Speaker
Description
We report the first search of CP violation using T-odd triple product asymmetries and the most precise branching fraction measurement for the singly Cabibbo suppressed decay $D^{0}\rightarrow K_{s}^{0} K_{s}^{0} \pi^{+} \pi^{-}$. These results will be obtained using $922\,{\rm fb}^{-1}$ data sample that was collected with the Belle detector at the KEKB asymmetric energy $e^+ e^-$ collider. The branching fraction is measured relative to the normalization channel $D^{0}\rightarrow K_{s}^{0} \pi^{+} \pi^{-}$. Charm decays are expected to have very small CP violation in the standard model, this makes CP violation searches in charm decays an excellent probe of physics beyond the standard model. We have probed the asymmetries in the observable C$_{T}$ = $\vec{P}_{K_{s}^{0}} \cdot (\vec{P}_{\pi^{+}} \times \vec{P}_{\pi^{-}})$ for $D^{0}$ and $\overline{D}^{0}$ decays. Looking at the difference of T-odd asymmetries between CP conjugate $D^{0}$ and $\overline{D}^{0}$ decays provides us a CP asymmetry observable free from strong interaction effects.
| Are you are a member of the APS Division of Particles and Fields? | Yes |
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