add possibility for 5- and 6-body combinations (in ThOR)
add possibility for 5- and 6-body combinations.
examples of physics cases:
- Xi_bc+ -> J/psi D0 p+ K- pi+
- B_c+ -> J/psi pi+ pi+ pi+ pi- pi- (see LHCb-PAPER-2016-040)
potentially can think of 7- & 8- combinations, let's say B_c+ -> J/psi 7pi or Bs0 -> J/psi K+ K- 2(pi+ pi-).
Relies on change in Rec/Phys/ParticleCombiners/src/ParticleCombiner.cpp (merge request Rec!3271 (merged))
Edited by Ivan Polyakov