The Large Hadron Collider (LHC) is probing physics in a new kinematic region, at energies around and above the electroweak symmetry-breaking scale. With the discovery of the Higgs boson [3][28], the first data-taking period of the LHC experiments demonstrated that the understanding of electroweak symmetry-breaking within the Standard Model (SM) is broadly correct, and thus that the theory is potentially valid well above the TeV scale. Many precision measurements of hadronic jets, charged leptons, and other final states have been published, reaching into this new kinematic domain.

The predictions of the SM are generally in agreement with the data, while the many dedicated searches for physics beyond the SM have excluded a wide range of possible scenarios. Nevertheless, there are many reasons to be confident that physics beyond the Standard Model (BSM) exists; examples include the gravitational evidence for dark matter, the large preponderance of matter over antimatter in the universe, and the existence of gravity itself. None of these can be easily accommodated within known Standard Model phenomenology.

This motivates a continued campaign to make precise measurements and calculations at higher energies and luminosities, and to exploit these to narrow down the class of viable models of new physics, hopefully shedding light on the correct new theory, or at least on the energy scale at which new physics might be observed at future experiments. Whether physics beyond the Standard Model is discovered or not, there is a need to extract the clearest and most generic information about physics in this new energy regime, an imperative which will grow with integrated luminosity.