Exploring Fermionic Dark Matter via Higgs Precision Measurements at the Circular Electron Positron Collider
Exploring Fermionic Dark Matter via Higgs Precision Measurements at the Circular Electron Positron Collider
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DOI：
10.1103/physrevd.97.055004
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发表时间：
2017-07
期刊：
影响因子：
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通讯作者：
Qian-Fei Xiang;X. Bi;P. Yin;Zhaolong Yu
中科院分区：
文献类型：
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作者：
Qian-Fei Xiang;X. Bi;P. Yin;Zhaolong Yu
我们研究了费米子暗物质（DM）对圆形正电子对撞机（CEPC）投射希格斯精度测量的影响，包括对$e^+e^- $到Zh$截面和希格斯玻色子双光子衰变的单环效应，以及对希格斯玻色子不可见衰变的树级效应。作为启发性的例子，我们讨论了两个uv完全DM模型，其暗扇区包含通过汤川耦合与希格斯玻色子相互作用的电弱多重子。研究了CEPC对这些模型的敏感性以及来自DM检测和对撞机实验的电流约束。我们发现存在一些参数区域，在这些区域中，CEPC的希格斯测量将与当前的DM搜索互补。
We study the impact of fermionic dark matter (DM) on projected Higgs precision measurements at the Circular Electron Positron Collider (CEPC), including the one-loop effects on the $e^+e^-\to Zh$ cross section and the Higgs boson diphoton decay, as well as the tree-level effects on the Higgs boson invisible decay. As illuminating examples, we discuss two UV-complete DM models, whose dark sector contains electroweak multiplets that interact with the Higgs boson via Yukawa couplings. The CEPC sensitivity to these models and current constraints from DM detection and collider experiments are investigated. We find that there exit some parameter regions where the Higgs measurements at the CEPC will be complementary to current DM searches.