Multi-boson splashes at future colliders from electroweak compositeness

TL;DR

This paper proposes a new collider signature involving multiple electroweak bosons as evidence for the composite nature of the Higgs sector, which can be tested at future high-energy colliders like FCC-hh and a muon collider.

Contribution

It introduces a novel collider signature involving multi-boson production from hyper-quark hadronization as a probe of electroweak compositeness.

Findings

Multi-boson signatures can be observed at future colliders.

Probing hyper-quark hadronization provides evidence for Higgs compositeness.

Future colliders can distinguish composite Higgs models from the Standard Model.

Abstract

We propose a new collider signature for the composite origin of the electroweak symmetry breaking of the standard model. The Higgs sector consists of new fundamental fermions (hyper-quarks), which confine at a hadronization scale $\Lambda_{HC} \sim$ few TeV. At energies above $\Lambda_{HC}$, the Drell-Yan production of the hyper-quarks leads to the production of a few electroweak bosons, in analogy with hadron production in QCD at $e^+e^- \to q\bar{q}$ around a few GeV. We show that this regime can be probed at future colliders, namely the proposed 100 TeV hadron collider (FCC-hh) and a 10 TeV muon collider. Together with the direct discovery of electroweak resonances, the multi electroweak boson signature provides a smoking gun for Higgs compositeness.