Julio Parra Martinez - Collider tools for classical gravity

Tuesday 27 Apr 2021, 16:00 → 18:00 Europe/Zurich

CERN

Zoom virtual seminar: Click here to enter room

Abstract:

I will describe recent progress in the program to apply tools originally developed for computing cross sections in colliders to problems in classical general relativity. This effort has recently produced state-of-the-art computations of quantities relevant for current and future gravitational wave detectors, such as the conservative two-body Hamiltonian at the fourth order in Newton’s constant, G^4, as well as the G^3 radiated energy in binary black hole encounters and elliptical orbits. I will explain how these calculations were made possible by leveraging on-shell techniques, effective field theory, modern loop integration machinery and an improved understanding of the connection between classical scattering amplitudes and the semiclassical on-shell action.