Strangeness contents of baryons are calculated within the rigid rotator model for arbitrary number of colors $N_c$. The problem of extrapolation to realistic value $N_c=3$ is noted, based on explicit calculations and comparison of the rigid rotator and rigid oscillator variants of the model. Some features of exotic baryon spectra ({$\overline{10}$}, {27}, and {35}-plets of baryons) obtained in the chiral soliton approach can be understood in terms of simplified quark ($4q\overline{q}$) wave functions. The effective mass of strange antiquark in different $SU(3)$ multiplets of pentaquarks should depend on the particular multiplet, to link the predictions of soliton and quark models. The estimate of the $6_F$ and ${\overline{3}}_F$ diquarks mass difference can be made from comparison with chiral soliton model results for masses of exotic baryons from different $SU(3)$ multiplets. The masses of baryons partners with different values of spin $J$ are also estimated.

• Received 30 March 2006

DOI:https://doi.org/10.1103/PhysRevD.73.094018