'-→VTPRD69(2004)07200obs1'XY山BX山-MCN..·B.EX-Y山B J/v-x(10-3)BVT3y'-x (10-4)Qh(%)mode(BES-II)(PDG2002)2.05 ±0.41wf24.3 ±0.64.8 ±1.5±0.382.55 ±0.7310.9 ±2.22.3 ±1.1pa2±0.471.86 ±0.32K*K*26.7 ±2.62.8 ±1.3±0.43t This value0.44 ±0.12f'3.6 ±1.51,.236, itl3besse±0.T2006.sept 15Ping Rong-Gang
M C ψ ' X Y obs ψ ' X Y ψ ' X N B ε n B = → → → → † This value from DM2 only Suppressed!! 12 % rule ’→ V T VT mode B’ →X (10 – 4 ) (BES-II) B J/→X (10 – 3 ) (PDG2002) Qh (%) f2 2.05 ±0.41 ±0.38 4.3 ±0.6 4.8 ±1.5 a2 2.55 ±0.73 ±0.47 10.9 ±2.2 2.3 ±1.1 K* K* 2 1.86 ±0.32 ±0.43 6.7 ±2.6 2.8 ±1.3 f2 ' 0.44 ±0.12 ±0.11 1.23 ±0.21 † 3.6 ±1.5 PRD69(2004)07200 1 CPS2006,Sept. 15 - 17, 2006, Beijing Ping Rong-Gang
PRD71.072006(2005);PRD74,12004(2006)y'→3-body10025final statesppTppn802060256±1815pp44.8±8.7410are used for520pp°(n)000.40.50.60.700.10.20.40.3Ymass (Gevic)rymass(GeV/c2)Branchingfractionsofab(2S)-Mppare usefull for pp annihilation erperiment PRD73,096003 (2006)Main BG.150(b)()S914±42(a)forpnT921±40100pnT100BBM f.s.501. pn元-502. pn一元03. p一元0.600.700.800.901.001.101.20recoilmassofp元(GeV/c3)0.600.700.800.901.001.101.20recoilmassofp元(GeVlc")CPS2006,Sept.15-17,2006,BeijingPing Rong-Gang
’→ 3-body 921±40 914±42 256±18 44.8±8.7 PRD71,072006(2005); PRD74, 12004 (2006) CPS2006,Sept. 15 - 17, 2006, Beijing Ping Rong-Gang
BESII:PRD71,072006(2005)y'→3-bodyBESII:PRD74,12004(2006)ModeQh(%)BJ/±→x(10-3)tBμ(2S)→x(10-4)2.02±0.1712.1 ± 1.6pn-2.45±0.11 ±0.21pn+2.52±0.12±0.221.93±0.1713.1 ± 1.8ppr01.32 ± 0.10 ± 0.151.09 ±0.0912.1 ± 1.90.58±0.11±0.072.09±0.182.8 ± 0.7ppn+ : PDG valueB(pp°) : B(pn-) : B(p+) ～ 1 : 2 : 2CPS2006,Sept. 15 - 17, 2006, BejingPing Rong-Gang
Suppressed!! ’→ 3-body BESII: PRD71, 072006 (2005) BESII: PRD74, 12004 (2006) CPS2006,Sept. 15 - 17, 2006, Beijing Ping Rong-Gang