Coupled-channel dynamics

D. Rönchen (UB) / B.-S. Zou (ITP)


Despite the many high quality data on baryon resonances that are available from a variety of pion-,
photon- and electron-induced reactions, we are still far away from a complete and unambiguous
picture of the baryon resonance spectrum. Therefore, the development of reliable tools to connect
theoretical predictions to the available experimental data is essential. When extracting the
spectrum of baryon resonances in the medium energy regime from observables, coupled-channel
dynamics play a crucial role due to the opening of several inelastic channels. Coupled-channel
approaches link the different reaction channels and partial waves and allow for a simultaneous
analysis of multiple reactions with different initial and final states. In this period, we want to further
refine the Jülich-Bonn dynamical coupled-channel model to study vector meson production, KN
reactions to study hyperon resonances, include photoproduction processes on the neutron and
electroproduction reactions and also use an extended dynamical coupled-channels approach to
provide a complete spectrum of P c states in addition to the three newly observed ones by LHCb