Feb 18 – 26, 2021
Europe/Rome timezone

Constraining sterile neutrinos by core-collapse supernovae with multiple detectors

Feb 19, 2021, 10:00 AM
Room 2 (https://unipd.link/NeuTel-ParallelRoom2)

Room 2


Parallel Contributed Talk Neutrino Telescopes and Multimessenger Low Energy Neutrinos


Jian Tang (Sun Yat-Sen University)


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 $\bar{\nu}_\mu\to\bar{\nu}_e$ 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 $\nu_e$ 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 $\sin^22\theta_{14}$-$\Delta m_{41}^2$ plane.

Primary author

Jian Tang (Sun Yat-Sen University)

Presentation materials