2 // Class AliRsnDaughter
4 // Interface to candidate daughters of a resonance (tracks).
5 // Points to the source of information, which is generally an AliVParticle-derived object
6 // and contains few internal data-members to store "on fly" some important information
7 // for the computations required during resonance analysis.
9 // Since the package revision, this object is not supposed to be stacked in memory
10 // but created "on fly" during analysis and used just for computations, as an interface.
12 // authors: A. Pulvirenti (alberto.pulvirenti@ct.infn.it)
13 // M. Vala (martin.vala@cern.ch)
16 #ifndef ALIRSNDAUGHTER_H
17 #define ALIRSNDAUGHTER_H
19 #include <TLorentzVector.h>
21 #include "AliESDtrack.h"
22 #include "AliAODTrack.h"
25 #include "AliMCParticle.h"
26 #include "AliAODMCParticle.h"
28 typedef AliPID::EParticleType EPARTYPE;
30 class AliRsnDaughter : public TObject
42 AliRsnDaughter(const AliRsnDaughter ©);
43 virtual ~AliRsnDaughter();
44 AliRsnDaughter& operator= (const AliRsnDaughter& copy);
48 void Print(Option_t* const option = "") const;
51 Bool_t IsOK() const {return fOK;}
52 Int_t GetLabel() const {return fLabel;}
53 Int_t GetPDG(Bool_t abs = kTRUE) const;
54 Int_t GetMotherPDG() const {return fMotherPDG;}
56 Bool_t HasFlag(ULong_t flag) const;
57 void SetBad() {fOK = kFALSE;}
58 void SetGood() {fOK = kTRUE;}
59 void SetLabel(Int_t label) {fLabel = label;}
60 void SetMotherPDG(Int_t value) {fMotherPDG = value;}
63 TLorentzVector& P(Bool_t mc = kFALSE) {return (mc ? fPMC : fP);}
64 TLorentzVector& Prec() {return fP;}
65 TLorentzVector& Psim() {return fPMC;}
66 Bool_t SetMass(Double_t mass);
69 Bool_t IsPos() const {return (fRef->Charge() > 0);}
70 Bool_t IsNeg() const {return (fRef->Charge() < 0);}
71 Bool_t IsNeutral() const {return (!IsPos() && !IsNeg());}
72 Bool_t IsSign(Char_t sign) const {if (sign=='+') return IsPos(); else if (sign=='-') return IsNeg(); else return IsNeutral();}
73 Short_t Charge() const {if (IsPos()) return 1 ; else if (IsNeg()) return -1 ; else return 0 ;}
74 Char_t ChargeChar() const {if (IsPos()) return '+'; else if (IsNeg()) return '-'; else return '0';}
76 // getters which automatically convert refs into allowed types
77 AliVParticle* GetRef() const {return fRef;}
78 AliVParticle* GetRefMC() const {return fRefMC;}
79 AliMCParticle* GetRefMCtrack() const {return dynamic_cast<AliMCParticle*>(fRef);}
80 AliESDtrack* GetRefESDtrack() const {return dynamic_cast<AliESDtrack*>(fRef);}
81 AliAODTrack* GetRefAODtrack() const {return dynamic_cast<AliAODTrack*>(fRef);}
82 AliESDv0* GetRefESDv0() const {return dynamic_cast<AliESDv0*>(fRef);}
83 AliAODv0* GetRefAODv0() const {return dynamic_cast<AliAODv0*>(fRef);}
84 AliMCParticle* GetRefMCESD() const {return dynamic_cast<AliMCParticle*>(fRefMC);}
85 AliAODMCParticle* GetRefMCAOD() const {return dynamic_cast<AliAODMCParticle*>(fRefMC);}
86 Bool_t IsMC() const {if (GetRefMCtrack()) return kTRUE; return kFALSE;}
87 Bool_t IsAOD() const {if (GetRefAODtrack() || GetRefAODv0()) return kTRUE; return kFALSE;}
88 Bool_t IsESD() const {if (GetRefESDtrack() || GetRefESDv0()) return kTRUE; return kFALSE;}
89 Bool_t IsTrack() const {if (GetRefESDtrack() || GetRefAODtrack() || GetRefMCtrack()) return kTRUE; return kFALSE;}
90 Bool_t IsV0() const {if (GetRefESDv0() || GetRefAODv0()) return kTRUE; return kFALSE;}
91 ERefType RefType() const {if (IsTrack()) return kTrack; if (IsV0()) return kV0; return kNoType;}
92 void SetRef(AliVParticle *ref) {fRef = ref;}
93 void SetRefMC(AliVParticle *refMC) {fRefMC = refMC;}
97 Bool_t fOK; // internal utility flag which is kFALSE when this object should not be used
98 Int_t fLabel; // GEANT label of corresponding MC (not trivial for V0s)
99 Int_t fMotherPDG; // PDG code of mother (makes sense only if fRefMC is defined)
101 TLorentzVector fP; // 4-vector filled with track info from default ref (if present)
102 TLorentzVector fPMC; // 4-vector filled with track info from MC ref (if present)
104 AliVParticle *fRef; // reference to reconstructed track in ESD/AOD
105 AliVParticle *fRefMC; // reference to corresponding MC particle
107 ClassDef(AliRsnDaughter, 8)