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arXiv · 2606.14303

Testing varying coupling constants through multi-Higgs production at the LHC

Ulf Danielsson·Rikard Enberg·Gunnar Ingelman·Soumyadip Kundu·Tanumoy Mandal·Subhadip Mitra
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Abstract

We propose the One Scalar Theory (1ST), a minimalist framework where a single real singlet scalar field mediates the dynamical generation of the Higgs self-coupling and the top Yukawa coupling. Unlike generic portal models, the 1ST removes parametric freedom by locking production and decay modes to a single fundamental scale $\Lambda_0$, rendering the framework highly predictive with unique experimental signals. We demonstrate that the collider phenomenology is partitioned by the $2m_t$ kinematic threshold into di-Higgs and di-top resonance regimes. By recasting current ATLAS data, we set lower bounds on $\Lambda_0$ at the TeV scale and show that the High-Luminosity LHC will probe this scale up to $4$ TeV, providing a definitive test for the dynamical origin of the electroweak sector.

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Ulf Danielsson, Rikard Enberg, Gunnar Ingelman, Soumyadip Kundu, Tanumoy Mandal, Subhadip Mitra. 2026-06-12. Testing varying coupling constants through multi-Higgs production at the LHC. https://arxiv.org/abs/2606.14303

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