Dresden 2013 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 21: Nukleare Astrophysik
HK 21.1: Group Report
Monday, March 4, 2013, 16:45–17:15, HSZ-403
Neutrino Oscillations in Core-collapse Supernovae — •Meng-Ru Wu1,2, Lutz Huther1, Tobias Fischer1,3, Gabriel Martinez-Pinedo1,3, and Yong-Zhong Qian2 — 1TU Darmstadt, Darmstadt — 2University of Minnesota, Minneapolis, USA — 3GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt
Neutrino oscillations play an important role in determining the spectra of neutrinos emitted from core-collapse supernova and must be considered in the analysis of supernova neutrino detection to understand both the supernova dynamics and the unknown neutrino mass hierarchy. We have studied neutrino oscillations in supernovae using the emission spectra of neutrinos and the dynamically evolving supernova density profile from a state-of-the-art supernova model. We find that in this model, different regions of neutrino oscillations are well separated. Collective neutrino oscillations happen at the innermost part such that the spectra of electron neutrinos and mu/tau neutrinos are partly swapped for the first few seconds in the cooling phase. Then, the high and low MSW resonances that occur after collective oscillations are both adiabatic. Using these results, we find that in this model, neutrino oscillations have little effect on the nucleosynthesis in the neutrino-driven winds. However, the detection of such a signal could possibly allow us to differentiate the neutrino mass hierarchy and to extract the shock revival time.