Abstract
We report on a search for and decays using proton-antiproton collision data at corresponding to 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 0.94%. The probability that the combination of background and the expected standard model rate of could produce such an excess or larger is 6.8%. These data are used to determine a branching fraction and provide an upper limit of at 95% confidence level.
21 More- Received 28 January 2013
DOI:https://doi.org/10.1103/PhysRevD.87.072003
© 2013 American Physical Society