Speaker
Description
The presence of neutrino interactions beyond the standard model can modify the neutrino propagation in matter. In this work, we explore the impact of a flavor-conserving scalar-mediated non-standard neutrino interaction on the neutrino flux emerging from core-collapse supernovae. Such interactions involving muon and tau neutrinos can invert the neutrino mass eigenstate in which three neutrino flavor states are produced inside the supernova core, resulting in a significant modification of the electron neutrino flux from the supernova reaching the Earth. In the context of the DUNE experiment, we estimate the number of supernova neutrino events in the presence of scalar non-standard neutrino interaction and contrast with the case without scalar-mediated non-standard interactions. Our results indicate that such scalar interactions introduce a new degeneracy in the measurement of neutrino mass ordering from supernova neutrinos. We show how the electron antineutrino event distribution in Hyper-Kamiokande experiment can help resolve the degeneracy between a model with new scalar interactions for normal ordered neutrino masses and the standard model with inverted mass ordering. We also explore the possible impact of such scalar-mediated interaction in the diffuse supernova neutrino background.