Large pseudoscalar Yukawa couplings in the complex 2HDM

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 $300f{b}^{-1}$ and $3000f{b}^{-1}$ 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 ${\varphi }_{\tau }$, between the scalar and pseudoscalar component of the 125 GeV Higgs, in the decay $h\to {\tau }^{+}{\tau }^{-}$ will be able to probe many of these scenarios, even with low luminosity. Similarly, a measurement of ${\varphi }_t$ in the vertex $\bar{t}th$ could help to constrain the low $\tan \beta$ region in the Type I model.

21 pages, 10 figures

Cited by in corpus (4)

• The CP-Violating 2HDM in Light of a Strong First Order Electroweak Phase Transition and Implications for Higgs Pair Production
• Tree-level metastability bounds for the most general two Higgs doublet model
• Angular distributions in $t\bar{t}H(H\to b\bar{b})$ reconstructed events at the LHC
• The Role of the $t\bar{t}h$ Rest Frame in Direct Top-Quark Yukawa Coupling Measurements