Chiral dynamics and the low-energy kaon-nucleon interaction
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 length is the same as that given by the effective chiral Lagrangian, up to order q2. 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.
- Publication:
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Nuclear Physics A
- Pub Date:
- February 1995
- DOI:
- 10.1016/0375-9474(95)00362-5
- arXiv:
- arXiv:nucl-th/9505043
- Bibcode:
- 1995NuPhA.594..325K
- Keywords:
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- Nuclear Theory
- E-Print:
- 20 pages, 10 postscript figures, uses revtex, e-mail addresses: Norbert.Kaiser@physik.tu-muenchen.de, Peter.Siegel@physik.tu-muenchen.de, Wolfram.Weise@physik.tu-muenchen.de