用地面和天体观测寻找难以捉摸的暗区
Searching for Elusive Dark Sectors with Terrestrial and Celestial Observations
摘要：
我们认为可能存在一个SM-中性和光暗部门耦合到可见部门通过无关的门户网站的相互作用。这类场景是由暗物质激发的，并出现在标准模型的各种扩展中。我们的黑暗动力学的特征在于在一个紫外尺度$Λ_\text{UV}$，在交换重介质领域产生的门户网站运营商，并通过一个红外尺度$Λ_\text{IR}$，设置的质量差距。在能量为$Λ_\text{IR} \ll E \ll Λ_\text{UV}$的情况下，暗扇区的行为类似于共形场论，并且其现象学可以独立地用模型来研究。我们得出的约束设置在这个场景的高，低能量的实验室实验和天体物理观测。我们的结果是保守的，并作为一个最低要求，必须满足广泛的类模型满足我们的假设，其中我们给出了几个例子。实验的约束条件是以符合用于定义门户相互作用的有效场论的有效性的方式导出的。我们发现，高能对撞机给出了最强的界限，并排除UV尺度高达几个TeV，但只有在特定范围内的IR尺度。从目前的搜索中出现的图片可以作为一个起点，设计一个更广泛的敏感性未来的实验策略。
英文摘要：
We consider the possible existence of a SM-neutral and light dark sector coupled to the visible sector through irrelevant portal interactions. Scenarios of this kind are motivated by dark matter and arise in various extensions of the Standard Model. We characterize the dark dynamics in terms of one ultraviolet scale $Λ_\text{UV}$, at which the exchange of heavy mediator fields generates the portal operators, and by one infrared scale $Λ_\text{IR}$, setting the mass gap. At energies $Λ_\text{IR} \ll E \ll Λ_\text{UV}$ the dark sector behaves like a conformal field theory and its phenomenology can be studied model independently. We derive the constraints set on this scenario by high- and low-energy laboratory experiments and by astrophysical observations. Our results are conservative and serve as a minimum requirement that must be fulfilled by the broad class of models satisfying our assumptions, of which we give several examples. The experimental constraints are derived in a manner consistent with the validity of the effective field theory used to define the portal interactions. We find that high-energy colliders give the strongest bounds and exclude UV scales up to a few TeV, but only in specific ranges of the IR scale. The picture emerging from current searches can be taken as a starting point to design a future experimental strategy with broader sensitivity.
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