Charged Higgs boson phenomenology in the dark $\textit{Z}$ mediated fermionic dark matter model
Kyu Bae (Department of Physics, Kyungpook National University, Daegu, 41566, Korea)
; Jinn-Ouk Gong (Asia Pacific Center for Theoretical Physics, Pohang, 37673, Korea, Department of Science Education, Ewha Womans University, Seoul, 03760, Korea)
; Dong-Won Jung (Cosmology, Gravity and Astroparticle Physics Group, Center for Theoretical Physics of the Universe, Institute for Basic Science, Daejeon, 34126, Korea)
; Kang Lee (Department of Physics Education & RINS, Gyeongsang National University, Jinju, 52828, Korea)
; Chaehyun Yu (Department of Physics Education & RINS, Gyeongsang National University, Jinju, 52828, Korea)
; et al - Show all 6 authors
We present the phenomenology of the charged Higgs boson $\textit{H}$ appearing in a fermionic dark matter model mediated by an additional scalar doublet. In order to couple the dark matter fermion to the scalar doublet, we introduce a U(1) gauge symmetry, which is spontaneously broken at electroweak symmetry breaking, resulting in a massive $\textit{Z′}$ gauge boson. Since $\textit{Z′}$ is generically light, the model is subject to strong constraints from electroweak precision observables. As a result, the charged Higgs boson mass allowed by current experimental bounds is typically light in this model, 110 GeV $\textit{