Parameter dependence and analysis of the 2HDM neutral Higgs boson pair production and decay at future lepton colliders

In this work, we present a study of the neutral Higgs bosons in two doublet model (2HDM) terms their production processes and decay channels as function parameters. The analysis is performed for all four types 2HDM most promising are identified each type model. Several boson mass scenarios below above threshold to gauge pair introduced corresponding categories final states analyzed. event including collider beam spectrum detector simulation shows that future lepton colliders have potential explore regions parameter space, which not yet been excluded by LHC, few weeks operation. Final results presented signal distributions on top background 95% CL exclusion 5σ contours based center energy s=500 GeV at Compact Linear Collider (CLIC) or International (ILC).