On the morning of April 14, 2026, the 11th IOPP Colloquium was successfully held at Lecture Hall 9409 of the Institute of Particle Physics (IOPP), Central China Normal University. Professor Xiaorui Lyu from the University of Chinese Academy of Sciences (UCAS) was invited to deliver an academic talk titled "Study on the Charmed Baryons with Novel Technology in the BESIII Experiment."

Professor Lyu's talk systematically reviewed the history of heavy flavor baryon physics, highlighting the BESIII experiment's precise measurement of the absolute branching fractions of Λc+ using the double-tag technique at threshold energies, which achieved significantly improved precision over previous experiments. He also showcased the observation of rare processes like Λc+ →ne+ve assisted by machine learning in semileptonic decays, as well as findings from partial wave analysis in hadronic decays. Furthermore, he introduced the TF-PWA software package independently developed by BESIII and discussed how future higher-statistics data from the BEPCII upgrade would advance charmed baryon physics.

During the discussion session, Professor Lyu exchanged views with young scholars on non-perturbative QCD effects in charmed baryon decays, cutting-edge applications of machine learning in particle data analysis. He emphasized that BESIII's threshold energy research provides a unique experimental perspective for understanding the structure and weak decay mechanisms of heavy flavor baryons.

The IOPP Colloquium is a series of academic activities organized by the Institute of Particle Physics, designed to provide both popular science insights and academic inspiration to all IOPP faculty and students, aiming to foster a vibrant research and collaborative atmosphere. This talk showcased the frontier intersection of experimental particle physics and hadron theory, offering a valuable learning opportunity for attendees and reinforcing the IOPP's academic vision of "international collaboration and interdisciplinary research."

Professor Hang Yin, Deputy Director of IOPP, presented Professor Xiaorui Lyu with 
the 11th IOPP Colloquium Commemorative plaque

Professor Xiaorui Lyu is a Distinguished Professor at UCAS and a Distinguished Professor under the Ministry of Education’s High-Level Talent Program. He has served as Principal Investigator (PI) of a project under the National Key R&D Program of China and received funding from the Excellent Young Scientists Fund of the National Natural Science Foundation of China. For many years, he has conducted physics research in the BESIII experiment at IHEP and the LHCb experiment at CERN. In the BESIII Collaboration, he has served as Chair of the Speakers’ Bureau, Physics Coordinator, and Co-Spokesperson. Currently, he is a member of the Executive Committee and Chair of the Membership Committee of the BESIII Collaboration, as well as the Team Leader of the UCAS LHCb Group.

Group Photo of the 11th IOPP Colloquium

Correspondent: Xiangyu Shui
Proofreader: Hang Yi