Animated ATLAS Event Display: "Pile Up" collisions

Four dynamic views of a muon-triggered recorded bunch crossing from data collected by the ATLAS Experiment on 12 June 2018 (Run 352514, Event 1031263761), shown together with the ATLAS detector geometry and highlighting the reconstruction of pileup collisions. The bunch crossing contains a di-muon event, consistent with a Z boson, as the triggering primary vertex and two other good dijet pileup primary vertices. The two muons are shown as red lines. The jets are colour-coded to show which vertex they come from: the two blue jets come from a second vertex, and the two green jets come from a third vertex, meaning that they come from independent proton-proton collisions within the same bunch crossing. Tracks are shown in orange, and the yellow blocks correspond to energy depositions in the calorimeters.