We present a search for semileptonic B decays to the charmed baryon Λ+c 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(B¯¯¯→Λ+cXℓ−ν¯ℓ)/B(B¯¯¯→Λ+cX)<3.5%.
Search for B[over ¯]→Λ_{c}^{+}Xℓ^{-}ν[over ¯]_{ℓ} decays in events with a fully reconstructed B meson
A. Gaz;SIMI, GABRIELE;MARGONI, MARTINO;SIMONETTO, FRANCO;STROILI, ROBERTO;
2012
Abstract
We present a search for semileptonic B decays to the charmed baryon Λ+c 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(B¯¯¯→Λ+cXℓ−ν¯ℓ)/B(B¯¯¯→Λ+cX)<3.5%.File in questo prodotto:
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