Search for CP violation in the decays $D_{(s)}^{+}\to K_S^0{\pi }^{+}$ and $D_{(s)}^{+}\to K_S^0{K}^{+}$

Abstract

We have searched for CP violation in the charmed meson decays $D_{(s)}^{+}\to K_S^0{\pi }^{+}$ and $D_{(s)}^{+}\to K_S^0{K}^{+}$ using 673 fb${}^{-1}$ of data collected with the Belle detector at the KEKB asymmetric-energy $e^{+}{e}^{-}$ collider. No evidence for CP violation is observed. We report the most sensitive CP asymmetry measurements to date for these decays: $A_{CP}^{D^{+}\to K_S^0{\pi }^{+}}=(-0.71\pm 0.19\pm 0.20)$, $A_{CP}^{D_s^{+}\to K_S^0{\pi }^{+}}=(+5.45\pm 2.50\pm 0.33)$, $A_{CP}^{D^{+}\to K_S^0{K}^{+}}=(-0.16\pm 0.58\pm 0.25)$, and $A_{CP}^{D_s^{+}\to K_S^0{K}^{+}}=(+0.12\pm 0.36\pm 0.22)$, where the first uncertainties are statistical and the second are systematic.

References in corpus (3)

• New Physics and CP Violation in Singly Cabibbo Suppressed D Decays
• Measurements of D Meson Decays to Two Pseudoscalar Mesons
• Measurement of $D^{+}\to K_S^0{K}^{+}$ and $D_s^{+}\to K_S^0{\pi }^{+}$ branching ratios

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