Conjecture: the Higgs boson is composite

Investigate the conjecture that the Higgs boson is a composite particle rather than an elementary scalar, and determine whether experimental data can confirm or exclude compositeness as an explanation for the stability of the Higgs mass against large radiative corrections.

Background

Addressing the hierarchy problem, the text surveys proposals to protect the Higgs mass from large quantum corrections. Among these, compositeness of the Higgs is highlighted as a conjectured alternative to supersymmetry.

Although the statement notes current data do not support a composite Higgs, it remains a conjecture that motivates targeted experimental tests at future colliders.

References

One conjecture is that the Higgs boson is a composite object, but the current data does not support this.

— Motivation and design of a yotta-eV $τ^+τ^-$ collider  (2604.00440 - Bellis et al., 1 Apr 2026) in Section 2: Scientific motivation

We do not explicitly know the specific form of strong dynamics needed for a fully realistic model along the lines hypothesized in this paper.

— The Super-Composite Higgs  (2609.26413 - Agashe et al., 22 Sep 2026) in Section 1, Introduction

An important open question is to see how an extended Higgs sector modifies the upper bound on $m_*$ from unitarity and how this affects the prediction on the electron EDM.

— The Super-Composite Higgs  (2609.26413 - Agashe et al., 22 Sep 2026) in Section 9.2, subsection “Extended Higgs sectors”