Constraining sterile neutrinos by core-collapse supernovae with multiple detectors
J. Tang, T.C. Wang, M.-R. Wu 2020 JCAP 10 038The eV-scale sterile neutrino has been proposed to explain some anomalous results in experiments, extit{such as} the deficit of reactor neutrino fluxes and the excess of ar{ u}_mu oar{ u}_eνˉμ→νˉe 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 u_eνe 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\%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^22 heta_{14}sin22θ14-Delta m_{41}^2Δm412 plane.