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# Measurement of the inclusive semileptonic branching fraction of B mesons and |Vcb|

Phys.Lett.B547:181-192,2002 [Peer Reviewed Journal]

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• Title:
Measurement of the inclusive semileptonic branching fraction of B mesons and |Vcb|
• Author: The Belle Collaboration
• Found In: Phys.Lett.B547:181-192,2002 [Peer Reviewed Journal]
• Subjects: High Energy Physics - Experiment
• Description: We present a measurement of the electron spectrum from inclusive semileptonic {\it B} decay, using 5.1 fb$^{-1}$ of $\Upsilon(4S)$ data collected with the Belle detector. A high-momentum lepton tag was used to separate the semileptonic {\it B} decay electrons from secondary decay electrons. We obtained the branching fraction, ${\cal B}(B\to X e^+ \nu) = (10.90 \pm 0.12 \pm 0.49)%$, with minimal model dependence. From this measurement, we derive a value for the Cabibbo-Kobayashi-Maskawa matrix element $|V_{cb}| = 0.0408 \pm 0.0010 {\rm (exp)} \pm 0.0025{\rm (th)}$. Comment: 16 pages, 3 figures, 3 tables
• Identifier: Arxiv ID: hep-ex/0208033