Coupled channel Faddeev calculations of a quasibound state

The system is studied using separable interactions fitted to data available on the s-wave –πY subsystem and the p-wave πN, πY, ππ and subsystems. Three-body –πYπ coupled channel Faddeev equations with relativistic kinematics are solved in search for poles in the complex energy plane. A quasibound pole with quantum numbers is found near and below the threshold, its precise location depending sensitively on the poorly known shape of the p-wave πY interaction. This quasibound state suggests the existence of a D13 Σ resonance with width about 60 MeV near threshold (M≈1570 MeV), excluding meson absorption contributions.