…”