Aubert, B. et al. (2009) Measurements of the semileptonic decays B¯→Dℓν¯ and B¯→D*ℓν¯ using a global fit to DXℓν¯ final states. Physical Review D, 79 (1). 012002. ISSN 1550-7998Metadata only available from this repository.
Semileptonic B̅ decays to DXℓν̅ (ℓ=e or μ) are selected by reconstructing D0ℓ and D+ℓ combinations from a sample of 230×106 Υ(4S)→BB̅ decays recorded with the BABAR detector at the PEP-II e+e- collider at SLAC. A global fit to these samples in a three-dimensional space of kinematic variables is used to determine the branching fractions B(B-→D0ℓν̅ )=(2.34±0.03±0.13)% and B(B-→D*0ℓν̅ )=(5.40±0.02±0.21)% where the errors are statistical and systematic, respectively. The fit also determines form-factor parameters in a parametrization based on heavy quark effective theory, resulting in ρD2=1.20±0.04±0.07 for B̅ →Dℓν̅ and ρD*2=1.22±0.02±0.07 for B̅ →D*ℓν̅ . These values are used to obtain the product of the Cabibbo-Kobayashi-Maskawa matrix element |Vcb| times the form factor at the zero recoil point for both B̅ →Dℓν̅ decays, G(1)|Vcb|=(43.1±0.8±2.3)×10-3, and for B̅ →D*ℓν̅ decays, F(1)|Vcb|=(35.9±0.2±1.2)×10-3.
|Subjects:||Q Science > QC Physics|
|Schools:||School of Applied Sciences|
|Depositing User:||Sharon Beastall|
|Date Deposited:||15 Dec 2011 12:47|
|Last Modified:||15 Dec 2011 12:47|
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