- th / 9 50 50 43 v 1 3 0 M ay 1 99 5 Chiral Dynamics and the Low Energy Kaon - Nucleon Interaction ∗
نویسندگان
چکیده
We examine the meson-baryon interaction in the strangeness S = −1 sector using an effective chiral Lagrangian. Potentials are derived from this Lagrangian and used in a coupled-channel calculation of the low energy observables. The potentials are constructed such that in the Born approximation the s-wave scattering amplitude is the same as that given by the effective chiral Lagrangian, up to order q 2. Comparison is made with the available low energy hadronic data of the coupled K − p, Σπ, Λπ system, which includes the Λ(1405) resonance, K − p elastic and inelastic scattering, and the threshold branching ratios of the K − p decay. Good fits to the experimental data and estimates of previously unknown Lagrangian parameters are obtained.
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