Abstract
First observations and measurements of the branching fractions of the , and decays are presented using of data collected by the LHCb experiment. These branching fractions are normalized to those of , and , respectively. An excess of events consistent with the decay is also seen, and its branching fraction is measured relative to that of . Improved measurements of the branching fractions and are reported, each relative to . The ratios of branching fractions are , , , at 90% CL, , , where the uncertainties are statistical and systematic, respectively.
- Received 23 February 2013
DOI:https://doi.org/10.1103/PhysRevD.87.092007
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© 2013 CERN, for the LHCb Collaboration