TeV-Scale Horizontal Symmetry and the Slepton Mass Problem of Anomaly Mediation

Details TeV-Scale Horizontal Symmetry and the Slepton Mass Problem of Anomaly Mediation TeV-Scale Horizontal Symmetry and the Slepton Mass Problem of Anomaly Mediation

2003-12-15

arxiv.org/abs/hep-ph/0312176v1

Nucl.Phys. B686 (2004) 135-154

Physics

High Energy Physics

High Energy Physics - Phenomenology

25 pages in LaTeX, 2 eps figures

Scientific paper

10.1016/j.nuclphysb.2004.02.025

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{beta} nearly equal to 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.

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