MC matching for tracks

[sarafiorendi]

need to check why, on a BKMuMu sample, kaon tracks never get matched to 321 but to other particles (313, 323, others)

[sarafiorendi]

ok, I think now I understand the logic (sorry for opening the issue), please correct me if I'm wrong:

• the variable ProbeTracks_genPartFlav represents the pdg ID (abs value) of the mother of the genParticle to which the reco track is matched;
• the genParticle to which the reco track is matched can only be a kaon or a pion because of the selection here, and its pdgId can be retrieved via "GenPart_pdgId[ProbeTracks_genPartIdx]"