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 / J., L., V., P., V., T., J., G.T., E., G., M., M., D., M., A., P., M., P., G., E., B., S., L., S., D., B., L., K., Kolomensky, Y.u., G., L., T., T., H., K., T., S., D., A., et al.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - STAMPA. - 85:(2012), pp. 011102-011109. [10.1103/PhysRevD.85.011102]

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%.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/2565626
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