Exact mquark ≠ 0 condensates in QCD1+1(NC → ∞)

In the limit of an infinite number of colors, we derive an analytic expression for the quark condensation in QCD1+1 as a function of the quark mass and the gauge coupling constant. For zero quark mass, a nonvanishing quark condensate is obtained. Nevertheless, we prove that there is no phase transition as a function of the quark mass. It is furthermore shown that the expansion of left-angle 0|bar ψψ|0 right-angle in the gauge coupling has zero radius of convergence but that the perturbation series is Borel summable with finite radius of convergence. The nonanalytic behavior mq→0 ∼ -NC√G2 can only be obtained by summing the perturbation series to infinite order