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Gravitational Self-Force and Scattering Amplitudes Workshop

19–22 Mar 2024
Higgs Centre Seminar Room
Europe/London timezone

Contribution List

11 out of 11 displayed
  1. 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.

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  2. 2. Analytic self-force: Bound and Unbound -PN, PM, SF and just that (Chris Kavanagh)
    Chris Kavanagh
    19/03/2024, 11:00
  3. 4. State of the art in gravitational self-force (Barry Wardell)
    Barry Wardell
    19/03/2024, 13:30
  4. 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...

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  5. 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...

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  6. 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...

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  7. 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...

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  8. 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...

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  9. 10. An Effective Field Theory for Extreme Mass Ratios (Clifford Cheung)
    Clifford Cheung
    21/03/2024, 13:30
  10. 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...

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  11. 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...

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