论文标题
搜索具有铁磁体的轴突状暗物质
Search for axion-like dark matter with ferromagnets
论文作者
论文摘要
暗物质的存在表明存在未知的自然基本定律。超轻的轴突样颗粒是动机良好的候选候选物，自然而然地源自超高能量的物理学理论。我们报告了直接搜索在质量范围内的轴突样暗物质的电磁相互作用的结果，该轴向范围跨越了三十年，从12 pev到12 nev。检测方案基于在存在类似轴突的暗物质的情况下对麦克斯韦方程的修饰，该暗物质与静态磁场混合以产生振荡的磁场。该实验利用了带有铁核合金铁磁粉末的环形磁体，从而使静态磁场增强了24倍。使用鱿鱼，我们达到了150美元$ \ text {at}/\ sqrt {\ sqrt {\ sqrt {\ text {hz}} $，在最敏感的磁性磁性范围的级别上，与任何级别的exporters explient complote;我们记录了41个小时的数据，并提高了对轴向暗物质电磁耦合的大小的最佳限制，在我们的质量范围的一部分中，达到20 pev，达到$ 4.0 \ times 10^{ - 11} { - 11} \ text {gev} {gev}^{ - 1} $（95 \％\％\％\％\％的置信度）。我们的测量值开始探索轴状颗粒的耦合强度和质量，其中与光子混合可以解释宇宙对TEV伽马射线的异常透明度。
Existence of dark matter indicates the presence of unknown fundamental laws of nature. Ultralight axion-like particles are well-motivated dark matter candidates, emerging naturally from theories of physics at ultrahigh energies. We report the results of a direct search for the electromagnetic interaction of axion-like dark matter in the mass range that spans three decades from 12 peV to 12 neV. The detection scheme is based on a modification of Maxwell's equations in the presence of axion-like dark matter, which mixes with a static magnetic field to produce an oscillating magnetic field. The experiment makes use of toroidal magnets with iron-nickel alloy ferromagnetic powder cores, which enhance the static magnetic field by a factor of 24. Using SQUIDs, we achieve a magnetic sensitivity of 150 $\text{aT}/\sqrt{\text{Hz}}$, at the level of the most sensitive magnetic field measurements demonstrated with any broadband sensor. We recorded 41 hours of data and improved the best limits on the magnitude of the axion-like dark matter electromagnetic coupling constant over part of our mass range, at 20 peV reaching $4.0 \times 10^{-11} \text{GeV}^{-1}$ (95\% confidence level). Our measurements are starting to explore the coupling strengths and masses of axion-like particles where mixing with photons could explain the anomalous transparency of the universe to TeV gamma-rays.
