Abstract:

I this talk I will describe recent progress in calculating the gravitational deflection angle in theories with varying amounts of supersymmetry. I will explain how this quantity can be extracted from the large angular momentum limit of four point scattering amplitudes, as well as, how some old and new S-matrix theory techniques can make this task simpler.  I will show through explicit calculation that the classical corrections to the massless angle are universal.  Similarly, I will provide evidence that the same is true in the massive case at high energies. Finally, I will discuss the consequences of these results for the Post-Minkowskian (PM) Effective One Body (EOB) resummation with application to LIGO physics.