https://doi.org/10.1140/epja/i2005-10079-1
Original Article
Chiral dynamics of kaon-nucleon interactions, revisited
1
Physik Department, Technische Universität München, D-85747, Garching, Germany
2
Helmholtz-Institut für Strahlen- und Kernphysik (Theorie), Universität Bonn, Nußallee 14-16, D-53115, Bonn, Germany
* e-mail: borasoy@itkp.uni-bonn.de
Received:
21
April
2005
Accepted:
31
May
2005
Published online:
18
July
2005
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 –
© Società Italiana di Fisica and Springer-Verlag, 2005
