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arxiv: 1510.04028 · v3 · submitted 2015-10-14 · ✦ hep-ph

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CP Violating Two-Higgs-Doublet Model: Constraints and LHC Predictions

Venus Keus , Stephen F. King , Stefano Moretti , Kei Yagyu
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classification ✦ hep-ph
keywords higgsmodelconstraintsmodelsneutralpredictionstwo-higgs-doubletallow
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Two-Higgs-Doublet Models (2HDMs) are amongst the simplest extensions of the Standard Model. Such models allow for tree-level CP Violation (CPV) in the Higgs sector. We analyse a class of CPV 2HDM (of Type-I) in which only one of the two Higgs doublets couples to quarks and leptons, avoiding dangerous Flavour Changing Neutral Currents. We provide an up to date and comprehensive analysis of the constraints and Large Hadron Collider (LHC) predictions of such a model. Of immediate interest to the LHC Run 2 is the golden channel where all three neutral Higgs bosons are observed to decay into gauge boson pairs, $WW$ and $ZZ$, providing a smoking gun signature of the CPV 2HDM.

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  1. Model-independent probes of CP violation in the heavy scalar sector at muon colliders

    hep-ph 2025-11 unverdicted novelty 5.0

    Observing vector boson fusion production of a heavy scalar followed by decay to Z h1 at muon colliders can establish CP violation in the scalar sector because it requires both h2VV and h2h1Z couplings to be nonzero.