Abstract
The first observation of the decay is reported. The analysis is based on a data sample, corresponding to an integrated luminosity of of collisions, collected with the LHCb detector. The branching fraction relative to that of the topologically similar decay is measured to be . In addition, the relative branching fraction of the decay is measured to be .
- Received 24 April 2013
DOI:https://doi.org/10.1103/PhysRevD.87.112009
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© 2013 CERN, for the LHCb Collaboration