Soft and collinear limits in $$ \mathcal{N} $$ = 8 supergravity using double copy formalism

Abstract

Abstract It is known that 𝒩 = 8 supergravity is dual to 𝒩 = 4 super Yang-Mills (SYM) via the double copy relation. Using the explicit relation between scattering amplitudes in the two theories, we calculate the soft and collinear limits in 𝒩 = 8 supergravity from know results in 𝒩 = 4 SYM. In our application of double copy, a particular self-duality condition is chosen for scalars that allows us to constrain and determine the R-symmetry indices of the supergravity states in the collinear limit.