Research in Strong-Interaction Theory

强相互作用理论研究

• 批准号: 9800964
• 负责人: Bunny Clark
• 金额: $ 75万
• 依托单位: Ohio State University Research Foundation -DO NOT USE
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-08-01 至 2002-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9800964&HistoricalAwards=false
• 关键词: Research; Strong; Interaction; Theory

***9800964Clark Understanding the formation of matter in the universe requires a deep understanding of atomic nuclei. Quantum Chromodynamics (QCD), the relativistic field theory of quarks and gluons, is believed to be the underlying theory of the strong force and therefore of nuclei. However, QCD is extremely complex and is largely unsolved at the low energies relevant for describing ordinary nuclei and their constituents. Attacks on this problem from several perspectives are proposed. The "simplest" bound systems of the strong interaction are nucleons (protons and neutrons) and mesons, of which nuclei are composed. A direct attack on solving QCD for these systems is being mounted using new light-front field theory techniques pioneered at Ohio State. Finding quarks and gluons in ordinary nuclear phenomena is a great challenge. A path from QCD to nuclei is being constructed using "effective field theory" methods, which provide equivalent, but tractable descriptions of QCD in terms of low-energy particles. Contact with experiment is made using relativistic descriptions of nuclear reactions and structure. This work bridges the gap between nuclear phenomena and QCD by providing tools for the analysis of experiments, which then feed back to the further understanding of the nucleus and its substructure.

* 9800964克拉克理解宇宙中物质的形成需要对原子核有深刻的理解。 量子色动力学（QCD），夸克和胶子的相对论场论，被认为是强作用力的基础理论，因此也是原子核的基础理论。 然而，QCD是非常复杂的，在描述普通核及其组分的低能下，它在很大程度上是未解的。 从几个角度提出了对这个问题的攻击。强相互作用的“最简单”束缚系统是核子（质子和中子）和介子，原子核由它们组成。 一个直接的攻击，解决这些系统的QCD正在安装使用新的光前场理论技术开创了俄亥俄州。 在普通的核现象中寻找夸克和胶子是一个巨大的挑战。 一条从QCD到原子核的路径正在使用“有效场论”方法构建，该方法提供了等价的，但易于处理的低能粒子QCD描述。与实验的联系是使用相对论的核反应和结构的描述。 这项工作通过提供实验分析的工具，弥合了核现象和QCD之间的差距，然后反馈到对核及其子结构的进一步理解。