Quark spectral functions from spectra of mesons and vice versa
This paper utilizes the QCD functional formalism to extract quark spectral functions by solving coupled Dyson-Schwinger and Bethe-Salpeter equations under the ladder-rainbow approximation, with results validated against the masses and decays of pseudoscalar mesons like the pion and to demonstrate the significance of dynamical charm mass variations and the nature of confinement.