Search forCPViolation inD0→π0π0Decays
Physical Review Letters(2014)
Abstract
We search for CP violation in neutral charm meson decays using a data sample with an integrated luminosity of 966 fb−1 collected with the Belle detector at the KEKB e+e− asymmetric-energy collider. The asymmetry obtained in the rate of D0 and ¯D0 decays to the π0π0 final state, [−0.03±0.64(stat)±0.10(syst)]%, is consistent with no CP violation. This constitutes an order of magnitude improvement over the existing result. We also present an updated measurement of the CP asymmetry in the D0→K0Sπ0 decay: ACP(D0→K0Sπ0)=[−0.21±0.16(stat)±0.07(syst)]%.Received 7 April 2014DOI:https://doi.org/10.1103/PhysRevLett.112.211601© 2014 American Physical Society
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