Multi-Scalar production at hadron colliders

The Higgs boson is the first fundamental scalar to be discovered. A crucial task following this discovery is to directly measure its couplings to the Standard Model content. These include the self-couplings, that can be probed via production of multiple Higgs bosons at hadron colliders. I will be discussing recent phenomenological advancements in this direction, focussing on Higgs boson pair and triple production at the Large Hadron Collider and a Future Circular Collider. Additional new scalar resonances may appear in collider experiments. In that case, it is conceivable that such resonances will interact with the Standard Model-like Higgs boson. The nature of their interactions can be investigated via associated production with a Higgs boson, for which I will be focussing on a simple scenario.