Precision Measurement of the Muon Anomalous Magnetic Moment

该奖项支持持续的研究活动，以精确测量称为μ子的基本粒子的特性，μ子类似于电子，但质量更大。 实验在伊利诺斯州芝加哥附近的费米国家加速器实验室进行。 对基本粒子性质的精确实验测试现在是一种行之有效的方法，可以在我们现有的物理知识之外寻找新的自然定律。 测量将解决一个有趣的差异之前的测量和标准模型预测的μ子？的特点，是敏感的新粒子和未被发现的力量，独特的补充其他努力，在高能对撞机和其他地方。 PI将继续参与高中生，物理专业学生，研究生和博士后研究人员的研究活动。该小组参与高性能数据采集，分析和模拟将使学生接触到创新计算机和电信技术的许多方面。μ子g-2实验将测量μ子异常磁矩到140 ppb;比之前的BNL E821实验提高了四倍。 该测量将解决之前BNL E821测量和标准模型预测之间长期存在的~3.5 sigma差异。 它代表了标准模型的一个关键测试，并且对标准模型之外的新粒子和相互作用具有广泛的敏感性。它补充了在能量，强度和宇宙前沿的新物理学的其他研究。μ子g-2项目涉及将E821 μ子储存环从布鲁克海文国家实验室搬迁到费米实验室，以及对探测器，电子和采集子系统进行重大升级。 储存环及其相关仪器在费米实验室μ子园区的安装于2017年完成。第一次数据运行于2017年11月至2018年7月，已经超过了之前BNL E821的统计数据。在未来三年的两个主要运行期内，应实现收集约21倍于BNL E821统计数据的目标。PI的团队一直是，并将继续是20 GByte/sec，100 TFlop，g-2数据读出和处理系统以及Q方法确定异常进动频率的基础设施，分析和模拟工作的领导者。大约三分之一的小组的整体工作将与数据采集的责任和三分之二的整体工作与Q-方法分析的责任相关联。这个奖项反映了NSF的法定使命，并已被认为是值得通过使用基金会的智力价值和更广泛的影响审查标准进行评估的支持。

This award supports continuing research activities to precisely measure characteristics of an elementary particle called the muon, which is similar to the electron but with larger mass. The experiment takes place at Fermi National Accelerator Facility (Fermilab) near Chicago, Illinois. Precise experimental tests of fundamental particle properties are now a well-established way to search for new laws of nature beyond our current physical knowledge. The measurement will address an intriguing discrepancy between a prior measurement and the Standard Model prediction of the muon?s characteristics and is sensitive to new particles and undetected forces that uniquely complement other efforts at high energy colliders and elsewhere. The PI will continue his involvement of high school students, physics majors, graduate students and post-doctoral researchers in research activities. The group's involvement in high-performance data acquisition, analysis and simulations will expose students to many aspects of innovative computer and telecommunications technology. The muon g-2 experiment will measure the muon anomalous magnetic moment to 140 ppb; a four-fold improvement over the prior BNL E821 experiment. The measurement will address the longstanding discrepancy of ~3.5 sigma between the previous BNL E821 measurement and the Standard Model prediction. It represents a key test of the Standard Model and has broad sensitivity to new particles and interactions beyond the Standard Model. It complements other searches for new physics at the energy, intensity and cosmic frontiers. The muon g-2 project has involved the relocation of the E821 muon storage ring from Brookhaven National Laboratory to Fermilab as well as major upgrades of the detector, electronics and acquisition sub-systems. The installation of the storage ring and its associated instrumentation on the Fermilab muon campus was completed in 2017. The first data taking run took place from November, 2017 to July, 2018 and has already exceeded the statistics of prior BNL E821. Two further majo running periods over the next three years should achieve the goals of collecting about 21 times the statistics of BNL E821. The PI's group has been, and continues to be, the lead for both the 20 GByte/sec, 100 TFlop, g-2 data readout and processing system and the infrastructure, analysis and simulation effort for the Q-method determination of the anomalous precession frequency. About one third of the group's overall effort will be associated with data acquisition responsibilities and two thirds of the overall effort associated with Q-method analysis responsibilities.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.