Electromagnetic Properties and Hadronic Parity Violation in Lattice QCD

利用点阵量子色动力学（QCD）计算强子的磁矩和电磁极化率，探讨了强子内部电荷和磁性的分布。计算将使用PI和合作者早先开发的背景场技术进行。新技术也将与有效场论相结合，利用更轻的夸克质量和多体积进行计算。低能弱相互作用的表现将在晶格QCD中进一步研究。非轻子弱相互作用的宇称违反分量引入了强子宇称违反（HPV），并深入探讨了强子内部的夸克-夸克关联。HPV的精确性质取决于将弱相互作用运行到强子尺度，以及只能通过晶格QCD计算来解决的非微扰物理。这项研究将有助于提高我们对构成原子核的粒子的认识，达到迄今为止最先进的水平。由于这个项目，代表性不足的群体的成员将在核科学领域获得机会。少数族裔在纽约城市学院的学生中占多数。在为这些学生提供的入门课程中，PI将整合核科学概念，重点关注在能源、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，包括本项目中的示例。学生将获得计算知识和对核科学概念的广泛理解。在这些更专业水平的机会的基础上，该项目将资助一名核物理研究生的研究。

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.