Chiral dynamics of kaon-nucleon interactions, revisited

Details Chiral dynamics of kaon-nucleon interactions, revisited Chiral dynamics of kaon-nucleon interactions, revisited

2005-05-27

arxiv.org/abs/hep-ph/0505239v1

Eur.Phys.J.A25:79-96,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

30 pages, 14 figures, 11 tables

Scientific paper

10.1140/epja/i2005-10079-1

The anti-kaon nucleon system close to threshold is analyzed in view of the new accurate DEAR kaonic hydrogen data. The calculations are performed using chiral SU(3) effective field theory in combination with non-perturbative schemes based on coupled channels. Several variants of such approaches are compared with experimental data and the differences in the results are discussed. Coulomb and isospin breaking effects turn out to be important and are both taken into account. The pole structure of the Lambda(1405) resonance close to the anti-kaon nucleon threshold is critically examined.

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