ATLAS Experiment CERN
The Top Quark

A pair of top quarks – a top quark and an antitop quark - is expected to be produced in collisions when a gluon from each of the protons merges in a high energy collision – a gluon fusion.

      • The very massive top quarks will instantly start a sequence of decays into less and less massive quarks giving rise to a large number of quarks and leptons, like the electron and the muon. The b, c, s and u quarks that make up the complex decay sequence will combine with other quarks to form bound particle states, which can travel visible distances in the detector before they decay.