Abstract
In this work we compare the current experimental LHC limits of the 2HDM + scalar and pseudoscalar for the toverline{t} , mono-Z and mono-h signatures and forecast the reach of future LHC upgrades for the mono-Z channel. Furthermore, we comment on the possibility, in case of a signal detection, to discriminate between the two models. The 2HDM+S and 2HDM+PS are two notable examples of the so-called next generation of Dark Matter Simplified Models. They allow for a renormalizable coupling of fermionic, Standard Model singlet, Dark Matter with a two Higgs doublet sector, through the mixing of the latter with a scalar or pseudoscalar singlet.
Highlights
The so-called simplified models were born to satisfy this need
For a better overview we briefly summarize our choice of parameter values, which are motivated by various constraints discussed above and used for the following Monte Carlo simulations and other examples throughout the paper: MA = MH± = MH/S1 λ3 = Mh2/v2
We use the model-independent upper limits on the h + E/ T cross section provided by ATLAS [79] and compare it to the one we find from our simulation, as done by the LHC-DMWG
Summary
Where V2hdm is the standard 2HDM potential, VS is the potential of the scalar singlet and VS2hdm is the potential involving interaction terms between the scalar singlet and the doublets. In [7], the authors write the potential directly in the Higgs basis as This time, on top of the SM Goldstone bosons G and the charged scalar H±, there is a single CP-odd scalar, A, and three CP-even scalars, ρ1,2,3, that mix together, and are linear combinations of h and S1,2, which are two new CP-even scalar particles. Note that, in this potential written in the Higgs base, the terms λ6,7 are absent, contrary to the pseudoscalar case, where changing to the Higgs base switches these terms on, in general
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