论文标题
搜索质量范围$ 74 \ mbox { - } 110 \，μ\ mathrm {ev}/c^2 $的深色光子暗物质，带有低温毫米波接收器
Search for Dark Photon Dark Matter in the Mass Range $74\mbox{--}110\,μ\mathrm{eV}/c^2$ with a Cryogenic Millimeter-Wave Receiver
论文作者
论文摘要
我们使用低温毫米波接收器搜索暗光子暗物质（DPDM）。 DPDM与电磁场具有动力学耦合，其耦合常数为$χ$，并在金属板表面转换为普通光子。我们在频率范围内搜索此转换的信号$ 18 \ text { - } 26.5 \，\ mathrm {ghz} $，它对应于质量范围$ 74 \ text { - } 110 \，mu \ mathrm {ev ev}/c^2 $。我们观察到没有显着的信号过量，使我们可以在95 \％置信度设置$χ<（0.3 \ text { - } 2.0）\ times 10^{ - 10} $的上限。这是日期最严格的约束，比宇宙学的约束更加严格。通过使用低温光路和快速光谱仪，可以从先前的研究中得到改善。
We search for the dark photon dark matter (DPDM) using a cryogenic millimeter-wave receiver. DPDM has a kinetic coupling with electromagnetic fields with a coupling constant of $χ$, and is converted into ordinary photons at the surface of a metal plate. We search for signal of this conversion in the frequency range $18\text{--}26.5\,\mathrm{GHz}$, which corresponds to the mass range $74\text{--}110\,mu\mathrm{eV}/c^2$. We observed no significant signal excess, allowing us to set an upper bound of $χ< (0.3\text{--}2.0)\times 10^{-10}$ at 95\% confidence level. This is the most stringent constraint to date, and tighter than cosmological constraints. Improvements from previous studies are obtained by employing a cryogenic optical path and a fast spectrometer.
