ATLAS Event Display: Candidate event in search for heavy resonances

Display of an event (Run 362204, Event 2842448996) from proton–proton collisions recorded by ATLAS with LHC stable beams at a collision energy of 13 TeV with one electron (pT 616 GeV), one muon (pT 444 GeV), one jet within detector acceptance (pT 37 GeV), and a large amount of missing transverse momentum (414 GeV at φ=-0.95). This makes it a candidate for a production of a heavy neutral particle via fusion of two vector bosons (VBF), where a jet resulting from a second quark would be outside the detector acceptance and thus not visible. The transverse mass of the system of the electron, muon and missing transverse momentum is 1.4 TeV, which is a lower bound for the mass of the hypothetical heavy particle. The display shows the tracks of charged particles as they are reconstructed in the inner detector (orange tracks), the energy deposits in the LAr (green/teal boxes) and Tile (yellow/orange boxes) calorimeters, the electron track in green, and the track reconstructed in the muon spectrometer (red track) together with the associated muon chambers (blue boxes). The missing transverse momentum in the event is indicated by the dashed white line.