Neutrino mass ordering

Determine the ordering of the neutrino mass eigenstates (normal or inverted) by analyzing observables sensitive to mass ordering, including the time- and energy-dependent profiles of supernova neutrino spectra that depend on neutrino mixing parameters and the mass ordering.

Background

Core-collapse supernovae produce neutrinos whose spectra and temporal evolution are modified by matter effects and collective oscillations. The signatures imprinted on the neutrino burst depend on the values of mixing parameters and the mass ordering.

A precise detection of a Galactic supernova neutrino signal by large-volume detectors could resolve the mass ordering through characteristic spectral and temporal features.