Collective flavor conversions are interactions of neutrinos with quantized flavor waves
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arXiv
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| Hauptverfasser: | , |
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| Format: | Preprint |
| Veröffentlicht: |
2025
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| _version_ | 1866912407711907840 |
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| author | Fiorillo, Damiano F. G. Raffelt, Georg G. |
| author_facet | Fiorillo, Damiano F. G. Raffelt, Georg G. |
| contents | 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 $ψ$, or flavomons, changes the neutrino flavor. When an angular crossing occurs, the process $ν_μ\toν_e+ψ$ is more rapid than its inverse along the direction of the crossing, triggering stimulated $ψ$ emission and fast instability. Calculating the rate via Feynman diagrams matches the fast instability growth rate. Our novel $ν$ and $ψ$ 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_06935 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Collective flavor conversions are interactions of neutrinos with quantized flavor waves Fiorillo, Damiano F. G. Raffelt, Georg G. High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics High Energy Astrophysical Phenomena 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 $ψ$, or flavomons, changes the neutrino flavor. When an angular crossing occurs, the process $ν_μ\toν_e+ψ$ is more rapid than its inverse along the direction of the crossing, triggering stimulated $ψ$ emission and fast instability. Calculating the rate via Feynman diagrams matches the fast instability growth rate. Our novel $ν$ and $ψ$ 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. |
| title | Collective flavor conversions are interactions of neutrinos with quantized flavor waves |
| topic | High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2502.06935 |