使用13毫电子伏特阈值超导传感器阵列进行暗物质搜索
Dark matter searches with a 13 meV threshold superconducting sensor array
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中文总结 AI 辅助
该研究利用13毫电子伏特阈值超导传感器阵列进行暗物质搜索，通过特定实验设计建立数据驱动背景模型，给出了隐藏光子动力学混合参数$\chi$的最强约束，首次给出暗物质与核及电子散射地面限制，还为未来相关研究提供可能。
中文摘要 AI 辅助
许多有充分动机的暗物质模型预测，在与地面实验的相互作用中会有毫电子伏特规模的能量沉积，但由于缺乏成熟的单量子探测器，这一领域的探测具有挑战性。本文报告了QUALIPHIDE（暗实验中的量子极限光子）的结果，这是一项低温暗物质搜索实验，使用了一个41像素的能量分辨微波动力学电感探测器阵列，阈值为13毫电子伏特，同时用于寻找太赫兹波长隐藏光子暗物质的转换光子和类粒子轻暗物质相互作用产生的声子。实验设计通过用于隐藏光子搜索的聚焦和非聚焦像素，允许建立数据驱动的背景模型，赋予实验发现潜力。对22小时数据的盲分析显示没有显著过量，在13 - 90毫电子伏特/$c^2$的质量范围内，对隐藏光子动力学混合参数$\chi$设置了最强约束，在50毫电子伏特/$c^2$时达到$1.5\times10^{-12}$。这些数据还首次给出了暗物质与原子核和电子散射的地面限制，分别低至5兆电子伏特/$c^2$和20千电子伏特/$c^2$。低阈值还使得未来能够研究限制低温探测器的低能过量现象，并且如我们所预测的，将允许通过磁场进行太赫兹规模的 QCD轴子搜索。
英文摘要
Many well-motivated dark matter models predict meV-scale energy deposits in interactions with terrestrial experiments, but this regime is challenging to probe due to a lack of mature single-quantum detectors. Here we report results from QUALIPHIDE (QUAntum LImited PHotons In the Dark Experiment), a cryogenic dark matter search using a $41$-pixel array of energy-resolving microwave kinetic inductance detectors with a $13$ meV threshold, simultaneously used to look for both conversion photons from THz wavelength hidden photon dark matter and phonons from particle-like light dark matter interactions. The experimental design, with on- and off-focus pixels for the hidden photon search, allows for a data-driven background model, giving the experiment discovery potential. A blind analysis of $22$ hours of data shows no significant excess, setting the strongest constraints on the hidden photon kinetic mixing parameter $χ$ over the mass range of $13$-$90$ meV/$c^2$, reaching $1.5\times10^{-12}$ at $50$ meV/$c^2$. These data also yield among the first terrestrial limits on dark matter scattering off nuclei and electrons, down to $5$ MeV/$c^2$ and $20$ keV/$c^2$, respectively. The low threshold also enables future study of the low-energy excess limiting cryogenic detectors and, as we project, will allow for a terahertz-scale QCD axion search with a magnetic field.
