Meson-baryon coupling constants of the SU(3) baryons with flavor SU(3) symmetry breaking

TL;DR

This paper calculates meson-baryon coupling constants within a chiral quark-soliton model, accounting for SU(3) symmetry breaking, and compares results with experimental data and other models, providing predictions for Omega baryons.

Contribution

It introduces a comprehensive calculation of meson-baryon coupling constants including SU(3) symmetry breaking effects using the chiral quark-soliton model, with parameters fixed by experimental data.

Findings

Strong decay widths of baryon decuplet agree with experimental data.

SU(3) symmetry breaking significantly affects eta' coupling constants.

Predictions made for Omega baryon coupling constants.

Abstract

We investigate the strong coupling constants for the baryon octet-octet, decuplet-octet, and decuplet-decuplet vertices with pseudoscalar mesons within a general framework of the chiral quark-soliton model, taking into account the effects of flavor SU(3) symmetry breaking to linear order in the expansion of the strange current quark mass. All relevant dynamical parameters are fixed by using the experimental data on hyperon semileptonic decays and the singlet axial-vector constant of the nucleon. The results of the strong coupling constants for the baryon octet and the pseudoscalar meson octet are compared with those determined from the J\"ulich-Bonn potential and the Nijmegen extended soft-core potential for hyperon-nucleon scattering. The results of the strong decay widths of the baryon decuplet are in good agreement with the experimental data. The effects of $SU_f(3)$ symmetry breaking are sizable on the $\eta'$ coupling constants. We predict also the strong coupling constants for the $\Omega$ baryons.