Abstract
We present measurements of and branching fractions using of data at the CLEO- experiment. We find that is larger than , with an asymmetry of . For and , we observe no measurable difference; the asymmetry is . The asymmetry is consistent with the value based on the U-spin prediction , where is the Cabibbo angle.
- Received 8 November 2007
DOI:https://doi.org/10.1103/PhysRevLett.100.091801
©2008 American Physical Society