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arXiv 2302.06263hep-phastro-ph.HE
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碰撞中微子味不稳定性的共振系统性研究

A Systematic Study on the Resonance in Collisional Neutrino Flavor Instability

Jiabao Liu, Masamichi Zaizen, Shoichi Yamada

AI总结:

本研究系统探讨中微子碰撞味不稳定性中的共振,发现其存在于各向同性破坏模式并显著增强增长速率,通过线性分析与非线性模拟揭示判据及影响因素,并探讨其与快速味转换的共存。

摘要:

本文报道了近期关于中微子碰撞味不稳定性(CFI)中共振现象的研究。我们表明,该共振不仅发生在先前工作中指出的各向同性保持模式中,也发生在各向同性破坏模式中,并且它将CFI的增长速率提高了数个数量级。采用两味方案下的线性分析和非线性数值模拟,并在碰撞项的松弛近似下,我们讨论了共振的判据、其对非线性演化的影响,以及均匀性破坏(k≠0)扰动和背景各向异性对共振的影响。我们还将涉及共振与快速味转换(FFC)的共存。

英文摘要:

Investigations on the resonance in the collisional flavor instability (CFI) of neutrinos, which were reported recently, are reported. We show that the resonance occurs not only for the isotropy-preserving modes as pointed out in the previous work but also for the isotropy-breaking modes and that it enhances the growth rate of CFI by orders of magnitude. Employing the linear analysis and nonlinear numerical simulations in the two-flavor scheme and under the relaxation approximation for the collision term, we discuss the criterion for the resonance, its effect on the nonlinear evolution as well as the influences of homogeneity-breaking (k \ne 0) perturbations as well as of anisotropy in the background on the resonance. We will also touch the cohabitation of the resonance with the fast flavor conversion (FFC).

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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