Resolving ambiguities in the neutrino mass-flavour spectrum from supernova neutrinos

Abstract

We analyze the neutrino conversions inside a supernova in the 3ν mixing scheme, and their effects on the neutrino spectra observed at the earth. We find that the observations of the energy spectra of neutrinos from a future galactic supernova may enable us to identify the solar neutrino solution, to determine the sign of Δm_32², and to probe the mixing matrix element |U_e3|² to values as low as 10⁻⁴ − 10⁻³.