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PKU HEP Seminar and Workshop (北京大学高能物理组)

# Charmed hadron decays at BESIII

## by Prof. Xiao-Rui Lyu (University of CAS)

Thursday, September 21, 2017 from to (Asia/Shanghai)
at CHEP ( B105 )
School of Physics, PKU
 Description 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. 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. He also serves for many high-profile academic groups and committees, such as the working group of HFLAV (previously HFAG) and a series of CKM conferences.  Participants Wei Ankang; Qing-Hong Cao; Junjie Cao; ning chen; Xu Feng; chang gong; Qiang Li; Fengyun Li; Yandong Liu; Yunfei Long; Xudong Lv; Xiao-Rui Lyu; Bo-Qiang Ma; Qiaorong Shen; Yuxuan Wang; Mengzhen WANG; Dayong Wang; Teng Xiang; liye xiao; Liu Xiaonan; kepan xie; Lvcheng Xie; Ling-Xiao Xu; yongqi xu; Jiao Zhang; Jue Zhang; Rui Zhang; Ce Zhang; Junjie Zhao; Yi Zheng; S L Zhu; 律 吕; 世平 和; 国晋 曾; 李林 杨; 雪丽 缪; 浩然 蒋