Speaker: Ira Rothstein
The EFT of SuperPlanckian Scattering
While quantum gravity is well understood as an effective field theory when all invariants are sub-Planckian, the super-Planckian (Regge) limit still poses open questions which we are just now starting to address. This limit leads a strong coupling problem which forces us to reorganize the calculation via resummations in order to maintain theoretical control. In this talk I will use an recently designed EFT of gravity in this Regge to reveal the structure of the series which must take a very particular form. I will then show how this EFT can be used to calculate higher order loops results using lower order results in conjunction with the rapidity renormalization group. I will also address the question of collinear singularities in this limit which Weinberg famously showed cancel for wide angle scattering.