SU(3)-flavour breaking in octet baryon masses and axial couplings
  The lightest baryon octet is studied within a covariant and confining Nambu--Jona-Lasinio model. By solving the relativistic Faddeev equations including scalar and axialvector diquarks, we determine the masses and axial charges for \Delta S = 0 transitions. For the latter the degree of violation of SU(3) symmetry arising because of the strange spectator quark(s) is found to be up to 10%. 
Manuel E. Carrillo-Serrano, Ian C. Clo\"et and Anthony W. Thomas
nucl-th hep-ph