Coupled channel Faddeev calculations of a (Kbar-N-pi) quasibound state

Details Coupled channel Faddeev calculations of a (Kbar-N-pi) quasibound state Coupled channel Faddeev calculations of a (Kbar-N-pi) quasibound state

2011-03-24

arxiv.org/abs/1103.4757v2

Nucl.Phys.A864:153-166,2011

Physics

Nuclear Physics

Nuclear Theory

18 pages, 4 figures, 4 tables; v2--extended discussion of form-factor sizes on p.10, accepted for publication in Nucl. Phys. A

Scientific paper

10.1016/j.nuclphysa.2011.06.022

The (Kbar-N-pi) system is studied using separable interactions fitted to data available on the s-wave (Kbar-N)--(pi-Y) subsystem and the p-wave (pi-N),(pi-Y),(pi-pi) and (pi-Kbar) subsystems. Three-body (Kbar-N-pi)--(pi-Y-pi) coupled channel Faddeev equations with relativistic kinematics are solved in search for quasibound poles in the complex plane, leading to a I(JP)=1(3/2-) (Kbar-N-pi) quasibound state at M ~ (1570 +/- 10) MeV and width greater than 60 MeV near the (Kbar-N-pi) threshold. A D13 Sigma(1570) resonance of molecular structure is thus predicted.

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