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This chapter reviews recent progress in formulating and extending doublecopy constructions for scattering amplitudes in supergravities with eight supercharges (N = 2 supersymmetry) in five and four spacetime dimensions. In particular, we consider amplitudes in Maxwell-Einstein theories with symmetric and homogeneous target spaces and in Yang-Mills-Einstein theories with compact gauge groups, identifying the gauge-theory factors entering the construction. Extension of the construction to theories with spontaneously broken gauge symmetry is also discussed.

Simplifying amplitudes in Maxwell-Einstein and Yang-Mills-Einstein supergravities