DIBARYON SIGNALS IN NN SCATTERING DATA AND FURTHER MEASUREMENT AT COSY, LEPS AND CSR

The N Δ and ΔΔ dibaryon resonances are studied by calculating the NN scattering phase shifts with explicitly coupling these dibaryon channels in a multi-channel coupling calculation with two quark models. These quark models, the chiral quark model and quark delocalization color screening model, describe the NN S-, D-wave phase shifts below the π production threshold quantitatively well. Both quark models predict that the 1D2 resonance discovered in NN partial wave phase shift analysis and the J = 1 or 3 isoscalar resonance recently reported by CELSIUS-WASA Collaboration are N Δ5S2 and ΔΔ7S3 resonance respectively. Further measurements at COSY, LEPS and Lanzhou Cooling Storage Ring (CSR) to check the ΔΔ resonance are discussed.