https://phys.org/news/2018-06-higgs-boson-quarks-linked-milestone.html

The measurements from the CMS team and another collaboration known as ATLAS indicate the Higgs boson has a critical role in the large value of the top quark mass. While this is certainly a key feature of the Standard Model – the overarching theory in physics that describes the basic components of matter and the forces that govern their interactions – this is the first time it has been verified experimentally with what one spokesman called "overwhelming significance."

In the Standard Model, the Higgs boson can couple to particles called fermions. Electrons and protons that make regular atoms are examples of fermions. The heaviest known fermion is the top quark. Generally, scientists can measure the coupling strength of the Higgs boson to fermions by measuring the decay rate of the Higgs boson to other lighter particles. But because the Higgs boson cannot decay into a pair of top quarks, the only way to measure this coupling is to study the production of a Higgs boson in associations with top quarks.