4 // Defines a decay channel for a resonance,
5 // resulting in a specified PDG code for the mother,
6 // and the particle type for the daughters, defined
7 // according to the internal PID format of the package
9 // author: A. Pulvirenti (alberto.pulvirenti@ct.infn.it)
12 #ifndef ALIRSNPAIRDEF_H
13 #define ALIRSNPAIRDEF_H
19 class AliRsnPairDef : public TObject
24 AliRsnPairDef(Char_t sign1, AliPID::EParticleType type1,
25 Char_t sign2, AliPID::EParticleType type2, Int_t motherPDG = 0);
26 AliRsnPairDef(AliPID::EParticleType type1, Char_t sign1,
27 AliPID::EParticleType type2, Char_t sign2, Int_t motherPDG = 0);
28 AliRsnPairDef(const AliRsnPairDef ©);
29 const AliRsnPairDef& operator= (const AliRsnPairDef ©);
30 virtual ~AliRsnPairDef() { }
33 Char_t GetCharge(Int_t i) const {if (i>=0&&i<2) return fCharge[i]; else return 0;}
34 Short_t GetChargeShort(Int_t i) const {if (GetCharge(i) == '+') return 1; else if (GetCharge(i) == '-') return -1; else return 0;}
35 AliPID::EParticleType GetType(Int_t i) const {if (i>=0&&i<2) return fType[i]; else return AliPID::kUnknown;}
36 Double_t GetMass(Int_t i) const {if (i>=0&&i<2) return fMass[i]; else return 0.0;}
37 Int_t GetMotherPDG() const {return fMotherPDG;}
38 TString GetPairName() const;
41 Bool_t SetPairElement(Int_t i, Char_t charge, AliPID::EParticleType pid);
42 Bool_t SetPair(Char_t ch1, AliPID::EParticleType pid1, Char_t ch2, AliPID::EParticleType pid2);
43 void SetMotherPDG(Int_t pdg) {fMotherPDG = pdg;}
45 // pair information methods
46 Bool_t IsLikeSign() const {return (fCharge[0] == fCharge[1]);}
47 Bool_t HasEqualTypes() const {return (fType[0] == fType[1]);}
52 Int_t fMotherPDG; // PDG code of true mother (if known)
53 Double_t fMass[2]; // mass of particles
54 Char_t fCharge[2]; // charge of particles
55 AliPID::EParticleType fType[2]; // PID of particles
58 ClassDef(AliRsnPairDef, 1)