Spectra and Decays of Bound Systems in Quantum Chromody- namics and Quantum Electrodynamics (Physics)

量子色动力学和量子电动力学（物理）中束缚系统的光谱和衰变

• 批准号: 8819727
• 负责人: Howard Grotch
• 金额: $ 10.13万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-02-01 至 1992-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8819727&HistoricalAwards=false
• 关键词: Spectra; Decays; Bound; Systems; Quantum

It is proposed to study radiative level shifts in hydrogen, spectra and decays of bound quark-antiquark systems, and radiative corrections to toponium decay. The major effort concerns the lamb shift of hydrogen. The work entails calculation of pure recoil corrections resulting from triple Coulomb exchange, as well as single Coulomb exchange. A calculation of two loop radiative graphs, using Dirac Coulomb propagators, will be initiated. Proposed work on quarkonium bound states will be directed toward formulating a coupled channel mixing approach in which the virtual states are treated relativistically. Research on toponium decay will involve analysis of virtual Higgs contributions.

建议研究氢的辐射能级位移、束缚夸克-反夸克体系的光谱和衰变，以及对toponium衰变的辐射修正。主要的努力是关于氢的羔羊位移。这项工作包括计算三库仑交换和单库仑交换引起的纯反冲修正。计算两个环辐射图，使用狄拉克库仑传播，将开始。关于夸克束缚态的建议工作将指向制定一种耦合通道混合方法，其中虚拟状态被相对论性地处理。对toponium衰变的研究将包括对虚希格斯粒子贡献的分析。