Abstract
A search has been performed for and decays using of integrated luminosity collected by the CDF II detector at the Fermilab Tevatron collider. The observed number of candidates is consistent with background-only expectations and yields an upper limit on the branching fraction of at 95% confidence level. We observe an excess of candidates. The probability that the background processes alone could produce such an excess or larger is 0.27%. The probability that the combination of background and the expected standard model rate of could produce such an excess or larger is 1.9%. These data are used to determine and provide an upper limit of at 95% confidence level.
- Received 10 July 2011
- Corrected 17 November 2011
DOI:https://doi.org/10.1103/PhysRevLett.107.191801
© 2011 American Physical Society
Corrections
17 November 2011