We study the phenomenology of the charged Higgs boson in the flipped two-Higgs-doublet model, in which one doublet gives mass to up-type quarks and charged leptons, and the other gives mass to down-type quarks. We present the charged Higgs branching ratios and summarize the indirect constraints. We extrapolate existing LEP searches for $H^{+}{H}^{-}$ and Tevatron searches for $t\overline{t}$ with $t\to H^{+}b$ into the flipped model and extract constraints on $M_{H^{+}}$ and the parameter $\tan \beta$. We finish by reviewing existing LHC charged Higgs searches and suggest that the LHC reach in this model could be extended for charged Higgs masses below the $tb$ threshold by considering $t\overline{t}$ with $t\to H^{+}b$ and $H^{+}\to q{\overline{q}}^{\prime }$, as has been used in Tevatron searches.

• Received 12 March 2010

DOI:https://doi.org/10.1103/PhysRevD.81.075016