Abstract
A search for the decay is presented using a data sample corresponding to an integrated luminosity of of collisions collected by LHCb. This decay is expected to be mediated by a -exchange diagram, with little contribution from rescattering processes, and therefore a measurement of the branching fraction will help us to understand the mechanism behind related decays such as and . Systematic uncertainties are minimized by using as a normalization channel. We find no evidence for a signal, and set an upper limit on the branching fraction of at 90% (95%) confidence level.
- Received 27 February 2013
DOI:https://doi.org/10.1103/PhysRevD.87.071101
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© 2013 CERN, for the LHCb Collaboration