Affine Toda model coupled to matter and the string tension in QCD$_{2}$

The $sl(2)$ affine Toda model coupled to matter (ATM) is shown to describe various features, such as the spectrum and string tension, of the low-energy effective Lagrangian of QCD$_{ 2}$ (one flavor and $N$ colors). The corresponding string tension is computed when the dynamical quarks are in the { \sl fundamental} representation of SU(N) and in the { \sl adjoint} representation of SU(2).

Categories: hep-th nlin.SI