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 propose a world sheet formula for tree-level correlation functions describing a scalar
field with arbitrary mass and quartic self-interaction in de Sitter space, which is a simple …

A bstract We recently proposed a formula for tree-level n-point correlators of massive ϕ 4
theory in de Sitter momentum space which consists of an integral over n punctures on the …

A bstract We take a major step towards computing D-dimensional one-loop amplitudes in
general gauge theories, compatible with the principles of unitarity and the color-kinematics …

We explain a procedure to manifest the Bern–Carrasco–Johansson duality between color
and kinematics in n-point one-loop amplitudes of a variety of supersymmetric gauge …

Starting with Witten's twistor string, chiral string theories have emerged that describe field
theory amplitudes without the towers of massive states of conventional strings. These …

A bstract We present new and explicit formulae for the one-loop integrands of scattering
amplitudes in non-supersymmetric gauge theory and gravity, valid for any number of …

A bstract We present new formulas for one-loop ambitwistor-string correlators for gauge
theories in any even dimension with arbitrary combinations of gauge bosons, fermions and …

A bstract In the low-energy effective action of string theories, non-abelian gauge interactions
and supergravity are augmented by infinite towers of higher-mass-dimension operators. We …

A bstract We present a method to compute the integrands of one-loop Einstein-Yang-Mills
amplitudes for any number of external gauge and gravity multiplets. Our construction relies …