Simple method of diagnosing fast flavor conversions of supernova neutrinos

2018/07/31 by Basudeb Dasgupta, Alessandro Mirizzi, Manibrata Sen · 4 citations
Physics and Astronomy · #Astrophysics #Astrophysics and Cosmic Phenomena #Electron #Flavor #Lepton #Neutrino #Neutrino Physics Research #Nuclear physics #Nucleosynthesis #Particle physics #Particle physics theoretical and experimental studies #Physics #Supernova #Type II supernova #astro-ph.CO #astro-ph.HE #astro-ph.SR #hep-ph

paper · pdf · doi:10.1103/physrevd.98.103001

published as Phys. Rev. D 98, 103001 (2018) · v2: 9 pages, 4 figures. Matches PRD version titled "Simple method of diagnosing fast flavor conversions of supernova neutrinos"

openalex created_date 2018/07/19 · openalex publication_date 2018/11/01 · arxiv created 2018/11/05 · arxiv updated 2018/11/07 · openalex updated_date 2026/08/05

Abstract

Neutrinos emitted from a supernova may undergo flavor conversions almost immediately above the core, with possible consequences for supernova dynamics and nucleosynthesis. However, the precise conditions for such fast conversions can be difficult to compute and require knowledge of the full angular distribution of the flavor-dependent neutrino fluxes that is not available in typical supernova simulations. In this paper, we show that the overall flavor evolution is qualitatively similar to the growth of a so-called ``zero mode'' determined by the background matter and neutrino densities, which can be reliably predicted using only the second angular moments of the electron lepton number distribution, i.e., the difference in the angular distributions of the \ensuremathν_e and \ensuremathν_e fluxes. We propose that this zero mode, which neither requires computing the full Green's function nor detailed knowledge of the angular distributions, may be useful for a preliminary diagnosis of possible fast flavor conversions in supernova simulations with modestly resolved angular distributions.

Citations

• Generalized Boltzmann formalism for oscillating neutrinos
• Simulation of coherent nonlinear neutrino flavor transformation in the supernova environment: Correlated neutrino trajectories
• Self-induced conversion in dense neutrino gases: Pendulum in flavor space
• Speed-up of neutrino transformations in a supernova environment
• Role of collective neutrino flavor oscillations in core-collapse supernova shock revival
• Collective Neutrino Oscillations
• What can be learned from a future supernova neutrino detection?
• Fast neutrino flavor conversion as oscillations in a quartic potential

Cited by

• Fast flavor oscillations in dense neutrino media with collisions
• Entanglement and collective flavor oscillations in a dense neutrino gas
• Mu-Tau Neutrinos: Influencing Fast Flavor Conversions in Supernovae
• Fast neutrino flavor conversions in one-dimensional core-collapse supernova models with and without muon creation