Advances in scattering amplitudes have exposed previously-hidden color-kinematics and
double-copy structures in theories ranging from gauge and gravity theories to effective field …

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 …

We show that double-copy maps for amplitudes in effective field theory are severely
constrained at four points by self-consistency and locality at six points. The resulting double …

A bstract We show that color-kinematics duality is a manifest property of the equations of
motion governing currents and field strengths. For the nonlinear sigma model (NLSM), this …

A bstract It was recently proposed that the kinematic algebra featuring in the colour-
kinematics duality for scattering amplitudes in heavy-mass effective field theory (HEFT) and …

A bstract We generalize the color/kinematics duality of flat-space scattering amplitudes to the
embedding space formulation of AdS boundary correlators. Kinematic numerators and …

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 …

A bstract We study gravitational shock waves using scattering amplitude techniques. After
first reviewing the derivation in General Relativity as an ultrarelativistic boost of a …

In this paper, we study tree-level scattering amplitudes of scalar particles in the context of
effective field theories. We use tools similar to the soft bootstrap to build an ansatz for …

A bstract Color-kinematics duality in the adjoint has proven key to the relationship between
gauge and gravity theory scattering amplitude predictions. In recent work, we demonstrated …