标题： 粒子对撞机和直接探测实验中的暗物质搜索特征：矢量媒介子 显示英文标题

标题： Characterising dark matter searches at colliders and direct detection experiments: Vector mediators

摘要： 我们引入了一个最小简化暗物质（MSDM）框架，以定量描述大型强子对撞机（LHC）上的暗物质（DM）搜索。 我们研究了两个MSDM模型，其中暗物质是一个狄拉克费米子，与一个矢量和一个轴矢量媒介子相互作用。 这些模型由四个参数表征：暗物质和媒介子的质量，以及媒介子与暗物质和夸克的耦合。 MSDM模型准确捕捉了完整的事件运动学，所有质量和耦合的依赖关系可以系统地研究。 在此框架下对单喷注搜索的解释可用于建立与直接探测实验的平等比较。 对于具有矢量媒介子的理论，LHC单喷注搜索对于轻质量暗物质（小于5 GeV）比直接探测搜索更具敏感性。 对于轴矢量媒介子，LHC和直接探测搜索通常在参数空间中探测正交方向。 我们探讨了这些搜索从LHC最终能力以及多吨位氙气直接探测实验中得出的预期限制，并发现搜索之间的互补性仍然存在。 最后，我们提供了MSDM和有效场论（EFT）框架下的限制比较，以突出EFT框架的不足，特别是在探索单喷注和直接探测搜索互补性时。 显示英文摘要

摘要： We introduce a Minimal Simplified Dark Matter (MSDM) framework to quantitatively characterise dark matter (DM) searches at the LHC. We study two MSDM models where the DM is a Dirac fermion which interacts with a vector and axial-vector mediator. The models are characterised by four parameters: the DM and mediator masses, and the mediator couplings to DM and quarks. The MSDM models accurately capture the full event kinematics, and the dependence on all masses and couplings can be systematically studied. The interpretation of mono-jet searches in this framework can be used to establish an equal-footing comparison with direct detection experiments. For theories with a vector mediator, LHC mono-jet searches possess better sensitivity than direct detection searches for light DM masses (less than 5 GeV). For axial-vector mediators, LHC and direct detection searches generally probe orthogonal directions in the parameter space. We explore the projected limits of these searches from the ultimate reach of the LHC and multi-ton xenon direct detection experiments, and find that the complementarity of the searches remains. Finally, we provide a comparison of limits in the MSDM and effective field theory (EFT) frameworks to highlight the deficiencies of the EFT framework, particularly when exploring the complementarity of mono-jet and direct detection searches.