More on the duality correlators/amplitudes

International audienceWe continue the study of n-point correlation functions of half-BPS protectedoperators in N=4 super-Yang-Mills theory, in the limit where the positions ofthe adjacent operators become light-like separated. We compute the l-loopcorrections by making l Lagrangian insertions. We argue that there exists asimple relation between the (n+l)-point tree-level correlator with l Lagrangianinsertions and the integrand of the n-particle l-loop MHV scattering amplitude,as obtained by the recent momentum twistor construction of Arkani-Hamed et al.We present several examples of this new duality, at one and two loops