Baryon Spectrum And Interactions With Functional Methods

Dr. Gernot Eichmann (host Windisch), IST Lisbon
August 17, 2017 at 3:00 pm
241 Compton
Event Description 

A major goal in studying the strong interaction is an understanding of baryons and their resonances within nonperturbative QCD. In the past years much progress has been made in the description of hadrons using functional methods. The basic ingredients are QCD's n-point functions, which are solved self-consistently and enter in the subsequent calculation of hadron masses, form factors and scattering amplitudes. This allows for a combined description of baryons, light and heavy mesons, tetraquarks and other observables from the same underlying building blocks. I will present results for the light and strange baryon spectrum, obtained from solving the genuine three-body equation as well as its quark-diquark simplification. Both approaches yield similar results, which underlines the role of diquark correlations within baryons. The resulting baryons carry a rich structure with relativistically induced orbital angular momentum that would be forbidden in the non-relativistic quark model. I will conclude with a brief survey of other recent applications, including meson and baryon form factors, the light scalar mesons as tetraquarks, and progress in describing photo- and electroproduction of ordinary and exotic mesons.

Coffee: 2:30 pm, 241 Compton