Meson-Baryon Coupling Constants in the Quark Model

Baryon-meson Interactions in Chiral Quark Model *

Using the resonating group method (RGM), we dynamically study the baryon-meson interactions in chiral quark model. Some interesting results are obtained: (1) The ΣK state has an attractive interaction, which consequently results in a ΣK quasibound state. When the channel coupling of ΣK and ΛK is considered, a sharp resonance appears between the thresholds of these two channels. (2) The interact...

The Quark-meson Coupling Model

We review the quark-meson coupling model, in which the quark degrees of freedom are explicitly involved to describe the properties of not only nuclear matter but also finite nuclei. Then, we present the electric and magnetic form factors for the proton bound in specific orbits for several closed-shell nuclei. Key-words: quark degrees of freedom, finite nuclei, electromagnetic form factors

Scalar-Meson-Baryon Coupling Constants in QCD Sum Rules

The external-field QCD Sum Rules method is used to evaluate the coupling constants of the light-isoscalar scalar meson (“σ” or ǫ) to the Λ, Σ, and Ξ baryons. It is shown that these coupling constants as calculated from QCD Sum Rules are consistent with SU(3)-flavor relations, which leads to a determination of the F/(F + D) ratio of the scalar octet assuming ideal mixing: we find αs ≡ F/(F + D) ...

Pseudoscalar–meson decuplet–baryon coupling constants in light cone QCD

Taking into account the SU(3)f breaking effects, the strong coupling constants of the π, K and η mesons with decuplet baryons are calculated within light cone QCD sum rules method. It is shown that all coupling constants, even in the case of SU(3)f breaking, are described in terms of only one universal function. It is shown that for Ξ∗0 → Ξ∗0η transition violation of SU(3)f symmetry is very lar...

Vector-meson-baryon coupling constants in QCD sum rules