论文标题
同条深色部门的暗物质
Dark Matter from a Conformal Dark Sector
论文作者
论文摘要
我们考虑了在广泛的能量尺度上通过保形场理论（CFT）描述黑暗部门的理论。黑暗部门与标准模型的耦合破坏了共形不变性。虽然在高能量处弱，但破裂在红外线中会增长，并且在一定的能量尺度上，理论进入了一个受限制的（HADRONIC）阶段。一种强烈的激发可以发挥暗物质的作用。我们研究了一个“共形冻结”宇宙学场景，其中黑暗区域通过与SM的相互作用在相结合时与SM的相互作用进行了填充。在这种情况下，暗物质遗物密度取决于CFT数据，例如与标准模型耦合的CFT操作员的尺寸。我们表明，这种简单且高度预测的暗物质模型在现象学上是可行的。观察到的遗物密度是针对与CFT相连的多种SM操作员（“门户”）复制的，并且所得模型与观察性约束一致。 COFI暗物质候选者的质量预计将在KEV-MEV范围内。
We consider theories in which a dark sector is described by a Conformal Field Theory (CFT) over a broad range of energy scales. A coupling of the dark sector to the Standard Model breaks conformal invariance. While weak at high energies, the breaking grows in the infrared, and at a certain energy scale the theory enters a confined (hadronic) phase. One of the hadronic excitations can play the role of dark matter. We study a "Conformal Freeze-In" cosmological scenario, in which the dark sector is populated through its interactions with the SM at temperatures when it is conformal. In this scenario, the dark matter relic density is determined by the CFT data, such as the dimension of the CFT operator coupled to the Standard Model. We show that this simple and highly predictive model of dark matter is phenomenologically viable. The observed relic density is reproduced for a variety of SM operators ("portals") coupled to the CFT, and the resulting models are consistent with observational constraints. The mass of the COFI dark matter candidate is predicted to be in the keV-MeV range.
