# The Born regime of gravitational amplitudes

- Institution: CERN
- Department: TH String Theory Seminar
- Speaker: Giulia Isabella
- Year: 2024
- Language: English
- Source: [CERN](https://videos.cern.ch/record/3020133)
- Licence: [CERN](http://copyright.web.cern.ch)
- Who can watch: Teens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

I will discuss 2 -> 2 scattering in the regime where the wavelength of the scattered objects is comparable to the impact parameter but much larger than any Compton wavelength in the QFT. In this regime - which differs from the eikonal - the Feynman diagram expansion organizes itself naturally in terms of a geometric (or Born) series that iterates an effective "quantum mechanical" potential. We show that in a gravitation context the series becomes a perturbative solution of the Regge-Wheeler or Teukolsky equation. I will discuss two applications of this observation: determination of Love numbers and dissipative effects of compact objects and amplitudes in a Kerr background. (Online Talk)

## Lectures

1. [The Born regime of gravitational amplitudes](https://invisiblenetwork.ai/learn/cern/3020133/aa641da46ad5), 1 h 14 min (CERN's player)