Search for Bbar --> Lambda_c+ X l- nu Decays in Events With a Fully Reconstructed B Meson

Details Search for Bbar --> Lambda_c+ X l- nu Decays in Events With a Fully Reconstructed B Meson Search for Bbar --> Lambda_c+ X l- nu Decays in Events With a Fully Reconstructed B Meson

2011-10-27

arxiv.org/abs/1110.6005v1

Phys.Rev.D85:011102,2012

Physics

High Energy Physics

High Energy Physics - Experiment

7 pages, 5 postscript figures, submitted to PRD-RC

Scientific paper

10.1103/PhysRevD.85.011102

We present a search for semileptonic B decays to the charmed baryon Lambda_c+ based on 420 fb-1 of data collected at the Upsilon(4S) resonance with the BABAR detector at the PEP-II $e^+e^-$ storage rings. By fully reconstructing the recoiling B in a hadronic decay mode, we reduce non-B backgrounds and determine the flavor of the signal B. We statistically correct the flavor for the effect of the B0 mixing. We obtain a 90% confidence level upper limit of BF(Bbar --> Lambda_c+ X l- nubar)/BF(Bbar --> Lambda_c+ X) < 3.5 %.

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