学术报告（11月17日下午14:00-15:00）

主持人：尤郑昀 教授

欢迎广大师生积极参加！

Abstract：

The BESIII Experiment at the Beijing Electron Positron Collider (BEPCII) has accumulated the world's largest samples of $e^+e^-$ collisions in the tau-charm region. Based on the samples taken at $\psi(3770)$ peak, around the $\psi(4040)$ nominal mass, and at the $\Lambda^+_c\Lambda^-_c$ mass threshold 4.6 GeV, we can study the charmed hadron decays under a uniquely clean background. In this talk, we will review the recent results on the $D$, $D_s$ and $\Lambda_c$ decays, such as the analyses of the purely leptonic and semi-leptonic decays of D meson, the measurements on strong phase and $D^0-\bar{D}{}^0$ mixing parameters using quantum coherence at threshold, $D$ Dalitz analyses, determination on the absolute branching fraction of $\Lambda_c$ hadronic decays and first model-independent study on the semi-leptonic $\Lambda_c$ decay rate $\mathcal{B}(\Lambda_c^+ \to \Lambda e^+ \nu$). In the final remarks, the future prospects will be discussed.

报告人简介：

吕晓睿博士2002年本科毕业于北京大学物理系，2005年在北京大学获得理论物理硕士学位，2008年在日本东京工业大学获得基础物理博士学位，之后加入中国科学院大学高能物理组，现为教授、博士生导师。他的研究方向集中在通过实验手段理解粒子的基本结构与相互作用，从而研究物质的起源。他目前参加了BEPCII上的北京谱仪III实验和瑞士CERN的LHCb实验，并担任BESIII合作组物理协调人。

About speaker:

Dr. Xiao-Rui Lyu completed the undergraduate and master course in Peking University, before he moved to Tokyo Institute of Technology, Japan, and obtained doctor degree in fundamental physics in 2008. Afterward, he joined the experimental high energy group in the University of Chinese Academy of Sciences. His research effort focuses on to understand the origin of the world by the experimental probe to the fundamental structure and their interactions of particles. He works in the BESIII project in BEPCII facility in China, and the LHCb project in CERN in Switzerland. He is now physics coordinator of the BESIII collaboration.