Abstract
We report on a search for the rare decay , which in the standard model is dominated by -exchange. The analysis is based on a data sample comprising pairs collected with the BABAR detector at the PEP-II asymmetric-energy Factory at SLAC. No significant signal is observed, and an upper limit on the branching fraction of at the 90% confidence level is obtained.
- Received 27 June 2005
DOI:https://doi.org/10.1103/PhysRevD.72.051106
©2005 American Physical Society