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arXiv 1609.03364hep-ph
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简单$t$通道模型中的费米暗物质

Fermionic Dark Matter in a simple $t$-channel model

Ashok Goyal, Mukesh Kumar

摘要:

在一个简单的$t$通道模型中,考虑了可重整化标准模型规范相互作用中的费米暗物质粒子。DM粒子与SM费米子的相互作用是通过携带颜色或轻子数的标量和矢量介质的交换。在本研究中考虑的有色介质的情况下,我们发现,如果DM是热产生的,并占所观察到的遗物密度几乎整个参数空间被排除的直接检测观测。在这种情况下,在大型强子对撞机上进行的单喷流加缺失能量搜索的边界不那么严格。相比之下,马约拉纳DM的情况下,我们得到强的边界从单喷搜索排除DM粒子的质量小于约几百GeV的标量和矢量介质。

英文摘要:

We consider a fermionic dark matter (DM) particle in renormalizable Standard Model (SM) gauge interactions in a simple $t$-channel model. The DM particle interactions with SM fermions is through the exchange of scalar and vector mediators which carry colour or lepton number. In the case of coloured mediators considered in this study, we find that if the DM is thermally produced and accounts for the observed relic density almost the entire parameter space is ruled out by the direct detection observations. The bounds from the monojet plus missing energy searches at the Large Hadron Collider are less stringent in this case. In contrast for the case of Majorana DM, we obtain strong bounds from the monojet searches which rule out DM particles of mass less than about a few hundred GeV for both the scalar and vector mediators.

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