2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/229007We study aspects of Wess-Zumino models related to SUSY and R-symmetry breaking at tree-level. We present a recipe for constructing a wide class of tree-level SUSY and R-breaking models. We also deduce a general property shared by all tree-level SUSY breaking models that has broad application to model building. In particular, it explains why many models of direct gauge mediation have anomalously light gauginos (even if the R-symmetry is broken spontaneously by an order one amount). This suggests new approaches to dynamical SUSY breaking which can generate large enough gaugino masses.23 pages. v2: references added, minor changes. v3: comment on non-renormalizable case addedHigh Energy Physics - TheoryHigh Energy Physics - Phenomenologytext