Charged-Higgs production in the Two-Higgs-doublet model — the τ ν channel

We update the allowed parameter space of the CP-violating 2HDM with Type II Yukawa couplings, that survives the current experimental and theoretical constraints on the model. For a representative set of allowed parameter points, we study the production of charged Higgs bosons, both at the LHC at 14 TeV and at a possible future hadronic collider at 30 TeV. Two classes of production mechanisms are considered, “bosonic” (pp → H±W∓X) and “fermionic” (pp → H+t(b)X). After commenting on our previous H±→ W±H1 investigation, we focus on the tauonic decay mode, H±→ τ ν, performing a detailed signal-over-background analysis at the parton level. The increased features provided when considering CP violation, i.e., the extension of the parameter space and the mixing of the would-be CP-odd scalar boson, only marginally increase the discovery prospects, which remain very challenging both when increased luminosities and higher energies are considered.