Factorization and Quark Imaging in Exclusive Reactions

排他反应中的因式分解和夸克成像

• 批准号: 1019521
• 负责人: Tanja Horn
• 金额: $ 30.62万
• 依托单位: Catholic University of America
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-07-01 至 2014-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1019521&HistoricalAwards=false
• 关键词: Factorization; Quark; Imaging; Exclusive; Reactions

This project covers a research program of fundamental importance for our understanding of the structure of matter and the origin of mass. The focus is on experimental investigations of hadron structure through exclusive production and detection of a single meson or photon. Such processes allow us to gain both a quantitative description and a visualization (tomographic image) of the behavior of strongly interacting systems. This is achieved through the language of Generalized Parton Distributions (GPDs), which can be measured in a regime where the hard scattering of the probe on a single quark can be factorized from the residual soft interaction that carries the information about the GPDs. Thus, tests of factorization in the kinematics of Jefferson Lab, both today and after the 12 GeV energy upgrade, are essential for the interpretation of GPD data, and in turn for our understanding of nucleon structure.The participation of postdoctoral researchers, graduate students, and undergraduate students is an integral part of the project, providing young scientists with opportunities to further their training and education. These will include learning nuclear physics concepts, getting hands-on experience in development of hardware and software, as well as participating in and contributing to cutting edge experiments at a major national laboratory, providing exposure to a broad international scientific community. The PI has considerable experience working with minority students, and by providing a female role model, she could encourage women to pursue advanced studies in physics.

这个项目涵盖了一个对我们理解物质结构和质量起源具有重要基础意义的研究项目。重点是通过单独产生和探测单个介子或光子对强子结构进行实验研究。这样的过程使我们能够获得强相互作用系统行为的定量描述和可视化（层析图像）。这是通过广义Parton分布（gpd）的语言实现的，它可以在一个区域进行测量，其中探针在单个夸克上的硬散射可以从携带gpd信息的剩余软相互作用中分解出来。因此，在今天和12 GeV能量升级之后，杰斐逊实验室运动学的分解测试对于解释GPD数据至关重要，反过来又有助于我们对核子结构的理解。博士后研究人员、研究生和本科生的参与是该项目的一个组成部分，为青年科学家提供进一步培训和教育的机会。这将包括学习核物理概念，获得硬件和软件开发的实践经验，以及参与并参与主要国家实验室的尖端实验，提供接触广泛的国际科学界的机会。这位PI在与少数族裔学生打交道方面有着丰富的经验，通过提供一个女性榜样，她可以鼓励女性在物理学方面进行更深入的研究。