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arXiv 2407.04768hep-phastro-ph.HE
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太阳中微带电暗物质湮灭产生的高能中微子

High-Energy Neutrinos From Millicharged Dark Matter Annihilation in the Sun

Asher Berlin, Dan Hooper

AI总结:

本研究利用太阳捕获微带电暗物质并湮灭产生高能中微子的机制,重新分析 IceCube 约束,对暗物质微带电组分的质量、电荷和丰度给出新限制。

摘要:

微带电暗物质粒子可被太阳高效捕获,并在太阳内部湮灭为 τ 轻子,从而产生高能中微子。与地球不同,太阳的高温抑制了微带电粒子与原子核结合的比例,因此可能带来较高的湮灭率。我们重新解读了来自 IceCube Neutrino Observatory(冰立方中微子天文台)的现有约束,并利用这些信息对暗物质中微带电成分的比例设定了新的限制。该分析排除了此前尚未探索的参数空间,其质量为 $m_χ\sim(5-100)\\ \text{GeV}$,电荷为 $q_χ\sim10^{-3}-10^{-2}$,且分数丰度可低至 $f_{_\text{DM}}\sim10^{-5}$。

英文摘要:

Millicharged dark matter particles can be efficiently captured by the Sun, where they annihilate into tau leptons, leading to the production of high-energy neutrinos. In contrast to the Earth, the high temperature of the Sun suppresses the fraction of millicharged particles that are bound to nuclei, allowing for potentially high annihilation rates. We recast existing constraints from the IceCube Neutrino Observatory and use this information to place new limits on the fraction of the dark matter that is millicharged. This analysis excludes previously unexplored parameter space for masses of $m_χ\sim (5-100) \ \text{GeV}$, charges of $q_χ\sim 10^{-3}-10^{-2}$, and fractional abundances as small as $f_{_\text{DM}} \sim 10^{-5}$.

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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