Department Colloquium | Postcards from the Future - Addressing Big Questions at the Energy Frontier

The discovery of the Higgs Boson by the ATLAS and CMS experiments at the Large Hadron Collider (LHC) in Geneva, Switzerland, was one of the most important and exciting moments in particle physics. The field of particle physics has transitioned to a new phase that presents us with a new opportunity to gain a deeper understanding of the fundamental nature of matter and our universe. I will discuss some of the implications, which inform the efforts to figure out the roadmap of particle physics in the coming decades. The Energy Frontier of Particle Physics is at a turning point, in which experimental guidance is needed to shed light on new physics beyond the SM. Several projects have been proposed to provide such guidance. Starting around 2027+, the High-Luminosity LHC (HL-LHC) will deliver proton-proton collisions at a center-of-mass energy of \sqrt{s} = 14 TeV. I will discuss the physics landscape starting with the HL-LHC and going beyond to proposed future machines, such as Higgs factories and multi-TeV colliders.