Instantaneous Bethe-Salpeter kernel for the lightest pseudoscalar mesons
Instantaneous Bethe-Salpeter kernel for the lightest pseudoscalar mesons
Starting from a phenomenologically successful, numerical solution of the Dyson-Schwinger equation that governs the quark propagator, we reconstruct in detail the interaction kernel that has to enter the instantaneous approximation to the Bethe-Salpeter equation to allow us to describe the lightest pseudoscalar mesons as quark-antiquark bound states exhibiting the (almost) …