VERY LOW ENERGY SUPERNOVAE FROM NEUTRINO MASS LOSS

Low-Energy Neutrino Physics and Neutrino Mass

Mass loss and very low-metallicity stars

Mass loss plays a dominant role in the evolution of massive stars at solar metallicity. After discussing different mass loss mechanisms and their metallicity dependence, we present the possibility of strong mass loss at very low metallicity. Our models at Z = 10−8 show that stars more massive than about 60 M⊙ may lose a significant fraction of their initial mass in the red supergiant phase. Thi...

High Energy Neutrino Telescopes Detect Supernovae

We have simulated the response of a high energy neutrino telescope to the stream of low energy neutrinos produced by a supernova. The nominal threshold of such detectors is in the GeV energy range. The passage of a large flux of MeV neutrinos during a period of seconds will nevertheless be detected as an excess of single counting rates in all individual optical modules. Detectors under construc...

Neutronization Neutrino Pulses from Supernovae

We address a possible implication of the triplet majoron (TM) model for neutrino pulses from supernovae. If the v~v~-majoron coupling is ~ 0.7 X 10-3, suggested by one of the recent ~13-decay experiments, equilibration of v-species via v~v~--.%v,(v~v~), occurs on a time scale ~ 10 -4 s. Rapid equilibration followed by decay in flight via v(v~) --.9~ +X °, could dramatically enhance the probabil...

Inverted Mass Hierarchy from Scaling in the Neutrino Mass Matrix: Low and High Energy Phenomenology

Best-fit values of recent global analyzes of neutrino data imply large solar neutrino mixing, vanishing Ue3 and a non-maximal atmospheric neutrino mixing angle θ23. We show that these values emerge naturally by the hypothesis of “scaling” in the Majorana neutrino mass matrix, which states that the ratios of its elements are equal. It also predicts an inverted hierarchy for the neutrino masses. ...