Colloquia Archive 2026

Quantum field theory has proven to be the most powerful and successful tool in physics, yet despite a century of progress many problems remain open. Some of these problems are just coming to light, e.g. non-Fermi liquids, while others have been around a while but are still open, such ...

Energy correlations are infrared-safe observables that measure the flux of energy deposited in calorimeters located at different points on the celestial sphere, thereby encoding detailed information about the dynamics of the underlying theory. Originally introduced to characterize hadronic final states in e^+e^- annihilation, they play a central role in ...