Neutrino quantum kinetics in three flavors

Abstract

The impact of neutrino flavor conversion on the supernova mechanism is yet to be fully understood. We present multi-energy and multi-angle solutions of the neutrino quantum kinetic equations in three flavors, without employing any attenuation term for the neutrino self-interaction strength and taking into account neutrino advection and non-forward collisions with the background medium. Flavor evolution is explored within a spherically symmetric shell surrounding the region of neutrino decoupling in the interior of a core-collapse supernova, relying on the output of a spherically symmetric core-collapse supernova model with a progenitor mass of $18.6M_{\odot }$. We select two representative post-bounce times: $t_{\mathrm{pb}}=0.25$ s (no angular crossings are present and flavor conversion is triggered by slow collective effects) and $t_{\mathrm{pb}}=1$ s (angular crossings trigger fast flavor instabilities). We find that flavor equipartition is achieved for the late post-bounce time ($t_{\mathrm{pb}}=1$ s), where the (anti)neutrino emission properties among different flavors tend to approach each other. In this case, ${\bar{\nu }}_e$ tends to ${\bar{\nu }}_x=({\bar{\nu }}_{\mu }+{\bar{\nu }}_{\tau })/2$ and a similar trend holds for neutrinos. However, flavor equipartition does not occur for our early post-bounce time ($t_{\mathrm{pb}}=0.25$ s). Accounting for weak-magnetism corrections, crossings in the $\mu$ and $\tau$ lepton number angular distributions arise; however, such crossings have a magnitude smaller than the one occurring in the electron sector and negligibly affect flavor evolution. Because of flavor conversion, the neutrino heating rate increases up to $30\%$ with respect to the case where flavor conversion is neglected.

26 pages, including 12 figures and two appendices. Matches version accepted for publication in JCAP

References in corpus (61)

• Theory of Core-Collapse Supernovae
• Collective Neutrino Oscillations
• Simulation of Coherent Non-Linear Neutrino Flavor Transformation in the Supernova Environment I: Correlated Neutrino Trajectories
• Self-induced conversion in dense neutrino gases: Pendulum in flavour space
• Collective Neutrino Flavor Transformation In Supernovae
• Speed-up of neutrino transformations in a supernova environment
• Collective neutrino flavor transitions in supernovae and the role of trajectory averaging
• Fast Pairwise Conversion of Supernova Neutrinos: A Dispersion-Relation Approach
• New Developments in Flavor Evolution of a Dense Neutrino Gas
• Coherent Development of Neutrino Flavor in the Supernova Environment
• Muon Creation in Supernova Matter Facilitates Neutrino-driven Explosions
• Neutrino cloud instabilities just above the neutrino sphere of a supernova
• The multi-angle instability in dense neutrino systems
• Role of dense matter in collective supernova neutrino transformations
• Analysis of Collective Neutrino Flavor Transformation in Supernovae
• Self-induced neutrino flavor conversion without flavor mixing
• Collective three-flavor oscillations of supernova neutrinos
• Fast neutrino flavor conversions near the supernova core with realistic flavor-dependent angular distributions
• Fast neutrino conversions: Ubiquitous in compact binary merger remnants
• 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 instability and neutrino flavor lepton number crossings
• Fast neutrino flavor conversion, ejecta properties, and nucleosynthesis in newly-formed hypermassive remnants of neutron-star mergers
• Flavor-dependent neutrino angular distribution in core-collapse supernovae
• The Role of Collective Neutrino Flavor Oscillations in Core-Collapse Supernova Shock Revival
• Self-refraction of supernova neutrinos: mixed spectra and three-flavor instabilities
• Analysis of matter suppression in collective neutrino oscillations during the supernova accretion phase
• 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
• Spectral split in prompt supernova neutrino burst: Analytic three-flavor treatment
• Fast neutrino flavor conversion: roles of dense matter and spectrum crossing
• Roles of fast neutrino-flavor conversion on the neutrino-heating mechanism of core-collapse supernova
• Neutrino mass hierarchy and three-flavor spectral splits of supernova neutrinos
• Time-dependent and quasi-steady features of fast neutrino-flavor conversion
• A change of direction in pairwise neutrino conversion physics: The effect of collisions
• Temporal Instability Enables Neutrino Flavor Conversions Deep Inside Supernovae
• Fast flavor conversions in supernovae: the rise of mu-tau neutrinos
• Normal-mode Analysis for Collective Neutrino Oscillations
• The Fast Flavor Instability in Hypermassive Neutron Star Disk Outflows
• Fast neutrino flavor conversions in one-dimensional core-collapse supernova models with and without muon creation
• Neutrino flavor instabilities in a time-dependent supernova model
• Three flavor neutrino conversions in supernovae: Slow $\&$ Fast instabilities
• Neutrino propagation hinders fast pairwise flavor conversions
• Slow and fast collective neutrino oscillations: Invariants and reciprocity
• The three flavor revolution in fast pairwise neutrino conversion
• Multi-Dimensional Solution of Fast Neutrino Conversions in Binary Neutron Star Merger Remnants
• Neutrino Flavor Conversion, Advection, and Collisions: Towards the Full Solution
• Supernova neutrino three-flavor evolution with dominant collective effects
• Triggering collective oscillations by three-flavor effects
• Connecting small-scale to large-scale structures of fast neutrino-flavor conversion
• General-Relativistic Quantum-Kinetics Neutrino Transport
• Fast neutrino flavor conversions in a supernova: Emergence, evolution, and effects
• Neutrino Decoupling Is Altered by Flavor Conversion
• Muons in the aftermath of neutron star mergers and their impact on trapped neutrinos
• Robust integration of fast flavor conversions in classical neutrino transport
• Neutrinos from explosive transients at the dawn of multi-messenger astronomy
• The Influence of Muons, Pions, and Trapped Neutrinos on Neutron Star Mergers
• Flavor conversions with energy-dependent neutrino emission and absorption
• Quasi-steady evolution of fast neutrino-flavor conversions
• Neutrino quantum kinetics in two spatial dimensions
• Three-flavor, Full Momentum Space Neutrino Spin Oscillations in Neutron Star Mergers