SEMILEPTONIC DECAY CONSTANTS OF OCTET BARYONS IN THE CHIRAL QUARK-SOLITON MODEL

Based on the recent study of the magnetic moments and axial-vector con stants within the framework of the chiral quark-soliton model, we inve stigate the baryon semileptonic decay constants (f(1)f(2)) and (g(1),g (2)) Employing the relations between the diagonal transition matrix el ements and off-diagonal ones in the Vector and axial-vector channels, we obtain the ratios of baryon semileptonic decay constants f(2)/f(1) and g(1)/f(1). The F/D ratio is also discussed and found that the valu e predicted by the present model naturally lies between that of the Sk yrme model and that of the nonrelativistic quark model. The singlet ax ial-vector constant g(A)((0)) can be expressed in terms of the F/D rat io and g(A)((3)) in the present model and turns out to be small. The r esults are compared with available experimental data and found to be i n good agreement with them. In addition, the induced pseudotensor coup ling constants g(2)/f(1) are calculated, the SU(3) symmetry breaking b eing considered. The results indicate that the effect of SU(3) symmetr y breaking might play an important role for some decay modes in hypero n semileptonic decay. [S0556-2821(97)02923-8].