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2HDM Neutral Scalars under the LHC

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arxiv 2004.04172 v3 pith:FXTP6H3J submitted 2020-04-08 hep-ph hep-ex

Felix Kling , Shufang Su , Wei Su This is my paper · ORCID
classification hep-phhep-ex
keywords higgsdirectsearcheschannelsconstraintsmeasurementsmodelsneutral
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

Two Higgs Doublet Models (2HDM) provide a simple framework for new physics models with an extended Higgs sector. The current LHC results, including both direct searches for additional non-Standard Model (SM) Higgs bosons, as well as precision measurements of the SM-like Higgs couplings, already provide strong constraints on the 2HDM parameter spaces. In this paper, we examine those constraints for the neutral scalars in the Type-I and Type-II 2HDM. In addition to the direct search channels with SM final states: $H/A \to f\bar f, VV, Vh, hh$, we study in particular the exotic decay channels of $H/A \to AZ/HZ$ once there is a mass hierarchy between the non-SM Higgses. We found that $H/A \to AZ/HZ$ channel has unique sensitivity to the alignment limit region which remains unconstrained by conventional searches and Higgs precision measurements. This mode also extends the reach at intermediate $\tan\beta$ for heavy $m_A$ that are not covered by the other direct searches.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Correlating Resonant Di-Higgs and Tri-Higgs Production to $H\to VV$ in the 2HDM

    hep-ph 2025-12 conditional novelty 6.0 of 10

    In the decoupling limit of the 2HDM, a heavy Higgs boson's decays to two Higgs bosons and to Z/W pairs are predicted to have a fixed ratio of about 9.5, independent of Yukawa and scalar-potential parameters.

  2. Searching for charged Higgs bosons via $e^+ e^- \to H^\pm W^\mp S$ at the ILC

    hep-ph 2025-06 conditional novelty 6.0 of 10

    A detector-level Monte Carlo study shows that e+e- -> H± W∓ S in the type-X 2HDM could be discovered at the ILC with 500 GeV and 500 fb^-1.

  3. Charged Higgs Search in 2HDM

    hep-ph 2024-12 accept novelty 5.0 of 10

    Updated LHC and LEP constraints on charged Higgses show that H+ to A W and H+ to H W decay channels are complementary to fermionic channels and extend the search reach in the Type-L 2HDM.

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