σ exchange in the one-boson exchange model involving the ground state octet baryons

Based on the one -boson -exchange framework that the sigma meson serves as an effective parametrization for the correlated scalar-isoscalar xx interaction, we calculate the coupling constants of the sigma to the 1 + ground 2 state light baryon octet B by matching the amplitude of B former is calculated using a dispersion relation, supplemented with chiral perturbation theory results for the BBxx couplings and the Muskhelishvili-Omne`s representation for the xx rescattering. Explicitly, the coupling constants are obtained as gNN sigma = 8.7+1.7-1.9, g sigma sigma sigma = 3.5+1.8-1.3, g Xi Xi sigma= 2.5+1.5-1.4, and g Lambda Lambda sigma = 6.8+1.5 -1.7. These coupling constants can be used in the one -boson -exchange model calculations of the interaction of light baryons with other hadrons. B over bar -> xx -> B over bar B to that of B B over bar -> sigma -> B over bar B. The