Speaker
Description
A precise determination of the Higgs self-coupling represents a cornerstone of the physics program of future colliders because it gives important insights into the shape of the Higgs potential and thus into the evolution of the early universe. This contribution will present an update of the analysis of di-Higgs production in $e^+e^-$ collisions at \mbox{500 GeV} using detailed simulations of the ILD detector concept, incorporating advancements through state-of-the-art particle ID, flavor tagging and ML-driven event selection. In particular, we will apply these tools to the $HH \rightarrow b\bar{b}b\bar{b}$ and $Z \rightarrow q\bar{q}$/$e^+$$e^-$/$\mu^+$$\mu^-$/$\bar{\nu}\nu$ channels. Based on the experience of previous analyzes, we extrapolate these to cover the contributions of other decay modes and from the $W^+W^-$ fusion production mode. We study the dependency of the results on the center-of-mass energy as well as on the value of the trilinear coupling realized in nature.
