Observation Of The Decay B0bar Lambdac Antiproton Pi0 PDF Download

The authors report the observation of the baryonic B-decay {bar B}° → ?{sub c}+{bar p}K−?+, excluding contributions from the decay {bar B}° → ?{sub c}+{bar ?}K−. Using a data sample of 467 million B{bar B} pairs collected with the BABAR detector at the PEP-II storage ring at SLAC, the measured branching fraction is (4.33 ± 0.82){sub stat} ± 0.33{sub syst} ± 1.13{sub ?{sub c}+} x 10−5. In addition they find evidence for the resonant decay {bar B}° → ?{sub c}(2455){sup ++}{bar p}K− and determine its branching fraction to be (1.11 ± 0.30{sub stat} ± 0.09{sub syst} ± 0.29{sub ?{sub c}+}) x 10−5. The errors are statistical, systematic, and due to the uncertainty in the ?{sub c}+ branching fraction. For the resonant decay {bar B}° → ?{sub c}+{bar p}{bar K}*° we obtain an upper limit of 2.42 x 10−5 at 90% confidence level.