标量磁力计用于寻找超轻暗光子暗物质：单站点双传感器阵列：一种六通道DTFT似然分析与标量光泵磁力计
Scalar-Magnetometer Search for Ultralight Dark Photon Dark Matter with a Single-Site, Two-Sensor Array: A 6-Channel DTFT Likelihood Analysis with Scalar Optically Pumped Magnetometers
AI总结：
该研究利用单站点双传感器标量磁力计阵列，通过六通道DTFT似然分析，对超轻暗光子暗物质的动能混合参数ε设定了最严格的实验室限制。
摘要：
我们报告了一种使用单站点双传感器标量磁力计阵列在实验室中搜索超轻暗光子暗物质的实验。该实验使用两个标量光泵磁力计（OPMs）以差分配置运行，以抑制共模噪声并增强对空间相干暗光子场的灵敏度。我们分析了10.5小时的连续数据，使用在三个物理频率上评估的六通道复数数据向量，对应于预期暗光子信号三元组。假设高斯噪声，我们开发了一个似然框架，以设定对动能混合参数ε的稳健、频率分辨的上限，该参数控制标准模型光子与暗光子之间的耦合。在质量范围4×10⁻¹⁵ eV ≤ m_A' ≤ 3×10⁻¹⁴ eV内，我们获得了迄今为止最严格的直接实验室限制，补充了现有的天体物理界限，包括从Leo-T矮星系观测推断出的界限。
英文摘要：
We report on a laboratory search for ultralight dark photon dark matter using a single-site, two-sensor scalar magnetometer array. The experiment employs two scalar optically pumped magnetometers (OPMs) operated in a differential configuration to suppress common-mode noise and enhance sensitivity to spatially coherent dark photon fields. We analyze 10.5 hours of continuous data with a six-channel complex data vector evaluated at the three physical frequencies of the expected dark photon signal triplet. Assuming Gaussian noise, we develop a likelihood framework to set robust, frequency-resolved upper limits on the kinetic-mixing parameter $\varepsilon$, which governs the coupling between Standard Model photons and dark photons. Within the mass range $4\times10^{-15}\,\mathrm{eV} \leq m_{A'} \leq 3\times10^{-14}\,\mathrm{eV}$, we obtain the most stringent direct laboratory limits to date on $\varepsilon$, complementing existing astrophysical bounds including those inferred from observations of the Leo-T dwarf galaxy.
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