AI 中文总结
该研究结合电子、缪子的g-2实验数据，对轻矢量玻色子（暗光子、X₁₇玻色子）的参数空间设定95%置信水平约束，分析了耦合假设的影响并与加速器等约束比较，得到相关允许与排除区域。
AI 中文摘要
我们结合当前包含费米实验室最终结果的缪子g-2实验世界平均值，以及基于铯和铷测量的最新电子g-2测定值，对与轻子耦合的纯矢量中介子设定95%置信水平的排除轮廓。我们通过将此受限情况与电子和缪子耦合独立的情况进行比较，明确检验电子与缪子耦合大小相等的假设，并量化其对允许参数空间的影响。在最小可见暗光子模型中，两种轻子约束相同的动力学混合，通过联合χ²分析进行研究。我们将得到的g-2约束与现有加速器直接搜索排除结果、模型相关的天体物理及宇宙学约束进行比较。从加速器比较中，我们在(m_A',|ε|)参数空间中识别出一个接近17 MeV、与已报道的X₁₇质量相近的区域，该区域在此处展示的直接搜索轮廓下仍被允许，但被基于铯的电子g-2约束排除；基于铷的拟合未排除该区间。对于具有独立轻子耦合的X₁₇玻色子，我们分别约束电子和缪子耦合。仅针对电子的直接搜索在已报道的X₁₇质量附近留下两个不连通的允许区域：一个新重新开放的低耦合区间，以及NA64排除带上方的高耦合区域。基于铯的电子g-2约束关闭了高耦合区域，而基于铷的约束减小了其范围；两者均不影响新重新开放的低耦合区间。利用当前实验缪子g-2的世界平均值，我们得到缪子耦合的一个新的基于g-2的排除区域，且对非零耦合无显著偏好。
英文摘要
We combine the current experimental muon $g-2$ world average, which incorporates the final Fermilab result, with the latest electron $g-2$ determinations based on cesium and rubidium measurements to set 95\% CL exclusion contours for a pure vector mediator coupled to leptons. We explicitly test the assumption that the electron and muon coupling magnitudes are equal by comparing this restricted case with the case of independent electron and muon couplings and quantify the impact on the allowed parameter space. In the minimal visible dark-photon model, both leptons constrain the same kinetic mixing and are analyzed through a combined $χ^2$ analysis. We compare the resulting $g-2$ bounds with existing accelerator direct-search exclusions and model-dependent astrophysical and cosmological constraints. From the accelerator comparison, we identify a region in the $(m_{A'},|ε|)$ parameter space near $17$~MeV, close to the reported $X_{17}$ mass, that remains allowed by the direct-search contours displayed here but is excluded by the cesium-based electron $g-2$ constraint. The rubidium-based fit does not exclude this interval. For an $X_{17}$ boson with independent lepton couplings, we constrain the electron and muon couplings separately. Electron-only direct searches leave two disconnected allowed regions near the reported $X_{17}$ mass: a newly reopened low-coupling interval and a higher-coupling region above the NA64 excluded band. The cesium-based electron $g-2$ constraint closes the higher-coupling region, while the rubidium-based constraint reduces its extent; neither affects the newly reopened low-coupling interval. Using the current experimental muon $g-2$ world average, we obtain a new $g-2$-based exclusion region for the muon coupling, with no significant preference for a nonzero coupling.
