Observation of the baryonic B-decay B0bar -> Lambda_c^+ antiproton K^- pi^+

Details Observation of the baryonic B-decay B0bar -> Lambda_c^+ antiproton K^- pi^+ Observation of the baryonic B-decay B0bar -> Lambda_c^+ antiproton K^- pi^+

2009-07-27

arxiv.org/abs/0907.4566v3

Phys.Rev.D80:051105,2009

Physics

High Energy Physics

High Energy Physics - Experiment

7 pages, 3 postscript figures, submitted to PRD RC; BABAR-PUB-09/014, SLAC-PUB-13675

Scientific paper

10.1103/PhysRevD.80.051105

We report the observation of the baryonic B-decay B0bar -> Lambda_c^+ antiproton K^- pi^+, excluding contributions from the decay B0bar -> Lambda_c^+ anti-Lambda K^-. Using a data sample of 467*10^6 BBbar pairs collected with the BABAR detector at the PEP-II storage ring at SLAC, the measured branching fraction is (4.33 +/- 0.82_stat +/- 0.33_syst +/- 1.13_Lambda_c^+)*10^-5. In addition we find evidence for the resonant decay B0bar -> Sigma_c(2455)^++ antiproton K^- and determine its branching fraction to be (1.11 +/- 0.30_stat +/- 0.09_syst +/- 0.29_Lambda_c^+)*10^-5. The errors are statistical, systematic, and due to the uncertainty in the Lambda_c^+ branching fraction. For the resonant decay B0bar -> Lambda_c^+ antiproton K^*0 we obtain an upper limit of 2.42*10^-5 at 90% confidence level.

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