Precision hadron physics: Muon (g-2) and the fine structure constant ((01) P01)

该项目的目标是改进标准模型对μ子异常[（g-2）]_gamma和精细结构常数alpha_em（M_Z^2）的预测，这两个参数都受到强子贡献的限制。为此，我们将在BESIII进行格点QCD计算和正负电子湮灭的强子截面测量。此外，还将为未来的梅萨加速器上的MAGIX实验开发和建造焦平面探测器。MAGIX的主要目标之一是寻找暗光子作为[（g-2）]_gamma难题的可能解释。

The goal of the project is an improved Standard Model prediction of the muon anomaly, [(g-2)]_gamma, and of the fine structure constant, alpha_em (M_Z^2 ), which are both limited by hadronic contributions. To this end, lattice QCD calculations as well as measurements of the hadronic cross section in electron-positron annihilation at BESIII will be carried out. Furthermore, a focal plane detector for the MAGIX experiment at the future MESA accelerator will be developed and constructed. One of the main goals of MAGIX is the search for Dark Photons as a possible explanation for the [(g-2)]_gamma puzzle.