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

这笔赠款支持杰斐逊实验室的两项实验计划，该计划将利用极化电子散射中违反宇称的不对称性来寻找标准模型以外的物理证据。这些实验是正在进行的量子弱测量，以及杰斐逊实验室为12GeV时代提出的新实验，即穆勒实验。第一个将提供对质子弱电荷的测量，精度为4%，第二个将测量电子的弱电荷，精度为2.3%。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性不同，而且都预计在少数TeV尺度上达到这种新物理的范围。这笔助学金用于资助国际学生联合会和三名研究生以及本科生。这个项目的主要更广泛的影响是研究生和本科生教育。该助学金支持三名研究生和一名本科生；其他本科生也将通过威廉和玛丽大学所有物理专业所要求的高级研究项目参与其中。国际学生联合会参加了一个小组，该小组审查了弗吉尼亚州联邦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。

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.