Prospects of realistic Quark-model baryon-baryon interactions*

The QCD-inspired spin-flavor $SU_6$ quark model for the baryon- baryon interaction, proposed by the Kyoto-Niigata group, is a unified model for the full octet-baryons ($B_8=N$, $\Lambda$, $\Sigma$ and $\Xi$), which has achieved very accurate descriptions of the nucleon-nucleon ($NN$) and hyperon-nucleon ($YN$) interactions. The present model, fss2, is not only more sophisticated than the previous model, FSS, for the description of the realistic $NN$ and $YN$ interaction, but also valid for reproducing of the existing experimental data in the strangeness $S=-2$ sector. We attempt to construct the more realistic quark-model baryon- baryon interactions possessing both the desirable feature of the quark model and the accuracy equivalent with fss2 for the experimental data.