Chiral dynamics and the low-energy kaon-nucleon interaction

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...

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Bibliographic Details
Published in:Nuclear physics. A 1995-11, Vol.594 (3), p.325-345
Main Authors: Kaiser, N., Siegel, P.B., Weise, W.
Format: Article
Language:English
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Summary: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 length is the same as that given by the effective chiral Lagrangian, up to order q 2. A 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.
ISSN:0375-9474
DOI:10.1016/0375-9474(95)00362-5