Description
Guided by modern String Theory We propose a robust supergravity model of dynamical supersymmetry breaking and gauge mediation. The Polonyi field (and its mirror) is a chiral field, charged under
``anomalous'' U(1)'s, with hierarchical Polonyi-term which can be generated by string instantons, and quartic superpotential terms which arise naturally as a tree-level decoupling effect of massive string states.
A stable supersymmetry breaking minimum allows for the realisation of gauge mediation with soft supersymmetry breaking masses at the TeV scale which we realise for a globally consistent SU(5) GUT model of Type I string theory, with an D1-instanton inducing the Polonyi term.
