Abstract
The decay is observed for the first time, using of collisions at collected by the LHCb experiment. The ratio of branching fractions is measured to be , where the first uncertainty is statistical and the second is systematic. The result is in agreement with theoretical predictions.
- Received 31 March 2012
DOI:https://doi.org/10.1103/PhysRevLett.108.251802
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© 2012 CERN, for the LHCb Collaboration