ATLAS Event Displays: Search for dark photons in Higgs boson decays

Candidate event displays in the search for dark photons, originated from the decay of a Higgs boson produced in association with a Z boson. The Higgs boson would decay to a photon (green and yellow columns not associated to a green line) and a dark photon (yielding a missing transverse energy signature, indicated by the dashed purple lines), while the Z boson decays to two electrons (event with green lines) or two muons (event with red lines).