MSc Research Project Sam Veldmeijer

Title:
Extending the double copy for interacting scalar effective field theories.

Abstract:
The double copy as proposed by Bern, Carrasco and Johansson systematically relates the tree-level amplitudes of gauge theories and gravity. We investigate the implications of the double copy for a triplet of scalar effective field theories. We discuss how these theories are related via flavour-kinematics duality, analogous to the colour-kinematic between gravity and gauge theories. At the off-shell level, we identify a specific mapping between the three theories that is crucially dependent on their non-linear symmetries. Similarly, we investigate the on-shell amplitude structures and the duality between their building blocks. Our results highlight a common structure that underlies the physics of different Goldstone modes.