To expand a little -- the process is known as light-by-light scattering. Searching will turn up plenty of good references, like this one: https://home.cern/abo

To expand a little -- the process is known as light-by-light scattering. Searching will turn up plenty of good references, like this one: https://home.cern/about/updates/2017/08/atlas-observes-direct-evidence-light-light-scattering https://home.cern/about/updates/2017/08/atlas-observes-direc...