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Chiral Dynamics and the Low Energy Kaon-Nucleon Interaction

N. Kaiser·P. B. Siegel·W. Weise
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Abstract

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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N. Kaiser, P. B. Siegel, W. Weise. 1995-05-30. Chiral Dynamics and the Low Energy Kaon-Nucleon Interaction. https://doi.org/10.1016/0375-9474(95)00362-5

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