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

View/ Open
Issue Date
2001-10Author
Ammar, Raymond G.
Bean, Alice
Besson, David Zeke
Zhao, X.
Publisher
AMERICAN PHYSICAL SOC
Type
Article
Metadata
Show full item recordAbstract
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.
Collections
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)
Items in KU ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.
We want to hear from you! Please share your stories about how Open Access to this item benefits YOU.