The soft limits of scattering amplitudes have been extensively studied due to their essential
role in the computation of physical observables in collider physics. The universal …

Scattering amplitudes have their origin in quantum field theory, but have wide-ranging
applications extending to classical physics. We review a formalism to connect certain …

We argue that the complex transformation relating the Schwarzschild to the Taub-NUT
metric, introduced by Talbot, is in fact an electric-magnetic duality transformation. We show …

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 We study celestial chiral algebras appearing in celestial holography, using the light-
cone gauge formulation of self-dual Yang-Mills theory and self-dual gravity, and explore also …

The classical double copy relates exact solutions of gauge, gravity, and other theories.
Although widely studied, its origins and domain of applicability have remained mysterious. In …

A bstract The three-point amplitude is the key building block in the on-shell approach to
scattering amplitudes. We show that the classical objects computed by massive three-point …

A bstract We study the connection of Moyal deformations of self-dual gravity and self-dual
Yang-Mills theory to chiral higher-spin theories, and also to deformations of operator …

A bstract We employ the “KMOC” formalism of [1] to compute classical momentum
deflections of spinning bodies with arbitrary spin orientations up to next-to-leading order …

We show that the BRST Lagrangian double copy construction of supergravity as the
'square'of Yang–Mills theory finds a natural interpretation in terms of homotopy algebras. We …