# Europhysics Conference on High-Energy Physics 2011

Jul 20 – 27, 2011
Alpes Congrès - Alpexpo
Europe/Paris timezone

## Direct CPV and charmless B decays at Belle

Jul 21, 2011, 11:45 AM
15m
Oisans (Alpes Congrès - Alpexpo)

### Oisans

#### Alpes Congrès - Alpexpo

Parallel session talk Flavour Physics and Fundamental Symmetries

### Speaker

Dr Paoti Chang (NTU, Taipei)

### Description

We report the measurements of branching fractions and direct $CP$ asymmetries for neutral $B$ meson decays to the $hh$ final states, where $h$ stands for a pion or a kaon. We also study the charged $B$ meson decays into one charged and one neutral kaon or pion. We present improved measurements of the branching fraction and the $CP$ asymmetry of $B\to\eta h$. Here $h$ denotes $\pi^{\pm}$, $K^{\pm}$ or $K^0_S$, and the $\eta$ is reconstructed through the decay channels $\eta\to\gamma\gamma$ and $\eta\to\pi^+\pi^-\pi^0$. We report the results of a search for the charmless hadronic decay $B^+ \to \omega\rho^+$. These analyses are performed using the large data sample collected with the Belle detector near the $\Upsilon(4S)$ resonance at the KEKB asymmetric $e^+e^-$ collider.

### Primary author

Dr Paoti Chang (NTU, Taipei)

### Presentation materials

 Transparents