Lagrangian insertion in the light-like limit and the super-correlators/super-amplitudes duality
Oluf Engelund (Department of Physics and Astronomy, Uppsala University, SE-751 08, Uppsala, Sweden)
In these notes we describe how to formulate the Lagrangian insertion technique in a way that mimics generalized unitarity. We introduce a notion of cuts in position space and show that the cuts of the correlators in the super-correlators/super-amplitudes duality correspond to generalized unitarity cuts of the equivalent amplitudes. The cuts consist of correlation functions of operators in the chiral part of the stress-tensor multiplet as well as other half-BPS operators. We will also discuss the application of the method to other correlators as well as non-planar contributions.
