QCD Meets Gravity 2023

Session

Thursday PM 2

14 Dec 2023, 16:00

4/3-006 - TH Conference Room (CERN)

Conveners

Thursday PM 2: Gravitational Waves

• Vittorio Del Duca (Universita e INFN Torino (IT))

32. Black Hole Scattering: the Self-Force Approach

Christopher Whittall

14/12/2023, 16:00

Calculations of the scatter 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. I will then...

33. Understanding the NLO Scattering Waveform: Soft Limit and Post-Newtonian Expansion

Fei Teng

14/12/2023, 16:30

I will present the full NLO scattering waveform computed from the observable based formalism. The waveform satisfies the universal soft theorem up to the NNLO. I will end the talk by comparing the result with that computed from the Multipolar-Post-Minkowskian formalism, which requires a rotation of the incoming center-of-mass frame to align with that at the minimal approach.

34. 4PM Scattering of Spinning Black Holes and Neutron Stars

Gustav Mogull

14/12/2023, 17:00

I will discuss our recent calculations of the observables (impulse, spin kick, scattering angle) involved in the scattering of two black holes or neutron stars at fourth post Minkowskian order (three-loop order) using the Worldline Quantum Field Theory (WQFT) framework. These 4PM observables now include both spin-orbit and adiabatic tidal corrections — inclusion of the latter necessitates a...

35. Multipole Moments, Time-derivative Operators, and the Kerr Compton Amplitud

TREVOR SCHEOPNER

14/12/2023, 17:30

In Dixon's original papers on the Mathisson–Papapetrou–Dixon worldline equations of motion for extended bodies in general relativity, he found the unique definition for the multipole moments of the stress tensor for a body in general motion in curved spacetime. This definition coincides only with the stationary multipole moments of the body which are determined by the three-point amplitude...