Fast flavor conversions at the edge of instability in a two-beam model
arXiv:2403.12189 · doi:10.1103/PhysRevLett.133.221004
Abstract
A dense neutrino gas exhibiting angular crossings in the electron lepton number is unstable and develops fast flavor conversions. Instead of assuming an unstable configuration from the onset, we imagine that the system is externally driven toward instability. We use the simplest model of two neutrino beams initially of different flavor that either suddenly appear or one or both slowly build up. Flavor conversions commence well before the putative unstable state is fully attained, and the final outcome depends on how the system is driven. The system generally sticks to the closest state that is linearly stable, a conclusion that we prove for the first time using quasilinear theory. Our results suggest that in an astrophysical setting, one should focus less on flavor instabilities in the neutrino radiation field and more on the external dynamics that leads to the formation of the unstable state.
5 pages, 1 figure, plus Supp. Mat
References in corpus (27)
- Fast Pairwise Conversion of Supernova Neutrinos: A Dispersion-Relation Approach
- Neutrino oscillations in supernovae: angular moments and fast instabilities
- Imprints of neutrino-pair flavor conversions on nucleosynthesis in ejecta from neutron-star merger remnants
- Neutrino Fast Flavor Conversions in Neutron-star Post-Merger Accretion Disks
- Fast Neutrino Flavor Conversion Modes in Multidimensional Core-collapse Supernova Models: the Role of the Asymmetric Neutrino Distributions
- Fast-pairwise collective neutrino oscillations associated with asymmetric neutrino emissions in core-collapse supernova
- Fast Neutrino Flavor Conversions can Help and Hinder Neutrino-Driven Explosions
- Fast Neutrino Flavor Conversion in Core-Collapse Supernovae: A Parametric Study in 1D Models
- On the characteristics of fast neutrino flavor instabilities in three-dimensional core-collapse supernova models
- Fast flavor oscillations in dense neutrino media with collisions
- Collective fast neutrino flavor conversions in a 1D box: Initial condition and long-term evolution
- Roles of fast neutrino-flavor conversion on the neutrino-heating mechanism of core-collapse supernova
- Time-dependent and quasi-steady features of fast neutrino-flavor conversion
- Simple method for determining asymptotic states of fast neutrino-flavor conversion
- Code Comparison for Fast Flavor Instability Simulation
- Evaluating approximate asymptotic distributions for fast neutrino flavor conversions in a periodic 1D box
- Characterizing quasi-steady states of fast neutrino-flavor conversion by stability and conservation laws
- Slow and fast collective neutrino oscillations: Invariants and reciprocity
- Flavor solitons in dense neutrino gases
- Primordial neutrino asymmetry evolution with full mean-field effects and collisions
- Connecting small-scale to large-scale structures of fast neutrino-flavor conversion
- Fast neutrino flavor conversions in a supernova: Emergence, evolution, and effects
- Flavor isospin waves in one-dimensional axisymmetric neutrino gases
- Perturbing Fast Neutrino Flavor Conversion
- Fast Flavor Transformations
- Fast neutrino-flavor swap in high-energy astrophysical environments
- Many-body collective neutrino oscillations: recent developments
Cited by in corpus (20)
- Neutrino Oscillations in Core-Collapse Supernovae and Neutron Star Mergers
- Robust integration of fast flavor conversions in classical neutrino transport
- Theory of neutrino slow flavor evolution. Part I. Homogeneous medium
- Neutrino Flavor Transformation in Neutron Star Mergers
- Fast Flavor Pendulum: Instability Condition
- Collective flavor conversions are interactions of neutrinos with quantized flavor waves
- Quasi-steady evolution of fast neutrino-flavor conversions
- Spectral diversity in collisional neutrino-flavor conversion: flavor equipartition or swap
- Comparative Testing of Subgrid Models for Fast Neutrino Flavor Conversions in Core-collapse Supernova Simulations
- Flavor Equilibration of Supernova Neutrinos: Exploring the Dynamics of Slow Modes
- Predicting the outcome of collisional neutrino flavor conversion
- Quantum maximum entropy closure for small flavor coherence
- Many-Body Simulations of the Fast Flavor Instability
- Impact of Neutrino Flavor Conversions on Neutron Star Merger Dynamics, Ejecta, Nucleosynthesis, and Multi-Messenger Signals
- Testing common approximations of neutrino fast flavor conversion
- Single-wave solutions of the neutrino fast flavor system. Part I. Mechanical properties
- Neutrino flavor instabilities in neutron star mergers with moment transport: Slow, fast, and collisional modes
- Supernova flavour conversions in DUNE: the slow, the fast and the standard
- Approximate Energy-Integration Method for Identifying Collisional Neutrino Flavor Instabilities
- Single-wave solutions of the neutrino fast flavor system. Part II. Weak instabilities and their resonant behavior