The resonance-like structure in 1D2 and 3F3 nucleon-nucleon phase parameters at medium energy can be understood from the simple dynamics of coupling to the inelastic NNπ channel. In an exactly soluble coupled channel model the analytic structure of the scattering amplitude is studied in detail. The role of the NΔ branch cut and the presence and origin of dynamical poles is discussed.
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics