2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/179718There are supersymmetric gauge theories which do not possess any parameters nor flat directions, and hence cannot be studied anywhere in the field space using holomorphy (``non-calculable''). Some of them are believed to break supersymmetry dynamically. We propose a simple technique to analyze these models. Introducing a vector-like field into the model, one finds flat directions where one can study the dynamics. We unambiguously show that the supersymmetry is broken when the mass of the vector-like field is small but finite, and hence Witten index vanishes. If we increase the mass of the vector-like field, it eventually decouples from the dynamics and the models reduce to the original non-calculable models. Assuming the continuity of the Witten index in the parameter space, one can establish the dynamical supersymmetry breaking in the non-calculable models.11 pages, LaTeX, requires Psfig1.9, 1 figure in a uuencoded tar-compressed EPS fileHigh Energy Physics - TheoryHigh Energy Physics - Phenomenologytext