Eikonal phase matrix, deflection angle, and time delay in effective field theories of gravity
Eikonal phase matrix, deflection angle, and time delay in effective field theories of gravity
The eikonal approximation is an ideal tool to extract classical observables in gauge theory and gravity directly from scattering amplitudes. Here we consider effective theories of gravity where in addition to the Einstein-Hilbert term we include non-minimal couplings of the type $R^3$, $R^4$ and $FFR$. In particular, we study the …