Abstract
We search for the decays , , and in a sample of about decays collected with the BABAR detector at the PEP-II asymmetric-energy collider at Stanford Linear Accelerator Center. We find evidence for with significance and measure the branching fraction and longitudinal polarization fraction , where the first uncertainty is statistical, and the second is systematic. The uncertainty on the Cabibbo-Kobayashi-Maskawa quark-mixing matrix unitarity angle due to penguin contributions in decays is 18° at the level. We also set upper limits on the and decay rates.
- Received 11 December 2006
DOI:https://doi.org/10.1103/PhysRevLett.98.111801
©2007 American Physical Society