Exotic multi-quark states and baryon spectroscopy workshop

The baryon resonance spectrum in Jülich-Bonn dynamical coupled-channel model

Not scheduled

1h

Wolfgang Paul Hörsaal (Universitätsclub Bonn, the University of Bonn)

Speaker

Deborah Rönchen (Forschungszentrum Jülich)

Description

In order to connect predictions for the baryon spectrum in the non-perturbative energy regime from quark models or lattice calculations to experimental data, coupled-channel frameworks are especially suited. In those approaches a simultaneous partial-wave analysis of multiple reactions with different initial and final states is performed.
I will present recent results from the Jülich-Bonn dynamical coupled-channel approach, where the spectrum of nucleon and Delta resonances is extracted based on a combined study of the pion- and photon-induced reactions. The amplitudes of the Juelich-Bonn model also enter the study of electroproduction reactions as constraints at Q^2=0 and allow the determination of baryon transition form factors beyond the Roper and Delta(1232) resonances.
The Jülich-Bonn approach was also extended to hidden-charm reactions including the $J/\psi p$ channel to explore possible $P_c$ states.