Orateur
Description
Recent advancements in the field of scattering amplitudes have led to efficient methods for analytically evaluating two-body gravitational scattering in post-Minkowskian expansions. By utilizing an exponential representation of the S-matrix, we have successfully determined the spinless two-body scattering up to the fourth post-Minkowskian order. These results encompass both conservative and gravitational radiation effects and are applicable from small to very high relative velocities.
In this presentation, we will discuss our very recent determination at the 4PM order for spinless massive bodies. Additionally, we will examine its behavior at high energies, in connexion with into the current puzzles surrounding gravitational radiation at this order.
