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Particle tracks from a proton-proton collision (also called an event) in the ATLAS experiment at CERN's Large Hadron Collider (LHC). Events like this are a possible sign of the Higgs particle, though many events must be analyzed together to say with confidence the signal came from the elusive particle.
Physicists have searched for it for years, but what is the Higgs boson supposed to do, exactly?
This event observed at the LHC's CMS experiment shows a candidate event involving two Z bosons, in which one Z decays to two electrons (green towers), and the other to two muons (red lines). Such an event might indicate signs of the Higgs boson.