(元 + 元-)(K +K-)BES:PRD72,092002(2005)SNf(980)fo(2200)100fo(1710)(a)2.4fe(1370)405020p(770)OO0.50.51.5LM(元元)(GeV/c3)M(r'm)(Gevle)M(K*K)(GeV/cB[Xco → fo(980)fo(980)]B[f(980) → π+]B[f(980) → K+K-] = (1.73 ± 0.42±8:98) × 10-4B[Xco → f(980 o(2200)]3[f(980) → #+ -J3[f(2200) → K+K-] = (8.42 ± 1.16±:5) × 10-4B[xco → fo(1370)fo(1710)]B[fo(1370) → #+13[fo(1710) → K+K-}= (7.12±1.46:2) × 10-4B[xXco → fo(1370)fo(1370)]B[fo(1370) →π+]B[fo1370) →K+K-] < 2.9 ×10-4,B[xc0 → fo(1370)fo(1500))B[fo(1370) →π+)B[fo(1500) → K+K-] <1.8 ×10-4B[xco → fo(1500)fo(1370)]B[fo(1500) →π+-]B[fo1370) → K+K-] < 1.4 × 10-4B[Xco → fo(1500)fo(1500)]B[fo(1500) →π+-]B[fo(1500) → K+K-] < 0.55 × 10-4B[Xco → fo(1500)fo(1710)]B[fo(1500) →元+-JB[fo(1710) →K+K-] <0.73× 10-4Q. Zhao, PRD72, 074001 (2005), try to understand these data and the
( + − )(K +K − ) f0 (1710) f0 (2200) f0 (980) f0 (1370) (770) BES: PRD72, 092002 (2005) Q. Zhao, PRD72, 074001 (2005), try to understand these data and the scalars
BES:PRD72,092002 (2005)) ((K+元-)(K-元+)(b)7Decay modeBr(Xco-X→K+K元+元(8.09±1.69+2:29))×10-4K*(892)°K*(892)91.992(10.44 ±2.37+3.0)1.90)×10-4K(1430)K(1430)(8.49 ±1.66)×10-41.5K*(1430)K(1430)+c.c.Br(Xco → K*(892)°K*(892)°) =(1.82 ± 0.38+0.)0×10-3BES.PRD70.092003(200421.52.5Br(xco → K*(892)°K*(892)°) =M(K)(GeV/c)(1.78 ±0.34 ±0.34) ×10-3MOSNK*(892)0Po/sa(c)With (c)Without200K*0^2(1430)OEKappa-kappaKappa-kappa△S=39.K*(1950)1100100100%.51.522.500M(K元) (GeV/c2)00.5121.52.M(K元) (GeV/c3)M(K元)(GeV/c2
(K + − )(K − + ) K*0/2(1430) K*0 (1950) K*(892)0 With Kappa-kappa Without Kappa-kappa DS=39. BES: PRD72, 092002 (2005)
BES,%c0→元*元-K*K(K元元)KBES:PRD72,092002(2005)150OSSKi（1270）→K*（892)元（16%）1371 eventsK,(1270)40K,(1400)100K,(1270)A1（1400）-（892）元（94%）2050M(K元)C[896±60|MeV021.5M(K元元)(GeV/3)021.52.531caDOOOSM(K元元）（GeV/c2)40K.(1270)B(xco → K1(1270)* KF) = (6.66 ± 1.07±1:60) × 10-3Ki(1270)-Kp(42%B(xco → K1(1400)±K于) < 2.85 × 10-320The mixing angle betweenKiAandKiB0>57degreeswhile in y'decays to KikM(元元)C[700,850]MeVtheangleis0<29degrees0(PEL83p1918).Why?21.52.52MK元元）（CeV/c
1371 events M(K) [896±60] MeV M( ) [700,850] MeV K1 (1270) K1 (1270) K1 (1400) K1 (1270) BES, c0→ + −K +K − The mixing angle between K1A and K1B >57 degrees, while in y’ decays to K1K, the angle is <29 degrees (PEL83p1918). Why? (K )K BES: PRD72, 092002 (2005)