U.S.-Korea Cooperative Research: Measurements of 5th Structure Function for Single Pion Electro-Production In the Delta(1232) Resonance Region

该奖项为康涅狄格大学物理系的Kyungseon Joo教授和韩国庆北国立大学物理系的Wooyoung Kim教授之间为期三年的国际合作研究项目提供了资助。与朱教授一起工作的研究生和博士后将参与合作研究并前往韩国。朱博士的主要研究重点是核子共振的电磁激发。这一领域的物理研究旨在了解核子的内部结构和动力学，并解决有关亚核子自由度的长期问题。这是强子物理中的一个重要问题。只有存在足够信息的孤立能量才能进行完全依赖于模型的分析。这项合作研究的具体目标是确定特定共振区域“delta-1232”中单个介子电子的第五种结构函数（sigma-LT-prime）。为了实现这一目标，Joo博士和他的合作者将利用弗吉尼亚州杰斐逊国家加速器设施的电子束大接受谱仪，这是唯一适合研究核子共振物理的仪器。他们获得的测量结果将提供共振项和非共振项之间干涉的重要信息，并有助于在强量子色动力学的框架下理解核子的结构。更广泛的影响这次合作加强了美国两个非常活跃的研究小组之间的联系。和韩国拥有互补的专业知识。它还加强了对基础物理前沿领域年轻物理学家的培训，这对保持该领域的强大至关重要。康涅狄格大学的研究生和博士后通过访问金教授在韩国的研究小组，获得了国际研究经验。金教授的研究得到了韩国科学财团（KOSEF）的支援，因此可以分担研究费用。

OISE-0424533JooThis award facilitates a three-year international collaborative research project between Professor Kyungseon Joo of the Physics Department of the University of Connecticut and Professor Wooyoung Kim of the Physics Department of Kyungpook National University in Korea. A graduate student and post-doctoral fellow working with Professor Joo will participate in the collaborative research and travel to Korea.Intellectual MeritThe main focus of Dr. Joo's research is in electromagnetic excitation of nucleon resonances. This area of physics research is aimed at understanding the internal structure and dynamics of the nucleon and addressing long-standing questions about the relevant sub-nucleon degrees of freedom. This is one of the important problems in hadron physics. There are only isolated energies where enough information exists to make a completely model-dependant analysis. The particular goal of this collaborative research is to determine the fifth structure function (sigma-LT-prime) for single pion electron in the specific resonance region "delta-1232." To accomplish this, Dr. Joo and his collaborator will make use of the electron beam Large Acceptance Spectrometer of the Jefferson National Accelerator Facility in Virginia, which is uniquely suited for study of nucleon resonances physics. The measurements they obtain will provide important information about the interference between resonant and non-resonant terms and help to understand the structure of nucleon in the framework of strong Quantum Chromodynamics. Broader ImpactsThis collaboration strengthens the links between two very active research groups in theU.S. and Korea that have complementary expertise. It also enhances the training of youngphysicists in a frontier area of fundamental physics, which is important to keep the fieldstrong. A graduate student and a postdoctoral fellow from the University of Connecticut gain international research experience by visiting Professor Kim's research group in Korea. The cost of this research is shared because Professor Kim's research is supported by the Korean Science and Engineering Foundation (KOSEF).