论文标题
Fermilab的MUON异常$A_μ$的Run-1测量值的梁动力学校正
Beam dynamics corrections to the Run-1 measurement of the muon anomaly $a_μ$ at Fermilab
论文作者
论文摘要
费米国家加速器实验室（FNAL）MUON $ G-2 $实验测量了正值磁性异常$a_μm_μ\ equiv（g_μ-2）/2 $，精度为每百万分之0.46，每百万分之0.46，数据在2018年的首次物理学期间收集的数据与以前的实验相结合的是Brokhaven to and the Standard Model to Brokhaven to Brokhaven to Brokhaven。 $4.2σ$，从而加强了新物理学的证据。磁异常是根据MUON自旋进动频率的精确测量确定的，相对于MUON动量和梁所看到的平均磁场。在理想情况下，在具有均匀垂直磁场的水平平面上绕的Muons绕，异常的预动力频率$ω_A$由旋转〜（$ s $）和cyclotron〜（$ c $）频率之间的差异给出，$ω_A=ω__s -ω_c$。可观察到的$ω_A$与$a_μ$成正比。此程序介绍了光束动力学系统更正，这些校正需要调整测得的MUON进动频率$ω^{m} _ {a} $，以便其真实的物理值$ω__{a} $。
The Fermi National Accelerator Laboratory (FNAL) Muon $g-2$ Experiment has measured the positive muon magnetic anomaly $a_μ \equiv (g_μ-2)/2$ with a precision of 0.46 parts per million, with data collected during its first physics run in 2018. The experimental result combined with the measurement from the former experiment at Brookhaven National Laboratory increases the tension with the Standard Model expectation to $4.2σ$, thus strengthening evidence for new physics. The magnetic anomaly is determined from the precision measurements of the muon spin precession frequency, relative to the muon momentum, and the average magnetic field seen by the beam. In an ideal case with muons orbiting in a horizontal plane with a uniform vertical magnetic field, the anomalous precession frequency $ω_a$ is given by the difference between the spin~($s$) and cyclotron~($c$) frequencies, $ω_a = ω_s - ω_c$. The observable $ω_a$ is proportional to $a_μ$. This proceeding presents the beam dynamics systematic corrections that are required to adjust the measured muon precession frequency $ω^{m}_{a}$ to its true physical value $ω_{a}$.
