Jet Finders

Pythia comes with two built-in jet finders, ClusterJet for e^+e^- events and CellJet for hadron collider ones. Especially the latter is not so well matched to the standards of its field, however. (But it is closely related to the anti-kT algorithm, so is also not completely disconnected [Cac08].)

FastJet

For realistic jet studies the FastJet package [Cac06] has become a standard. Several different jet options are available, such as kT, Cambridge/Aachen, anti-kT and SISCone.

Linking to FastJet is foreseen in the configure file in the examples subdirectory, and the main61.cc program contains an example how it can be used with Pythia events.