Elementary Particles, Nuclei and Relativity

基本粒子、原子核和相对论

• 批准号: 0244801
• 负责人: Eugene Golowich
• 金额: $ 72.6万
• 依托单位: University of Massachusetts Amherst
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-07-01 至 2006-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0244801&HistoricalAwards=false
• 关键词: Elementary; Particles; Nuclei; Relativity

The proposed research involves research in Nuclear Phenomenology, Particle Phenomenology, String Theory and Cosmology. We propose to develop the most general Nucleon -Nucleon parity violating potential using an effective field theory approach. We propose to study virtual Compton scattering, which is an important tool for understanding hadronic structure. This will be done using light-cone methods. We propose to investigate higher-order terms in chiral perturbation theory and diagrams for electroweak processes, such as the so-called penguin diagrams. Numerical lattice gauge calculations are being improved, and can now treat a number of nonperturbative effects, such as QCD corrections to electroweak decays. We propose to use these chiral perturbation theory techniques to augment present lattice gauge calculations. We will also study charm-anticharm meson mixing, a CP-violating phenomenon which is of current experimental interest. We intend to study the fate of tachyonic instabilities in string theory by studying topological solitons for orbifold tachyons.

拟议的研究涉及核现象学、粒子现象学、弦理论和宇宙学的研究。我们建议使用有效的场论方法开发最通用的核子-核子宇称破坏势。我们建议研究虚拟康普顿散射，这是理解强子结构的重要工具。这将使用光锥方法来完成。 我们建议研究手性微扰理论和电弱过程图（例如所谓的企鹅图）中的高阶项。数值晶格规范计算正在得到改进，现在可以处理许多非微扰效应，例如对电弱衰变的 QCD 校正。我们建议使用这些手性微扰理论技术来增强现有的晶格规范计算。我们还将研究魅力-反魅力介子混合，这是一种当前实验感兴趣的CP破坏现象。 我们打算通过研究轨道折叠快子的拓扑孤子来研究弦理论中快子不稳定性的命运。