Remote Nordic HET seminar: Mao Zeng

Speaker: Mao Zeng

Title: New results for gravitational binary dynamics from scattering amplitudes

Abstract: Precision predictions for binary mergers are essential for the nascent field of gravitational wave astronomy. The early inspiral part can be treated by perturbative expansions. We present results for the post-Minkowskian expansion of conservative binary dynamics, previously available only at the 2nd order for several decades, at the 3rd and 4th orders. Our calculations are based on powerful modern methods for scattering amplitudes, effective field theories, and advanced loop integration techniques. Furthermore, we explore the new frontier of calculating radiative binary dynamics from scattering amplitudes. We obtain analytically the total radiated energy in hyperbolic black hole scattering, at the leading order in G but all orders in velocity.