Alladi Ramakrishnan Hall

A d-Dimensional Stress Tensor for Minkowski (d+2)-Gravity

Prahar Mitra

IAS, Princeton

We consider the tree-level scattering of massless particles in (d+2)-dimensional asymptotically flat spacetimes. The S-matrix
elements are recast as correlation functions of local operators living on a space-like cut M_d of the null momentum cone. The Lorentz group SO(d+1,1) is nonlinearly realized as the Euclidean conformal group on M_d. Using the soft-photon and soft-graviton theorems, we construct the U(1) current J_a and stress-tensor operator T_{ab} for the boundary CFT_d.