主 讲 人 ：尧江明    教授

活动时间：03月26日15时00分    

地      点 ：理科2号楼B409

讲座内容：

Charge-parity (CP) violation is a key ingredient in resolving the matter-antimatter asymmetry of the universe. However, the CP violation predicted by the Standard Model is too small to explain the observed baryon asymmetry, suggesting the need for new CP-violating mechanisms beyond the Standard Model. A measurable permanent electric dipole moment (EDM) in elementary or composite particles—such as neutrons, nuclei, atoms, or molecules—would provide direct evidence of such new physics. As a result, the search for EDMs has become a major focus in particle, nuclear, and atomic physics. Extensive experimental efforts have been dedicated to measuring atomic EDMs, which primarily originate from nuclear Schiff moments—quantities that depend on nuclear structure calculations. These Schiff moments arise from parity- and time-reversal-violating (PT-odd) nucleon-nucleon interactions, making atomic EDM measurements a powerful probe of low-energy constants governing PT-odd nuclear forces. Thus, precise calculations of nuclear Schiff moments are essential for connecting atomic EDM measurements to fundamental CP-violating interactions. However, current theoretical predictions suffer from significant model uncertainties. In this talk, I will present a beyond-mean-field study of nuclear Schiff moments in three experimentally relevant diamagnetic atoms—129Xe, 199Hg, and 225Ra—using state-of-the-art multireference covariant density functional theory. Our results highlight the critical role of high-lying excited intermediate states and shape-mixing effects in determining nuclear Schiff moments.

主讲人介绍：

尧江明，中山大学物理与天文学院教授。2004年获得南开大学学士学位， 2009年获得北京大学粒子物理与核物理专业博士学位。先后在西南大学、布鲁塞尔自由大学、日本东北大学、北卡罗来纳大学教堂山分校和密歇根州立大学从事科研工作。2021年入职中山大学担任全职教授。尧教授主要从事原子核结构与衰变等方面课题研究，先后发展了原子核多参考态协变密度泛函理论以及介质生成坐标方法，并将其应用于原子集体激发以及无中微子双贝塔衰变等课题研究，首次在手征有效场论框架下实现了候选核无中微子双贝塔衰变核矩阵元的从头计算。在Physical Review Letters，Physics Letters B, Physical Review C等主流物理期刊上发表论文100余篇，受邀在Progress in Particle and Nuclear Physics期刊撰写相关综述论文。