Two-dimensional Yang-Mills theory in the leading 1N expansion revisited Original Research Article

We obtain a formal solution of an integral equation for qq bound states, depending on a parameter η which interpolates between ʹt Hooftʹs (η = 0) and Wuʹs (η = 1) equations. We also get an explicit approximate expression for its spectrum for a particular value of the ratio of the coupling constant to the quark mass. The spectrum turns out to be in qualitative agreement with ʹt Hooftʹs as long as η ≠ 1. In the limit η = 1 (Wuʹs case) the entire spectrum collapses to zero, in particular no rising Regge trajectories are found.