Higher Order Corrections to Positronium Energy Levels and Decay Rates

对正电子能级和衰变率的高阶修正

• 批准号: 0070819
• 负责人: Gregory Adkins
• 金额: $ 12.72万
• 依托单位: Franklin and Marshall College
• 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: 2000-06-01 至 2004-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0070819&HistoricalAwards=false
• 关键词: Higher; Order; Corrections; Positronium; Energy

Positronium is an ideal laboratory to study bound state quantum field theory. The present work focuses on the calculation of the energies and decay rates of the low-lying levels of positronium. Theory and older experiments are in disagreement on the spin-triplet decay rate. A more recent experimental measurement of this rate is in much better agreement with theory. The calculation of the O(a2) correction to the orthopositronium decay rate will check the earlier result and help resolve the current diagreement between experiment and theory.

正电子是研究束缚态量子场论的理想实验室。本文的工作重点是计算低能级正电子的能量和衰变速率。理论和旧的实验在自旋三重态衰变速率上存在分歧。最近对这一速率的实验测量与理论更加吻合。对正对电子衰变率的O（a2）修正计算将检验先前的结果，并有助于解决目前实验与理论之间的分歧。