Magnetic Moments, Mass Ratios, Laser Spectroscopy and QED

磁矩、质量比、激光光谱和 QED

• 批准号: 0100211
• 负责人: Gerald Gabrielse
• 金额: $ 121.56万
• 依托单位: Harvard University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-08-01 至 2006-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0100211&HistoricalAwards=false
• 关键词: Magnetic; Moments; Mass; Ratios; Laser

This project in precision measurements seeks to measure at greatly improved accuracy the following four fundamental quantities: 1) the magnetic moment of the electron (often called its g value) ; 2) the fine structure constant; 3) the ratio of positron and electron g values; and 4) the ratio of the masses of the proton and electron. The measurement of the fine structure constant, along with the measurement of g, will test QED to an unprecedented level of accuracy. Greatly improved techniques for trapping positrons will aid the comparison of measured g values for the electron and positron to provide the best test of CPT invariance with a lepton system.

这个精密测量项目旨在大大提高以下四个基本量的测量精度：1）电子的磁矩（2）精细结构常数，（3）正电子和电子g值之比，（4）电子的g值，（5）电子的g值，（6）电子的g值，（7）电子的g值，（8）电子的g值，（9）电子的g值，（10）电子的g值。4）质子和电子的质量比。精细结构常数的测量，沿着g的测量，将测试量子电动力学达到前所未有的精确度 捕获正电子的技术大大改进，将有助于比较电子和正电子的g值，为轻子系统的CPT不变性提供最好的测试。