Hard Scattering Processes in QCD

该项目包括理论研究，涉及中高能区域的半包容性和排他性散射过程，特别强调极化现象。 近年来，对这类反应的研究引起了相当大的兴趣，因为它们首次使人们能够探索核子的三维部分子结构，并研究了一系列与微扰量子色动力学（QCD）有关的新的、有趣的和非平凡的问题。 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潜在物理的新方法。 其次，将详细研究如何在动量空间和位置空间中破译核子的三维胶子结构。 为了执行这个计划，将使用一些概念模型独立的调查以及数值/现象学研究。 该项目直接关系到正在进行的和计划中的测量轻子强子碰撞在杰斐逊实验室（JLab）在纽波特纽斯，弗吉尼亚州，并在质子质子碰撞在相对论重离子对撞机（RHIC）在布鲁克海文，纽约州。 在未来，一个潜在的新的电子离子对撞机（EIC）也将解决这一物理问题。这些活动将帮助我们更好地了解质子和中子的结构在前所未有的详细程度和新的方式可视化的科学基础的理解。 研究生将在当前强子物理学的前沿参与这个非常活跃的领域。

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.