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    Improved upper limits on the flavor-changing neutral current decays B -> Kl(+)l(-) and B -> K*(892)l(+)l(-)

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    e181803.pdf (118.3Kb)
    Issue Date
    2001-10
    Author
    Ammar, Raymond G.
    Bean, Alice
    Besson, David Zeke
    Zhao, X.
    Publisher
    AMERICAN PHYSICAL SOC
    Type
    Article
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    Abstract
    We have searched a sample of 9.6 x 10(6) B(B) over bar events for the flavor-changing neutral current decays B --> Kl(+)l(-) and B --> K*(892)l(+)l(-). We subject the latter decay to the requirement that the dilepton mass m(ll) exceed 0.5 GeV. There is no indication of a signal. We obtain the 90% confidence level upper limits B (B --> Kl(+)l(-)) < 1.7 x 10(-6) and B(B <right arrow> K*(892)l(+)l(-))m(ll>0.5GeV) < 3.3 x 10(-6). We also obtain an upper limit on the weighted average 0.65B(B <right arrow> Kl(+)l(-)) + 0.35B(B --> K*(892)l(+)l(-))m(ll>0.5GeV) < 1.5 x 10(-6). The weighted-average limit is only 50% above the standard model prediction.
    URI
    http://hdl.handle.net/1808/1322
    Collections
    • Center for Russian, East European, and Eurasian Studies Scholarly Publications [546]
    • Physics & Astronomy Scholarly Works [1715]
    Citation
    Anderson, S, Frolov, VV, et al . Improved upper limits on the flavor-changing neutral current decays B -> Kl(+)l(-) and B -> K*(892)l(+)l(-). PHYSICAL REVIEW LETTERS. October 2001. 9e+03(18)

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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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