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000626008 005__ 20250622004631.0
000626008 0247_ $$2arXiv$$aarXiv:2501.16423
000626008 0247_ $$2datacite_doi$$a10.3204/PUBDB-2025-01245
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000626008 041__ $$aEnglish
000626008 088__ $$2arXiv$$aarXiv:2501.16423
000626008 1001_ $$0P:(DE-H253)PIP1111196$$aFiorillo, Damiano Francesco Giuseppe$$b0$$eCorresponding author
000626008 245__ $$aTheory of neutrino slow flavor evolution. Part II. Space-time evolution of linear instabilities
000626008 260__ $$c2025
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000626008 500__ $$a24 pages, 5 figures
000626008 520__ $$aSlow flavor evolution (defined as driven by neutrino masses and not necessarily ``slow'') is receiving fresh attention in the context of compact astrophysical environments. In Part~I of this series, we have studied the slow-mode dispersion relation following our recently developed analogy to plasma waves. The concept of resonance between flavor waves in the linear regime and propagating neutrinos is the defining feature of this approach. It is best motivated for weak instabilities, which probably is the most relevant regime in self-consistent astrophysical environments because these will try to eliminate the cause of instability. We here go beyond the dispersion relation alone (which by definition applies to infinite media) and consider the group velocities of unstable modes that determines whether the instability relaxes within the region where it first appears (absolute), or away from it (convective). We show that all weak instabilities are convective so that their further evolution is not local. Therefore, studying their consequences numerically in small boxes from given initial conditions may not always be appropriate.
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000626008 536__ $$0G:(GEPRIS)283604770$$aDFG project G:(GEPRIS)283604770 - SFB 1258: Neutrinos und Dunkle Materie in der Astro- und Teilchenphysik (NDM) (283604770)$$c283604770$$x1
000626008 536__ $$0G:(GEPRIS)390783311$$aDFG project G:(GEPRIS)390783311 - EXC 2094: ORIGINS: Vom Ursprung des Universums bis zu den ersten Bausteinen des Lebens (390783311)$$c390783311$$x2
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000626008 7001_ $$0P:(DE-HGF)0$$aRaffelt, Georg G.$$b1
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000626008 9141_ $$y2025
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