京都大学、广岛大学和日本大学的研究团队提出了一种新颖的暗物质探测方法，利用地球磁场和大气圈作为巨型探测器来搜索超轻轴子和暗光子等最轻形式的暗物质。1 暗物质占宇宙总能量含量的约四分之一。1
研究人员分析了2012年至2022年间英国地质调查局收集的地磁测量数据，共约10年的观测记录。1 他们建立的新理论框架可预测8赫兹附近的信号，以及高达30赫兹的频率范围内可能出现的信号。1 分析结果中，研究团队识别出多个可能具有暗物质起源的信号候选，这些信号的质量范围比电子轻19到21个数量级。1 对超轻轴子的约束条件相比之前的地基实验提高了约100倍。1
这些神秘信号的真实来源仍需进一步确认。1
Researchers from Japanese institutions including Kyoto University have employed an innovative approach to search for some of the universe's lightest dark matter particles by using Earth's magnetic field and atmosphere as a giant detector.1 The team analyzed approximately a decade of geomagnetic measurement data collected by the British Geological Survey between 2012 and 2022, identifying multiple candidate signals that may originate from dark matter.1
The study focused on ultralight axions and dark photons, particles whose mass is 19 to 21 orders of magnitude lighter than an electron.1 The theoretical framework developed by the researchers predicts signals concentrated around 8 hertz, with a frequency range potentially extending to as high as 30 hertz.1 While the analysis has improved constraints on ultralight axions by approximately 100 times compared to previous ground-based experiments, the origin of the detected signals remains unconfirmed.1
Dark matter comprises roughly one-quarter of the total energy content of the universe, yet its fundamental nature remains one of physics' most pressing mysteries.1
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