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arXiv · 1502.01720

Large pseudoscalar Yukawa couplings in the complex 2HDM

Duarte Fontes·Jorge C. Romão·Rui Santos·João P. Silva
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Abstract

We start by presenting the current status of a complex flavour conserving two-Higgs doublet model. We will focus on some very interesting scenarios where unexpectedly the light Higgs couplings to leptons and to b-quarks can have a large pseudoscalar component with a vanishing scalar component. Predictions for the allowed parameter space at end of the next run with a total collected luminosity of $300 \, fb^{-1}$ and $3000 \, fb^{-1}$ are also discussed. These scenarios are not excluded by present data and most probably will survive the next LHC run. However, a measurement of the mixing angle $ϕ_τ$, between the scalar and pseudoscalar component of the 125 GeV Higgs, in the decay $h \to τ^+ τ^-$ will be able to probe many of these scenarios, even with low luminosity. Similarly, a measurement of $ϕ_t$ in the vertex $\bar t t h$ could help to constrain the low $\tan β$ region in the Type I model.

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Duarte Fontes, Jorge C. Romão, Rui Santos, João P. Silva. 2015-03-04. Large pseudoscalar Yukawa couplings in the complex 2HDM. https://arxiv.org/abs/1502.01720

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