TeV-scale horizontal symmetry and the slepton mass problem of anomaly mediation

Abstract

We propose a new scenario for solving the tachyonic slepton mass problem of anomaly mediated supersymmetry breaking models with a non-Abelian horizontal gauge symmetry broken at the TeV scale. A specific model based on SU(3) H horizontal symmetry is presented wherein the sleptons receive positive mass-squared from the asymptotically free SU(3) H gauge sector. Approximate global symmetries present in the model strongly suppress flavor changing processes induced by the horizontal vector gauge bosons. The model predicts m h ≲120 GeV for the lightest Higgs boson mass, tan β≃4, and M V =1–4 TeV for the SU(3) H gauge boson masses. The lightest SUSY particle is found to be the neutral wino, which is a candidate for cold dark matter.