2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/203482Supersymmetry breakdown via gaugino condensation in heterotic string theory can lead to models with a doubly suppressed gravitino mass. A TeV scale gravitino can emerge from a condensate as large as the grand unified scale. We analyze the properties of these models and discuss applications for particle physics and cosmology.23 pages, 4 figuresHigh Energy Physics - TheoryHigh Energy Physics - Phenomenologytext