Fast neutrino flavor conversions in a supernova: Emergence, evolution, and effects

Xiong, Zewei; Wu, Meng-Ru; George, Manu; Lin, Chun-Yu; Largani, Noshad Khosravi; Fischer, Tobias; Martínez-Pinedo, Gabriel

doi:10.1103/physrevd.109.123008

Phys. Rev. D

2024

DOI: 10.1103/physrevd.109.123008

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Fast neutrino flavor conversions in a supernova: Emergence, evolution, and effects

Zewei Xiong,

Meng-Ru Wu,

Manu George

et al.

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2024

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Cited by 4 publications

References 152 publications

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Neutrino quantum kinetics in two spatial dimensions

Cornelius,

Shalgar,

Tamborra

2024

J. Cosmol. Astropart. Phys.

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Our understanding of neutrino flavor conversion in the innermost regions of core-collapse supernovae and neutron star mergers is mostly limited to spherically symmetric configurations that facilitate the numerical solution of the quantum kinetic equations. In this paper, we simulate neutrino quantum kinetics within a (2+1+1) dimensional setup: we model the flavor evolution during neutrino decoupling from matter in two spatial dimensions, one neutrino momentum variable, and time; taking into account non-forward neutral current and charged current collisions of neutrinos with the matter background, as well as neutrino advection. In order to mimic fluctuations in the neutrino emission and matter background, and explore their effect on the flavor evolution, we introduce perturbations in the collision term as well as in the vacuum term of the Hamiltonian. Because of such perturbations, the initial symmetry of the neutrino field across the simulation annulus is broken and flavor conversion is qualitatively affected, with regions of larger flavor conversion alternating across the simulation annulus. In addition, neutrino advection is responsible for spreading flavor waves across neighboring spatial regions. Although based on a simplified setup, our findings highlight the importance of modeling neutrino quantum kinetics in multi-dimensions to assess the impact of neutrinos on the physics of compact astrophysical sources and nucleosynthesis.

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Neutrino quantum kinetics in two spatial dimensions

Cornelius,

Shalgar,

Tamborra

2024

J. Cosmol. Astropart. Phys.

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Asymptotic-state prediction for fast flavor transformation in neutron star mergers

Richers,

Froustey,

Ghosh

et al. 2024

Phys. Rev. D

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Evolution and the quasistationary state of collective fast neutrino flavor conversion in three dimensions without axisymmetry

George,

Xiong,

et al. 2024

Phys. Rev. D

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Fast neutrino flavor conversions in a supernova: Emergence, evolution, and effects

Cited by 4 publications

References 152 publications

Neutrino quantum kinetics in two spatial dimensions

Neutrino quantum kinetics in two spatial dimensions

Asymptotic-state prediction for fast flavor transformation in neutron star mergers

Evolution and the quasistationary state of collective fast neutrino flavor conversion in three dimensions without axisymmetry

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