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.
Hidden Sector Monopole Dark Matter with Matter Domination
重于$)$ TeV $O(10-100 $的残余暗物质的热冻结机制需要违反微扰么正性的截面。然而,从粒子物理学的角度来看,比这些尺度更重的暗物质的存在肯定是合理的,这表明需要一个非热宇宙学的历史来支持这样的理论。拓扑学上的暗物质就是一个很好的例子。在这里,隐藏的扇区暗物质可以通过描述在二阶相变中产生的缺陷的非平衡动力学的Kibble-Zurek机制大量产生。我们重新审视原来的拓扑暗物质的情况下,重点隐藏的部门磁单极子,并考虑更一般的宇宙历史。我们发现,一个大质量的顺序($1-10^5$)PeV是通用的热历史考虑在这里,如果单极子是完全再现当前丰度的暗物质。特别是,在一个场景中,涉及早期时代的物质支配,的辐射数密度总是小于或等于在一个纯粹的辐射为主的等价提供了一定的条件,满足临界指数。这导致了在这样的宇宙学中,需要更大的质量来解释一个固定的遗迹丰度。
Laboratoire Univers et Particules de Montpellier (LUPM), University of Montpellier & CNRS, Montpellier, France(蒙彼利埃大学与法国国家科学研究中心联合宇宙与粒子物理实验室);Service de Physique Théorique, Université Libre de Bruxelles (ULB), Brussels, Belgium(布鲁塞尔自由大学理论物理系);Laboratoire de Physique Théorique et Hautes Énergies (LPTHE), CNRS & Sorbonne Université, 4 Place Jussieu, Paris, France(索邦大学与法国国家科学研究中心联合理论物理与高能物理实验室)