A new possibility of the fast neutrino-flavor conversion in the pre-shock region of core-collapse supernova

28 Sep 2019 Morinaga Taiki Nagakura Hiroki Kato Chinami Yamada Shoichi

We make a strong case that the fast neutrino-flavor conversion, one of the collective flavor oscillation modes, commonly occurs in core-collapse supernovae (CCSNe). It is confirmed in the numerical data obtained in realistic simulations of CCSNe but the argument is much more generic and applicable universally: the coherent neutrino-nucleus scattering makes the electron lepton number (ELN) change signs at some inward direction and trigger the flavor conversion in the outward direction in the pre-shock region... (read more)

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