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rdf:type |
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lifeskim:mentions |
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pubmed:issue |
10
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pubmed:dateCreated |
2005-10-3
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pubmed:abstractText |
We present a new measurement of the time-dependent CP-violating parameters in B(0)--> pi(+)pi(-) decays with 275 x 10(6) BB pairs collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider operating at the Gamma(4S) resonance. We find 666 +/- 43 B(0) --> pi(+)pi(-) events and measure the CP-violating parameters: S(pipi) = -0.67 +/- 0.16(stat) +/- 0.06(syst) and A(pipi) = +0.56 +/- 0.12(stat) +/- 0.06(syst). We find evidence for large direct CP violation with a significance greater than 4 standard deviations for any S(pipi) value. Using isospin relations, we obtain 95.4% confidence intervals for the Cabibbo-Kobayashi-Maskawa quark-mixing matrix angle phi(2) of 0 degree < phiv(2) < 19 degrees and 71 degrees < phi(2) < 180 degrees.
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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 |
Sep
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pubmed:issn |
0031-9007
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pubmed:author |
pubmed-author:OgawaSS,
pubmed-author:SuzukiSS,
pubmed-author:AbeKK,
pubmed-author:TanakaMM,
pubmed-author:BRUCEM AMA,
pubmed-author:WangC CCC,
pubmed-author:WatanabeYY,
pubmed-author:HaraKK,
pubmed-author:HaraTT,
pubmed-author:KumarSS,
pubmed-author:YamauchiMM,
pubmed-author:AdachiII,
pubmed-author:OkabeTT,
pubmed-author:IwasakiYY,
pubmed-author:NishidaSS,
pubmed-author:MizuiTT,
pubmed-author:ItoiSS,
pubmed-author:BanYY,
pubmed-author:YamaguchiAA,
pubmed-author:OzakiHH,
pubmed-author:TsukamotoTT,
pubmed-author:UenoKK,
pubmed-author:NakaoMM,
pubmed-author:SatoNN,
pubmed-author:KawasakiTT,
pubmed-author:NakazawaHH,
pubmed-author:NakanoEE,
pubmed-author:SakaiYY,
pubmed-author:KawaiHH,
pubmed-author:ChenW TWT,
pubmed-author:WangC HCH,
pubmed-author:NakamuraII,
pubmed-author:UeharaSS,
pubmed-author:KuoC CCC,
pubmed-author:ChangPP,
pubmed-author:MiyataHH,
pubmed-author:UnoSS,
pubmed-author:EidelmanSS,
pubmed-author:KinoshitaKK,
pubmed-author:VillaSS,
pubmed-author:TamuraNN,
pubmed-author:NoguchiSS,
pubmed-author:OkunoSS,
pubmed-author:MiyakeHH,
pubmed-author:ParkHH,
pubmed-author:YamashitaYY,
pubmed-author:IijimaTT,
pubmed-author:KaneJ FJF,
pubmed-author:SchwartzA JAJ,
pubmed-author:IshikawaAA,
pubmed-author:ShibuyaHH,
pubmed-author:MohapatraDD,
pubmed-author:MacNaughtonJJ,
pubmed-author:MurakamiAA,
pubmed-author:OOIS KSK,
pubmed-author:IwasakiMM,
pubmed-author:SchneiderOO,
pubmed-author:ColeSS,
pubmed-author:BanTT,
pubmed-author:HoshiYY,
pubmed-author:NagamineTT,
pubmed-author:EydeR HRH,
pubmed-author:KatayamaNN,
pubmed-author:NagasakaYY,
pubmed-author:IshinoHH,
pubmed-author:KimS MSM,
pubmed-author:MikamiYY,
pubmed-author:SagawaHH,
pubmed-author:OhshimaTT,
pubmed-author:SinghJ BJB,
pubmed-author:LeeS ESE,
pubmed-author:AiharaHH,
pubmed-author:ChoiYY,
pubmed-author:ChaoYY,
pubmed-author:MajumderGG,
pubmed-author:OnukiYY,
pubmed-author:ZhangZ PZP,
pubmed-author:NozakiTT,
pubmed-author:SoniNN,
pubmed-author:FangFF,
pubmed-author:SumiyoshiTT,
pubmed-author:HouSS,
pubmed-author:LawW TWT
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