Neutrino oscillations in MHD supernova explosions

Details Neutrino oscillations in MHD supernova explosions Neutrino oscillations in MHD supernova explosions

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010jphcs.203a2128k&link_type=abstract

Journal of Physics: Conference Series, Volume 203, Issue 1, pp. 012128 (2010).

Physics

Scientific paper

We calculate the neutrino oscillations numerically in magnetohydrodynamic (MHD) explosion models to see how asphericity has impacts on neutrino spectra. Magneto-driven explosions are one of the most attracting scenarios for producing large scale departures from spherical symmetric geometry, that are reported by many observational data. We find that the event rates at Super-Kamiokande (SK) seen from the polar direction (e.g., the rotational axis of the supernovae) decrease when the shock wave is propagating through H-resonance. In addition, we find that L-resonance in this situation becomes non-adiabatic, and the effect of L-resonance appears in the neutrino signal, because the MHD shock can propagate to the stellar surface without shock-stall after core bounce, and the shock reaches the L-resonance at earlier stage than the conventional spherical supernova explosion models. Our results suggest that we may obtain the observational signatures of the two resonances in SK for Galactic supernova.

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