Low Energy, High Precision Muon Experiments

该项目是一项持续的低能量、高精度的介子实验计划。这些测量是瑞士保罗谢勒研究所(PSI)的MuSun实验和芝加哥附近费米国家加速器设施(FNAL)的新G-2实验。这两个实验都利用创新的方法来解决从标准模型的测试到弱核相互作用的性质等一系列问题。PSI的MuSun实验将测量介子氘原子的寿命，精确度约为百万分之十。这项测量将确定重离子双重态俘获率达到无与伦比的1.5%的精确度。FNAL的新G-2实验将测量Muon的反常磁矩，精确度约为0.14ppm。这项测量解决了BNL E821结果和标准模型计算的Muon异常之间的巨大差异，并提供了对新粒子和未检测到的力的探测，这独特地补充了大型强子对撞机的物理范围。该项目涉及几个影响更广、意义更广的领域。PI将继续让高中生、物理专业的学生和物理研究生参与研究活动。该团队在高速数据采集和大容量数据分析方面的参与将使我们的学生接触到尖端计算机硬件/软件的许多方面。拟议的教科书数量测量，包括基本参数和基本相互作用，将在核物理、粒子物理学和天体物理学中产生广泛影响。

This project is a continuing program of low energy, high precision, muon experiments. The measurements are the MuSun experiment at Paul Scherrer Institute (PSI) in Switzerland and the new g-2 experiment at Fermi National Accelerator Facility (FNAL) near Chicago. Both experiments utilize innovative methods to address questions ranging from the testing of the Standard Model to the nature of the weak nuclear interaction. The MuSun experiment at PSI will measure the lifetime of the muonic deuterium atom to a precision of about 10 parts-per-million. The measurement will determine the muonic deuterium doublet capture rate to unrivaled accuracy of 1.5%. The New g-2 experiment at FNAL will measure the muon's anomalous magnetic moment to a precision of about 0.14 ppm. The measurement addresses the tantalizing discrepancy between the BNL E821 result and the Standard Model calculation of the muon anomaly and offers a probe of new particles and undetected forces that uniquely complements the physics reach of the Large Hadron Collider. The project involves several areas of broader impact and broader significance. The PI will continue his involvement of high school students, physics majors and physics graduate students in research activities. The group's involvement in high-speed data acquisition and high-volume data analysis will expose our students to many aspects of cutting-edge computer hardware/software. The proposed measurements of textbook quantities including fundamental parameters and basic interactions will have wide-range impact in nuclear, particle and astrophysics.