44 citations · 145 across the 8 of their papers we have counts for
8 papers · 1 filter
Ambitwistor formulations of gravity and gauge theories
Thales Azevedo, Oluf Tang Engelund
We consider -dimensional amplitudes in gravities (conformal gravity in ) and in the recently introduced gauge theory, from the perspective of the CHY formula…
Lagrangian Insertion in the Light-Like Limit and the Super-Correlators/Super-Amplitudes Duality
Oluf Tang Engelund
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 real space and show that…
On the asymptotic states and the quantum S matrix of the -deformed superstring
Oluf Tang Engelund, Radu Roiban
We investigate the worldsheet S matrix of string theory in -deformed . By computing the six-point tree-level S matrix we explicitly show that there is no partic…
A twistor string for the ABJ(M) theory
Oluf Tang Engelund, Radu Roiban
We construct an open string theory whose single-trace part of the tree-level S-matrix reproduces the S-matrix of the ABJ(M) theory with a unitary gauge group. We also demonstrate t…
Generalized unitarity and the worldsheet S matrix in AdS_n x S^n x M^(10-2n)
Oluf Tang Engelund, Ryan W. McKeown, Radu Roiban
The integrability-based solution of string theories related to AdS(n)/CFT(n-1) dualities relies on the worldsheet S matrix. Using generalized unitarity we construct the terms with…
Correlation functions of local composite operators from generalized unitarity
O. Tang Engelund, R. Roiban
We describe the use of generalized unitarity for the construction of correlation functions of local gauge-invariant operators in general quantum field theories and illustrate this…
On correlation functions of Wilson loops, local and non-local operators
Oluf Tang Engelund, Radu Roiban
We discuss and extend recent conjectures relating partial null limits of correlation functions of local gauge invariant operators and the expectation value of null polygonal Wilson…
Gravitino Interactions from Yang-Mills Theory
N. E. J. Bjerrum-Bohr, Oluf Tang Engelund
We fabricate gravitino vertex interactions using as only input on-shell Yang-Mills amplitudes and the Kawai-Lewellen-Tye gauge theory / gravity relations. A useful result of this a…