Electromagnetic Properties and Hadronic Parity Violation in Lattice QCD

晶格 QCD 中的电磁特性和强子宇称破缺

• 批准号: 1205778
• 负责人: Brian Tiburzi
• 金额: $ 24.9万
• 依托单位: CUNY City College
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-06-01 至 2016-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1205778&HistoricalAwards=false
• 关键词: Electromagnetic; Properties; Hadronic; Parity; Violation

The distributions of charge and magnetism within hadrons will be explored by calculating their magnetic moments and electromagnetic polarizabilities from lattice quantum chromodynamics (QCD). Computations will be performed using background field techniques developed earlier by the PI and collaborators. New techniques will also be developed in conjunction with effective field theory, and computations utilizing lighter quark masses and multiple volumes will be carried out. Manifestations of the weak interaction at low energies will additionally be investigated in lattice QCD. The parity-violating component of non-leptonic weak interactions introduces hadronic parity violation (HPV), and probes the quark-quark correlations deep within hadrons. The precise nature of HPV depends on running the weak interaction down to hadronic scales, and non-perturbative physics that can only be addressed with lattice QCD computations. This research will help to advance our understanding of particles that make up a nucleus at the most advanced level yet achieved. Members of under-represented groups will be afforded opportunities in nuclear science as a result of this project. Ethnic minority groups constitute a majority of the student population at The City College of New York. In introductory courses serving these students, the PI will integrate nuclear science concepts, focusing on important applications in energy, medicine, and security. In upper-level courses, the PI will integrate numerical work, including examples from this project. Students will gain computational literacy and a broadened understanding of nuclear science concepts. Building on these opportunities at a more professional level, this project will fund the research of a graduate student in nuclear physics.

从晶格量子色动力学(QCD)出发，通过计算强子的磁矩和电磁极化率来研究强子内部的电荷和磁性分布。计算将使用PI和合作者早些时候开发的背景场技术进行。还将结合有效场论开发新技术，并利用较轻夸克质量和多体积进行计算。此外，我们还将在晶格QCD中研究低能弱相互作用的表现。非轻子弱相互作用中的宇称破坏分量引入了强子宇称破坏(HPV)，并探索了强子内部的夸克-夸克关联。HPV的精确性质取决于将弱相互作用精确到强子尺度，以及只能通过格子QCD计算解决的非微扰物理。这项研究将有助于推进我们对构成原子核的粒子的理解，这是迄今为止取得的最先进的水平。由于这一项目，代表不足群体的成员将获得核科学方面的机会。少数族裔群体构成了纽约市立学院学生人数的多数。在为这些学生服务的入门课程中，PI将整合核科学概念，重点放在能源、医学和安全方面的重要应用。在高级课程中，PI将整合数值工作，包括本项目中的例子。学生将获得计算能力，并对核科学概念有更广泛的理解。在更专业水平的这些机会的基础上，这个项目将为一名核物理研究生的研究提供资金。