MULTIFLAVOR MASSIVE SCHWINGER MODEL WITH NON-ABELIAN BOSONIZATION

We revisit the treatment of the muitiflavor massive Schwinger model by non-Abelian bosonization. We compare three different approximations t o the low-lying spectrum: (i) reading it off from the bosonized Lagran gian (neglecting interactions), (ii) semiclassical quantization of the static soliton, (iii) approximate semiclassical quantization of the ' 'breather'' solitons. A number of new points are made in this process. We also suggest a different ''effective low-energy Lagrangian'' for t he theory which permits easy calculation of the low-energy scattering amplitudes. It correlates an exact mass formula of the system with the requirement of the Mermin-Wagner theorem.