Measurement of Br(Bbar -> D+l-nubar) and Determination of |Vcb|

Abstract

We present a measurement of the branching fraction for the semileptonic B decay Bbar -> D+l-nubar, where l- can be either an electron or a muon. We find Gamma(Bbar -> D+l-nubar)= (13.79+/-0.76+/-2.51) ns^{-1}, and the resulting branching fraction Br(Bbar -> D+l-nubar)= (2.13 +/- 0.12 +/- 0.39)%, where the first error is statistical and the second systematic. We also investigate the Bbar -> D+l-nubar form factor and the implications of the result for |Vcb|. From a fit to the differential decay distribution we obtain the rate normalization |Vcb|F_D(1)= (4.11+/-0.44+/-0.52)x10^{-2}. Using a theoretical calculation of F_D(1), the Cabibbo-Kobayashi-Maskawa matrix element |Vcb|=(4.19+/-0.45+/-0.53+/-0.30)x10^{-2} is obtained, where the last error comes from the theoretical uncertainty of F_D(1). The results are based on a data sample of 10.2 fb^{-1} recorded at the Upsilon(4S)$ resonance with the Belle detector at the KEKB e+e- collider.

arXiv comment21pages, 5 figures, elsart.cls, to be published in PLB. In this version, the form factor comparison between B->Dlnu and D*lnu is included

References in corpus (12)

• Heavy Quark Symmetry
• Semileptonic Meson Decays in the Quark Model: An Update
• Dispersive Bounds on the Shape of B -> D^(*) l nu Form Factors
• Precision Corrections to Dispersive Bounds on Form Factors
• Lattice QCD calculation of $\bar{B}\to Dl\bar{\nu }$ decay form factors at zero recoil
• Soft Pion Emission in Semileptonic $B$-Meson Decays
• The Subleading Isgur-Wise Form Factor ${\xi }_3(v\cdot v^{\prime })$ and its Implications for the Decays $\bar{B}\to D^{(\ast )}\ell \bar{\nu }$
• Measurement of the $B\to D\ell \nu$ Branching Fractions and Form Factor
• Measurement of |Vcb| using B0 to D*l nu decays
• Measurement of V_{cb} from the decay process \bar{B^0} -> D^{*+} \ell^- \barν
• Determination of |Vcb| using the semileptonic decay \bar{B}^0 --> D^{*+}e^-\barν
• Measurement of the $\bar{B}\to D\ell \bar{\nu }$ Partila Width and Form Factor Parameters

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