Orateur
Dr
takeo Higuchi
(KEK, Tsukuba)
Description
Using the large data sample collected at the $\Upsilon(4S)$
resonance with the Belle detector
at the KEKB asymmetric-energy $e^+e^-$ collider,
we present an improved measurement of time-dependent CP violation
in the neutral $B$ decays into charmonium and $K^0$.
CPT is expected to be a fundamental symmetry with no significant
deviations.
Nonetheless we can introduce an artificial perturbation parameter to
the $B^0-\bar{B}^0$ mixing system that violates CPT symmetry. The CPT
violating parameter, which is a complex number but expected to be zero,
can be probed through proper time difference distributions in correlated
B meson pair decays. We present a measurement of the CPT violating
parameter.
We report measurements of branching fractions and CP violation
parameters
in the neutral B meson decays into $D^+D^-$ and $D^{*+}D^{*-}$.
We report the first observation of the radiative decay
$B^0 \to \phi K^0 \gamma$
and measurements of time-dependent $CP$-violation.
These measurements are sensitive to new physics from right-handed
currents.
We also report an updated measurement
of the branching fraction in $B^+ \to \phi K^+ \gamma$
as well as measurements of a new radiative penguin decay
$B \to \omega K^{+}(K^0) \gamma$.
Auteur principal
Dr
takeo Higuchi
(KEK, Tsukuba)
