学术报告（2025年6月10日10:00）：LHC寻找具有位移顶点和喷注的长寿命粒子的现象学研究

主持人：李浩林 副教授

报告简介：Searching for long-lived particles has become an important research direction in the quest for physics beyond the Standard Model, e.g. the LHC experiments have reported multiple such searches. In the first part of this talk, I will discuss how to recast a recent ATLAS search for displaced vertices plus jets and reinterpret the obtained bounds in terms of an axion-like particle with quark flavor violation and various benchmark scenarios of dark scalars. In the second part, I will focus on long-lived heavy neutral leptons (HNLs) from top-quark decays in the theoretical framework of sterile-neutrino-extended Standard Model Effective Field Theory, showing why the ATLAS DV+jets search fails in this case and how we may modify the search to constrain the scenario. The sensitivity reach of proposed LHC far detectors to such HNLs will also be discussed.

报告人简介： Zeren Simon Wang is an associate researcher at the School of Physics, Hefei University of Technology. Previously he worked as a postdoctoral researcher at the Asia Pacific Center for Theoretical Physics and at the Department of Physics, Taiwan Tsing Hua University. He obtained Ph.D. at the University of Bonn. He has published more than 40 research papers in journals including JHEP, PRD, and EPJC, and served as a referee for these and other journals.