UV Completed Composite Higgs model with heavy composite partners

TL;DR

This paper explores a minimal composite Higgs model with a fermionic UV completion, showing that heavy composite partners can still enable electroweak symmetry breaking without fine-tuning, and predicts a detectable light Goldstone boson.

Contribution

It demonstrates that the Higgs potential from preon mass can decouple Higgs mass from composite partner masses, allowing heavy partners without fine-tuning, and predicts a light Goldstone boson with LHC phenomenology.

Findings

Heavy composite partners are compatible with electroweak symmetry breaking.

A light singlet Goldstone boson interacts with gauge bosons via Wess-Zumino-Witten terms.

Predicted Goldstone boson can be produced at LHC and constrained by current searches.

Abstract

We study electroweak symmetry breaking in minimal composite Higgs models $SU(4)/Sp(4)$ with purely fermionic UV completions based on a confining Hypercolor gauge group and find that the extra Higgs potential from the underlying preon mass can destruct the correlation between the mass of Higgs and composite partners. Thus the composite partners can be very heavy for successful electroweak symmetry breaking without enhancing the separation between the new physical scale and Higgs VEV. So this kind of model can be easily realized by ordinary strong dynamics theories without artificial assumptions and more likely consistent with lattice simulations. The UV completion of partial compositeness predicts a light singlet Goldstone boson which interacts with QCD and electroweak gauge bosons through Wess-Zumino-Witten terms. It can be produced through gluon fusion at LHC and decay into gauge boson pairs. We briefly discuss its phenomenology and derive its bounds from LHC searches.