Reanalysis of the most strange dibaryon within constituent quark models

The most strange dibaryon Omega Omega with quantum numbers S = -6, I = 0, and J(p) = 0(+), 1(-), 2(+), 3(-) is reanalyzed in the framework of a quark delocalization color screening model (QDCSM) and chiral quark model (ChQM). The Omega Omega dibaryon with J(p) = 0(+) is bound, and the one with other quantum numbers J(p) = 1(-), 2(+), 3(-) are all unbound in our calculation. The low-energy scattering phase shifts, the scattering length, and the effective range of the Omega Omega dibaryon with J(p) = 0(+) also support the existence of such strange dibaryon. This dibaryon is showed to be a shallow bound state in QDCSM, while the binding energy becomes much larger in the ChQM by including the effect of the hidden color channels coupling. And the scalar nonet meson exchange in the ChQM also provides more attraction for the Omega Omega system. Experimental search for such most strange dibaryon will provide much information for understanding the hadron-hadron interactions in different quark models.