# The 2009 Europhysics Conference on High Energy Physics

Jul 16 – 22, 2009
Kraków, Poland
Europe/Warsaw timezone

## Hadronic b -> c decays at Belle

Jul 18, 2009, 11:00 AM
15m
Large Lecture - Hall A (Kraków, Poland)

### Large Lecture - Hall A

#### Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
Flavour Physics

### Speaker

Jaroslaw WIECHCZYNSKI (Institute of Nuclear Physics PAN, Krakow)

### Description

Study of $B \to D_s^* h$ decays We report a measurement of the branching fractions for $B^0 \to D_s^* h$ decays using a large sample of $B\bar{B}$ decays collected with the Belle detector at the KEKB asymmetric energy $e^+e^-$ collider. Improved measurements of $B \to D_s K$ and $B \to D_s\pi$ branching fractions We report improved measurements of the $B\to D_s K$ and $B\to D_s\pi$ branching fractions. The results are based on a large data sample recorded at the $\Upsilon$(4S) resonance by the Belle experiment at the KEKB asymmetric energy $e^+ e^-$ collider. Measurement of $B \rightarrow D_s^{(*)} K\pi$ branching fractions We report a measurement of the exclusive $B^+$ meson decay to the $D_s^{(*)-} K^+\pi^+$ final state using $657 \times 10^{6} B\bar{B}$ pairs collected at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider. We use $D_s^{*-}\to D_s^-\gamma$ and the $D_s^-\to \phi\pi^-$, $\bar{K}{}^*(892)^0 K^-$ and $K^0_S K^-$ decay modes for $D_s^{(*)}$ reconstruction to measure the following branching fractions: ${\cal B}(B^+\to D_s^-K^+\pi^+)$ and ${\cal B}(B^+\to D_s^{*-}K^+\pi^+)$. Measurement of $B \to D_s K^0_s\pi$ and $B \to D_s K K$ branching fractions We report a measurement of the exclusive $B$ meson decay to the $D_s K^0_s\pi$ and $D_s KK$ final states using $657 \times 10^{6} B\bar{B}$ pairs collected at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider.

### Primary author

Jaroslaw WIECHCZYNSKI (Institute of Nuclear Physics PAN, Krakow)

 Slides