Confinement, soft supersymmetry breaking and θ parameter dependence in the Seiberg-Witten model

By using the standard perturbation theory we study the mass and θ parameter dependence of the Seiberg-Witten theory with SU(2) gauge group, supplemented with a N = 1 supersymmetric as well as a smaller nonsupersymmetric masses. Confinement persists at all values of the bare vacuum parameter θ_ph at θ_ph = -π, π, 3π, ..., however, the ground state is doubly degenerate and CP invariance is spontaneously broken à la Dashen. Due to the instanton-induced renormalization effects the low energy effective θ parameter remains small irrespectively of θ_ph as long as the supersymmetry breaking (e.g. gaugino) mass is sufficiently small. Oblique confinement does not take place in this model.