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Monday, October 25, 2021
4:00 PM - 5:00 PM
Online and In-Person Event

High Energy Physics Seminar

Collider physics tools for classical gravitational wave observables
Enrico Herrmann, UCLA,

In this talk, I will review some of the computational advances in the extraction of classical precision observables for the relativistic two-body problem in General Relativity relevant to present and future gravitational wave observatories. We work in a framework devised by Kosower, Maybee, and O'Connell (KMOC) which expresses classical observables in terms of scattering amplitudes. I will highlight how collider physics ideas, such as generalized unitarity, integration-by-parts relations, the method of regions, reverse unitarity, and differential equations allow us to compute for example the scattering angle and the radiated energy for the collision of two black holes to order G^3 (third Post-Minkowskian order). I will also briefly explore the generalization of these ideas to other classical observables, such as the radiated angular momentum, as well as to different classes of theories (including scalar QED) to explore certain universal behavior in the classical limit.

Limited occupancy in 269 Lauritsen - must have Caltech ID to attend in person seminar.

Contact for Zoom information.