Event Display Pictures : Multi-Jet Hadronic Events
In some hadronic events, the initial high-energy quark and or antiquark pair may radiate a high-energy gluon before the production of additional quarks and antiquarks in the strong force field is completed. These gluons also show up in the event picture, because they provide a different pattern. The momentum of each high-energy gluon appears as an additional jet of hadrons. This process results in three, four, or even five jet events. Sometimes though, as these pictures show, it is very clear to see.
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 Event 01536_2126_600_z_4jet |
 Event 12637_6353_600_z_3jet |
By studying the patterns of many events -- how often are there two, three, or four jets, what are the patterns of likely angles between the jets, how many particles in a jet of given energy, etc.-- physicists test and refine their understanding of QCD - the theory of the interactions of quarks and gluons.
