The 2023 International Workshop on the High Energy Circular Electron Positron Collider

We compute the complete two-loop electroweak corrections to the Higgsstralung process $e^{+}e^{-}\to HZ$ at the future Higgs factory. The Feynman integrals involved in the computation are decomposed into linear combinations of a minimal set of master integrals taking advantage of the recent developments of integral reduction techniques. The master integrals are then evaluated by differential...

We present a comprehensive analysis of the Two Higgs Doublet Model with a Singlet (2HDM+S) at future $e^{+} e^{-}$ collider. We perform extensive parameter scans considering the $\chi^2$ analysis within the 2HDM+S framework, exploring a range of model-independent parameters to identify regions that could provide improved branching, for channels, $S \rightarrow \gamma \gamma$, $S \rightarrow...