Compact Supersymmetry

TL;DR

This paper introduces a minimal model of supersymmetry with geometric breaking in extra dimensions, resulting in a nearly degenerate superparticle spectrum and improved phenomenology with less fine-tuning.

Contribution

It presents a new minimal supersymmetric model with a single extra dimension that naturally avoids flavor and CP problems and enhances Higgs mass without extensive parameter tuning.

Findings

Nearly degenerate superparticle spectrum reduces LHC bounds

Model has fewer free parameters than CMSSM

Less fine-tuning required for viable phenomenology

Abstract

Supersymmetry broken geometrically in extra dimensions naturally leads to a nearly degenerate spectrum for superparticles, ameliorating the bounds from the current searches at the LHC. We present a minimal such model with a single extra dimension, and show that it leads to viable phenomenology despite the fact that it essentially has two less free parameters than the conventional CMSSM. The theory does not suffer from the supersymmetric flavor or CP problem because of universality of geometric breaking, and automatically yields near-maximal mixing in the scalar top sector with |A_t| ~ 2 m_{\tilde{t}} to boost the Higgs boson mass. Despite the rather constrained structure, the theory is less fine-tuned than many supersymmetric models.