SUPERNOVA NEUTRINO ENERGY-SPECTRA AND THE MSW EFFECT

The distortions in the thermal energy spectra for neutrinos produced i n a supernova when a resonant oscillation, MSW effect, occurs are dete rmined. In order to show this effect for some relevant and representat ive examples of unified gauge models, we have chosen SO(10), and SU(5) (SUSY), SO(10)(SUSY) with a particular scheme for fermion masses (DHR model). The analysis has been performed for two choices of neutrinos p arameters, predicted by the above models, and capable to explain the s olar neutrino problem. In both cases one observes a strong distortion in the electron neutrino energy spectrum. This effect, computed for a wide range of SO(10)(SUSY) models has produced the same results of the previous supersymmetric ones.