HET Seminar | Simon Caron-Huot, McGill University | "Causality and Effective Field Theories" | via Zoom

Mon, Dec 14, 2020, 2:30 pm
Location: 
via Zoom
Speaker(s): 

To connect to the HET Seminar via Zoom, please click the following link:

https://theias.zoom.us/j/92467790530?pwd=WUI3U1RCRCtYSjJyV1A2Vmx6dk81QT09

Abstract: 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.