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arXiv 1808.07513hep-th
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具有暗晕磁单极中的黑洞

Black Holes in Magnetic Monopoles with a Dark Halo

A. Lugo, J. M. Pérez Ipiña, F. A. Schaposnik

摘要:

研究了自发破缺的Einstein-Yang-Mills-Higgs模型通过Higgs门耦合到不带电标量$χ$ .我们提出了一个相图的自引力的解决方案表明,根据$χ$标量势和希格斯门耦合常数$ γ$的参数的选择,可以识别不同的区域:如果$γ$是足够小的$χ$晕周围的核心,反过来包围着一个黑洞。对于较大的$γ$值,没有晕存在,解只是一个黑洞-黑洞。当视界半径增大并大于视界半径时,只有一个黑洞解存在。由于$χ$标量的存在,希格斯势的耦合常数存在一个界限,当它不满足时,真空是不稳定的,不存在非平凡的解决方案。我们简要地评论我们的结果与最近的暗物质轴子模型中发现的可能的连接。

英文摘要:

We study a spontaneously broken Einstein-Yang-Mills-Higgs model coupled via a Higgs portal to an uncharged scalar $χ$. We present a phase diagram of self-gravitating solutions showing that, depending on the choice of parameters of the $χ$ scalar potential and the Higgs portal coupling constant $ γ$, one can identify different regions: If $γ$ is sufficiently small a $χ$ halo is created around the monopole core which in turn surrounds a black-hole. For larger values of $γ$ no halo exists and the solution is just a black hole-monopole one. When the horizon radius grows and becomes larger than the monopole radius solely a black hole solution exists. Because of the presence of the $χ$ scalar a bound for the Higgs potential coupling constant exists and when it is not satisfied, the vacuum is unstable and no non-trivial solution exists. We briefly comment on a possible connection of our results with those found in recent dark matter axion models.

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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