Description of SU(3) octet and decuplet baryons

We investigate the structure of the SU(3) s-wave octet and decuplet baryons employing a constituent chiral quark model. We solve a three quark system with the many range Gaussian bases, which allow the baryon to have a [21] flavor-spin symmetry as well as the usual [3] symmetry. The method which we employ here has been shown to work quite nicely to describe the nucleon and $\Delta$ structure. We extend this method in order to take into account a mass difference between ud and strange quarks for both kinetic energy and potential terms. Furthermore we improve the method in order to take care of the strong short range attraction due to the pseudoscalar meson exchange potential. It is found that all octet baryons gain a very strong attraction in the chiral quark model when the semirelativistic approach, namely, the relativistic expression only for the kinetic energy term is employed. It is also found that an inclusion of the additional attraction due to the sigma meson exchange and one gluon exchange potential makes the system unstable in the semirelativistic approach.