报告人简介：
Lanqing Yuan is an experimental particle physicist focused on dark matter direct detection. He is an incoming postdoctoral researcher at Washington University in St. Louis and earned his Ph.D. from the University of Chicago (2025). During his Ph.D., he led detector response analysis in the XENONnT dark matter experiment, resulting in four Physical Review Letters publications highlighted by Editors’ Suggestions. He convened the Computing and Analysis Tools Group for the 200-scientist XENON collaboration, for which he was awarded the XENON medal in 2024, the highest honor from XENON collaboration. He holds a B.S. from ShanghaiTech University (2020), where he started research in X-ray coherent diffraction imaging under Prof. Huaidong Jiang.

讲座摘要：
XENONnT, a dual-phase xenon time-projection chamber, is one of the leading experiment in search for Weakly Interacting Massive Particles (WIMPs) and many other search for rare events. With dedicated analysis techniques that lower energy threshold, we can significantly enhance the sensitivity of searches for dark matter with few GeV mass. We search for dark matter (DM) with a mass [3, 12] GeV using an exposure of 3.51 tonne × year with the XENONnT experiment. In the considered mass range, the DM sensitivity approaches the "neutrino fog", the ultimate limitation for DM direct detection experiments where neutrinos produce a signal that is indistinguishable from that of light DM-xenon nucleus scattering.

邀请人：薛加民