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arXiv 2007.03703hep-phastro-ph.HEhep-th
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具有电弱对称日冕的磁性黑洞的唯象

Phenomenology of Magnetic Black Holes with Electroweak-Symmetric Coronas

Yang Bai, Joshua Berger, Mrunal Korwar, Nicholas Orlofsky

备注：
40 pages, 3 figures; v2: Parker bound relaxed by 4pi due to unit correction
发表信息：
JHEP 10 (2020) 210
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摘要：

磁荷黑洞（MBH）是标准模型和广义相对论的有趣解。它们可能在事件视界外拥有一个“毛茸茸的”电弱对称日冕，这加速了它们的霍金辐射，并导致它们在短时间尺度上变得几乎极端。它们的质量可以从普朗克尺度到地球质量不等。我们研究了各种方法来寻找原始生产的MBH，并估计其丰度的上限。我们重新审视磁单极子上的帕克束缚，并表明它可以使用仙女座大尺度相干磁场扩展几个数量级。这设定了一个质量无关的约束，即MBH的丰度小于暗物质丰度的$6 \times 10^{-3}$倍。MBH也可以在太阳、地球或中子星等天体物理系统中捕获。在那里，它们可以通过与带相反电荷的MBH合并或吸收核子而变得非极值。由此产生的霍金辐射可以被探测为中微子、光子或热。高能中微子搜索尤其可以为某些MBH质量设定比帕克束缚更强的束缚，直到暗物质的丰度达到$10^{-7}$。

英文摘要：

Magnetically charged black holes (MBHs) are interesting solutions of the Standard Model and general relativity. They may possess a "hairy" electroweak-symmetric corona outside the event horizon, which speeds up their Hawking radiation and leads them to become nearly extremal on short timescales. Their masses could range from the Planck scale up to the Earth mass. We study various methods to search for primordially produced MBHs and estimate the upper limits on their abundance. We revisit the Parker bound on magnetic monopoles and show that it can be extended by several orders of magnitude using the large-scale coherent magnetic fields in Andromeda. This sets a mass-independent constraint that MBHs have an abundance less than $6 \times 10^{-3}$ times that of dark matter. MBHs can also be captured in astrophysical systems like the Sun, the Earth, or neutron stars. There, they can become non-extremal either from merging with an oppositely charged MBH or absorbing nucleons. The resulting Hawking radiation can be detected as neutrinos, photons, or heat. High-energy neutrino searches in particular can set a stronger bound than the Parker bound for some MBH masses, down to an abundance $10^{-7}$ of dark matter.

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