Induced Electroweak Symmetry Breaking and Supersymmetric Naturalness

TL;DR

This paper introduces a new class of supersymmetric models with auxiliary Higgs fields that naturally explain a 125 GeV Higgs without fine-tuning, maintaining gauge unification and consistent with experimental data.

Contribution

The paper proposes perturbative supersymmetric models with auxiliary Higgs fields that induce electroweak symmetry breaking, reducing fine-tuning and predicting new Higgs states.

Findings

Models are consistent with the 125 GeV Higgs properties.

Less than 10% tuning in allowed parameter space.

Predicts new Higgs states at the weak scale.

Abstract

In this paper we study a new class of supersymmetric models that can explain a 125 GeV Higgs without fine-tuning. These models contain additional `auxiliary Higgs' fields with large tree-level quartic interaction terms but no Yukawa couplings. These have electroweak-breaking vacuum expectation values, and contribute to the VEVs of the MSSM Higgs fields either through an induced quartic or through an induced tadpole. The quartic interactions for the auxiliary Higgs fields can arise from either D-terms or F-terms. The tadpole mechanism has been previously studied in strongly-coupled models with large D-terms, referred to as `superconformal technicolor.' The perturbative models studied here preserve gauge coupling unification in the simplest possible way, namely that all new fields are in complete SU(5) multiplets. The models are consistent with the observed properties of the 125 GeV Higgs-like boson as well as precision electroweak constraints, and predict a rich phenomenology of new Higgs states at the weak scale. The tuning is less than 10% in almost all of the phenomenologically allowed parameter space. If electroweak symmetry is broken by an induced tadpole, the cubic and quartic Higgs self-couplings are significantly smaller than in the standard model.