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

Abstract

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 ${\eta }^{\prime }$ 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 $D^0\to K_S^0{\pi }^0$ to date: $A_{CP}^{D^0\to K_S^0{\pi }^0}=(-0.28\pm 0.19\pm 0.10)$. We also report the first measurements of CP asymmetries in the decays $D^0\to K_S^0\eta$ and $D^0\to K_S^0{\eta }^{\prime }$: $A_{CP}^{D^0\to K_S^0\eta }=(+0.54\pm 0.51\pm 0.16)$ and $A_{CP}^{D^0\to K_S^0{\eta }^{\prime }}=(+0.98\pm 0.67\pm 0.14)$, respectively.

References in corpus (3)

• New Physics and CP Violation in Singly Cabibbo Suppressed D Decays
• Search for CP violation in the decays $D_{(s)}^{+}\to K_S^0{\pi }^{+}$ and $D_{(s)}^{+}\to K_S^0{K}^{+}$
• Measurement of $D^{+}\to K_S^0{K}^{+}$ and $D_s^{+}\to K_S^0{\pi }^{+}$ branching ratios

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