Preprint

PUBDB-2025-01247

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Collective flavor conversions are interactions of neutrinos with quantized flavor waves

Fiorillo, D. F. G. (Corresponding author)Extern*DESY* ; Raffelt, G. G.

2025

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Report No.: arXiv:2502.06935

Abstract: Collective oscillations in dense neutrino gases (flavor waves) are notable for their instabilities that cause fast flavor conversion. We develop a quantum theory of interacting neutrinos and flavor wave quanta, which are analogous to plasmons, but also carry flavor. The emission or absorption of such flavor plasmons $\psi$, or flavomons, changes the neutrino flavor. When an angular crossing occurs, the process $\nu_\mu\to\nu_e+\psi$ is more rapid than its inverse along the direction of the crossing, triggering stimulated $\psi$ emission and fast instability. Calculating the rate via Feynman diagrams matches the fast instability growth rate. Our novel $\nu$ and $\psi$ kinetic equations, corresponding to quasi-linear theory, describe instability evolution without resolving the small scales of the flavomon wavelength, potentially overcoming the main challenge of fast flavor evolution.

Note: 5 pages, 1 figures, plus Supplemental Material

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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)283604770 - SFB 1258: Neutrinos und Dunkle Materie in der Astro- und Teilchenphysik (NDM) (283604770) (283604770)
3. DFG project G:(GEPRIS)390783311 - EXC 2094: ORIGINS: Vom Ursprung des Universums bis zu den ersten Bausteinen des Lebens (390783311) (390783311)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2025

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Database coverage:
Published

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Journal Article Fiorillo, D. F. G. (Corresponding author)Extern* ; Raffelt, G. G.
Collective flavor conversions are interactions of neutrinos with quantized flavor waves
Physical review letters 134, 211003 (2025) [10.1103/PhysRevLett.134.211003]2025     Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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