Partial Wave Analysis Of J/Ψ�'γK～*(?)～*

Gluon self-coupling in quantum chromodynamics (QCD) suggests the existence of glueballs, bound states of mainly gluons. The unambiguous identification of such states would be an essential proof of the validity of QCD. Lattice QCD and other theoretical models predict that the lowest 0-+ glueballs have masses range 2.0 to 2.4 GeV; the lowest 2++ glueballs is predicted at about 2.2 GeV.Using the 58 million J/ψ data collected by BES II at the Beijing Electron Positron Col-lider(BEPC), the J/ψ-rK*K* channel is analyzed into Partial Waves.First, Three different fit methods are employed for global fit. We find that the dominant component is 0-+ structure (~ 53%), some component is 2++ structure (~ 30%). And there is c(1S) contribution at high mass end of K*K*. The broad 0~+ structure is probably the contribution of the 0-+ blueball which is predicted by lattice gauge theory in this mass region; the 2++ component is the contribution of f2(1950). After getting the best result, we change the number of resonances and amplitudes to check the result of the analysis. We find that the partial wave analysis can separate different spin-parity. Our result of global fit is reasonable.Second, to eliminate the influence of the energy depended term in the partial wave amplitude formula, we employ two kind of bin-by-bin fit without inter resonances. The two bin-by-bin fits are consistent with each other. And bin-by-bin fits are consistent with global fits.The 0-+ shape in J/ψ -rK*K* channel that we get from BES II data will play an important role in getting the high mass shape of glueball candidate (2190). We do not find distinguishable evidence of 0++, 1++ or 4++ component in our analysis. The absence of f0(2100) from the present data shows it does not strongly couple to K*K*. Therefore f0(2100) is probably not an ss state.Finally, the branching ratios of different resonance are calculated.Br(J/ψ→ r0-) x Br(0- →K*K*) = (3.93 ± 0.31 ± 0.42) x 10-3;Br(J/ψ→ηrc) x Br(ηc→K*K*) = (3.00 ± 0.22 ±0.45) x 10-4;Br(J/ψ→ r2+) x Br(2+→ K*K*) = (1.73 ± 0.20 ± 0.18) x 10-3;Br(J/ψ→r2-) x Br(2→ K*K*) = (4.59 ± 1.35 ± 0.50) x 10-4.