Dynamical equilibria of fast neutrino flavor conversion
astro-ph.HE, hep-th
Submitted: 2025-09-30
Updated: 2025-10-06
DOI: 10.1103/ydrn-np36
License: http://creativecommons.org/licenses/by/4.0/
The gist: Dense neutrino systems, which display collectivity mediated by the weak interaction, have deep parallels with mean-field kinetic systems governed by other fundamental forces.
Terminology
Abstract
Dense neutrino systems, which display collectivity mediated by the weak interaction, have deep parallels with mean-field kinetic systems governed by other fundamental forces. We identify analogues in fast flavor conversion (FFC) of some time-honored nonlinear phenomena in plasmas and self-gravitating systems. We focus in particular on nonlinear Landau damping and collisionless equilibria, which are likely important pieces of the unsolved puzzle of neutrino oscillations in core-collapse supernovae and neutron star mergers. Our analysis additionally reveals the previously unexplored phenomenon of flavor-wave synchronization.
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