Gravitational Self-Force and Scattering Amplitudes Workshop

Contribution List

1. ACV, BCJ, EFT, EOB, MPM, PM, PN, QFT, SF, WQFT and All That (Thibault Damour)

Thibault Damour (IHES)

19/03/2024, 09:30

A personal perspective on the recently explored synergies between various
approaches to the general relativistic two-body problem will be presented.

2. Analytic self-force: Bound and Unbound -PN, PM, SF and just that (Chris Kavanagh)

Chris Kavanagh

19/03/2024, 11:00

4. State of the art in gravitational self-force (Barry Wardell)

Barry Wardell

19/03/2024, 13:30

6. Self-force in black hole scattering: a scalar-field toy model (Chris Whittall)

Chris Whittall

20/03/2024, 09:30

Calculations of the scattering angle in hyperbolic black hole encounters have been of recent cross-disciplinary interest, driven by its potential to advance post-Minkowskian theory and the effective-one-body model of binary dynamics. In this talk I will consider the self-force approach to modelling black hole scattering, starting with a general introduction to self-force theory and the...

7. Comparing numeric and analytic methods for black hole scattering in unequal mass systems (Oliver Long)

Oliver Long (AEI)

20/03/2024, 11:00

In this talk, we address the significance of studying hyperbolic orbits in gravitational physics by comparing different methods of calculating scattering observables. We begin by detailing a numerical calculation method for the scalar self-force correction to the scattering angle and juxtapose these results with analytical expressions derived from scattering-amplitude methods, up to fourth...

13. Wonders of Kerr-Schild geometry (Abraham Harte)

Abraham Harte

20/03/2024, 13:30

Kerr-Schild geometry has recently seen a surge of interest, appearing in double-copy constructions, in the highly-regular gauge used in the second-order self-force, and elsewhere. This talk explores some of the remarkable properties of Kerr-Schild geometry: It can be used to eliminate nonlinearities in Einstein's equation, can improve accuracy in perturbation theory, can be used to generate...

8. Gravitational Self Force from Scattering Amplitudes in Curved Space (Dimitrios Kosmopoulos)

Dimitrios Kosmopoulos

21/03/2024, 09:30

I will present a novel approach for calculating observables in the context of the binary inspiral problem which is designed to leverage the all-orders-in-G information carried by exact solutions of the Einstein equations. This framework computes scattering amplitudes in the curved-space setup where a light particle of mass m is treated as a probe in the geometry sourced by a heavy particle of...

9. On-shell approaches to self-force using amplitudes on backgrounds (Sonja Klisch)

Sonja Klisch

21/03/2024, 11:00

At leading order, the self-force expansion describes the geodesic motion of a massive point particle on a non-trivial background. Consequently, if we seek to calculate classical observables in this expansion using scattering amplitudes, a natural starting point is from a QFT on this non-trivial background. Amplitudes here capture the full non-linearities of the theory, including effects such...

10. An Effective Field Theory for Extreme Mass Ratios (Clifford Cheung)

Clifford Cheung

21/03/2024, 13:30

12. Gravitational two-body dynamics at NNNLO in post-Minkowskian approximation (Zhengwen Liu)

Zhengwen Liu

22/03/2024, 09:30

High-accuracy theoretical predictions for the motion of compact binary systems are crucial for maximizing the discovery potential of current and future gravitational-wave observations, such as LIGO-Virgo-Kagra and LISA. The Effective Field Theory methodology, combined with modern multi-loop techniques, has proven to be exceptionally powerful for analytically solving the gravitational two-body...

11. Conservative Black Hole Scattering at 5PM-1SF Order (Gustav Mogull)

Gustav Mogull

22/03/2024, 11:00

In this talk I will discuss our recent calculation of the conservative fifth post-Minkowskian (5PM) scattering angle, at first order in self-force, using the Worldline Quantum Field Theory (WQFT) formalism. This challenging calculation involved performing four-loop Feynman integrals, and surprisingly resulted in a total absence of the elliptic functions present at 4PM order — the entire result...