Xiangdong Ji is the Chair Professor, Dean of Department of Physics, Shanghai Jiao Tong University and a Changjiang Chair Visiting Professor at Peking University. Since 1996, he has been on the faculty at the University of Maryland, College Park and been the chairman of Maryland Center for Fundamental Physics. He is a fellow of American Physical Society and a recipient of the 2003 oversea outstanding young Chinese scientist award from the National Science Foundation of China. Since 2007, he is vice director of the Center for High Energy Physics, Peking University. He has been a member of the Nuclear Science Advisory Committee (NSAC), the chairman of the Long Rang Plan Working Group Members, a member of the Jefferson Lab Program Advisory Committee (PAC), a member of the Tom W. Bonner Prize in Nuclear Physics Selected Committee. He had been one of the editors of the European Physical Journal A (Particle and Nuclear Physics), a member of the advisory committee to the Institute for Nuclear Theory, and the chairman of the Gordon Research Conferences (Nuclear Physics).
Professor Ji is an expert on nuclear and high energy physics. He published more than 120 papers. 15 of them are published on the Physical review letters. His papers have been cited more than 6000 times. One single paper has been cited more than 1000 times. He is focusing on nuclear physics, proton and neutron’s structure, QCD, theories beyond the Standard Model and cosmology. He found Ji’s sum rule which links the generalized parton distribution functions (GPDs) to the angular momentum contributions of quarks and gluons. The GPDs extend the well-known Feynman parton distribution functions and electromagnetic form factors of the nucleon to new kinematic dimensions. It can be accessed through Deeply Virtual Compton Scattering. Professor Ji is currently the spokesperson and project leader for the PandaX dark matter search experiment in China’s JinPing Deep-Underground Lab in Sichuan, China. PandaX experiment uses the liquid Xe as the detection medium for WIMPs (weekly interacting massive particles). The initial phase of the experiment consisting of 25kg fiducial mass will be deployed in the end of 2012.
Neutrino Masses and Mixings, Leptogenesis: Neutrinos are weakly-interacting particles, which are passing through our body in billions in a second. Neutrinos are found to have a tiny amount of mass (about one-millionth of that of an electron), which might reflect an interesting origin. They come in different flavors and oscillate among them as they travel. Right-handed neutrinos might be the key for the existence of ordinary matter in the universe throught the so-called Leptogenesis. Sterile neutrinos might be also a viable condidate for dark matter.
Quantum Chromodynamics and Physics of Strong Interactions: The strong force binds together the quarks and gluons to form protons and neutrons—the main constituents of atomic nuclei. The strong interactions account for the bulk of the mass of ordinary matter and are responsible for formation of the basic elements.