# From KMOC to WQFT in Yang-Mills and gravity

### APA

de la Cruz, L. (2022). From KMOC to WQFT in Yang-Mills and gravity. Perimeter Institute. https://pirsa.org/22110113

### MLA

de la Cruz, Leonardo. From KMOC to WQFT in Yang-Mills and gravity. Perimeter Institute, Nov. 28, 2022, https://pirsa.org/22110113

### BibTex

@misc{ pirsa_22110113, doi = {10.48660/22110113}, url = {https://pirsa.org/22110113}, author = {de la Cruz, Leonardo}, keywords = {Particle Physics, Quantum Fields and Strings}, language = {en}, title = {From KMOC to WQFT in Yang-Mills and gravity}, publisher = {Perimeter Institute}, year = {2022}, month = {nov}, note = {PIRSA:22110113 see, \url{https://pirsa.org}} }

Leonardo de la Cruz CEA Saclay

**Collection**

**Talk Type**Scientific Series

## Abstract

Recently, powerful quantum field theory techniques, originally developed to calculate observables in colliders, have been applied to describe classical observables relevant to gravitational wave physics. This has motivated a proliferation of approaches to extract classical information from quantum scattering amplitudes. Since the double copy suggests that the basis of the dynamics of general relativity is Yang-Mills theory, in this talk I will first discuss scattering in Yang-Mills theory as a toy model to study the connection between the framework by Kosower-Maybee-O'Connell (KMOC), the language of effective field theory (EFT) and the eikonal phase. After a brief review of the KMOC formalism to compute classical observables from scattering amplitudes, I will consider the dynamics of colour-charged particle scattering and explain how to compute the change of colour, and the radiation of colour, during a classical collision. Finally, moving on to gravity, I will discuss the deflection of light by a massive spinless/spinning object using the novel worldline quantum field theory (WQFT) formalism for classical scattering.

Zoom link: https://pitp.zoom.us/j/98649931693?pwd=Z2s1MlZvSmFVNEFqdjk2dlZNRm9PQT09