Color-kinematics duality, double copy and the unitarity method for higher-derivative QCD and quadratic gravity
Color-kinematics duality, double copy and the unitarity method for higher-derivative QCD and quadratic gravity
Here we discuss color-kinematics duality for higher-derivative QCD-like amplitudes. We explicitly show that the duality still holds in this case and it can be instrumental in constructing the associated quadratic-gravity amplitudes by using the double-copy prescription. This allows one to drastically simplify calculations. We also evaluate some tree-level Compton scattering …