Conventional approaches to describe dark matter phenomenology at collider and (in)direct detection experiments in the form of dark matter effective field theory or simplified models suffer in general from drawbacks regarding validity at high energies and/or generality, limiting their applicability. In order to avoid these shortcomings, we propose a hybrid framework in the form of an effective theory, including, however, both the dark matter states and a mediator connecting the former to the Standard Model fields. Since the mediation can be realized through rather light new dynamical fields allowing for non-negligible collider signals in missing energy searches, the framework remains valid for the phenomenologically interesting parameter region, while retaining correlations dictated by gauge symmetry. Moreover, a richer new-physics sector can be consistently included via higher-dimensional operators. Interestingly, for fermionic and scalar dark matter with a (pseudo-)scalar mediator, the leading effects originate from dimension-five operators, allowing to capture them with a rather small set of new couplings. We finally examine the correlations between constraints from reproducing the correct relic density, direct-detection experiments, and mono-jet and Higgs + missing energy signatures at the LHC and point out new cancellation patterns in direct-detection, emerging non-trivially in the effective theory.

中文翻译：

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扩展暗物质EFT

描述对撞机上的暗物质现象学的常规方法和以暗物质有效场论或简化模型形式进行的（间接）直接检测实验通常会遇到在高能量和/或通用性方面的有效性缺陷，从而限制了它们的适用性。为了避免这些缺点，我们以有效理论的形式提出了一个混合框架，包括暗物质状态和将前者连接到标准模型领域的介体。由于可以通过相当轻的新动态场来实现调解，因此在缺少能量搜索中允许对撞机信号不可忽略，因此该框架对于现象学上有意义的参数区域仍然有效，同时保留了量规对称性所指示的相关性。此外，通过更高维度的运算符，可以始终包含更丰富的新物理学领域。有趣的是，对于具有（伪）标量介体的费米离子和标量暗物质，主要效应来自5维算符，从而可以使用相当少的一组新耦合来捕获它们。最后，我们检查了重现正确文物密度，直接检测实验以及大型强子对撞机的单喷射和希格斯+缺失能量信号所产生的约束之间的相关性，并指出了直接检测中的新抵消模式，有效地非平凡地出现了理论。可以通过少量新的耦合来捕获它们。最后，我们检查了重现正确文物密度，直接检测实验以及大型强子对撞机的单喷射和希格斯+缺失能量信号所产生的约束之间的相关性，并指出了直接检测中的新抵消模式，有效地非平凡地出现了理论。可以通过少量新的耦合来捕获它们。最后，我们检查了重现正确文物密度，直接检测实验以及大型强子对撞机的单喷射和希格斯+缺失能量信号所产生的约束之间的相关性，并指出了直接检测中的新抵消模式，有效地非平凡地出现了理论。