Constraints on light scalars in the Aligned-two-Higgs-doublet model
Abstract
In this work, we explore the viability of light-scalar scenarios within the -conserving, flavour-aligned two-Higgs-doublet model (A2HDM), where at least one additional neutral or charged scalar is assumed to be lighter than the 125 GeV Higgs boson. The A2HDM naturally avoids flavour-changing neutral currents via Yukawa alignment, providing a more flexible framework than conventional -symmetric models. Employing the package within a Bayesian statistical approach, we perform global fits across all distinct light-scalar configurations, incorporating theoretical requirements and experimental constraints from electroweak precision observables, flavour data, Higgs measurements, and direct searches at the LEP and the LHC.
Keywords
Cite
@article{arxiv.2505.08649,
title = {Constraints on light scalars in the Aligned-two-Higgs-doublet model},
author = {V. Miralles and A. M. Coutinho and A. Karan and A. Pich},
journal= {arXiv preprint arXiv:2505.08649},
year = {2025}
}
Comments
Contribution to the 2025 Electroweak session of the 59th Rencontres de Moriond