Athron Peter, Cornell Jonathan M, Kahlhoefer Felix, McKay James, Scott Pat, Wild Sebastian
1School of Physics and Astronomy, Monash University, Melbourne, VIC 3800 Australia.
2Department of Physics, McGill University, 3600 rue University, Montreal, QC H3A 2T8 Canada.
Eur Phys J C Part Fields. 2018;78(10):830. doi: 10.1140/epjc/s10052-018-6314-y. Epub 2018 Oct 16.
Scalar singlet dark matter is one of the simplest and most predictive realisations of the WIMP (weakly-interacting massive particle) idea. Although the model is constrained from all directions by the latest experimental data, it still has viable regions of parameter space. Another compelling aspect of scalar singlets is their ability to stabilise the electroweak vacuum. Indeed, models of scalar dark matter are not low-energy effective theories, but can be valid all the way to the Planck scale. Using the GAMBIT framework, we present the first global fit to include both the low-energy experimental constraints and the theoretical constraints from UV physics, considering models with a scalar singlet charged under either a or a symmetry. We show that if the model is to satisfy all experimental constraints, completely stabilise the electroweak vacuum up to high scales, and also remain perturbative to those scales, one is driven to a relatively small region of parameter space. This region has a Higgs-portal coupling slightly less than 1, a dark matter mass of 1-2 TeV and a spin-independent nuclear scattering cross-section around .
标量单态暗物质是弱相互作用大质量粒子（WIMP）概念最简单且最具预测性的实现方式之一。尽管该模型受到最新实验数据各方面的限制，但它仍有参数空间的可行区域。标量单态的另一个引人注目的方面是它们稳定电弱真空的能力。实际上，标量暗物质模型并非低能有效理论，而是可以一直有效到普朗克尺度。使用GAMBIT框架，我们给出了首次全局拟合，考虑了在 或 对称性下带电的标量单态模型，纳入了低能实验约束和来自紫外物理的理论约束。我们表明，如果该模型要满足所有实验约束，在高尺度下完全稳定电弱真空，并且在这些尺度下仍保持微扰性，就会被驱使到参数空间中一个相对较小的区域。这个区域的希格斯门户耦合略小于1，暗物质质量为1 - 2 TeV，且自旋无关的核散射截面约为 。
