致密中微子等离子体中的集体味转换
Collective flavor conversion in dense neutrino plasmas
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中文总结 AI 辅助
本文综述致密瞬变源中中微子等离子体的集体味转换，提出 flavomons 准粒子描述，并联系数值模拟进展，解释味不稳定性机制。
中文摘要 AI 辅助
致密瞬变源，如超新星（SNe）和中子星并合（NSMs），在其内核中承载着热中微子群体，这些中微子在向外流出时从稠密物质中退耦。然而，无碰撞并不意味着自由；它们的密度足够大，足以介导由相干弱中微子—中微子相互作用驱动的集体波。这些集体波携带的能量很少，但关键在于它们传输味。因此，中微子形成一种无碰撞等离子体，其味传输由味波驱动，味波的量子称为 flavomons $\psi$。这些 flavomons 的波长远短于 SNe 和 NSMs 的特征尺度，因此对中微子等离子体进行暴力数值处理超出了我们的能力。然而，flavomons 不能被忽视，因为受激中微子衰变，示意为 $\overline{\nu}_e\to \overline{\nu}_\mu\psi$，导致其群体迅速增长，更通常地称为味不稳定性。我们回顾了中微子等离子体的理论，并系统讨论了导致 flavomon 增长的不稳定性，并将这一新兴的准粒子描述与数值中微子味动力学的最新进展联系起来。
英文摘要
Compact transient sources, such as supernovae (SNe) and neutron star mergers (NSMs), host a population of thermal neutrinos in their inner cores, which decouple from the dense matter as they stream out. Yet, collisionless does not mean free; their density is large enough to mediate collective waves driven by the coherent weak neutrino--neutrino interaction. These collective waves carry little energy, but crucially they transport flavor. Neutrinos thus form a collisionless plasma with flavor transport driven by flavor waves, whose quanta are called flavomons $ψ$. The wavelength of these flavomons is much shorter than the characteristic scales of SNe and NSMs, so that a brute-force numerical treatment of the neutrino plasma is beyond our capabilities. Yet flavomons cannot be neglected, as the stimulated neutrino decays, schematically $\overlineν_e\to \overlineν_μψ$, cause a rapid buildup in their population, more conventionally called a flavor instability. We review the theory of the neutrino plasma, and systematically discuss the instabilities leading to flavomon growth, and connect this emerging quasiparticle description with recent advances in numerical neutrino flavor kinetics.
发表机构
- Gran Sasso Science Institute（格兰萨索科学研究所）
- Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Napoli（意大利国家核物理研究所（INFN）那不勒斯分部）
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