A new gauge-invariant double copy for heavy-mass effective theory
A new gauge-invariant double copy for heavy-mass effective theory
A bstract We propose a new form of the colour-kinematics/double-copy duality for heavy-mass effective field theories, which we apply to construct compact expressions for tree amplitudes with heavy matter particles in Yang-Mills and in gravity to leading order in the mass. In this set-up, the new BCJ numerators are fixed …