Evidence for CP Violation in the Decay $D^{+}\to K_S^0{\pi }^{+}$

Abstract

We observe evidence for CP violation in the decay $D^{+}\to K_S^0{\pi }^{+}$ using a data sample with an integrated luminosity of 977 fb${}^{-1}$ collected by the Belle detector at the KEKB $e^{+}{e}^{-}$ asymmetric-energy collider. The CP asymmetry in the decay is measured to be $(-0.363\pm 0.094\pm 0.067)$, which is 3.2 standard deviations away from zero, and is consistent with the expected CP violation due to the neutral kaon in the final state.

6 pages, 3 figures

References in corpus (4)

• New Physics and CP Violation in Singly Cabibbo Suppressed D Decays
• Evidence for CP violation in time-integrated D0 -> h-h+ decay rates
• CP Violation in τ->νπK_S and D->πK_S: The Importance of K_S-K_L Interference
• Search for CP Violation in the Decay D+/- -> Ks pi+/-

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