RUI: Precision Muon Physics

该奖项将使瑞吉斯大学核物理小组在未来三年内为两个精确的μ子物理实验做出实质性贡献：Paul Scherrer研究所（PSI）的MuSun测量氘中的核μ子捕获，以及费米实验室的μ子g-2实验。 MuSun合作将测量从μ介子氘原子的双重自旋态到氘核上的μ介子捕获率，精度优于1.5%。 这将是迄今为止对任何两核子弱相互作用过程的速率的最精确的测定。 Regis小组将开发低功耗的MEMS电路，这些电路将在本实验的低温环境中发挥作用，在仿真软件框架中实现探测器的响应，并参与物理分析。 μ子g-2实验将测量μ子的异常磁矩，精度为百万分之0.15（ppm），比以前测量中达到的0.5 ppm有了实质性的改进。 目前的结果与标准模型的预测相差超过三个标准差：足以暗示“新物理学”的可能性，但还不足以声称发现。 这是在当前标准模型的背景下无法理解的极少数可观测量之一，它为扩展它提供了一个重要的约束。并对用于记录光束动态运动的光纤光束监测器进行现代化改造。2实验有可能发现全新的粒子和相互作用，甚至可能在能量前沿的实验中直接观察到它们之前。 同样，MuSun测量将能够精确表征质子-质子聚变，这是像我们太阳这样的恒星释放能量的原因，也是萨德伯里中微子天文台用来探测太阳中微子的反应。 这门科学处于亚原子物理学的最前沿，该奖项的主要目的是让本科生作为研究助理参与其中。 瑞吉斯大学是一所以教学为重点的小学本科院校，目前正在启动物理学和计算物理学的正式专业，作为其传统文科课程雄心勃勃的扩张的一部分。 该奖项将补充大学的本科研究计划，加强我们的学生在数学，科学和计算教育。 一些学生将能够前往PSI和费米实验室参加这些实验的建设和数据收集。 还将支持参加协作会议、与研究型大学合作伙伴开展协作以及参加学术会议的差旅费。

This award will enable the Regis University nuclear physics group to make substantial contributions to two precision muon physics experiments over the next three years: the MuSun measurement of nuclear muon capture in deuterium at the Paul Scherrer Institute (PSI), and the Muon g-2 experiment at Fermilab. The MuSun collaboration will measure the rate of muon capture on the deuteron from the doublet spin state of the muonic deuterium atom to a precision of better than 1.5%. This will be the most precise determination to date, by an order of magnitude, of the rate for any two-nucleon weak-interaction process. The Regis group will develop low-power preamplifier circuits that will function in the cryogenic environment of this experiment, implement the response of the detector in the simulation software framework, and participate in the physics analysis. The Muon g-2 experiment will measure the anomalous magnetic moment of the muon to a precision of 0.15 parts per million (ppm), a substantial improvement from the 0.5 ppm that has been achieved in previous measurements. The current result disagrees with the prediction of the Standard Model by more than three standard deviations: enough to hint at the possibility of "new physics,'' but not yet enough to claim a discovery. This is one of a very small number of observables that cannot be understood in the context of the current Standard Model, and it provides an important constraint on extensions to it. The Regis group's initial responsibility will be to test, refurbish, and modernize the scintillating fiber beam monitors that are used to record the dynamic motion of the beam.The Muon g-2 experiment has the potential to uncover entirely new particles and interactions, perhaps even before they can be directly observed in experiments at the energy frontier. Similarly, the MuSun measurement will enable a precise characterization of proton-proton fusion, which is responsible for releasing energy in stars like our Sun, and also of the reactions that have been used by the Sudbury Neutrino Observatory to detect solar neutrinos. This science is at the forefront of subatomic physics, and a primary purpose of this award is to allow undergraduate students to become involved in it as research assistants. Regis University is a teaching-focused, primarily-undergraduate institution that is currently initiating formal majors in physics and computational physics as part of an ambitious expansion of its traditional liberal-arts programs. This award will complement the University's undergraduate research initiative, strengthening our students' education in mathematics, the sciences, and computing. Several students will be able to travel to PSI and Fermilab to participate in the construction and data collection for these experiments. Travel to collaboration meetings, for collaborative work with research university partners, and to academic conferences will also be supported.