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Search for the rare decays B-->Kl(+)l(-) and B-->K(*)l(+)l(-) |
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| Authors: | Aubert B Boutigny D Gaillard J-M Hicheur A Karyotakis Y Lees J P Robbe P Tisserand V Palano A Pompili A Chen G P Chen J C Qi N D Rong G Wang P Zhu Y S Eigen G Stugu B Abrams G S Borgland A W Breon A B Brown D N Button-Shafer J Cahn R N Clark A R Gill M S Gritsan A V Groysman Y Jacobsen R G Kadel R W Kadyk J Kerth L T Kolomensky Yu G Kral J F LeClerc C Levi M E Lynch G Oddone P J Pripstein M Roe N A Romosan A Ronan M T Shelkov V G Telnov A V Wenzel W A Harrison T J Hawkes C M Knowles D J O'Neale S W Penny R C Watson A T Watson N K Deppermann T Goetzen K Koch H Kunze M Lewandowski B Peters K |
| Institution: | Laboratoire de Physique des Particules, F-74941 Annecy-le-Vieux, France. |
| Abstract: | We present results from a search for the flavor-changing neutral current decays B-->Kl(+)l(-) and B-->K(*)l(+)l(-), where l(+)l(-) is either an e(+)e(-) or mu(+)mu(-) pair. The data sample comprises 22.7 x 10(6) Upsilon(4S)-->B(-)B decays collected with the BABAR detector at the PEP-II B Factory. We obtain the 90% C.L. upper limits B(B-->Kl(+)l(-))<0.51 x 10(-6) and B(B-->K(*)l(+)l(-))<3.1 x 10(-6), close to standard model predictions for these branching fractions. We have also obtained limits on the lepton-family-violating decays B-->Ke+/-mu(-/+) and B-->K(*)e(+/-)mu(-/+). |
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