RUI: Test of QCD Symmetries via Study of Light Pseudoscalar Mesons

RUI：通过研究轻赝标量介子来检验 QCD 对称性

• 批准号: 0855578
• 负责人: Liping Gan
• 金额: $ 23.73万
• 依托单位: University of North Carolina at Wilmington
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-15 至 2013-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0855578&HistoricalAwards=false
• 关键词: RUI; Test; QCD; Symmetries; via

This project is designed to integrate important contributions to the ongoing research at Jefferson lab (Jlab) with an educational experience for promising undergraduate students. A UNCW group with a team of undergraduate students and one full time faculty member has been actively involved in Jefferson lab research in the past seven years. The primary goal of this project is to optimize the undergraduate experience while making important contributions to our understanding of the fundamental properties of QCD at low energy by studying the three lightest neutral pseudoscalar mesons, pion-zero, eta and eta'. This research project consists of several experiments to measure the radiative decay widths and transition form factors of these three particles via the Primakoff Effect, and development of new experimental program to search for eta and eta' rare decays. The results of these measurements will have a significant impact on fundamental aspects of QCD. It will open a new window to determine the fundamental parameters of QCD in a model-independent manner, such as the light quark-mass ratio and the mixing angle of eta-eta' mesons. In addition, the measurements of branching ratio or upper limits for various rare and forbidden decays of eta and eta' will provide sensitive probes to test fundamental symmetries (P, PC and C), and search for new physics beyond the Standard Model.This project will engage undergraduate students as key contributors. It will create a research-enriched learning environment, explore new approaches to recruiting prospective students, and develop new courses which are research related. Students working in an international collaboration will enhance their international experience and gain global perspectives. As a woman physicist active in research, the PI will be a role model to attract female students into science. The involvement of undergraduates has become one of the trademarks of the UNCW research group and matches the university's commitment to provide a high quality undergraduate learning experience.

该项目旨在将杰斐逊实验室（Jlab）正在进行的研究的重要贡献与有前途的本科生的教育经验相结合。在过去的七年里，一个由本科生和一名全职教师组成的UNCW小组一直积极参与杰斐逊实验室的研究。这个项目的主要目标是优化本科生的经验，同时通过研究三个最轻的中性赝标介子，π零，η和η '，为我们理解低能QCD的基本性质做出重要贡献。该研究项目包括通过Primakoff效应测量这三种粒子的辐射衰变宽度和跃迁形状因子的几个实验，以及寻找eta和eta'稀有衰变的新实验计划的开发。这些测量的结果将对QCD的基本方面产生重大影响。这将为以模型无关的方式确定QCD的基本参数，如轻夸克质量比和η-η '介子的混合角，打开一个新的窗口。此外，测量η和η '的各种罕见和禁止衰变的分支比或上限将提供灵敏的探针来测试基本对称性（P，PC和C），并寻找标准模型之外的新物理。本项目将吸引本科生作为主要贡献者。它将创造一个研究丰富的学习环境，探索新的方法来招募未来的学生，并开发与研究相关的新课程。在国际合作中工作的学生将增强他们的国际经验，并获得全球视野。作为一名活跃在研究领域的女物理学家，PI将成为吸引女学生进入科学领域的榜样。本科生的参与已成为UNCW研究小组的标志之一，并符合大学的承诺，提供高质量的本科生学习经验。