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Measurement of the Branching Fractions of B¯→D**ℓ-ν¯ℓ Decays in Events Tagged by a Fully Reconstructed B Meson

Aubert, B. et al. (2008) Measurement of the Branching Fractions of B¯→D**ℓ-ν¯ℓ Decays in Events Tagged by a Fully Reconstructed B Meson. Physical Review Letters, 101 (26). p. 261802. ISSN 0031-9007

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Abstract

We report a measurement of the branching fractions of B̅ →D**ℓ-ν̅ ℓ decays based on 417 fb-1 of data collected at the Υ(4S) resonance with the BABAR detector at the PEP-II e+e- storage rings. Events are selected by fully reconstructing one of the B mesons in a hadronic decay mode. A fit to the invariant mass differences m(D(*)π)-m(D(*)) is performed to extract the signal yields of the different D** states. We observe the B̅ →D**ℓ-ν̅ ℓ decay modes corresponding to the four D** states predicted by heavy quark symmetry with a significance greater than 5 standard deviations including systematic uncertainties.

Item Type: Article
Subjects: Q Science > QC Physics
Schools: School of Applied Sciences
Depositing User: Sharon Beastall
Date Deposited: 30 Mar 2011 13:22
Last Modified: 30 Mar 2011 13:22
URI: http://eprints.hud.ac.uk/id/eprint/9967

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