Properties of Pseudoscalar Mesons in a Contact Interaction Model.

We study the properties of pseudoscalar mesons, pion, kaon, η and η ′ , and compute the γ ∗ γ → π 0 , η , η ′ transition form factor in the framework of the Schwinger–Dyson equations and Bethe–Salpeter equations, using a momentum independent contact interaction. The contact interaction is capable to describe the observable properties, but produces a transition form factor whose evolution for large Q 2 disagrees with experiment and perturbative QCD. Invited contribution to a Special Issue of Few Body Systems: "Emergence and Structure of Baryons—Selected Contributions from the International Conference Baryons 2022" [ABSTRACT FROM AUTHOR]