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Chiral dynamics of kaon-nucleon interactions, revisited

  • B. BorasoyEmail author
  • R. Nißler
  • W. Weise
Original Article

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.

PACS.

11.80.-m Relativistic scattering theory 12.39.Fe Chiral Lagrangians 13.75.Jz Kaon-baryon interactions 36.10.Gv Mesonic atoms and molecules, hyperonic atoms and molecules 

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Copyright information

© Società Italiana di Fisica and Springer-Verlag 2005

Authors and Affiliations

  1. 1.Physik DepartmentTechnische Universität MünchenGarchingGermany
  2. 2.Helmholtz-Institut für Strahlen- und Kernphysik (Theorie)Universität BonnBonnGermany

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