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    Measurement of the B semileptonic branching fraction with lepton tags

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    Issue Date
    1996-03
    Author
    Ammar, Raymond G.
    Baringer, Philip S.
    Bean, Alice
    Besson, David Zeke
    Coppage, Don
    Copty, N.
    Davis, Robin E. P.
    Hancock, N.
    Kotov, S.
    Kravchenko, I.
    Kwak, Nowhan
    Publisher
    AMERICAN PHYSICAL SOC
    Type
    Article
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    Abstract
    We have used the CLEO II detector and 2.06 fb(-1) of Y(4S) data to measure the B-meson semileptonic branching fraction. The B --> Xe nu momentum spectrum was obtained over nearly the full momentum range by using charge and kinematic correlations in events with a high-momentum lepton tag and an additional electron. We find B(B --> Xe nu) = (10.49 +/- 0.17 +/- 0.43)%, with overall systematic uncertainties less than those of untagged single-lepton measurements. We use this result to calculate the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element V-cb and to set an upper limit on the fraction of Y(4S) decays to final states other than B (B) over bar.
    URI
    http://hdl.handle.net/1808/1407
    Collections
    • Center for Russian, East European, and Eurasian Studies Scholarly Publications [546]
    • Physics & Astronomy Scholarly Works [1744]
    Citation
    Barish, B, Chadha, M, et al. Measurement of the B semileptonic branching fraction with lepton tags. PHYSICAL REVIEW LETTERS. March 1996. 76(10) : 1570-1574

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    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

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