论文标题
部分可观测时空混沌系统的无模型预测
Laboratory Constraints on the Neutron-Spin Coupling of feV-scale Axions
论文作者
论文摘要
超轻的轴突样颗粒可以促进太阳附近的暗物质，从而在陆地实验中产生独特的随机特征。我们通过从k-$^3 $ he共同进行大约40天的数据与基于频率域的可能的形式主义重新分析大约40天的数据，从而通过中子自旋耦合搜索此类粒子，从而相对于实验时间范围，在所有轴轴相干时间上都适当说明了随机效应。假设斧头构成了太阳附近的所有暗物质，我们发现中值95％的上升旋转耦合$ 2.4 \ times 10^{ - 10} $ gev $^{ - 1} $从0.4到4 FEV的轴质量比以前的实验室更加严格的范围更为严格。尽管实验的磁力谱中的几个峰表明拒绝了白噪声零假设，但对线形的进一步分析并未提供有关暗物质轴的积极证据。
Ultralight axion-like particles can contribute to the dark matter near the Sun, leading to a distinct, stochastic signature in terrestrial experiments. We search for such particles through their neutron-spin coupling by re-analyzing approximately 40 days of data from a K-$^3$He co-magnetometer with a new frequency-domain likelihood-based formalism that properly accounts for stochastic effects over all axion coherence times relative to the experimental time span. Assuming that axions make up all of the dark matter in the Sun's vicinity, we find a median 95% upper limit on the neutron-spin coupling of $2.4 \times 10^{-10}$ GeV$^{-1}$ for axion masses from 0.4 to 4 feV, which is about five orders of magnitude more stringent than previous laboratory bounds in that mass range. Although several peaks in the experiment's magnetic power spectrum suggest the rejection of a white-noise null hypothesis, further analysis of their lineshapes yields no positive evidence for a dark matter axion.
