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Based on the recent study of the magnetic moments and axial constants withinthe framework of the chiral quark-soliton model, we investigate the baryonsemileptonic decay constants $(f_1,f_2)$ and $(g_1, g_2)$. Employing therelations between the diagonal transition matrix elements and off-diagonal onesin the vector and axial-vector channels, we obtain the ratios of baryonsemileptonic decay constants $f_2/f_1$ and $g_1/f_1$. The $F/D$ ratio is alsodiscussed and found that the value predicted by the present model naturallylies between that of the Skyrme model and that of the nonrelativistic quarkmodel. The singlet axial constant $g^{(0)}_A$ can be expressed in terms of the$F/D$ ratio and $g^{(3)}_A$ in the present model and turns out to be small. Theresults are compared with available experimental data and found to be in goodagreement with them. In addition, the induced pseudotensor coupling constants$g_2/f_1$ are calculated, the SU(3) symmetry breaking being considered. Theresults indicate that the effect of SU(3) symmetry breaking might play animportant role for some decay modes in hyperon semileptonic decay.

Semileptonic decay constants of octet baryons in the chiral quark-soliton model