# ICHEP2018 SEOUL

Jul 4 – 11, 2018
COEX, SEOUL
Asia/Seoul timezone

## Light meson decays at BESIII

Jul 7, 2018, 4:55 PM
20m
101 (COEX, Seoul)

### 101

#### COEX, Seoul

Parallel Strong Interactions and Hadron Physics

### Speaker

guofa xu (Institute of High Energy Physics)

### Description

At present the world's largest sample of 1.3 billion J/psi decay has been collected by the BESIII detector, which provides a unique opportunity to investigate light meson decays. The $a^0(980)-f^0(980)$ mixing is an important probe to the nature of those two light scalars. The first observation of $a^0(980)-f^0(980)$ mixing will be reported. The $\eta$ and $\eta'$ hadronic decays are sensitive tools for the investigations of $\pi-\pi$ and $\eta-\pi$ interactions, symmetry breaking, and for testing the Chiral Perturbation Theory. In this talk, BESIII presents new results on amplitude analyses of the Dalitz decays $\eta'\to 3 \pi; \eta' \to \eta \pi \pi, \eta'\to \gamma \pi \pi$, on the observation of new decay modes and on searches for rare or forbidden decays.

### Presentation materials

 ICHEP_xugf.pdf Light meson decays_xugf.pdf