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.

该赠款支持杰斐逊实验室的两个实验计划，该计划将在偏光电子的散射中使用平等侵略的不对称性来寻找超出标准模型的物理学的证据。实验是正在进行的QWEAK测量值和MOLLER实验Jefferson Lab的12 GEV时代的新实验。第一个将对质子的弱电荷进行测量至4％的精度，第二个将对电子的弱电荷进行2.3％的测量。这两个结果将是互补的，因为它们对可能的平等竞争性新物理学有所不同，并且在几个TEV量表上都可以预计这种新物理学的范围。该赠款支持PI以及三名研究生以及本科生。 该项目的主要广泛影响是研究生和本科生教育。该赠款支持三名研究生以及一名本科生；其他本科生也将通过所有威廉和玛丽物理学专业的高级研究项目参与其中。 PI在一个小组中使用，该小组审查了弗吉尼亚州K-12教育中物理学的“学习标准”，并帮助开发了一本相关的在线资源教科书，并将与当地学校合作，以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