Structure of $λ^*$(1405) and the $λ^*$-Meson-Baryon Coupling Constants

Within an extended chiral constituent quark model, three- and five-quark structure of the $S_{01}$ resonance $Λ(1405)$ is investigated with respect to the coupling constants $g^2_{Λ^* πΣ}$ and $g^2_{Λ^* \bar{K} N}$. Our findings corroborate with about 50% of five-quark admixture in the $Λ(1405)$ needed in reproducing the strong decay width, $Γ_{Λ(1405)\to (Σπ)^\circ}$.

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