The European Physical Journal A

, Volume 35, Issue 3, pp 295–297 | Cite as

Three-body hadronic structure of low-lying 1/2+ Σ and Λ resonances

  • A. Martınez Torres
  • K. P. Khemchandani
  • E. Oset
Regular Article - Theoretical Physics


We discuss the dynamical generation of some low-lying 1/2+ Σ 's and Λ 's in two-meson one-baryon systems. These systems have been constructed by adding a pion in the S -wave to the ¯N pair and its coupled channels, where the 1/2- Λ(1405) -resonance gets dynamically generated. We solve Faddeev equations in the coupled-channel approach to calculate the T -matrix for these systems as a function of the total energy and the invariant mass of one of the meson-baryon pairs. This squared T -matrix shows peaks at the energies very close to the masses of the strangeness -1 , 1/2+ resonances listed in the particle data book.


21.45.-v Few-body systems 14.20.Jn Hyperons 


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Copyright information

© Società Italiana di Fisica and Springer-Verlag 2008

Authors and Affiliations

  • A. Martınez Torres
    • 1
  • K. P. Khemchandani
    • 1
  • E. Oset
    • 1
  1. 1.Departamento de Fısica Teórica and IFICCentro Mixto Universidad de Valencia-CSIC, Institutos de Investigación de PaternaValenciaSpain

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