ATLAS event display : W boson pair produced from two photons

A 2018 ATLAS event display consistent with the production of a pair of W bosons from two photons, where the W bosons decay into a muon and an electron (visible in the detector) and neutrinos (not detected). The muon path (red line) and electron path (yellow line) are shown. The electron deposits its energy in the electromagnetic calorimeter (yellow blocks). The many particles reconstructed in the Inner Detector are shown in orange. Top left corner shows that these particles do not originate from the same interaction and are thus attributed to additional proton–proton interactions.