The SAGEX review on scattering amplitudes Chapter 2: An invitation to color-kinematics duality and the double copy

Abstract Advances in scattering amplitudes have exposed previously-hidden color-kinematics and double-copy structures theories ranging from gauge gravity to effective field such as chiral perturbation theory the Born–Infeld model. These novel both simplify higher-order calculations pose tantalizing questions related a unified framework underlying relativistic quantum theories. This introductory mini-review article invites further exploration of these topics. After brief introduction duality double copy they emerge at tree loop-level theories, we present two distinct examples: (1) an web double-copy-constructible (2) discussion application calculation relevant gravitational-wave physics.