From KMOC to WQFT in Yang-Mills and gravity


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


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


          @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


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