RUI: Norfolk State University's Research Participation in GlueX and CLAS12 at Jefferson Lab

RUI：诺福克州立大学在 Jefferson 实验室参与 GlueX 和 CLAS12 的研究

• 批准号: 1507208
• 负责人: Carlos Salgado
• 金额: $ 13.58万
• 依托单位: Norfolk State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-09-01 至 2018-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1507208&HistoricalAwards=false
• 关键词: RUI; Norfolk; State; University; Research

The neutrons and protons that make up the nucleus of every atom are themselves made up of constituent particles called quarks and gluons, and held together by what we call the strong nuclear force. This award supports research to the study of the strong interactions between those elementary constituents of matter. More specifically, it is aimed at understanding the properties of the theory of the strong force, named Quantum Chromodynamics or QCD, at energies where nucleons are formed and it is most relevant,. To this end, the PI and the students supported by this award will perform experiments at The Thomas Jefferson National Accelerator Facility (Jefferson Lab,) in Newport News, VA. NSU faculty and undergraduate students will participate in the construction of hardware and in the analysis of data from experiments in the forefront of intermediate energy nuclear physics. Norfolk State University is one of the leading Historically Black Colleges and Universities. NSU graduates more African-American physics majors than all of the other Virginia universities combined. It is a goal of this project to strengthen the national participation of undergraduate minorities in nuclear and particle physics research.In the recent years, numerical solutions of QCD (Lattice-QCD) have provided with a mass spectrum of light-mass mesons. Therefore, it is time for improving our experimental determination of the poorly known light-mass meson spectrum to compare with predictions. Since the interaction carrier of the strong interaction, the gluon, is sensitive to the strong interaction, it is also possible that gluons can be externally observable in the meson spectrum as exotic mesons (particles made of a quark, an antiquark and a gluon). One main question in meson spectroscopy is: Can we find hints of the gluon in the meson spectrum? The PI is analyzing data from meson spectroscopy experiments performed with the CEBAF Large Acceptance Spectrometer (CLAS) in Jefferson Lab's Hall B to search for those hints. He is also involved in two new experiments named GlueX and CLAS12, at the Jefferson Lab 12 GeV upgrade. Partial Wave Analysis (PWA) is the technique used for that analysis. The first PWA results have been published and more PWA results are progressing in several channels. The main work is in developing and upgrading new techniques of amplitude and partial wave analysis.

构成每个原子核的中子和质子本身是由称为夸克和胶子的组成粒子组成的，它们通过我们所说的强核力结合在一起。该奖项支持对物质基本成分之间强相互作用的研究。更具体地说，它旨在理解被称为量子色动力学（QCD）的强作用力理论的性质，在原子核形成的能量上，这是最相关的。为此，PI和该奖项支持的学生将在弗吉尼亚州纽波特纽斯的托马斯杰斐逊国家加速器设施（杰斐逊实验室）进行实验。NSU的教师和本科生将参与硬件建设和中能核物理前沿实验数据分析。诺福克州立大学是历史上领先的黑人学院和大学之一。NSU的非裔美国物理学专业毕业生比弗吉尼亚其他所有大学的总和还要多。该项目的目标是加强全国少数民族大学生对核物理和粒子物理研究的参与。近年来，QCD （Lattice-QCD）的数值解提供了光-质量介子的质谱。因此，现在是时候改进我们对鲜为人知的光-质量介子谱的实验测定，以便与预测进行比较。由于强相互作用的载体胶子对强相互作用很敏感，因此胶子也有可能在介子谱中作为外来介子（由夸克、反夸克和胶子组成的粒子）从外部观察到。介子光谱的一个主要问题是：我们能在介子光谱中找到胶子的线索吗？PI正在分析由杰斐逊实验室B厅的CEBAF大接受度光谱仪（CLAS）进行的介子光谱实验数据，以寻找这些线索。他还参与了杰斐逊实验室12gev升级的两个名为GlueX和CLAS12的新实验。分波分析（PWA）是用于这种分析的技术。第一个PWA结果已经公布，更多的PWA结果正在通过几个渠道取得进展。主要工作是发展和改进振幅和部分波分析的新技术。