Theory of neutrino slow flavor evolution. Part II. Space-time evolution of linear instabilities
Abstract Slow flavor evolution (defined as driven by neutrino masses and not necessarily “slow”) is receiving fresh attention in the context of compact astrophysical environments. In Part I of this series, we have studied the slow-mode dispersion relation following our recently developed analogy to...
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2025-06-01
|
| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP06(2025)146 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849333855901712384 |
|---|---|
| author | Damiano F. G. Fiorillo Georg G. Raffelt |
| author_facet | Damiano F. G. Fiorillo Georg G. Raffelt |
| author_sort | Damiano F. G. Fiorillo |
| collection | DOAJ |
| description | Abstract Slow flavor evolution (defined as driven by neutrino masses and not necessarily “slow”) is receiving fresh attention in the context of compact astrophysical environments. In Part I of this series, we have studied the slow-mode dispersion relation following our recently developed analogy to plasma waves. The concept of resonance between flavor waves in the linear regime and propagating neutrinos is the defining feature of this approach. It is best motivated for weak instabilities, which probably is the most relevant regime in self-consistent astrophysical environments because these will try to eliminate the cause of instability. We here go beyond the dispersion relation alone (which by definition applies to infinite media) and consider the group velocities of unstable modes that determines whether the instability relaxes within the region where it first appears (absolute), or away from it (convective). We show that all weak instabilities are convective so that their further evolution is not local. Therefore, studying their consequences numerically in small boxes from given initial conditions may not always be appropriate. |
| format | Article |
| id | doaj-art-76ac06e42e20428ab05d8a0a4b02c235 |
| institution | Kabale University |
| issn | 1029-8479 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj-art-76ac06e42e20428ab05d8a0a4b02c2352025-08-20T03:45:44ZengSpringerOpenJournal of High Energy Physics1029-84792025-06-012025612910.1007/JHEP06(2025)146Theory of neutrino slow flavor evolution. Part II. Space-time evolution of linear instabilitiesDamiano F. G. Fiorillo0Georg G. Raffelt1Deutsches Elektronen-Synchrotron DESYMax-Planck-Institut für PhysikAbstract Slow flavor evolution (defined as driven by neutrino masses and not necessarily “slow”) is receiving fresh attention in the context of compact astrophysical environments. In Part I of this series, we have studied the slow-mode dispersion relation following our recently developed analogy to plasma waves. The concept of resonance between flavor waves in the linear regime and propagating neutrinos is the defining feature of this approach. It is best motivated for weak instabilities, which probably is the most relevant regime in self-consistent astrophysical environments because these will try to eliminate the cause of instability. We here go beyond the dispersion relation alone (which by definition applies to infinite media) and consider the group velocities of unstable modes that determines whether the instability relaxes within the region where it first appears (absolute), or away from it (convective). We show that all weak instabilities are convective so that their further evolution is not local. Therefore, studying their consequences numerically in small boxes from given initial conditions may not always be appropriate.https://doi.org/10.1007/JHEP06(2025)146Neutrino InteractionsNeutrino Mixing |
| spellingShingle | Damiano F. G. Fiorillo Georg G. Raffelt Theory of neutrino slow flavor evolution. Part II. Space-time evolution of linear instabilities Journal of High Energy Physics Neutrino Interactions Neutrino Mixing |
| title | Theory of neutrino slow flavor evolution. Part II. Space-time evolution of linear instabilities |
| title_full | Theory of neutrino slow flavor evolution. Part II. Space-time evolution of linear instabilities |
| title_fullStr | Theory of neutrino slow flavor evolution. Part II. Space-time evolution of linear instabilities |
| title_full_unstemmed | Theory of neutrino slow flavor evolution. Part II. Space-time evolution of linear instabilities |
| title_short | Theory of neutrino slow flavor evolution. Part II. Space-time evolution of linear instabilities |
| title_sort | theory of neutrino slow flavor evolution part ii space time evolution of linear instabilities |
| topic | Neutrino Interactions Neutrino Mixing |
| url | https://doi.org/10.1007/JHEP06(2025)146 |
| work_keys_str_mv | AT damianofgfiorillo theoryofneutrinoslowflavorevolutionpartiispacetimeevolutionoflinearinstabilities AT georggraffelt theoryofneutrinoslowflavorevolutionpartiispacetimeevolutionoflinearinstabilities |