论文标题
原子暗物质的精确宇宙学限制
Precision Cosmological Constraints on Atomic Dark Matter
论文作者
论文摘要
原子暗物质是一个简单但高度高度的动机可能性的可能性，对于可能构成某些暗物质的互动暗部门。 We perform a comprehensive study of precision cosmological observables on minimal atomic dark matter, exploring for the first time the full parameter space of dark QED coupling and dark electron and proton masses $(α_{D}, m_{e_{D}}, m_{p_{D}})$ as well as the two cosmological parameters of aDM mass fraction $f_{D}$ SM重组时的温度比$ξ$。我们还展示了ADM如何从延迟测量中容纳$（H_0，S_8）$张力，从而使拟合度比$λ$ CDM或$λ$ CDM + CDM +深色辐射更好。此外，包括延迟测量结果可导致首选$ξ$和深色氢结合能的封闭轮廓。暗质子质量似乎不受限制。我们的结果是在非线性和较小尺度上对原子暗物质的未来精确研究的重要新起点。
Atomic dark matter is a simple but highly theoretically motivated possibility for an interacting dark sector that could constitute some or all of dark matter. We perform a comprehensive study of precision cosmological observables on minimal atomic dark matter, exploring for the first time the full parameter space of dark QED coupling and dark electron and proton masses $(α_{D}, m_{e_{D}}, m_{p_{D}})$ as well as the two cosmological parameters of aDM mass fraction $f_{D}$ and temperature ratio $ξ$ at time of SM recombination. We also show how aDM can accommodate the $(H_0, S_8)$ tension from late-time measurements, leading to a better fit than $Λ$CDM or $Λ$CDM + dark radiation. Furthermore, including late-time measurements leads to closed contours of preferred $ξ$ and dark hydrogen binding energy. The dark proton mass is seemingly unconstrained. Our results serve as an important new jumping-off point for future precision studies of atomic dark matter at non-linear and smaller scales.
