# EPS HEP 2015

22-29 July 2015
Europe/Vienna timezone

## Charmed hadron decays at BESIII

Jul 24, 2015, 3:30 PM
15m
HS21

### HS21

talk Flavour Physics and Fundamental Symmetries

### Speaker

Liaoyuan Dong (BESIII)

### 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 $\psi(3770)$ and $\psi(4010)$ peaks, we present the purely leptonic and semi-leptonic decays of D meson, the Dalitz analysis of $D^+\to K_s \pi^+ \pi^0$ and $D^0\to K_sK^+K^-$, the $K^-\pi^+$ and $K_s\pi^+\pi^-$ strong phases, the D0-D0bar mixing parameter $y_{CP}$, and $D_s$ decays involving $\eta’$. In addition, BESIII collected 506/pb sample at $\sqrt{s}$ = 4.6 GeV, which allows us to perform the double-tag technique to measure the rates in the model-independent way near threshold for the first time. Herein, we present our analysis results on branching fractions for 12 $\lambda_c^+$ hadronic decays, including BF($\lambda_c^+ \to p K^-\pi^+$). In addition, we will present the results of the semi-leptonic decay BF($\lambda_c^+ \to \lambda e^+ \nu$).