Derivation of the gap and Bethe-Salpeter equations at large $N_c$ limit and symmetry preserving truncations

Hui-Feng Fu, Qing Wang, Libo Jiang

We develop a framework for deriving Dyson-Schwinger Equations (DSEs) and Bethe-Salpeter Equation (BSE) in QCD at large $N_c$ limit. The starting point is a modified form (with auxi…