Abstract
We report on a search for the decay and its charge conjugate with the CLEO detector at the Cornell Electron Storage Ring (CESR). No candidates are found in of data. The background is estimated to be leading to an upper limit (90% confidence level).
- Received 14 February 2001
DOI:https://doi.org/10.1103/PhysRevD.64.077501
©2001 American Physical Society