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arXiv 1709.08671hep-phastro-ph.HE
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四次势中作为振荡的快中微子味转换

Fast Neutrino Flavor Conversion as Oscillations in a Quartic Potential

Basudeb Dasgupta, Manibrata Sen

摘要:

在稠密环境中的中微子会经历集体对转换$ν_e\barν_e \leftrightarrow ν_x\barν_x$,其中$x$是一种非电子的味道,这是由于彼此的前向散射,这可能是超新星爆炸的关键成分。取决于中微子通量的依赖于味道的局部角分布,转换速率可以是“快”的,即,其数量级为$μ=\sqrt{2}G_F n_ν$,可以远远超过通常的中微子振荡频率$ω=Δm^2/(2E)$。到目前为止,这种令人惊讶的非线性现象只在线性范围内被理解,并使用数值实验进行了进一步的探索。我们提出了一个分析处理的最简单的系统,表现出快速的转换,并表明转换可以被理解为一个粒子滚动的动力学在一个主要由$μ$,但播种较慢的振荡的四次电位。

英文摘要:

Neutrinos in dense environments undergo collective pair conversions $ν_e\barν_e \leftrightarrow ν_x\barν_x$, where $x$ is a non-electron flavor, due to forward scattering off each other that may be a crucial ingredient for supernova explosions. Depending on the flavor-dependent local angular distributions of the neutrino fluxes, the conversion rate can be "fast", i.e., of the order $μ=\sqrt{2}G_F n_ν$, which can far exceed the usual neutrino oscillation frequency $ω=Δm^2/(2E)$. Until now, this surprising nonlinear phenomenon has only been understood in the linear regime and explored further using numerical experiments. We present an analytical treatment of the simplest system that exhibits fast conversions, and show that the conversion can be understood as the dynamics of a particle rolling down in a quartic potential governed dominantly by $μ$, but seeded by slower oscillations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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