Date Dec 14, 2020, 2:30 pm – 2:30 pm Location via Zoom Share on X Share on Facebook Share on LinkedIn Speaker Simon Caron-Huot Affiliation McGill University Presentation "Causality and Effective Field Theories" Details Event Description To connect to the HET Seminar via Zoom, please click the following link:https://theias.zoom.us/j/92467790530?pwd=WUI3U1RCRCtYSjJyV1A2Vmx6dk81QT09Abstract: Dispersion relations are statements of causality. They give sum rules connecting infrared and ultraviolet physics. They are great. While they originate from optics and quantum field theory, in a first part of this talk I will argue that their 'true purpose' is gravity, viewed as a low-energy effective theory. I will present ongoing work mapping out the space of consistent effective theories, including recent results in scalar models deriving a sharp version of dimensional analysis scaling from causality.
