Abstract:

The electric charge is quantized in the standard model. However, particles with non-quantized electric charge, often referred to as millicharged particles, exist in a variety of new physics models beyond the standard model. In this talk, I will discuss the theoretical models in which millicharged particles can naturally occur, and the experimental searching methods. Although a number of terrestrial searches have been carried out for millicharged particles, significant millicharge is still allowed for mass larger than 100 MeV. We found that electron colliders, e.g. BESIII or Belle-II, can probe these unexplored parameter regions above 100 MeV.

About the speaker:

劉佐偉博士于2003年複旦大學本科畢業，2008年美國東北大學博士畢業，2008-2011年在紐約州立大學石溪分校做博士後研究，2011-2014年在加拿大麥吉爾大學做博士後研究，2014-2016年在清華大學任副研究員，2016年至今在南京大學任教授。2014年入選海外高層次青年人才。主要研究領域是粒子物理理論。長期從事暗物質的理論和唯象學研究，以及粒子對撞機上超出标準模型的新物理研究。