发表机构
University of California Santa Cruz; Princeton University; Argonne National Laboratory; University of Illinois Urbana-Champaign; The University of Tokyo（加州大学圣克鲁兹分校; 普林斯顿大学; 阿贡国家实验室; 伊利诺伊大学厄巴纳-香槟分校; 东京大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
该研究利用太阳引力捕获超轻轴子产生的玻色增强效应，显著放大局部暗物质密度，并据此更新轴子-光子耦合的实验限制与未来预测。
AI 中文摘要
超轻轴子可以被太阳等大质量天体引力捕获，产生太阳束缚引力原子态，通过玻色增强捕获放大局部暗物质密度。对于轴子质量在 $10^{-14}\text{eV}\lesssim m_a \lesssim 10^{-13}\text{eV}$ 范围内的情况，该机制变得指数级高效。我们证明，对于代表性衰变常数 $f_a\sim 3.5\times10^7$ GeV，地球处的局部轴子暗物质密度可增长至标准银河系值 $\rho_0 = 0.4 \text{ GeV/cm}^{3}$ 的十倍以上。结合这一过密度，我们从现有卫星和地面测量中推导出轴子-光子耦合的最新限制，并为即将开展的实验提出改进的预测。
英文摘要
Ultralight axions can be gravitationally captured by massive bodies such as the Sun, producing solar-bound gravitational atom states that amplify the local dark matter density through Bose-enhanced capture. For axion masses in the range $10^{-14}\text{eV}\lesssim m_a \lesssim 10^{-13}\text{eV}$, this mechanism becomes exponentially efficient. We show that, for a representative decay constant $f_a\sim 3.5\times10^7$ GeV, the local axion dark matter density at Earth can grow to more than ten times the standard Galactic value of $ρ_0 = 0.4 \text{ GeV/cm}^{3}$. Incorporating this overdensity, we derive updated limits on the axion-photon coupling from existing satellite and terrestrial measurements and present improved projections for upcoming experiments.
Comments7 pages, 3 figures
