Abstract
A search for the rare decays and is performed in collisions at , with a data sample corresponding to an integrated luminosity of , collected by the CMS experiment at the LHC. In both cases, the number of events observed after all selection requirements is consistent with expectations from background and standard-model signal predictions. The resulting upper limits on the branching fractions are and , at 95% confidence level.
- Received 29 July 2011
DOI:https://doi.org/10.1103/PhysRevLett.107.191802
This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
© 2011 CERN, for the CMS Collaboration