#include <IndexedTConstituentUserInfo.h>
IndexedTConstituentUserInfo is an implementation of IConstituentUserInfo, i.e. it provides means to attach an aux element, label and vertex to a fastjet pseudojet.
To hold a particle (IParticle), use IndexedConstituentUserInfo.
The element is held by pointer, the label by index (along with a pointer to the label index to dedcode it), and the vertex is missing. The index 0 corresponds to no label and negative values indicate the constituent is a ghost, i.e. has very low energy and so has little effect on the jet four vector.
1.6.1
