arXiv 2102.014482021-02-02hep-phphysics.atom-phquant-ph

用自旋放大器寻找类轴子暗物质

Search for axion-like dark matter with spin-based amplifiers

Min Jiang, Haowen Su, Antoine Garcon, Xinhua Peng, Dmitry Budker

备注：: 8 pages, 4 figures
发表信息：: Nature Physics. 2021 Dec;17(12):1402-7
DOI：: 10.1038/s41567-021-01392-z

摘要：

超轻类轴子粒子（ALP）是由超越标准模型的理论引入的暗物质候选者。然而，通过现有的实验室实验对ALP存在的限制受到其当前敏感性的阻碍，这些敏感性通常弱于天体物理极限。在这里，我们展示了一种新的量子传感器来搜索ALP的质量范围，跨越约二十年，从8.3 feV到744 feV。我们的传感器利用超极化的长寿命核自旋作为前置放大器，有效地增强相干振荡的类轴子暗物质场的因子>100。使用基于自旋的放大器，我们实现了18 fT/Hz $^{1/2}$，这是显着优于国家的最先进的核自旋磁强计的磁灵敏度。我们的实验约束的参数空间描述耦合的碱性磷酸酶的核子在我们的质量范围内，在67.5 feV达到$2.9\times 10^{-9}~\textrm{GeV}^{-1}$（$95\%$置信水平），提高了以前的实验室限制至少五个数量级。我们的测量也将ALP-核子二次相互作用和暗光子-核子相互作用限制在新的极限之外

英文摘要：

Ultralight axion-like particles (ALPs) are well-motivated dark matter candidates introduced by theories beyond the standard model. However, the constraints on the existence of ALPs through existing laboratory experiments are hindered by their current sensitivities, which are usually weaker than astrophysical limits. Here, we demonstrate a new quantum sensor to search for ALPs in the mass range that spans about two decades from 8.3 feV to 744 feV. Our sensor makes use of hyperpolarized long-lived nuclear spins as a pre-amplifier that effectively enhances coherently oscillating axion-like dark-matter field by a factor of >100. Using spin-based amplifiers, we achieve an ultrahigh magnetic sensitivity of 18 fT/Hz$^{1/2}$, which is significantly better than state-of-the-art nuclear-spin magnetometers. Our experiment constrains the parameter space describing the coupling of ALPs to nucleons over our mass range, at 67.5 feV reaching $2.9\times 10^{-9}~\textrm{GeV}^{-1}$ ($95\%$ confidence level), improving over previous laboratory limits by at least five orders of magnitude. Our measurements also constrain the ALP-nucleon quadratic interaction and dark photon-nucleon interaction with new limits beyond the astrophysical ones

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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