Charge-Parity violation in charm decays at Belle

Using the full data sample collected with the Belle detector at the KEKB asymmetric-energy $e^{+}{e}^{-}$ collider, we present CP violation in charm decays. The $D^0-{\bar{D}}^0$ mixing parameter $y_{CP}$ and indirect CP violation parameter $A_{\mathrm{\Gamma }}$ in $D^0\to h^{+}{h}^{-}$ decays are reported, where $h$ denotes $K$ and $\pi$. The preliminary results are $y_{CP}=(1.11\pm 0.22\pm 0.11)$ and $A_{\mathrm{\Gamma }}=(-0.03\pm 0.20\pm 0.08)$. We also report searches for CP violation in $D^0\to h^{+}{h}^{-}$ and $D^+\rightarrow K^0_S K^+$decays\mathrm{.}NoevidenceforCPviolationin$D^0\rightarrow h^+h^-$ is observed with $A_{CP}^{KK}=(-0.32\pm 0.21\pm 0.09)$ and $A_{CP}^{\pi \pi }=(+0.55\pm 0.36\pm 0.09)$. The CP asymmetry difference between $D^0\to K^{+}{K}^{-}$ and $D^0\to {\pi }^{+}{\pi }^{-}$ decays is measured with $\Delta A^{hh}_{CP}=(-0.87\pm0.41\pm0.06)%$\mathrm{.}TheCPasymmetryin$D^+\rightarrow K^0_S K^+$decayismeasuredtobe$(-0.25\pm0.28\pm0.14)%$\mathrm{.}AftersubtractingCPviolationdueto$K^0-\bar{K}^0$mixing,theCPasymmetryin$D^+\rightarrow\bar{K}^0 K^+$decayisfoundtobe$(+0.08\pm0.28\pm0.14)%$.