FastJet code documentation

These pages provide automatically generated documentation for the FastJet package.

The most useful classes

Many of the facilities of FastJet can be accessed through the three following classes:

• PseudoJet: the basic class for holding the 4-momentum of a particle or a jet.

• JetDefinition: the combination of a JetAlgorithm and its associated parameters. Can also be initialised with a plugin.

• ClusterSequence: constructed with a vector of input (PseudoJet) particles and a JetDefinition, it computes and stores the information on how the input particles are clustered into jets.

Selected more advanced classes

• ClusterSequenceArea: with the help of an AreaDefinition, provides jets that also contain information about their area.

Selected additional tools

• JetMedianBackgroundEstimator: with the help of a Selector, a JetDefinition and an AreaDefinition, allows one to estimate the background noise density in an event; for a simpler, quicker, effective alternative, use GridMedianBackgroundEstimator

• Transformer: class from which are derived various tools for manipulating jets and accessing their substructure. Examples are Subtractor, Filter, Pruner and various taggers (e.g. JHTopTagger and MassDropTagger).

Further information

• Selected classes ordered by topics can be found under the modules tab.

• The complete list of classes is available under the classes tab.

• For non-class material (enums, typedefs, functions), see the fastjet documentation

• For further information and normal documentation, see the main FastJet page.

Examples

See our FastJet examples page