fo(1710)Clear f0(1710) peak in200JIKK.fo(1710)J/y→oK*KM=1740±30MeVS100FI=125±20 MeV50M(KK)(GeV/)No f.(1710) observed in2000NO fo(1710)J/→元元！J/→0元*元BR(f(1710)→元元)E1000<0.13 @95%CLBR(.(1710) -→ KK5000.3M(元*元)(GeV/)62026/9/17Phys. Lett. B 603 (2004) 138
2026/9/17 《全国第七届高能物理年会》 6 • Clear f0(1710) peak in J/ KK. • No f0 (1710) observed in J/ → ! f0 (1710) → + − J / K K → + − J / f0 (1710) NO f0 (1710) MeV M MeV 125 20 1740 30 = = CL BR f KK BR f 0.13 @95% ( (1710) ) ( (1710) ) 0 0 → → Phys. Lett. B 603 (2004) 138
fo(1710)J/y→K+K600fo(1710)PWA analysis shows400one scalar in 1.7 GeV region200M=1740±49MeVT=166$+1MeVJ/y→kfo(1710)100Phys. Rev. D 68 (2003) 05200350O1.5n2.5M(KK)(GeV/c)2026/9/17《全国第七届高能物理年会》
2026/9/17 《全国第七届高能物理年会》 7 → + − J / K K 0 0 / Ks Ks J → (1710) 0 f (1710) 0 f 166 MeV 1740 4 MeV 5 15 8 10 10 25 + + − − + − = M = PWA analysis shows one scalar in 1.7 GeV region Phys. Rev. D 68 (2003) 052003 f0 (1710)
J/—→>+,J/→>元000OBKG:2003000BKG:J/-→p元J/y-→m150J/y→m'2000100100050Nn0.5M(元元(GeV/3)M元元f.(1500)f(1710)0) (),(0) (),864422082026/9/17《全国第七届高能物理年会》
2026/9/17 《全国第七届高能物理年会》 8 J/→+ - , J/→0 0 BKG: J/→ J/→’ BKG: J/→ f0 (1500) f0 (1710)
PWA of J/y → 元元For global fit, the channels fitted in PWAJ/→f2(1270)→fo(1500)→fo(1710)f2(1810)+fo(2020)f2(2150)*f4(2050).fixtheparametersoff,(1810).fo(2020)f2(2150)andf4(2050)toPDGvalues92026/9/17《全国第七届高能物理年会》
2026/9/17 《全国第七届高能物理年会》 9 • For global fit, the channels fitted in PWA ▪ fix the parameters of f2 (1810),f0 (2020), f2(2150) and f4(2050) to PDG values. PWA of J/ →