Merge new MCTruthClassifier developments into master

Defined a new function which checks for hadron/tau/BSM/Geant/uncategorised origin and returns the output as a bitset. Individual digits of the bitset are decorated into branches corresponding to above-mentioned classes.

SuperSimplifiedTruthClassifier(SSTC) classification scheme:

The following boolean flags are used:

• fromGeant: the particle originates in a nuclear interaction or not [1/0].
• uncat: HEPMC production vertex not found / found [1/0].
• isBSM: the particle itself is a BSM particle or not [1/0].
• fromBSM: there is a BSM particle in the ancestor chain or not [1/0]. Usual caveats apply.
• fromhad: there is a hadron in the ancestor chain or not [1/0].
• fromTau: there is a tau lepton in the ancestor chain or not [1/0].
• isHadTau: there is a tau lepton with a hadronic mother in the ancestor chain or not [1/0].

Validity of the booleans

	fromGeant	uncat	isBSM	fromBSM	fromhad	fromtau	isHadTau
fromGeant	-	X	X	X	X	X	X
uncat	X	-	X	X	X	X	X
isBSM	X	X	-	Y*	Y	Y	Y
fromBSM	X	X	X	-	Y	Y	Y
fromhad	X	X	Y	Y	-	Y	Y
fromtau	X	X	X	Y	Y	-	Y
isHadTau	X	X	X	X	Y**	Y	-

(*) If a particle is BSM and also has another BSM particle in the ancestor chain, then both isBSM & fromBSM flags are switched on.

(**) Example Chain: Hadron -> Tau -> Hadron -> final particle

Output

Runs only on truthparticles, which are leptons or photons or BSM now. Creates the 7 branches mentioned above. SSTC function runs in parallel with the original MCTC functions.

Contact

Sukanya Sinha (sukanya.sinha@cern.ch)