Natural SUSY from SU(5) Orbifold GUT

TL;DR

This paper presents a 5D orbifold GUT model that naturally realizes radiative natural supersymmetry, successfully explaining the Higgs mass and electroweak symmetry breaking with minimal parameters, while addressing dark matter composition.

Contribution

It introduces a novel 5D orbifold GUT framework that naturally incorporates radiative natural supersymmetry and provides mechanisms for realistic Higgs mass and electroweak symmetry breaking.

Findings

Model achieves 125 GeV Higgs with large stop masses.

Radiative natural supersymmetry is compatible with current constraints.

Additional dark matter components are needed for relic density.

Abstract

We propose a realistic 5D orbifold GUT model that can reduce to natural (or radiative natural) supersymmetry as the low energy effective theory. Supersymmetry as well as gauge symmetry are broken by the twist boundary conditions. We find that it is non-trivial to introduce other flavor symmetry other than the $SU(2)_R$ R-symmetry. We ameliorate the tension between the small number of free parameters and the successful electroweak symmetry breaking by introducing non-minimal Kahler potentials. A large trilinear term $A_t$, which is necessary to give a 125 GeV Higgs boson, is naturally provided in our scenario. A scan under current experimental constraints shows that our model can realize natural (or radiative natural) supersymmetry. Only radiative natural supersymmetry can naturally lead to 125 GeV higgs. Additional dark matter species other than neutralino(like axion) are needed to provide enough relic density. Relatively large stop masses are necessary to give realistic higg mass in most of the parameter spaces.