Observation of light-by-light scattering in ultraperipheral Pb+Pb collisions with the ATLAS detector

ATLAS Collaboration

This letter describes the observation of the light-by-light scattering process, $\gamma \gamma \to \gamma \gamma$, in Pb+Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV. The analysis is conduct…