Evidence for CP Violation in the Decay $D^+\rightarrow K^0_Sπ^+$

Details Evidence for CP Violation in the Decay $D^+\rightarrow K^0_Sπ^+$ Evidence for CP Violation in the Decay $D^+\rightarrow K^0_Sπ^+$

2012-03-29

arxiv.org/abs/1203.6409v1

Physics

High Energy Physics

High Energy Physics - Experiment

Scientific paper

We observe evidence for CP violation in the decay $D^+\rightarrow K^0_S\pi^+$ 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 $(-0.363\pm0.094\pm0.067)%$, 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.

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