Time-dependent and quasisteady features of fast neutrino-flavor conversion

H Nagakura, M Zaizen - Physical Review Letters, 2022 - APS
Despite the theoretical indication that fast neutrino-flavor conversion (FFC) ubiquitously
occurs iin core-collapse supernovae and binary neutron star mergers, the lack of global …

Characterizing quasisteady states of fast neutrino-flavor conversion by stability and conservation laws

M Zaizen, H Nagakura - Physical Review D, 2023 - APS
The question of what ingredients characterize the quasisteady state of fast neutrino-flavor
conversion (FFC) is one of the longstanding riddles in neutrino oscillation. Addressing this …

Fast flavor instability in hypermassive neutron star disk outflows

R Fernández, S Richers, N Mulyk, S Fahlman - Physical Review D, 2022 - APS
We examine the effect of neutrino flavor transformation by the fast flavor instability (FFI) on
long-term mass ejection from accretion disks formed after neutron star mergers. Neutrino …

Neutrino fast flavor instability in three dimensions

S Richers, D Willcox, N Ford - Physical Review D, 2021 - APS
Neutrino flavor instabilities have the potential to shuffle neutrinos between electron, mu, and
tau flavor states, possibly modifying the core-collapse supernova mechanism and the heavy …

Code comparison for fast flavor instability simulations

S Richers, H Duan, MR Wu, S Bhattacharyya, M Zaizen… - Physical Review D, 2022 - APS
The fast flavor instability (FFI) is expected to be ubiquitous in core-collapse supernovae and
neutron star mergers. It rapidly shuffles neutrino flavor in a way that could impact the …

Fast flavor transformations

S Richers, M Sen - Handbook of Nuclear Physics, 2023 - Springer
The neutrino fast flavor instability (FFI) can change neutrino flavor on time scales of
nanoseconds and length scales of centimeters. It is expected to be ubiquitous in core …

[HTML][HTML] Neutrino fast flavor instability in three dimensions for a neutron star merger

E Grohs, S Richers, SM Couch, F Foucart, JP Kneller… - Physics Letters B, 2023 - Elsevier
The flavor evolution of neutrinos in core collapse supernovae and neutron star mergers is a
critically important unsolved problem in astrophysics. Following the electron flavor evolution …

Connecting small-scale to large-scale structures of fast neutrino-flavor conversion

H Nagakura, M Zaizen - Physical Review D, 2023 - APS
We present a systematic study of fast neutrino-flavor conversion (FFC) with both small-scale
and large-scale numerical simulations in spherical symmetry. We find that FFCs can, in …

General-relativistic quantum-kinetics neutrino transport

H Nagakura - Physical Review D, 2022 - APS
We developed a new general-relativistic quantum-kinetics neutrino transport code,
GRQKNT, for numerical studies of quantum kinetics of nonequilibrium neutrinos in six …

Suppression of fast neutrino flavor conversions occurring at large distances in core-collapse supernovae

S Abbar, F Capozzi - Journal of Cosmology and Astroparticle …, 2022 - iopscience.iop.org
Neutrinos propagating in dense neutrino media such as core-collapse supernovae and
neutron star merger remnants can experience the so-called fast flavor conversions on scales …