Speaker
Description
Investigating the trilinear Higgs coupling $\lambda_{hhh}$ is crucial to determine the structure of the Higgs potential and to probe possible signs of physics beyond the Standard Model (SM). Focusing on the Two-Higgs-Doublet Model as a concrete example, I will discuss the calculation of the dominant two-loop contributions to $\lambda_{hhh}$, and I will show that this coupling can, in certain regions of parameter space, be significantly enhanced with respect to its SM prediction. Taking into account all relevant corrections up to the two-loop level, I will demonstrate that the current experimental bounds on $\lambda_{hhh}$ already rule out significant parts of otherwise unconstrained parameter space of the model. Finally, I will present a benchmark scenario illustrating the interpretation of the current results and future measurement prospects on $\lambda_{hhh}$.
