Light Higgs bosons in Two-Higgs-Doublet Models

Abstract

We explore the possibilities in two-Higgs-doublet models (2HDMs) of Type I and Type II for Higgs states with mass below about 60 GeV, i.e. less than half of the ~125 GeV mass of the observed SM-like Higgs boson. We identify the latter as either the lighter or the heavier CP-even state, h or H, and employ scans of the 2HDM parameter space taking into account all relevant theoretical and experimental constraints, including the most up-to-date Higgs signal strength measurements. We find that, in both Type I and Type II models, such light Higgs states are phenomenologically viable and can lead to interesting signatures. Part of the relevant parameter space may be testable with the existing 8 TeV LHC data, e.g. by looking for direct production of the light state via gg-fusion or bb-associated-production using its τ^+ τ^- and μ^+ μ^- decays at low invariant mass.

19 pages, 15 figures, references and a short comment added

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Cited by in corpus (11)

• A light pseudoscalar of 2HDM confronted with muon g-2 and experimental constraints
• The Higgs Vacuum Uplifted: Revisiting the Electroweak Phase Transition with a Second Higgs Doublet
• Next-to-leading order unitarity fits in Two-Higgs-Doublet models with soft ${\mathbb{Z}}_2$ breaking
• Search for a light pseudoscalar Higgs boson in the boosted $\mu \mu \tau \tau$ final state in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Probing extended Higgs sectors by the synergy between direct searches at the LHC and precision tests at future lepton colliders
• Two-loop corrections to the $\rho$ parameter in Two-Higgs-Doublet Models
• Search for a light pseudoscalar Higgs boson produced in association with bottom quarks in pp collisions at sqrt(s) = 8 TeV
• Search for a low-mass ${\tau }^{-}{\tau }^{+}$ resonance in association with a bottom quark in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Disfavouring Electroweak Baryogenesis and a hidden Higgs in a CP-violating Two-Higgs-Doublet Model
• Testing CP-Violation in the Scalar Sector at Future $e^{+}{e}^{-}$ Colliders
• Genuine NMSSM deviations in the 125 GeV Higgs boson decays