Hard Scattering Processes in QCD

QCD 中的硬散射过程

• 批准号: 1205942
• 负责人: Andreas Metz
• 金额: $ 24万
• 依托单位: Temple University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-06-01 至 2015-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1205942&HistoricalAwards=false
• 关键词: Hard; Scattering; Processes; QCD

This project consists of theoretical research dealing with semi-inclusive and exclusive scattering processes in the region of intermediate to high energies, with a particular emphasis on polarization phenomena. The study of such reactions has attracted considerable interest during recent years as they allow one to explore for the first time the three-dimensional parton structure of the nucleon, and to investigate a set of new, intriguing, and nontrivial questions related to perturbative quantum chromodynamics (QCD). The research program mainly addresses two key topics: first, new ways for exploring the underlying physics of single spin phenomena in high energy processes will be outlined. Second, it will be studied in detail how the three-dimensional gluon structure of the nucleon, both in momentum space and in position space, can be deciphered. In order to carry out this program a number of conceptual model-independent investigations as well as numerical/phenomenological studies will be used. The project is directly related to ongoing and planned measurements in lepton hadron collisions at the Jefferson Laboratory (JLab) in Newport News, VA, and in proton proton collisions at the Relativistic Heavy Ion Collider (RHIC) in Brookhaven, NY. In the future, a potential new Electron Ion Collider (EIC) will also address this physics. These activities will help us to better understand the structure of protons and neutrons at unprecedented levels of detail and with new ways of visualizing the scientific basis for that understanding. Graduate students will be involved in this very active field at the frontier of current hadronic physics.

该项目包括处理中高能量区域的半包容性和排他性散射过程的理论研究，特别强调偏振现象。 近年来，对此类反应的研究引起了人们极大的兴趣，因为它们使人们首次探索核子的三维部分子结构，并研究一系列与微扰量子色动力学（QCD）相关的新的、有趣的和重要的问题。 该研究计划主要涉及两个关键主题：首先，将概述探索高能过程中单自旋现象的基础物理的新方法。 其次，将详细研究如何破译核子在动量空间和位置空间中的三维胶子结构。 为了执行该计划，将使用许多独立于概念模型的研究以及数值/现象学研究。 该项目与弗吉尼亚州纽波特纽斯的杰斐逊实验室 (JLab) 正在进行和计划中的轻子强子碰撞测量以及纽约布鲁克海文相对论重离子对撞机 (RHIC) 的质子质子碰撞测量直接相关。 未来，潜在的新型电子离子对撞机（EIC）也将解决这一物理问题。这些活动将帮助我们以前所未有的细节水平更好地理解质子和中子的结构，并以新的方式可视化这种理解的科学基础。 研究生将参与当前强子物理学前沿的这个非常活跃的领域。