Speaker
Description
In this talk, I will present a new formulation of the effective-one-body (EOB) dynamics, particularly well suited for incorporating post-Minkowskian information into waveform models for compact binaries. This is especially timely, as several groups worldwide are currently working to derive increasingly accurate post-Minkowskian results for the two-body problem. After motivating the shift in perspective introduced by our approach, I will discuss its main features and show how, through the crucial use of a Lagrange multiplier in the EOB action, it leads to new EOB equations of motion in Euler–Lagrange form. Finally, I will illustrate the performance of an EOB model based on this new Lagrange-EOB dynamics, which combines post-Newtonian and post-Minkowskian information, and I will mention recent developments for neutron-star systems.