Holographic model for the first order phase transition in the composite Higgs boson scenario

TL;DR

This paper introduces a holographic model where a first order phase transition in a composite Higgs scenario could produce detectable gravitational waves, linking particle physics and cosmology.

Contribution

It develops a soft-wall holographic model for the composite Higgs that exhibits a first order phase transition, enabling bubble nucleation analysis.

Findings

First order phase transition facilitates bubble nucleation in the early universe.

Estimated gravitational wave spectrum is within detection range of planned detectors.

Provides a new holographic framework connecting strongly coupled sectors and cosmological signals.

Abstract

The composite Higgs model assumes that the Higgs field arises as the pseudo-Goldstone mode corresponding to a dynamical symmetry breaking in a new strongly coupled sector. We present a soft-wall holographic model where such symmetry breaking occurs as a first order phase transition. In this case the bubble nucleation in the early universe becomes possible. To study the homogeneous solutions in the models of this type we present the perturbation theory approach. We estimate the gravitational wave spectrum produced during the nucleation phase and find it to be detectable with the planned gravitational wave detectors.