Uncovering new strong dynamics via topological interactions at the 100 TeV collider

In models of composite Higgs dynamics, new composite pseudoscalars can interact with the Higgs and electroweak gauge bosons via anomalous interactions, stemming from the topological sector of the underlying theory. We show that a future 100 TeV proton-proton collider (FCC-pp) will be able to test this important sector and thus shed light on the strong dynamics which generates the Higgs and other composite states. To elucidate our results, we focus on the topological interactions of a minimal composite Higgs model with a fermionic ultraviolet completion, based on the coset SU(4)/Sp(4). We suggest the strategy to test these interactions at the FCC-pp and analyze the expected reach.