A natural little hierarchy for RS from accidental SUSY

TL;DR

This paper employs supersymmetry within Randall-Sundrum models to naturally generate a hierarchy between the IR and electroweak scales, addressing the little hierarchy problem with a novel low-energy sparticle spectrum and an IR brane singlet Higgs.

Contribution

It introduces a supersymmetric framework in RS models that stabilizes the hierarchy and decouples problematic sparticle generations while protecting gaugino masses.

Findings

IR scale stabilized around 10 TeV

Light sparticle spectrum includes stops, gauginos, Higgsinos

Amelioration of the little hierarchy problem with a singlet Higgs

Abstract

We use supersymmetry to address the little hierarchy problem in Randall-Sundrum models by naturally generating a hierarchy between the IR scale and the electroweak scale. Supersymmetry is broken on the UV brane which triggers the stabilization of the warped extra dimension at an IR scale of order 10 TeV. The Higgs and top quark live near the IR brane whereas light fermion generations are localized towards the UV brane. Supersymmetry breaking causes the first two sparticle generations to decouple, thereby avoiding the supersymmetric flavour and CP problems, while an accidental R-symmetry protects the gaugino mass. The resulting low-energy sparticle spectrum consists of stops, gauginos and Higgsinos which are sufficient to stabilize the little hierarchy between the IR scale and the electroweak scale. Finally, the supersymmetric little hierarchy problem is ameliorated by introducing a singlet Higgs field on the IR brane.