Analysis and Operations for the Precision Measurement of the Muon Anomaly

μ子异常精密测量的分析与操作

基本信息

批准号：
2110479
负责人：
Tim Gorringe
金额：
$ 52万
依托单位：
University of Kentucky Research Foundation
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2021
资助国家：
美国
起止时间：
2021-09-01 至 2025-08-31
项目状态：
未结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2110479&HistoricalAwards=false
关键词：
Analysis Operations Precision Measurement Muon

项目摘要

This award supports research by the PI with the muon g-2 experiment at Fermi National Accelerator Facility in Chicago, Illinois. The goal of the experiment is a precision measurement of the anomalous response of the muon to a strong magnetic field. The anomalous magnetic moment of the muon comes from the `quantum foam' of virtual particles that exists in empty space. The anomaly can be measured precisely and the exact result addresses an intriguing discrepancy between prior measurements and the theoretical calculation of the muon's anomalous magnetism - a discrepancy that hints at unknown forces or new particles of nature. The PI group's responsibilities within the experiment are the operation and maintenance of the experiment's data acquisition system and the data analysis for the extraction of the muon anomalous precession frequency - the measured quantity that determines the anomalous magnetism.The award provides a broader impact through the involvement and training of high school students, physics majors, graduate students and post-doctoral researchers. The group's involvement in large-scale data acquisition, analysis and modeling also exposes students to innovative computer and telecommunications technologies. Moreover, the experiment itself - involving a precision measurement of a textbook quantity - will have a broad impact and a lasting legacy in nuclear, particle and astrophysics.The muon g-2 experiment will measure the muon anomalous magnetic moment to 140 parts-per-billion; a four-fold improvement over the prior BNL E821 experiment. The measurement will address the longstanding ~3.6 standard deviation discrepancy between the previous BNL E821 measurement and the Standard Model prediction. It represents a key test of the Standard Model of Physics and has broad sensitivity to new interactions, particles and phenomenon beyond the Standard Model. The first data taking run took place from November, 2017 through July, 2018 and was published in April, 2021. This initial 460 part-per-billion measurement is in agreement with the earlier 540 part-per-billion result from the BNL E821 experiment and increased the discrepancy between experiment and standard model to 4.2 standard deviations. The team expects a factor of two improvement from the data collected in runs that have not yet been analyzed and a factor of four improvement from future runs of the experiment. This award will support continuing research involving activities in experimental operations, data acquisition and data analysis on the Fermilab g-2 experiment. The PI's group is responsible for the development and the operation of the 20 GByte/sec, 100 TFlop, g-2 data readout and processing system and its upgrades. The PI's group is also responsible for the integrated energy analysis of the muon anomalous precession frequency. This new technique for extracting the frequency uses different raw data, applies different reconstruction procedures, and inherits different systematic uncertainties, in comparison to the traditional positron counting approaches and is important to the demonstration of the robustness of the frequency measurement. Lastly, the PI will continue his overall leadership in the anomalous frequency team as an analysis coordinator.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.

该奖项支持PI在伊利诺伊州芝加哥的Fermi国家加速器设施的MUON G-2实验中进行的研究。实验的目的是对MUON对强磁场的异常响应进行精确测量。若恩的异常磁矩来自存在于空空间中的虚拟颗粒的“量子泡沫”。可以精确测量异常，确切的结果解决了先前测量和穆恩异常磁性的理论计算之间的有趣差异 - 这种差异暗示了未知力量或新的自然粒子。 PI小组在实验中的职责是实验数据采集系统的操作和维护以及提取MUON异常进动频率的数据分析 - 确定异常磁性的测量数量。该奖项通过对高中生，物理学专业的学生，生理学专业的学生和研究生，研究生和培训研究的参与和培训提供了更广泛的影响。该小组参与大规模数据获取，分析和建模还使学生接触了创新的计算机和电信技术。此外，实验本身 - 涉及教科书数量的精确度量 - 将在核，粒子和天体物理学中产生广泛的影响和持久的遗产。MUONG-2实验将测量MUON异常磁矩，达到140分的零件。与先前的BNL E821实验相比，改进了四倍。该测量将解决长期存在的〜3.6标准偏差差异，而先前的BNL E821测量和标准模型预测之间的差异。它代表了物理标准模型的关键测试，并且对超出标准模型的新相互作用，颗粒和现象具有广泛的敏感性。第一个数据进行运行发生在2017年11月至2018年7月，并于2021年4月发布。这项最初的460亿美元的衡量标准与BNL E821实验的540个零件较少零件相吻合，并增加了实验与4.2标准偏差的实验和标准模型之间的差异。该小组预计，与尚未分析的运行中收集的数据相比，将有两倍的改善，而实验的未来运行则提高了四倍。该奖项将支持涉及Fermilab G-2实验的实验操作，数据获取和数据分析的活动的持续研究。 PI小组负责20 GBYTE/SEC，100 TFLOP，G-2数据读数和处理系统及其升级的开发和运行。 PI的组还负责MUON异常进动频率的综合能量分析。与传统的正电子计数方法相比，这项用于提取频率的新技术使用不同的原始数据，应用不同的重建过程，并继承了不同的系统不确定性，并且对于证明频率测量的稳健性很重要。最后，PI将作为分析协调员继续他在异常频率团队中的整体领导。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子优点和更广泛的影响评估标准通过评估来获得支持的。