Emergence of the Electroweak Scale through the Higgs Portal

TL;DR

This paper proposes a model where the electroweak scale emerges through a hidden sector's Coleman-Weinberg mechanism transmitted via the Higgs portal, explaining the smallness of the Higgs mass relative to high energy scales.

Contribution

It introduces a novel scenario where the electroweak scale is generated by a hidden sector's Coleman-Weinberg mechanism transmitted through the Higgs portal, aligning with observed Higgs mass.

Findings

The model naturally explains the small electroweak scale.

Phenomenological analysis compatible with current collider data.

Predictions for future collider and low-energy experiments.

Abstract

Having discovered a candidate for the final piece of the Standard Model, the Higgs boson, the question remains why its vacuum expectation value and its mass are so much smaller than the Planck scale (or any other high scale of new physics). One elegant solution was provided by Coleman and Weinberg, where all mass scales are generated from dimensionless coupling constants via dimensional transmutation. However, the original Coleman-Weinberg scenario predicts a Higgs mass which is too light; it is parametrically suppressed compared to the mass of the vectors bosons, and hence is much lighter than the observed value. In this paper we argue that a mass scale, generated via the Coleman-Weinberg mechanism in a hidden sector and then transmitted to the Standard Model through a Higgs portal, can naturally explain the smallness of the electroweak scale compared to the UV cutoff scale, and at the same time be consistent with the observed value. We analyse the phenomenology of such a model in the context of present and future colliders and low energy measurements.