Determination of |Vcb| using the semileptonic decay \bar{B}^0 --> D^{*+}e^-\barν

Abstract

We present a measurement of the Cabibbo-Kobayashi-Maskawa (CKM) matrix element |Vcb| using a 10.2 fb^{-1} data sample recorded at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric e^+e^- storage ring. By extrapolating the differential decay width of the \bar{B}^0 --> D^{*+}e^-\barν decay to the kinematic limit at which the D^{*+} is at rest with respect to the \bar{B}^0, we extract the product of |Vcb| with the normalization of the decay form factor F(1), |Vcb |F(1)= (3.54+/-0.19+/-0.18)x10^{-2}, where the first error is statistical and the second is systematic. A value of |Vcb| = (3.88+/-0.21+/-0.20+/-0.19)x10^{-2} is obtained using a theoretical calculation of F(1), where the third error is due to the theoretical uncertainty in the value of F(1). The branching fraction B(\bar{B}^0 --> D^{*+}e^-\barν) is measured to be (4.59+/-0.23+/-0.40)x10^{-2}.

arXiv comment20 pages, 6 figures, elsart.cls, submitted to PLB

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Cited by in corpus (20)

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• Determination of the Form Factors for the Decay B0 -> D*- l+ nu_l and of the CKM Matrix Element |V_cb|
• Identifying $D_{sJ}(2700)$ through its decay modes
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• Measurement of the Lambda_b^0 Decay Form Factor
• The decays $\bar{B}\to D^{\ast \ast }\pi$ and the Isgur-Wise functions ${\tau }_{1/2}(w)$, ${\tau }_{3/2}(w)$
• Quenched lattice calculation of the vector channel B --> D* l nu decay rate
• B Meson Decays
• Measurement of the B0bar --> D*+ l- nubar_l Decay Rate and |Vcb|
• Perturbative corrections to curvature sum rules
• Measurement of the branching fractions for B- --> D(*)+ pi- l- nu-bar and B0bar --> D(*)0 pi+ l- nu-bar
• Selected Theoretical Issues in B-meson Physics: CKM matrix and Semileptonic Decays