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

Abstract : 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 %.
Document type :
Journal articles

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Submitted on : Wednesday, February 22, 2012 - 10:58:30 AM
Last modification on : Saturday, October 9, 2021 - 4:00:26 AM

### Citation

J.P. Lees, V. Poireau, V. Tisserand, D. Bernard, M. Verderi, et al.. Search for Bbar --> Lambda_c+ X l- nu Decays in Events With a Fully Reconstructed B Meson. Physical Review D, American Physical Society, 2012, 85, pp.011102. ⟨10.1103/PhysRevD.85.011102⟩. ⟨in2p3-00672860⟩

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