A string theoretic model of gauge mediated supersymmetry beaking

TL;DR

This paper introduces a supergravity model for dynamical supersymmetry breaking and gauge mediation, embedded in string theory with D-branes, featuring a Polonyi field generated by string instantons and resulting in TeV-scale soft masses.

Contribution

It presents a novel supergravity model of supersymmetry breaking and gauge mediation embedded in string theory with D-branes, including a Polonyi field generated by string instantons.

Findings

A robust supersymmetry breaking minimum compatible with gauge mediation.

Realization of TeV-scale soft masses in a consistent SU(5) GUT model.

String instantons induce the Polonyi term and quartic superpotential terms.

Abstract

We propose a robust supergravity model of dynamical supersymmetry breaking and gauge mediation, and a natural embedding in non-perturbative string theory with D-branes. A chiral field (and its mirror) charged under "anomalous" U(1)'s acts as a Polonyi field whose hierarchical Polonyi-term can be generated by string instantons. Further quartic superpotential terms arise naturally as a tree-level decoupling effect of massive string states. A robust supersymmetry breaking minimum allows for gauge mediation with soft masses at the TeV scale, which we realise for a globally consistent SU(5) GUT model of Type I string theory, with a D1-instanton inducing the Polonyi term.