Orateur
Dr
Min-Zu Wang
(NTU, Taipei)
Description
We report measurements of branching fractions and
violation asymmetries for decays. Results of the study
of and ,
that result in a final state of five kaons, will also be presented.
We study the meson decays to the final state of . The decay is observed for the first time, with the invariant
mass of the system peaking near threshold.
Furthermore, we set an upper limit on decay branching fraction of
in absence of a statistically
significant signal.
We report a study of the exclusive meson decays to the final
states and . We
use , and
decay modes for the reconstruction.
The HyperCP experiment at Fermilab reported the observation of three
events for decay.
The dimuon masses of the observed events are clustered within detector
resolution of 1 MeV/ , around 214.3 MeV/ .
These decays might be interpreted as a two-body decay,
, .
Several theoretical papers interpret the as a sgoldstino
in SUSY model, a light Higgs boson in NMSSM model, or an U-boson.
We report on a search for the particle in to
decays.
We extend the search to a mass region from 212 MeV/ to 500 MeV/
with several different lifetime assumptions.
We measured the branching fraction of the decay
based. The branching fraction results were used to constrain the
- mixing angle.
These analyses are performed using the large data sample
collected with the Belle detector near the
resonance at the KEKB asymmetric collider.
Auteur principal
Dr
Min-Zu Wang
(NTU, Taipei)