Identification of Diffraction or Quasi-Elastic

It is possible to know whether a track is produced by a quasi-elastic or diffractive process:

• In the Fritiof (FTF) string model: the method G4Track::GetCreatorModelID() returns 21350 for FTF quasi-elastic, and 21600 for FTF diffraction.

• Note that the Quark-Gluon-String (QGS) model does not have quasi-elastic interactions; however QGS-based physics lists utilise a dedicated quasi-elastic model and the tracks produced by this model are identified with the model-ID 21300; tracks produced by QGS are identified with the model-ID 22200 (without distinction between diffractive and Non-diffractive interactions).