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arXiv 0904.3542hep-phastro-ph.SR
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超新星中微子的多重谱裂

Multiple Spectral Splits of Supernova Neutrinos

Basudeb Dasgupta, Amol Dighe, Georg G. Raffelt, Alexei Yu. Smirnov

摘要:

超新星中微子的集体振荡在某些能量区间内将电子中微子和反中微子的光谱与另一种味道的光谱交换,这些能量区间由尖锐的光谱分裂所限定。这种现象比以前认识到的要普遍得多:人们通常会在中微子和反中微子通道中发现一个或多个交换和伴随的分裂,无论是反向中微子质量等级还是正常中微子质量等级。根据不稳定性条件,交换会在光谱交叉点(电子中微子或反中微子通量等于另一种味道的能量,以及所有通量消失的无穷大E)周围发展,交换的宽度由光谱和通量决定。多角度退相干的洗出在整个光谱中变化,并且分裂可以作为尖锐的光谱特征而存在。

英文摘要:

Collective oscillations of supernova neutrinos swap the electron neutrino and antineutrino spectra with those of another flavor in certain energy intervals bounded by sharp spectral splits. This phenomenon is far more general than previously appreciated: typically one finds one or more swaps and accompanying splits in the neutrino and antineutrino channels for both inverted and normal neutrino mass hierarchies. Depending on an instability condition, swaps develop around spectral crossings (energies where the electron neutrino or antineutrino fluxes are equal to that of another flavor, as well as infinite E where all fluxes vanish), and the widths of swaps are determined by the spectra and fluxes. Wash-out by multi-angle decoherence varies across the spectrum and splits can survive as sharp spectral features.

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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