Natural semi-direct gauge mediation and D-branes at singularities

TL;DR

This paper explores semi-direct gauge mediation with composite messengers in D-brane models at Calabi-Yau singularities, highlighting its naturalness and providing explicit examples with phenomenological insights.

Contribution

It demonstrates how semi-direct gauge mediation can be embedded in D-brane quiver theories with composite messengers, offering a novel approach to supersymmetry breaking.

Findings

Composite messengers naturally acquire mass via quartic superpotential couplings.

Embedding in D-brane models is straightforward and phenomenologically viable.

Several explicit models illustrate the approach's feasibility.

Abstract

We consider semi-direct gauge mediation models of supersymmetry breaking where the messengers are composite fields and their supersymmetric mass is naturally generated through quartic superpotential couplings. We show that such composite messenger models can be easily embedded in quiver gauge theories arising from D-branes at Calabi-Yau singularities, and argue that semi-direct gauge mediation is in fact a very natural option for supersymmetry breaking in D-brane models. We provide several explicit examples and discuss their salient phenomenological properties.