“Harnessing Higgs Kinematics for HEFT Constraints” explores how future Large Hadron Collider (LHC) data can reveal subtle signs of new physics in Higgs boson pair production. We employ a theoretical framework called the Higgs Effective Field Theory (HEFT), which allows for more flexible and momentum-sensitive modifications to Higgs interactions than the more standard Standard Model-based approaches. We develop a method to adjust existing simulations using “reweighting” techniques to account for these effects without needing to regenerate data. Focusing on specific HEFT operators, we show that some can dramatically alter the energy distribution of the Higgs bosons, especially in events where the Higgs pair are produced at large momentum transfers. By analysing simulated data and projecting to future LHC runs, we show that these effects can be probed with high precision. Furthermore, including data from rare processes, like four-top-quark production, that will become increasingly accessible with the next LHC runs, we can resolve ambiguities and significantly tighten the constraints on possible new Higgs interactions. (Read more)