A microscopic theory of gauge mediation

TL;DR

This paper develops a microscopic model of gauge mediation where supersymmetry breaking and messenger sectors are unified within a single SQCD-based framework, resulting in realistic particle masses and spontaneous R-symmetry breaking.

Contribution

It introduces a unified microscopic model of gauge mediation using SQCD, connecting supersymmetry breaking and messenger sectors within a single theory.

Findings

Models break R-symmetry spontaneously

Produce realistic gaugino and sfermion masses

Generate a heavy gravitino

Abstract

We construct models of indirect gauge mediation where the dynamics responsible for breaking supersymmetry simultaneously generates a weakly coupled subsector of messengers. This provides a microscopic realization of messenger gauge mediation where the messenger and hidden sector fields are unified into a single sector. The UV theory is SQCD with massless and massive quarks plus singlets, and at low energies it flows to a weakly coupled quiver gauge theory. One node provides the primary source of supersymmetry breaking, which is then transmitted to the node giving rise to the messenger fields. These models break R-symmetry spontaneously, produce realistic gaugino and sfermion masses, and give a heavy gravitino.