Journal Article

PUBDB-2026-00018

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Neutrino-Mass-Driven Instabilities as the Earliest Flavor Conversion in Supernovae

Fiorillo, D. F. G. (Corresponding author)Extern*DESY* ; Janka, H.-T. ; Raffelt, G. G.

2025
APS College Park, Md.

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Please use a persistent id in citations: doi:10.1103/jbmx-rbzt  doi:10.3204/PUBDB-2026-00018

Report No.: arXiv:2507.22985

Abstract: Collective neutrino flavor conversions in core-collapse supernovae begin with instabilities, initially triggered when the dominant νe outflow concurs with a small antineutrino flux of opposite lepton number, with $\bar{ν}_e$ dominating over $\bar{ν}_μ$. When these “flipped” neutrinos emerge in the energy-integrated angular distribution (angular crossing), they initiate a fast instability. However, before such conditions arise, spectral crossings typically appear within 20 ms of collapse, i.e., local spectral excesses of $\bar{ν}_e$ over $\bar{ν}_μ$ along some direction. Therefore, postprocessing supernova simulations cannot consistently capture later fast instabilities because the early slow ones have already altered the conditions.

Note: cc-by, 5 pages, 3 figures, plus Supplemental Material; version accepted for publication on PRL, added clarifications and changed title; Fig. S5 added

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Contributing Institute(s):

1. Theoretische Astroteilchenphysik (Z_THAT)

Research Program(s):

1. 613 - Matter and Radiation from the Universe (POF4-613) (POF4-613)
2. DFG project G:(GEPRIS)390783311 - EXC 2094: ORIGINS: Vom Ursprung des Universums bis zu den ersten Bausteinen des Lebens (390783311) (390783311)
3. DFG project G:(GEPRIS)283604770 - SFB 1258: Neutrinos und Dunkle Materie in der Astro- und Teilchenphysik (NDM) (283604770) (283604770)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2025

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Database coverage:
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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint Fiorillo, D. F. G. (Corresponding author)Extern* ; Janka, H.-T. ; Raffelt, G. G.
Neutrino-Mass-Driven Instabilities as the Earliest Flavor Conversion in Supernovae
College Park, Md. : APS (2025)2025     Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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