Charged Higgs observability via charged Higgs pair production at future lepton collider

The observability of charged Higgs bosons H-+/- has been investigated at future lepton collider in type I two-Higgs-doublet model (2HDM) at the center of mass energy root s = 1.5 TeV. The signal process chain is e(+)e(-) -> Z*/gamma* -> H+H- -> HW+HW- -> b (b) over bar jjb (b) over bar jj. The process proceeds through virtual gamma and Z boson exchange in the s channel. Several benchmark points are selected, and events are analyzed to reconstruct the mass of charged Higgs bosons H-+/-. The value of tan beta is kept relatively high to enhance the branching ratio of H -> b (b) over bar to benefit the signal processes. The main standard model (SM) background process produced is t (t) over bar. Signal selection and significance efficiencies are calculated at integrated luminosities of 100 fb(-1), 500 fb(-1), 1000 fb(-1) , and 5000 fb(-1). The reconstructed and corrected mass of charged Higgs bosons H-+/- is determined. Analyzing the results demonstrates that charged Higgs bosons can be discovered through the pair production process via its bosonic decays. This study is supposed to provide the experimentalists with a good way to examine the Higgs bosons beyond SM and to check the validity of 2HDM models in considered parameter space.

Automated summary

The observability of charged Higgs bosons in the I type 2HDM model has been investigated at a future lepton collider. Events are analyzed to reconstruct the mass of the charged Higgs bosons, and signal selection and significance efficiencies are calculated. The results show that charged Higgs bosons can be discovered through the bosonic decay process.