Double Higgs boson production at $e^{+}{e}^{-}$ colliders in the two-Higgs-doublet model

Tadashi Kon, Takuto Nagura, Takahiro Ueda +1

We study the double Higgs boson production processes $e^{+}{e}^{-}\to hhf\bar{f}$ ($f\ne t$) with $h$ being the 125 GeV Higgs boson in the two-Higgs-doublet model with a softly-broken…