A three Higgs doublet model with symmetry-suppressed flavour changing neutral currents

TL;DR

This paper proposes a three-Higgs doublet model with specific symmetries that suppress flavor-changing neutral currents, allowing for new scalars below TeV scale compatible with flavor constraints, and encouraging future collider searches.

Contribution

It introduces a novel three-Higgs doublet model with a unique symmetry structure that suppresses flavor-changing neutral currents while remaining testable at collider experiments.

Findings

New scalars below TeV scale compatible with flavor data

Suppressed flavor-changing neutral currents due to symmetry

Encourages future collider searches for extra Higgs bosons

Abstract

We construct a three-Higgs doublet model with a flavour non-universal ${\rm U}(1)\times \mathbb{Z}_2$ symmetry. That symmetry induces suppressed flavour-changing interactions mediated by neutral scalars. New scalars with masses below the TeV scale can still successfully negotiate the constraints arising from flavour data. Such a model can thus encourage direct searches for extra Higgs bosons in the future collider experiments, and includes a non-trivial flavour structure.