学术报告：Mass, Spin and 3-d Structure of the Nucleon
报告题目：Mass, Spin and 3-d Structure of the Nucleon
报告人：Jian-ping Chen (陈剑平) （Jefferson Lab, Virginia, USA）
The nucleons (protons and neutrons) are responsible for most of the mass of the visible matter in the universe. Contrary to the conventional wisdom, Higgs Mechanism is not the main mechanism responsible for the nucleon mass. How the global properties of the nucleon, such as mass and spin, emerge from its internal structure and dynamics and how they can be experimentally studied are the focus of this talk. The internal structure of the nucleon is mostly governed by the strong interaction. Although a successful theory (QCD) to describe the strong interaction was established 40 years ago, our understanding of the strong interaction in its truly strong region is still very limited. Understanding nucleon’s 3-d internal structure and the strong interaction in the strong region is the new frontier of the modern high-energy nuclear physics. Electron scattering and electron-ion colliding have been the most powerful and precise tools in this study. An overview of the progress and selected highlights will be presented. Physics programs at Jefferson Lab and at possible future electron-ion colliders will be discussed.
Chen, Jian-ping (陈剑平):
• Senior Staff Scientist, Jefferson Lab, 2011-now;
• Staff Scientist, Jefferson Lab, 1994-2011;
• Postdoc, MIT, 1992-1994; Postdoc, U. Virginia,1990-1992;
• Ph.D., U. Virginia, 1990; B.Sc., USTC, 1982.
• APS Fellow, 2008.
• Guest Professor, University of Science and Technology of China, Institute of Modern Physics and Hefei University of Technology;
• Spokesperson of many JLab experiments;
• Project manager/leader for several large hardware and physics projects, including the JLab polarized 3He target system which has the world-best performance in terms of figure-of-merit and the planned large detector SoLID project.
• Chair of PAC, HiGS @TUNL;
• Chair/member of organizing/advisory committees for many international conferences;
• Published over 200 papers; Presented over 100 invited talks;
• Research interests: experimental study of high-energy nuclear/hadron physics.