多能量中微子集合的准稳态味构型
Quasi-steady flavor configuration of multi-energy neutrino ensembles
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中文总结 AI 辅助
针对核心坍缩超新星模拟中中微子自相互作用的建模需求，提出准均匀系统中慢、快中微子味转换的半解析近似，其与多角多能动力学解吻合良好，可用于亚网格方案。
中文摘要 AI 辅助
中微子味转换深刻影响核心坍缩超新星的爆发机制与多信使辐射。然而，当前中微子密集天体环境的流体动力学模拟无法考虑中微子量子动力学，需亚网格方案模拟中微子自相互作用对准稳态味构型的影响。我们提出准周期边界条件下准均匀系统中慢、快味转换结果的半解析近似，该近似与质量顺序无关，在广泛的代表性（反）中微子分布范围内，与中微子动力学方程的多角多能解吻合良好。
英文摘要
Neutrino flavor conversion profoundly impacts the explosion mechanism and multi-messenger emissions of core-collapse supernovae. Yet, state-of-the-art hydrodynamic simulations of neutrino-dense astrophysical environments cannot account for neutrino quantum kinetics, necessitating subgrid schemes to model the impact of neutrino self-interaction on the quasi-steady-state flavor configuration. We present semi-analytical approximations for the outcomes of both slow and fast flavor conversions in quasi-homogeneous systems with periodic boundary conditions. Independent of the mass ordering, our ansatz demonstrates excellent agreement with multi-angle and multi-energy solutions of the neutrino kinetic equations across a wide range of representative (anti)neutrino distributions.
