Insights on the worldsheet loop expansion from Dimensional deformations on T-dual supergravtity formulations

BARON, WALTER H.

La PLata

Conferencia; 50 years of dimensional regularization; 2022

String Theory is an extension of Einstein Gravity that predicts an infinite tower of higher derivative interactions.Different symmetries of the theory constrain allowed couplings and offer an alternative way to the worldsheet loop-expansion that may fix them total or partially. When specializing in the T-duality implications Double Field Theory is a distinguished framework as such a symmetry is linearly realized. In this talk I will focus on a particular technique that enlarge the dimension of the space and subsequently truncate it to generate an infinite tower of interaction terms in the low energy effective action that exactly closes under diffeomorphisms, Lorentz and T-duality.