An improved limit on the electric dipole moment of the Muon at the Fermilab E989 experiment.

E989 μ子g-2实验是位于费米实验室设施的精密存储环实验。它的主要目标是将μ子异常磁矩测量到前所未有的精度，从而将au的系统不确定性从之前的实验（Brookhaven E821实验）降低到百万分之0.14 （ppm）的精度。寻找介子电偶极矩（EDM）也将由E989实验进行。一个处于非简并态的粒子的永久电火花加工违反宇称(P)和时间反转(T)对称性，因此意味着CP违反。与弱轻子衰变中最大的宇称破坏不同，在轻子扇区中从未观察到CP破坏。考虑到观测到的CP破坏水平很小（只在中性介子和b介子的衰变中看到），标准模型（SM）预测轻子的edm非常小，以至于在可预见的未来，它们的探测远远超出了实验能力。因此，任何非零的实验值都表明新物理的存在。μ子的永久电火花，如果存在的话，会有一个独特的特征。电火花加工会使μ子进动面产生偏离垂直方向的倾斜，并产生与au振荡相异90度的微小垂直振荡。利物浦大学正在建造跟踪探测器，能够测量这些微小的垂直振荡。我将对实验自旋进动数据进行分析，以寻找EDM振荡的特征，灵敏度降至10-21e.cm。目的是检测电火花加工信号或提高电火花加工的实验极限。

The E989 Muon g-2 experiment is a precision storage ring experiment located at the Fermilab facility. It's primary goal is to measure the muon anomalous magnetic moment to unprecedented precision and thus reduce the systematic uncertainty of au from the previous experiment, the Brookhaven E821 experiment, to a precision of 0.14 parts per million (ppm). A search for a muon electric dipole moment (EDM) will also be performed by the E989 experiment. A permanent EDM for a particle in a non-degenerate state violates both parity (P) and time reversal (T) symmetries and therefore implies CP violation. Unlike parity violation, which is maximal in weak leptonic decays, CP violation has never been observed in the leptonic sector. Given the small observed levels of CP violation (seen only in the decays of neutral Kaons and B-mesons), the standard model (SM) predicts that the EDMs of the leptons are so small that their detection is well beyond experimental capabilities for the foreseeable future. Therefore, any non-zero experimental value would indicate the existence of new physics. The permanent EDM of a muon, if it were to exist, would have a distinctive signature. An EDM would cause a tilt in the muon precession plane away from the vertical orientation and produce tiny vertical oscillations which are 90 degrees out of phase with the au oscillation. Tracking detectors are being constructed at Liverpool University which are capable of measuring these tiny vertical oscillations. I will perform analysis on the experimental spin precession data to look for the signature of an EDM oscillation down to a sensitivity of 10-21e.cm. With the aim of either detecting an EDM signal or improving the experimental limit on the EDM.