[NTU-NCTS String Seminar] Gravitational bound waveforms from amplitudes

  • Event Date: 2024-04-03
  • High energy theory
  • Speaker: Riccardo Gonzo (University of Edinburgh)  /  Host: Profs. Yu-tin Huang & Pei-Ming Ho (NTU)
    Place: Rm. 815, Dept. of Physics, NTU

Title:Gravitational bound waveforms from amplitudes
Speaker:Riccardo Gonzo (University of Edinburgh)
Date:2024/04/03 (Wed.)

We will develop a formalism to study the gravitational waveform emitted during the inspiral phase of the dynamics of compact objects (black holes, neutron stars) using the effective field theory approach with a point particle description. First, we will consider the scattering setup for the two-body problem where a natural on-shell relation between waveforms and amplitudes can be established in the classical limit. We will then derive a new surprising on-shell map between scattering and bound waveforms, which is inspired and confirmed by Post-Newtonian calculations with the standard time-domain multipoles. Finally, we will show that a resummation of the perturbative series is required to make contact with phenomenological waveform models.

Zoom link: https://us02web.zoom.us/j/84857450605?pwd=dndvdkF1TGlVb0xVKytIZXpFV2xoUT09