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Institute for Particle Physics Phenomenology

Durham University Logo Institute for Particle Physics Phenomenology Logo

Institute for Particle Physics Phenomenology

Seminar Details:

Title:Gravity: The force from the UV
Location:Oxford
Speaker:Caron-Huot, Simon
Organiser:Sarkar, Subir
Date:2021-06-03 15:00:00
Link:www2.physics.ox.ac.uk
  
Join Link:https://zoom.us/j/99110556925
Join Description:Zoom

Seminar Description:

Does our world respect causality at all energy scales? We explore constraints on low-energy dynamics which stem from this assumption. Obstructions to a causal UV completion can be diagnosed using dispersive sum rules, which connect the infrared and ultraviolet. While dispersion relations originate in optics and quantum field theory, I will argue that their true purpose is gravity, where they become particularly powerful due to the maximal growth rate of this force with energy. This leads, technically, to the so-called graviton pole in sum rules. I will briefly review how, for non-gravitational low-energy effective theories, causality turns dimensional analysis estimates into sharp numerical bounds, and I will present initial results on gravitational effective theories.

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