U.S.-Pakistan Collaboration on Hadron Substructure at High Energies

项目描述：本项目为巴基斯坦伊斯兰堡Quaid-I- Azam大学物理系Pervez Hoodbhoy博士提供旅费和生活费。麻省理工学院的John W. Negele和Robert L. Jaffe。该项目将在量子色动力学（QCD）领域，夸克和胶子在决定强子和原子核的结构和性质方面的作用。这个领域已经被麻省理工学院的理论物理小组研究了一段时间。联合研究的广泛问题包括：发展包含已知QCD约束的核子模型；核子的自旋结构；夸克-胶子复合体系弹性散射形状因子的计算各种反应中夸克的直接激发和色自由度强子靶极高能深度非弹性电子散射中夸克动量的直接测量以及在相对论重离子碰撞中创造强子物质的异常状态并检测它们的特征。范围：该项目扩展了巴基斯坦科学家与麻省理工学院小组的合作，这种合作始于20世纪80年代末，并产生了许多联合出版物。过去的合作在该领域取得了重大成果，并提高了QAU小组进行研究和发表文章的能力。此外，两国还进行了科学家和研究生的交流。该项目符合发展中国家科学计划的目标。

Description: This project supports the travel and living expenses for Dr. Pervez Hoodbhoy of the Department of Physics, Quaid-I- Azam University (QAU) in Islamabad, Pakistan, to participate in a research project with Drs. John W. Negele and Robert L. Jaffe at the Massachusetts Institute of Technology, Cambridge. The project will be in the area of quantum chromodynamics (QCD), the role of quarks and gluons in determining the structure and properties of hadrons and nuclei. This area has been subject of research by the theoretical physics group at MIT for some time. Broad issues of the joint research include: development of nucleon models incorporating known constraints imposed by QCD; spin structure of the nucleon; calculation of elastic scattering form factors for composit systems of quarks and gluons; direct excitation of quark and color degrees of freedom in various reactions; direct measurements of quark momentum in very high energy deeply inelastic electron scattering from hadron targets; and creation of abnormal states of hadron matter and detecting their signatures in relativistic heavy ion collisions. Scope: This project extends collaboration, by the Pakistani scientist with the MIT group, that has started in the late 1980's and that has resulted in a number of joint publications. The past collaboration produced significant results in the field and enhanced the capability of the QAU group to conduct research and to publish. In addition, there has been exchange of scientists and garduate students between the two groups. The project meets the objectives of the Science in Developing Countries program.