engleski

Role of Bare Propagator Poles in Phenomenological Dyson-Schwinger Type Models

The genesis of dressed meson-nucleon scattering matrix poles is presented. A possible scenario for the interrelation of bare and dressed baryon poles is shown by using a particular version of coupled-channel Dyson-Schwinger type model. These fndings are then applied to the Roper resonance, and the conclusion is drawn that it is dynamic in nature. A possible correlation between bare and dressed propagator poles on one side and the quantities of constituent quark model calculations on the other side is discussed.

coupled-channel methods; Dyson-Schwinger type equations; bare and dressed poles

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