LHC constraints on two-Higgs doublet models

TL;DR

This paper examines how recent LHC data on a 126 GeV Higgs-like boson constrains two-Higgs doublet models, analyzing both CP-violating and CP-conserving scenarios within the Aligned Two-Higgs Doublet Model framework.

Contribution

It provides a comprehensive analysis of LHC constraints on the scalar spectrum of two-Higgs doublet models without flavor-changing neutral currents, including specific model limits.

Findings

LHC data restricts the parameter space of two-Higgs doublet models.

Certain CP-violating scenarios are favored or disfavored by the data.

The analysis identifies viable scalar spectra consistent with observations.

Abstract

A new Higgs-like boson with mass around 126 GeV has recently been discovered at the LHC. The available data on this new particle is analyzed within the context of two-Higgs doublet models without tree-level flavour-changing neutral currents. Keeping the generic Yukawa structure of the Aligned Two-Higgs Doublet Model framework, we study the implications of the LHC data on the allowed scalar spectrum. We analyze both the CP-violating and CP-conserving cases, and a few particular limits with a reduced number of free parameters, such as the usual models based on discrete ${\cal Z}_2$ symmetries.