We have searched for decays, where stands for a charged or neutral kaon, or a charged pion. These results are based on a data sample collected with the Belle detector on the resonance at the KEKB asymmetric-energy collider, containing events. We observe the decay and measure its branching fraction, . The first error is statistical, the second is systematic, and the third error is due to the uncertainty in the production fraction in events. No significant signals are seen in other decay modes, and we set upper limits at the 90% confidence level: , , and .
- Received 26 June 2010
© 2010 The American Physical Society