Abstract
We measure the branching fraction and violation asymmetry in the decay , using a data sample of pairs collected at the resonance with the Belle detector at the KEKB collider. The obtained branching fraction and direct asymmetry are and , respectively. The signal significance, including the systematic uncertainty, is 6.4 standard deviations. We combine these results with Belle’s earlier measurements of and to exclude the -violating parameter from the range at 95% confidence level.
- Received 7 May 2017
DOI:https://doi.org/10.1103/PhysRevD.96.032007
© 2017 American Physical Society