Calculate the Qw substructure variable : minimum invariant mass of pairs from 3 subjets. This implementation supports 3 different ways of finding the 3 subjets. These 3 variants are chosen by the 1st argument to the constructor.
- Normal : exactly 3 subjets are requested by calling ClusterSequence::exclusive_jets(3) on the constituents. (in this case the 2nd argument of ctor is ignored). The 2 other variants are (very) experimental :
- MassCut : same as above, then the subjets are splitted into their parents if their mass > massCut (this cut is set by the 2nd argument of ctor). This splitting is done recursively as long as mass > massCut. Finally we choose the 3 highest pt subjets.
- SmallSubjets : Consider the 3 highest pt subjets obtained from ClusterSequence::inclusive_jets() on the constituents. In this case the 2nd argument of ctor is the subjet alg radius.
In the MassCut and SmallSubjets mode the Qw is rescaled by a factor (Total Pt)/(Sum 3 subjets Pt).
- Author
- P-A Delsart
- Date
- April 2015
1.8.18