Speaker
Description
We report the first search for the penguin-dominated process $B_{s} \to \eta^{\prime} X_{s\bar{s}}$ using a semi-inclusive method. In absence of a statistically significant signal, we set a 90\% confidence-level upper limit $1.4 \times 10^{-3}$ on the partial branching fraction where $M(X_{s\bar{s}}) \leq 2.4\,{\rm GeV}$. We also report final results for the $B^{0}_{s} \to D_{s} X$ and $B^{0}_{s} \to \eta \eta^{\prime}$ decays. These results are obtained using $121.4\,{\rm fb}^{-1}$ data collected at the $\Upsilon(5S)$ resonance by the Belle experiment at the KEKB asymmetric-energy $e^{+}e^{-}$ collider. Furthermore, we report on measurements involving three-body decays $B^{+} \to K^{+} K^{-} \pi^{+}$ and $B^{+} \to \pi^{+} \pi^{0} \pi^{0}$ based on the Belle data collected at the $\Upsilon(4S)$ resonance.
| First author | S. Nishida |
|---|---|
| shohei.nishida@kek.jp | |
| Collaboration / Activity | Belle |
