Search for CP Violation in the Decays $D^0\to K_S^0{P}^0$

We have searched for CP violation in the decays $D^0\to K_S^0{P}^0$ where $P^0$ denotes a neutral pseudo-scalar meson which is either a ${\pi }^0$, $\eta$, or ${\eta }^{\mathrm{\prime }}$ using KEKB asymmetric-energy $e^{+}{e}^{-}$ collision data corresponding to an integrated luminosity of 791 fb${}^{-1}$ collected with the Belle detector. No evidence of significant CP violation is observed. We report the most precise CP asymmetry measurement in the decay $D^0\rightarrow K^0_S\pi^0$todate:$A_{CP}^{D^0\rightarrow K^0_S\pi^0}=(-0.28\pm0.19\pm0.10)%$. We also report the first measurements of CP asymmetries in the decays $D^0\to K_S^0\eta$ 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.