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

Mon, Dec 14, 2020, 2:30 pm
via Zoom

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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.