Recent Results from Y(2S)and Xcj Decays平荣刚IHEP,Beijingfor the BES Collaboration中国物理学会2006年秋季会议CPS2006,Sept.15-17, 2006, BeijingPing Rong-Gang
Recent Results from Ψ(2S) and χcJ Decays 平荣刚 IHEP, Beijing for the BES Collaboration 中国物理学会2006年秋季会议 CPS2006,Sept. 15 - 17, 2006, Beijing Ping Rong-Gang
Outline:'→ 1. 山' lepton decay decays and 12% rule2. b3. XcJ hadronic decayssummaryLCPS2006,Sept.15-17,2006, BejingPing Rong-Gang
CPS2006,Sept. 15 - 17, 2006, Beijing Ping Rong-Gang
Data samplesMass(MeV)143SL370014M名h.123500P%.2001.Nov.01toYY102002.Mar.0233008310064MW3Sn3M42900YYPC1+0,1,2+01-T2S-wave &0P-waveCBALBESIBESIICLEOcMKIMKIlMKILcharmonium decays6.42 pb-1continuum data atXco Xcl Xc2Ecm=3.65 GeV for bkg studyCPs2006,Sept.15-17,2006, BejingPing Rong-Gang
0 2 4 6 8 10 12 14 MKI MKII MKIII CBAL BESI BESII CLEOc Data samples 3M 14M 6.42 pb-1 continuum data at Ecm=3.65 GeV for bkg study. 4M 2001.Nov.01to 2002.Mar.02 CPS2006,Sept. 15 - 17, 2006, Beijing Ping Rong-Gang
1. (2S) → +-preliminaryFirst observation by DASP:PLB73,109(1978),no BRFirstmeasurement byBESI:PRD65,052004(2002)B=(0.271 ±0.043±0.055)%BrμHBreeBrtV(3/2-02/2）=0u(3/2-02/2）=0-(3/2-02/2)/1-(4m/ /Ms(2s)with vi = VBrBreeBrμμ=0.3885BreeBrupBrTT/0.3885(7.3±0.8)×10-3(7.0±1.1±1.4)×10-37.5±3.1×10CPS2006,Sept. 15 - 17, 2006, BejingPing Rong-Gang
CPS2006,Sept. 15 - 17, 2006, Beijing Ping Rong-Gang
b(2S)20RESINTB(34元0X32242(s-M21QED(s-M2)2+M2T2(s-M2)2+M2S2STJ dr 00(s(1 - a) F((E(2)V2 Jo dVs'e-(Vs-V8)2/22? [1-11(s(1-a))]24m2whereu(1)1(1)-1/2,βF,(a,s): initial state radiation correction;Ref.F.(β): coulomb correction;1.E.A.Kuraev and V.S.Fadin,Yad.Fiz.41,733(1985)2.F.A.Berends,etal.,Phys.Lett.63B,432(1976)Fr(β): final state radiation correction;3.J.M.Wu, High EnergyPhys.,Nucl.Phys.17,379 (1993HI(s) : vacuum polarization effect correctionCPS2006,Sept. 15-17, 2006, BejingPing Rong-Gang
CPS2006,Sept. 15 - 17, 2006, Beijing Ping Rong-Gang