@article{66, keywords = {Classical and Quantum Gravitation, Elementary Particles, Physics, Physics and Astronomy, Quantum Field Theories, Quantum Field Theory, Quantum Physics, Regular Article - Theoretical Physics, Relativity Theory, String Theory}, author = {Marco Chiodaroli and Murat G{\"u}naydin and Henrik Johansson and Radu Roiban}, title = {Scattering amplitudes in N=2 Maxwell-Einstein and Yang-Mills/Einstein supergravity}, abstract = {A bstract We expose a double-copy structure in the scattering amplitudes of the generic Jordan family of N = 2 Maxwell-Einstein and Yang-Mills/Einstein supergravity theories in four and five dimensions. The Maxwell-Einstein supergravity amplitudes are obtained through the color/kinematics duality as a product of two gauge-theory factors; one originating from pure N = 2 super-Yang-Mills theory and the other from the dimensional reduction of a bosonic higher-dimensional pure Yang-Mills theory. We identify a specific symplectic frame in four dimensions for which the on-shell fields and amplitudes from the double-copy construction can be identified with the ones obtained from the supergravity Lagrangian and Feynman-rule computations. The Yang-Mills/Einstein supergravity theories are obtained by gauging a compact subgroup of the isometry group of their Maxwell-Einstein counterparts. For the generic Jordan family this process is identified with the introduction of cubic scalar couplings on the bosonic gauge-theory side, which through the double copy are responsible for the non-abelian vector interactions in the supergravity theory. As a demonstration of the power of this structure, we present explicit computations at tree-level and one loop. The double-copy construction allows us to obtain compact expressions for the supergravity superamplitudes, which are naturally organized as polynomials in the gauge coupling constant.}, year = {2015}, journal = {The journal of high energy physics}, volume = {2015}, number = {1}, language = {English}, }