Speaker
Tamanna Jain
Description
In this talk, I will present our recent work on post-Minkowskian EFT for scalar-tensor theories and boson stars. We first derive the analytical expressions of the scattering angle using PM-EFT techniques for both the cases, and in particular provide the first analytical treatment of boson stars as a two-body problem. We then derive the effective-one-body description of these systems. We then compare analytic results to the scattering angle extracted from sequences of numerical-relativity simulations at fixed energy, varying impact parameter, and coupling strength. We find excellent agreement for both the cases.