Lepton-Specific Two-Higgs Doublet Model: Experimental Constraints and Implication on Higgs Phenomenology

Abstract

We examine various direct and indirect constraints on the lepton-specific two-Higgs doublet model and scrutinize the property of the Higgs bosons in the allowed parameter space. These constraints come from the precision electroweak data, the direct search for Higgs boson, the muon anomalous magnetic moment, as well as some theoretical consistency requirements. We find that in the allowed parameter space the CP-odd Higgs boson A is rather light (m_A < 30 GeV with 95% possibility), which is composed dominantly by the leptonic Higgs and decays dominantly into τ^+ τ^-; while the SM-like Higgs boson h (responsible largely for electroweak symmetry breaking) decays dominantly in the mode h->A A->4 τwith a large decay width, which will make the Higgs discovery more difficult at the LHC. Whereas, this scenario predicts a branching ratio Br(Z->τ^+ τ^- A) ranging from 10^{-5} to 10^{-4}, which may be accessible at the the GigaZ option of the ILC.

13 pages, 4 figs, to appear in PRD (Rapid Communication)

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• Science Case for the new High-Intensity Muon Beams HIMB at PSI
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• Muon g-2 and a type-X two Higgs doublet scenario: some studies in high-scale validity
• Leptophilic bosons and muon g-2 at lepton colliders
• Searching for a Light Higgs Boson via the Yukawa Process at Lepton Colliders
• Masses of physical scalars in two Higgs doublet models
• Alignment, reverse alignment, and wrong sign Yukawa couplings in two Higgs doublet models
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• Dark matter and Higgs phenomenology predicted by left-right twin Higgs model in light of CDMS II results
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• Muon g-2 and galactic centre $\gamma$-ray excess in a scalar extension of the 2HDM type-X
• The Supersymmetric Leptophilic Higgs Model
• Leptophilic-portal Dark Matter in the Light of AMS-02 positron excess
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• Quasi-Dirac neutrinos in a model with local $B-L$ symmetry
• muon $g-2$ anomaly and $\mu$-$\tau$-philic Higgs doublet with a light CP-even component
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• Investigation of $(g-2{)}_{\mu }$ anomaly in the $\mu$-specific 2HDM with Vector like leptons and the phenomenological implications
• Current Status of the Muon g-2 Interpretations within Two-Higgs-Doublet Models
• Muon Electric Dipole Moment as a Probe of Flavor-Diagonal CP Violation
• Phenomenology of Higgs bosons in inverse seesaw model with Type-X two Higgs doublet at the LHC
• Dark Matter in Leptophilic Higgs Models After the LHC Run-I
• Muon g$-$2 in two-Higgs-doublet models
• Exploring Wrong Sign Scenarios in the Yukawa-Aligned 2HDM
• Is Higgsium a possibility in 2HDMs?
• Muon $g-2$ in a 2HDM assisted by inert scalars: probing at the ILC
• Decays $A\to Z\gamma \gamma$ and $\varphi \to Z\gamma \gamma$ ($\varphi =h,H$) in two-Higgs doublet models
• Unitarity bounds on extensions of Higgs sector
• Fermion masses and mixings and $g-2$ muon anomaly in a $Q_6$ flavored 2HDM
• Searching for a Light (pseudo)Scalar via the Yukawa Process at the ILC
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