Metastable supersymmetry breaking and multitrace deformations of SQCD

TL;DR

This paper investigates metastable vacua in supersymmetric QCD with multitrace deformations, showing how these deformations can produce phenomenologically viable models with acceptable fermion masses for direct gauge mediation.

Contribution

It demonstrates that multitrace deformations in SQCD can generate realistic fermion masses and viable metastable vacua suitable for phenomenology.

Findings

Multitrace deformations produce fermion masses proportional to deformation parameters.

Metastable vacua break R-symmetry and are fully Higgsed at one loop.

Models can achieve acceptable phenomenology for gauge mediation.

Abstract

Metastable vacua in supersymmetric QCD in the presence of single and multitrace deformations of the superpotential are explored, with the aim of obtaining an acceptable phenomenology. The metastable vacua appear at one loop, have a broken R-symmetry, and a magnetic gauge group that is completely Higgsed. With only a single trace deformation, the adjoint fermions from the meson superfield are approximately massless at one loop, even though they are massive at tree level and R-symmetry is broken. Consequently, if charged under the standard model, they are unacceptably light. A multitrace quadratic deformation generates fermion masses proportional to the deformation parameter. Phenomenologically viable models of direct gauge mediation can then be obtained, and some of their features are discussed.