Weak Interactions in Atomic Physics

原子物理中的弱相互作用

• 批准号: 8907258
• 负责人: Walter Johnson
• 金额: $ 12.54万
• 依托单位: University of Notre Dame
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-09-01 至 1991-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8907258&HistoricalAwards=false
• 关键词: Weak; Interactions; Atomic; Physics

It is proposed to obtain precise theoretical values for amplitudes of the parity non-conserving transitions in heavy atoms induced by exchange of neutral Z particles between the nucleus and the atomic electrons, thereby permitting the determination of the Weinberg angle from atomic physics experiments. The amplitudes are obtained with a relativistic version of many-body perturbation theory. The multiple sums occurring in higher order are evaluated with finite-basis techniques. All orders methods have been devised and will be applied to cesium. With energies, transition amplitudes, and hyperfine constants accurate to 1% the parity non conserving amplitudes can be obtained with errors at the 1% level.

给出了中性Z粒子在原子核和原子电子之间的交换引起的重原子宇称非守恒跃迁幅度的精确理论值，从而可以从原子物理实验中确定Weinberg角。振幅是用相对论形式的多体微扰理论得到的。用有限基技术计算高阶出现的多重和。所有的订单方法都已经设计出来，并将应用于铯。在能量、跃迁振幅和超精细常数精确到1%的情况下，可以得到宇称非守恒振幅，误差在1%的水平。