Abstract
Phys. Rev. D 92, 075024 (2015) We examine the leptophilic two Higgs doublet model with fermionic dark
matter, considering the range of experimental constraints on the Higgs sector.
The measurements of the 125 GeV Higgs from the LHC Run-I allow us to focus on
those remaining processes that may play an important role at colliders. We find
that the leptophilic model allows for a much lighter Higgs than in other
two-Higgs models, although discovery at the LHC will be difficult. Adding a
dark matter sector motivated by supersymmetric extensions of the leptophilic
model, we find the existing parameter space can accommodate constraints from
direct detection and the invisible widths of the Higgs and $Z$, while also
fitting the Galactic Center gamma ray excess reported by analyses of Fermi-LAT
data. We also discuss the status of the fully supersymmetric version of such
models, which include four Higgs doublets and a natural dark matter candidate.