A Program of Medium Energy Nuclear Physics

中能核物理项目

• 批准号: 0072044
• 负责人: Douglas Beck
• 金额: $ 489.67万
• 依托单位: University of Illinois at Urbana-Champaign
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-04-01 至 2003-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0072044&HistoricalAwards=false
• 关键词: Program; Medium; Energy; Nuclear; Physics

The proposed research activity that would be supported by this grant includes research in four broad areas. First, there is the program of parity-nonconserving electron scattering at the JLab accelerator that will try to measure the contribution of "strange" quarks to the structure of protons and neutrons. Second, there are two experiments to measure fundamental properties of the muon. One experiment at BNL to measure the anomalous magnetic moment of the muon in order to test the so-called Standard Model of electroweak interactions and set important limits on "new physics" beyond that model. The other is a measurement at PSI to measure the lifetime of the muon in order to place stringent limits on the universal Fermi coupling constant. Third, there is the experiment at HERA to determine the contribution of quarks and gluons to the intrinsic angular momentum of the proton and neutron by measuring the scattering of polarized electrons on polarized targets. Fourth, there is the program of real Compton scattering at JLab that seeks to test certain aspects of the theory of Quantum Chromodynamics and to measure new features of the quark structure of the proton/ Lastly, all research activities are closely integrated with education at the undergraduate, graduate, and postdoctoral levels, and contribute to important outreach aimed at K-12 students.

这项赠款将支持的拟议研究活动包括四个广泛领域的研究。首先，在JLab加速器上有一个奇偶守恒电子散射项目，该项目将试图测量“奇异”夸克对质子和中子结构的贡献。其次，有两个实验来测量μ子的基本性质。BNL的一个实验是测量μ子的异常磁矩，以测试所谓的电弱相互作用标准模型，并为该模型之外的“新物理学”设定重要限制。另一个是在PSI测量介子的寿命，以便对通用费米耦合常数施加严格的限制。第三，在HERA进行实验，通过测量极化电子在极化靶上的散射来确定夸克和胶子对质子和中子的本征角动量的贡献。第四，JLab有一个真正的康普顿散射项目，旨在测试量子色动力学理论的某些方面，并测量质子夸克结构的新特征。最后，所有的研究活动都与本科、研究生和博士后的教育紧密结合，并有助于针对K-12学生的重要推广。