Self-refraction of supernova neutrinos: mixed spectra and three-flavor instabilities.
Self-refraction of supernova neutrinos: mixed spectra and three-flavor instabilities.
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DOI：
10.1103/physrevlett.104.191102
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发表时间：
2010-01
影响因子：
8.6
通讯作者：
A. Friedland
中科院分区：
文献类型：
--
作者：
A. Friedland
核心坍缩超新星中的中微子在它们自己的背景中经历相干的味道变换。我们在爆炸的冷却阶段探索这种现象。我们的三味计算揭示了定性的新效果相比，两种风味的分析。这些效果是特别清楚地看到了倒置的质量等级：我们发现一个不同的模式的光谱“交换”的中微子光谱和一个新的“混合”光谱的反中微子。简要讨论了相关的物理，包括不稳定的两味演化轨迹，三味模式的光谱“交换”，部分nonadiabaticity的演变。
Neutrinos in a core-collapse supernova undergo coherent flavor transformations in their own background. We explore this phenomenon during the cooling stage of the explosion. Our three-flavor calculations reveal qualitatively new effects compared to a two-flavor analysis. These effects are especially clearly seen for the inverted mass hierarchy: we find a different pattern of spectral "swaps" in the neutrino spectrum and a novel "mixed" spectrum for the antineutrinos. A brief discussion of the relevant physics is presented, including the instability of the two-flavor evolution trajectory, the three-flavor pattern of spectral "swaps," and partial nonadiabaticity of the evolution.