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rdf:type |
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lifeskim:mentions |
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pubmed:issue |
22
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pubmed:dateCreated |
2003-12-19
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pubmed:abstractText |
We present evidence for the flavor-changing neutral current decay B-->K*l+l- and a measurement of the branching fraction for the related process B-->K l+l-, where l+l- is either an epsilon+epsilon- or a mu+mu- pair. These decays are highly suppressed in the standard model, and they are sensitive to contributions from new particles in the intermediate state. The data sample comprises 123 x 10(6) Upsilon(4S)-->B(-)B decays collected with the BABAR detector at the SLAC PEP-II epsilon+epsilon- storage ring. Averaging over K(*) isospin and lepton flavor, we obtain the branching fractions B(B-->Kl+l-)=(0.65(+0.14)(-0.13)+/-0.04)x10(-6) and B(B-->K*l+l-)=(0.88(+0.33)(-0.29)+/-0.10)x10(-6), where the uncertainties are statistical and systematic, respectively. The significance of the B-->Kl+l- signal is over 8sigma, while for B-->K*l+l- it is 3.3sigma.
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pubmed:language |
eng
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pubmed:journal |
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pubmed:status |
PubMed-not-MEDLINE
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pubmed:month |
Nov
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pubmed:issn |
0031-9007
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pubmed:author |
pubmed-author:SchubertJJ,
pubmed-author:AbeTT,
pubmed-author:AbeKK,
pubmed-author:WagnerGG,
pubmed-author:JohnsonJ RJR,
pubmed-author:BrownDD,
pubmed-author:WilsonM GMG,
pubmed-author:ChenSS,
pubmed-author:PetersKK,
pubmed-author:PeraFF,
pubmed-author:RoyJJ,
pubmed-author:WandSS,
pubmed-author:GeorgeSS,
pubmed-author:BrandtTT,
pubmed-author:De GrootNN,
pubmed-author:KochHH,
pubmed-author:SofferAA,
pubmed-author:BrownC MCM,
pubmed-author:WalshJJ,
pubmed-author:ZiaS HSH,
pubmed-author:EckmannRR,
pubmed-author:WagnerS RSR,
pubmed-author:LuCC,
pubmed-author:FreyRR,
pubmed-author:WilliamsJ CJC,
pubmed-author:KitayamaII,
pubmed-author:BlancFF,
pubmed-author:ChanLL,
pubmed-author:LavinDD,
pubmed-author:LynchGG,
pubmed-author:FryJ RJR,
pubmed-author:StarkJJ,
pubmed-author:TaylorFF,
pubmed-author:KhanAA,
pubmed-author:SeidelCC,
pubmed-author:MoriiMM,
pubmed-author:SchmittR GRG,
pubmed-author:KaganHH,
pubmed-author:CapraRR,
pubmed-author:PayneD JDJ,
pubmed-author:HaireMM,
pubmed-author:AngeliniCC,
pubmed-author:ChauveauJJ,
pubmed-author:BrownC LCL,
pubmed-author:LegendreMM,
pubmed-author:AlbertJJ,
pubmed-author:WrightD HDH,
pubmed-author:PaolucciPP,
pubmed-author:BrunetSS,
pubmed-author:OlsenJJ,
pubmed-author:WilsonR JRJ,
pubmed-author:KoflerRR,
pubmed-author:BernardDD,
pubmed-author:BianchiFF,
pubmed-author:MacriMM,
pubmed-author:EmerySS,
pubmed-author:ForthEE,
pubmed-author:OlivanJJ,
pubmed-author:WuJJ,
pubmed-author:BangH OHO,
pubmed-author:DavisC LCL,
pubmed-author:AhmedSS,
pubmed-author:SaleebFF,
pubmed-author:BonaMM,
pubmed-author:ReidyJJ,
pubmed-author:NealHH,
pubmed-author:WilliamsD CDC,
pubmed-author:KimHH,
pubmed-author:LidMM,
pubmed-author:PerdueM LML,
pubmed-author:DavidPP,
pubmed-author:BabaM LML,
pubmed-author:RitchieJ LJL,
pubmed-author:JacksonFF,
pubmed-author:EdwardsA JAJ,
pubmed-author:LangerMM,
pubmed-author:BelliniFF,
pubmed-author:ITOI YIY,
pubmed-author:YangSS,
pubmed-author:VerkerkeWW,
pubmed-author:SharmaVV,
pubmed-author:RizzoGG,
pubmed-author:SchottGG,
pubmed-author:HillE JEJ
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