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Chiral dynamics in the presence of bound states: kaon-nucleon interactions revisited

J. A. Oller·Ulf-G. Meißner
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Abstract

We study the S-wave kaon-nucleon interactions for strangeness S=-1 in a novel relativistic chiral unitary approach based on coupled channels. Dispersion relations are used to perform the necessary resummation of the lowest order relativistic chiral Lagrangian. A good description of the data in the K^- p, πΣand πΛchannels is obtained. We show how this method can be systematically extended to higher orders, emphasizing its applicability to any scenario of strong self-interactions where the perturbative series diverges even at low energies. Discussions about the differences to existing approaches employing pseudo-potentials in a regulated Lippmann-Schwinger equation are included. Finally, we describe the resonance content of our meson-baryon amplitudes and discuss its nature.

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J. A. Oller, Ulf-G. Meißner. 2000-11-10. Chiral dynamics in the presence of bound states: kaon-nucleon interactions revisited. https://doi.org/10.1016/s0370-2693(01)00078-8

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