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arXiv 0912.4033hep-ph
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太阳内部暗物质湮灭产生的中微子振荡

On the Oscillation of Neutrinos Produced by the Annihilation of Dark Matter inside the Sun

Arman Esmaili, Yasaman Farzan

摘要:

被太阳捕获的暗物质粒子的湮灭可以导致在中微子探测器中可观察到的中微子通量。考虑到这些暗物质粒子是非相对论性的,如果一对暗物质湮灭为一对中微子,中微子的光谱将是单色的。我们表明,在这种情况下,即使在太阳内部的生产点平均后,振荡概率的振荡项不平均为零。这导致了有趣的可观察到的特征的μ子轨道事件的数量的年度变化。我们表明,由于太阳内部的暗物质的热分布的光谱涂抹太小,洗出这种变化。指出了利用中微子望远镜测量μ子径迹数的年变化来研究暗物质湮灭产生的中微子初始味成分的可能性。

英文摘要:

The annihilation of dark matter particles captured by the Sun can lead to a neutrino flux observable in neutrino detectors. Considering the fact that these dark matter particles are non-relativistic, if a pair of dark matter annihilates to a neutrino pair, the spectrum of neutrinos will be monochromatic. We show that in this case, even after averaging over production point inside the Sun, the oscillatory terms of the oscillation probability do not average to zero. This leads to interesting observable features in the annual variation of the number of muon track events. We show that smearing of the spectrum due to thermal distribution of dark matter inside the Sun is too small to wash out this variation. We point out the possibility of studying the initial flavor composition of neutrinos produced by the annihilation of dark matter particles via measuring the annual variation of the number of muon-track events in neutrino telescopes.

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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