Orateur
Dr
Marko Staric
(Jozef Stefan Institute)
Description
We report a measurement of $D^0$ - $\bar D^0$ mixing in
$D^{0} \to K_S^0 \pi^{+} \pi^{-}$ decays using a time-dependent Dalitz
plot analysis.
We will also present an updated measurement of the mixing parameter
$y_{CP}$ in decays $D^0 \to K^+K^-$ and $D^0 \to \pi^+\pi^-$.
We will present a measurement to search for $CP$ violation in charged
$D$ meson decays by measuring the $CP$ violating asymmetry difference
between Cabibbo-suppressed decays $D^+ \to K^+K^- \pi^+$ and Cabibbo-
favored
decays $D_s^+ \to K^+K^- \pi^+$ in a mass region of the $\phi$ resonance.
We have searched for CP violation in the decays $D^0\rightarrow K^0_S P^
0$
where $P^0$ denotes a neutral pseudo-scalar meson which is either a $\pi
^0$,
$\eta$, or $\eta'$. No evidence of significant CP violation is observed.
We report the most precise CP asymmetry measurement in the decay
$D^0\rightarrow K^0_S\pi^0$ to date: $A_{CP}^{D^0\rightarrow K^0_S\pi^0}
=(-0.28\pm0.19\pm0.10)%$. We also report the first measurements of CP
asymmetries
in the decays $D^0\rightarrow K^0_S\eta$ and $D^0\rightarrow K^0_S\eta'$:
$A_{CP}^{D^0\rightarrow K^0_S\eta}=(+0.54\pm0.51\pm0.16)%$ and
$A_{CP}^{D^0\rightarrow K^0_S\eta'}=(+0.98\pm0.67\pm0.14)%$,
respectively.
We report the first observations of the decay $D^+ \to K^+ \eta^{(')}$
and the search for the CP violation in the decay $D^+ \to \pi^+ \eta^{(')
}$.
The branching ratios with respect to their normalization modes and CP
measurements will be presented.
We report preliminary results on the time-integrated asymmetry of the
decays $D^0$ and $\bar{D^0}$ to $\pi^+ \pi^- \pi^0$.
Results of the Dalitz plot analysis of $A_{CP}$ for two
approaches -- model dependent and model independent -- are presented.
The results are obtained from a large data sample collected on the
$\Upsilon(4S)$ and $\Upsilon(5S)$ resonance with the Belle detector
at the KEKB asymmetric energy $e^+ e^-$ collider.
Auteur principal
Dr
Marko Staric
(Jozef Stefan Institute)
