Measurement of |Vcb| and the Form-Factor Slope in B[over-bar] -->Dℓ-nu[over-bar] ℓ Decays in Events Tagged by a Fully Reconstructed B Meson
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Aubert-2010-Measurement of Vcb and the Form-Factor Slope.pdf
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Author(s)
Dujmic, Denis
Henderson, Shawn Wesley
Sciolla, Gabriella
Yamamoto, R. K.
Zhao, M.
Cowan, Ray F
Spitznagel, Michael A
Fisher, Peter H
Alternative Title
Measurement of |Vcb| and the Form-Factor Slope in B̅ →Dℓ-ν̅ ℓ Decays in Events Tagged by a Fully Reconstructed B Meson
Date Issued
January 2010
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
BABAR Collaboration et al. “Measurement of |V_{cb}| and the Form-Factor Slope in B[over -bar]-->Dl^{-} nu [over -bar]_{l} Decays in Events Tagged by a Fully Reconstructed B Meson.” Physical Review Letters 104.1 (2010): 011802. ©2010 American Physical Society.
Version
Final published version
Abstract
We present a measurement of the Cabibbo-Kobayashi-Maskawa matrix element |Vcb| and the form-factor slope ρ2 in B̅ -->Dℓ-ν̅ ℓ decays based on 460×106 BB̅ events recorded at the Υ(4S) resonance with the BABAR detector. B̅ -->Dℓ-ν̅ ℓ decays are selected in events in which a hadronic decay of the second B meson is fully reconstructed. We measure B(B--->D0ℓ-ν̅ ℓ)/B(B--->Xℓ-ν̅ ℓ)=(0.255±0.009±0.009) and B(B̅ 0-->D+ℓ-ν̅ ℓ)/B(B̅ 0-->Xℓ-ν̅ ℓ)=(0.230±0.011±0.011), along with the differential decay distribution in B̅ -->Dℓ-ν̅ ℓ decays. We then determine G(1)|Vcb|=(42.3±1.9±1.4)×10-3 and ρ2=1.20±0.09±0.04, where G(1) is the hadronic form factor at the point of zero recoil.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.104.011802
