  The Omega-Omega (SIJ=-6,0,0) dibaryon state is studied with the extended
quark-delocalization color-screening model including a pi meson exchange tail,
which reproduces the properties of the deuteron quantitatively. We find the
mass of the di-Omega to be about 45 MeV lower than the Omega-Omega threshold.
The effect of channel coupling due to the tensor force has been calculated and
found to be small in this case. We have also studied the effect of other
pseudoscalar meson exchanges and sensitivity to the short-range cutoff radius,
r_0, for the meson exchanges.
