# EPS HEP 2013 Stockholm

17-24 July 2013
KTH and Stockholm University Campus
Europe/Stockholm timezone

## New particles at Belle

18 Jul 2013, 11:30
15m
D1 (KTH Campus)

### D1

#### KTH Campus

Talk presentation Flavour Physics and Fundamental Symmetries

### Speaker

Tomoko Iwashita (Nara Women's Univ.)

### Description

It has been nearly ten years since the narrow $X(3872)$ state has been discovered in charged $B$ decays by the Belle experiment and its nature still remains unclear. To provide further insight on its properties, we report the search for the $X(3872)$ in the decays $B \to X(3872) K \pi$, $X(3872) \to J/\psi \pi^+ \pi^-$. The analysis is based on full data sample collected at the $\Upsilon(4S)$ with the Belle detector at the KEKB collider.

### Primary author

Prof. Youngjoon Kwon (Yonsei University)

 Slides