In the soft-wall holographic composite Higgs model, the symmetry breaking transition is strongly first order with alpha up to 10^3 and beta/H between 10^5 and 5x10^6, producing gravitational waves peaked near the BBO/DECIGO band.
Holographic model for the first order phase transition in the composite Higgs boson scenario
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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.
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Holographic composite Higgs model and gravitational waves produced during first order phase transition
In the soft-wall holographic composite Higgs model, the symmetry breaking transition is strongly first order with alpha up to 10^3 and beta/H between 10^5 and 5x10^6, producing gravitational waves peaked near the BBO/DECIGO band.