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Chiral dynamics of kaon-nucleon interactions, revisited

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Abstract.

The ¯N 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 Λ(1405)-resonance close to the ¯N threshold is critically examined.

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Authors and Affiliations

  1. Physik Department, Technische Universität München, D-85747, Garching, Germany

    B. Borasoy, R. Nißler & W. Weise

  2. Helmholtz-Institut für Strahlen- und Kernphysik (Theorie), Universität Bonn, Nußallee 14-16, D-53115, Bonn, Germany

    B. Borasoy & R. Nißler

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  1. B. Borasoy
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  2. R. Nißler
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  3. W. Weise
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Correspondence to B. Borasoy.

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Th. Walcher

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Borasoy, B., Nißler, R. & Weise, W. Chiral dynamics of kaon-nucleon interactions, revisited. Eur. Phys. J. A 25, 79–96 (2005). https://doi.org/10.1140/epja/i2005-10079-1

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  • DOI: https://doi.org/10.1140/epja/i2005-10079-1

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