论文标题
暗物质的原子干涉仪测试
Atom Interferometer Tests of Dark Matter
论文作者
论文摘要
暗物质的直接检测实验越来越排除大型参数空间。但是，带有颗粒质量的轻型暗物质模型$ <$ gev仍然在很大程度上不受限制。在这里，我们研究了一项建议使用原子干涉仪检测子GEV质量的轻质暗物质子组件。我们使用广义的暗物质直接检测框架描述了由一个原子干涉仪的一个“臂”的暗物质散射引起的分流和相移。这使我们能够考虑多个通道：核后坐力，隐藏的光子过程和轴轴相互作用。我们将此框架应用于几个提出的原子干涉仪实验。由于原子干涉仪对极低的动量沉积敏感，并且它们的相干原子可能会提高灵敏度，因此这些实验将具有很高的竞争力并与其他直接检测方法相辅相成。特别是，原子干涉仪具有唯一的能力，可以探测用$m_χ\ sillsim 10〜 \ rm {kev} $的暗物质子组件。我们发现，对于调解器质量$ m_ϕ = 10^{ - 5}m_χ$，未来的原子干涉仪可能会缩小核后坐的现有约束的差距，降低至$ \barσ_n\ sim 10^{ - 42}}〜\ rm {cm} 10^{ - 1}〜\ rm {mev} $暗物质质量。
Direct detection experiments for dark matter are increasingly ruling out large parameter spaces. However, light dark matter models with particle masses $<$ GeV are still largely unconstrained. Here we examine a proposal to use atom interferometers to detect a light dark matter subcomponent at sub-GeV masses. We describe the decoherence and phase shifts caused by dark matter scattering off of one "arm" of an atom interferometer using a generalized dark matter direct detection framework. This allows us to consider multiple channels: nuclear recoils, hidden photon processes, and axion interactions. We apply this framework to several proposed atom interferometer experiments. Because atom interferometers are sensitive to extremely low momentum deposition and their coherent atoms may give them a boost in sensitivity, these experiments will be highly competitive and complementary to other direct detection methods. In particular, atom interferometers are uniquely able to probe a dark matter sub-component with $m_χ\lesssim 10~\rm{keV}$. We find that, for a mediator mass $m_ϕ=10^{-5}m_χ$, future atom interferometers could close a gap in the existing constraints on nuclear recoils down to $\barσ_n \sim 10^{-42}~\rm{cm}^2$ for $m_χ\sim 10^{-5} - 10^{-1}~\rm{MeV}$ dark matter masses.
