We present a search for semileptonic B decays to the charmed baryon Λc+ based on 420 fb-1 of data collected at the Υ(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 B(B̅ →Λc+Xℓ-ν̅ ℓ)/B(B̅ →Λc+X)<3.5%.
Search for B[over ¯]→Λ_{c}^{+}Xℓ^{-}ν[over ¯]_{ℓ} decays in events with a fully reconstructed B meson
LANCERI, LIVIO;VITALE, LORENZO;
2012-01-01
Abstract
We present a search for semileptonic B decays to the charmed baryon Λc+ based on 420 fb-1 of data collected at the Υ(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 B(B̅ →Λc+Xℓ-ν̅ ℓ)/B(B̅ →Λc+X)<3.5%.File in questo prodotto:
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