Observability of 2HDM neutral Higgs bosons in fully hadronic decay at future linear collider

The study aims to investigate the observability of pseudoscalar Higgs boson A and neutral heavy CP even Higgs boson H , at different benchmark points, in the framework of type-I 2HDM. The study is done for e - e + collisions at s = 1000 GeV center of mass energy (c.m.s.), a possible scenario in future lepton collider. The associated production of A and H in e + e - collisions are investigated in a fully hadronic final state in two different channels. The first one is AH → ZHH → j j ¯ b b ¯ b b ¯ , while the other one is AH → b b ¯ b b ¯ . The observability of neutral heavy Higgs and pseudoscalar Higgs signal is possible within the parameter space ( tan β , m A ) which satisfies all experimental and theoretical constraints. The CP odd and CP even Higgs bosons in all scenarios are observable when the signal exceeds 5 σ , which is the final extracted value of signal significance. The signal significance is calculated at different integrated luminosities. It is concluded from the current analysis that a fully hadronic channel is promising for search and measurement of the neutral Higgs bosons in 2HDM.