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The exclusive mode
In this mode, the algorithm separates the `hard final state' from the
soft `beam remnants' explicitly. Jets are defined in the hard final
state by a stopping parameter
with dimensions of energy squared.
 and are defined as in section 2.1.
 Find , the smallest value among the and . If
, all remaining objects in the event will be
classified as jets, and the algorithm is complete.
 If a is the smallest, and are combined into a
single object with momentum according to a user specified
recombination scheme (parameter recom). If a is the
smallest, object is included in a `beam jet' and removed from the list.
Go back to (2).
Note that the stopping
parameter
defines the hard scale of the process
(
, where is the
centreofmass energy). One can therefore think of the hard subprocess
being factorised from the low scattering fragments, which
are thrown away into the beam jets.
Instead of specifying the stopping scale
, one can choose to
stop merging when a given number of jets is reached.
Next: Subjet analysis and mode
Up: The algorithm
Previous: The inclusive mode
Jonathan Couchman
20021002
