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

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arxiv 1909.13131 v1 pith:PZIYPEVK submitted 2019-09-28 astro-ph.HE

Taiki Morinaga , Hiroki Nagakura , Chinami Kato , Shoichi Yamada This is my paper
classification astro-ph.HE
keywords conversionccsneflavorcore-collapsedirectionfastneutrino-flavorpre-shock
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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. Although the ELN crossing is tiny and that is why it has eluded recognition so far, it is still large enough to induce the flavor conversion. Our findings will have an important observational consequences for CCSNe neutrinos.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Solar-System Abundances of $p$-Nuclides Probe Collective Neutrino Oscillations in Supernovae

    hep-ph 2026-07 conditional novelty 6.0 of 10

    Nearby neutrino flavor conversion in a supernova can boost νp-process yields of p-nuclides like 92Mo and 92Nb by up to two orders of magnitude, matching solar abundances when conversion starts within ~10 km of the pro...

  2. Electron-neutrino lepton number crossings: Variations with the supernova core physics

    astro-ph.HE 2025-07 conditional novelty 6.0 of 10

    In a suite of 12 supernova models, electron-neutrino lepton number crossings appear at larger radii when proto-neutron star convection is included and at smaller radii when muon production is included.

  3. Comparative Testing of Subgrid Models for Fast Neutrino Flavor Conversions in Core-collapse Supernova Simulations

    astro-ph.HE 2025-06 conditional novelty 6.0 of 10

    A 1D supernova simulation with four-species BGK subgrid modeling shows that three-species assumptions overestimate flavor conversion and that semi-implicit time integration is the most reliable.

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