Orateur
Dr
Min-Zu Wang
(NTU, Taipei)
Description
We report measurements of branching fractions and $CP$
violation asymmetries for $B\to \phi\phi K$ decays. Results of the study
of $B^{\pm}\to J/\psi K^{\pm}$ and $B^{\pm}\to\eta_C K^{\pm}$,
that result in a final state of five kaons, will also be presented.
We study the $B^-$ meson decays to the final state of $\overline{p}
\Lambda D^0$. The decay $B^-\to\overline{p}
\Lambda D^{*0}$ is observed for the first time, with the invariant
mass of the $\overline{p}\Lambda$ system peaking near threshold.
Furthermore, we set an upper limit on decay branching fraction of
$B^-\to\overline{p}\Lambda D^{*0}$ in absence of a statistically
significant signal.
We report a study of the exclusive $B$ meson decays to the final
states $D_s K^0_S\pi$ and $D_s KK$. We
use $D_s^- \to\phi\pi^-$, $\bar{K}^*(892)^0 K^-$ and $K^0_S K^-$
decay modes for the $D_s$ reconstruction.
The HyperCP experiment at Fermilab reported the observation of three
events for $\Sigma \rightarrow p \mu^+\mu^-$ decay.
The dimuon masses of the observed events are clustered within detector
resolution of 1 MeV/$c^2$, around 214.3 MeV/$c^2$.
These decays might be interpreted as a two-body decay,
$\Sigma^+ \rightarrow p X^0(214)$, $X^0(214) \rightarrow \mu^+\mu^-$.
Several theoretical papers interpret the $X^0(214)$ as a sgoldstino
in SUSY model, a light Higgs boson in NMSSM model, or an U-boson.
We report on a search for the $X^0$ particle in $B^0$ to $K^+(\pi^+)\pi^
-X^0$
decays.
We extend the search to a mass region from 212 MeV/$c^2$ to 500 MeV/$c^2
$
with several different $X^0$ lifetime assumptions.
We measured the branching fraction of the decay $B^0 \to J/\psi \eta^{
(')}$
based. The branching fraction results were used to constrain the
$\eta$-$\eta'$ mixing angle.
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.
Auteur principal
Dr
Min-Zu Wang
(NTU, Taipei)
