We give a comprehensive review of recent developments on using the pure spinor
formalism to compute massless superstring scattering amplitudes at tree level. The main …

The double copy is, in essence, a map between scattering amplitudes in a broad variety of
familiar field and string theories. In addition to the mathematically rich intrinsic structure, it …

A bstract It has been shown that a special set of three-point amplitudes between two
massive spinning states and a graviton reproduces the linearised stress-energy tensor for a …

A bstract We formulate a new program to generalize the double-copy of tree amplitudes. The
approach exploits the link between the identity element of the “KLT algebra” and the KLT …

We present for the first time classical multiparticle solutions in anti–de Sitter space (AdS)
involving scalars, gluons, and gravitons. They are recursively defined through multiparticle …

A bstract Scattering amplitudes in Yang-Mills theory are known to exhibit kinematic
structures which hint to an underlying kinematic algebra that is dual to the gauge group color …

In this Letter, we present a recursive method for computing one-loop off-shell integrands in
colored quantum field theories. First, we generalize the perturbiner method by recasting the …

We discuss relations between closed and open string amplitudes at one loop. While at tree
level these relations are known as Kawai-Lewellen-Tye (KLT) and/or double copy relations …

We find that the duality between color and kinematics can be used to inform the high energy
behavior of effective field theories. Namely, we demonstrate that the massless gauge theory …

A bstract We derive a massive double copy construction within string theory. To this end, we
use massive vectors of the open string spectrum that appear in compactifications to four …