Mainz 2022 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 19: Hadron Structure and Spectroscopy III
HK 19.4: Talk
Monday, March 28, 2022, 17:00–17:15, HK-H8
Meson Spectrum from Functional Methods beyond Rainbow-Ladder — •Stephan Hagel1,2 and Christian S. Fischer1,2 — 1Institut für Theoretische Physik, Justus-Liebig-Universität Gießen, 35392 Gießen, Germany — 2Helmholtz Forschungsakademie Hessen für FAIR (HFHF), GSI-Helmholtzzentrum für Schwerionenforschung, Campus Gießen, 35392 Gießen, Germany
A novel approach to construct an expression for the quark self-energy from a Bethe-Salpeter kernel is presented. It can be shown that this approach satisfies the axialvector Ward-Takahashi identity. This approach is used to calculate the quark propagator and solve the corresponding Bethe-Salpeter equation. Furthermore, it is investigated, how different tensor structures in the quark-gluon-vertex effect the light meson spectrum.