Precision Tests of the Standard Model using Parity-Violating Electron Scattering

使用宇称破坏电子散射对标准模型进行精度测试

• 批准号: 1068667
• 负责人: David Armstrong
• 金额: $ 52万
• 依托单位: College of William and Mary
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-07-15 至 2015-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1068667&HistoricalAwards=false
• 关键词: Precision; Tests; Standard; Model; using

This grant supports a program of two experiments at Jefferson Lab which will use the parity-violating asymmetry in the scattering of polarized electrons to search for evidence of physics beyond the Standard Model. The experiments are the ongoing Qweak measurement and a proposed new experiment for the 12 GeV era at Jefferson Lab, the MOLLER experiment. The first will provide a measurement of the proton's weak charge to 4% precision, and the second will make a 2.3% measurement of the weak charge of the electron. The two results will be complementary, as they are differently sensitive to possible parity-violating new physics, and both have a projected reach for new physics of this kind at the few TeV scale. The grant supports the PI as well as three graduate students, as well as undergraduate students. The principal broader impact of this project is graduate and undergraduate student education. The grant supports three graduate students as well as one undergraduate student; other undergraduates will be involved as well via the senior research projects that are required of all William & Mary physics majors. The PI served on a panel that reviewed the "Standards of Learning" for physics in K-12 education for the Commonwealth of Virginia, and helped to develop a related online resource textbook, and will partner with local schools to help implement the revised standards.

这笔赠款支持杰斐逊实验室的两个实验计划，该计划将利用偏振电子散射中的宇称破坏不对称性来寻找标准模型之外的物理证据。这些实验是杰斐逊实验室正在进行的 Qweak 测量和拟议的 12 GeV 时代的新实验，即 MOLLER 实验。第一个将提供质子弱电荷的测量，精度为 4%，第二个将提供电子弱电荷的 2.3% 测量。这两个结果将是互补的，因为它们对可能违反宇称的新物理的敏感度不同，并且两者都预计在几 TeV 尺度上实现此类新物理。该赠款支持 PI 以及三名研究生和本科生。 该项目主要的更广泛影响是研究生和本科生教育。该补助金支持三名研究生和一名本科生；其他本科生也将参与所有威廉玛丽物理专业所需的高级研究项目。该 PI 曾在一个小组中任职，该小组审查了弗吉尼亚州 K-12 教育中的物理“学习标准”，并帮助开发了相关的在线资源教科书，并将与当地学校合作，帮助实施修订后的标准。

项目成果

Precision measurement of the weak charge of the proton

• DOI: 10.1038/s41586-018-0096-0
• 发表时间: 2018-05
• 期刊: Nature
• 影响因子: 64.8
• 作者: D. Androić;D. Armstrong;A. Asaturyan;T. Averett;J. Balewski;K. Bartlett;J. Beaufait;R. Beminiwattha-R.-Bemin