We examine how the signature of the strange-dibaryon resonances with I=1/2 and Jπ=0- shows up in scattering amplitudes and observables of the three-body K̄NN-πYN(Y=Σ,Λ) system on the physical real energy axis. The so-called point method is applied to handle logarithmic singularities that appear in solving the Alt-Grassberger-Sandhas equations for the real scattering energies. By taking two different kinds of models for the two-body K̄N-πΣ subsystem, both of which reproduce the available data equally well but give quite a different resonance-pole structure for Λ(1405), we also investigate whether the strange-dibaryon production reactions can be used for disentangling the nature of Λ(1405).
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics