Towards resonance properties in the Dyson-Schwinger approach

Abstract

We give a brief summary of the Dyson-Schwinger and Bethe-Salpeter approach to hadron spectroscopy and report on recent progress in determining resonance properties in this framework. We exemplify the extraction of resonances using a scalar model, where we solve the scattering equation for the four-point scattering amplitude and extract the pole locations on the second Riemann sheet as well as the phase shifts.

Comments: 7 pages, 5 figures. Proceedings for Light Cone 2019, September 16-20, 2019, Ecole Polytechnique, Palaiseau, France