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304864ab | 1 | #ifndef ALIPID_H |
2 | #define ALIPID_H | |
3 | ||
4 | /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
5 | * See cxx source for full Copyright notice */ | |
6 | ||
7 | /////////////////////////////////////////////////////////////////////////////// | |
8 | /// // | |
9 | /// particle id probability densities // | |
10 | /// // | |
11 | /////////////////////////////////////////////////////////////////////////////// | |
12 | ||
13 | /* $Id$ */ | |
14 | ||
15 | ||
16 | #include <TObject.h> | |
17 | ||
18 | ||
19 | class AliPID : public TObject { | |
20 | public: | |
21 | enum { | |
22 | kSPECIES = 5, // Number of particle species recognized by the PID | |
35f27279 | 23 | kSPECIESN = 10, // Number of charged+neutral particle species recognized by the PHOS/EMCAL PID |
24 | kSPECIESLN = 4 // Number of light nuclei: deuteron, triton, helium-3 and alpha | |
304864ab | 25 | }; |
26 | enum EParticleType { | |
27 | kElectron = 0, | |
28 | kMuon = 1, | |
29 | kPion = 2, | |
30 | kKaon = 3, | |
31 | kProton = 4, | |
32 | kPhoton = 5, | |
33 | kPi0 = 6, | |
34 | kNeutron = 7, | |
35 | kKaon0 = 8, | |
36 | kEleCon = 9, | |
35f27279 | 37 | kDeuteron = 10, |
38 | kTriton = 11, | |
39 | kHe3 = 12, | |
40 | kAlpha = 13, | |
41 | kUnknown = 14 | |
304864ab | 42 | }; |
556e635b | 43 | static Float_t ParticleMass(Int_t iType) { |
44 | if(!fgkParticleMass[0]) Init(); | |
45 | return fgkParticleMass[iType]; | |
46 | } | |
67376d1d | 47 | static Float_t ParticleMassZ(Int_t iType) { |
48 | if(!fgkParticleMass[0]) Init(); | |
49 | return fgkParticleMassZ[iType]; | |
50 | } | |
304864ab | 51 | static const char* ParticleName(Int_t iType) |
52 | {return fgkParticleName[iType];}; | |
91dbd0dc | 53 | static const char* ParticleShortName(Int_t iType) |
54 | {return fgkParticleShortName[iType];}; | |
55 | static const char* ParticleLatexName(Int_t iType) | |
56 | {return fgkParticleLatexName[iType];}; | |
304864ab | 57 | static Int_t ParticleCode(Int_t iType) |
58 | {return fgkParticleCode[iType];}; | |
59 | ||
60 | AliPID(); | |
61 | AliPID(const Double_t* probDensity, Bool_t charged = kTRUE); | |
62 | AliPID(const Float_t* probDensity, Bool_t charged = kTRUE); | |
63 | AliPID(const AliPID& pid); | |
64 | AliPID& operator = (const AliPID& pid); | |
65 | ||
66 | Double_t GetProbability(EParticleType iType, | |
67 | const Double_t* prior) const; | |
68 | Double_t GetProbability(EParticleType iType) const; | |
69 | void GetProbabilities(Double_t* probabilities, | |
70 | const Double_t* prior) const; | |
71 | void GetProbabilities(Double_t* probabilities) const; | |
72 | EParticleType GetMostProbable(const Double_t* prior) const; | |
73 | EParticleType GetMostProbable() const; | |
74 | ||
3088e2dd | 75 | void SetProbabilities(const Double_t* probabilities, |
76 | Bool_t charged = kTRUE); | |
77 | ||
304864ab | 78 | static void SetPriors(const Double_t* prior, |
79 | Bool_t charged = kTRUE); | |
80 | static void SetPrior(EParticleType iType, Double_t prior); | |
81 | ||
304864ab | 82 | AliPID& operator *= (const AliPID& pid); |
83 | ||
84 | private: | |
a9bbb414 | 85 | |
556e635b | 86 | static void Init(); |
a9bbb414 | 87 | |
304864ab | 88 | Bool_t fCharged; // flag for charged/neutral |
89 | Double_t fProbDensity[kSPECIESN]; // probability densities | |
90 | static Double_t fgPrior[kSPECIESN]; // a priori probabilities | |
91 | ||
35f27279 | 92 | static /*const*/ Float_t fgkParticleMass[kSPECIESN+kSPECIESLN+1]; // particle masses |
67376d1d | 93 | static /*const*/ Float_t fgkParticleMassZ[kSPECIESN+kSPECIESLN+1]; // particle masses/charge |
35f27279 | 94 | static const char* fgkParticleName[kSPECIESN+kSPECIESLN+1]; // particle names |
95 | static const char* fgkParticleShortName[kSPECIESN+kSPECIESLN+1]; // particle names | |
96 | static const char* fgkParticleLatexName[kSPECIESN+kSPECIESLN+1]; // particle names | |
97 | static const Int_t fgkParticleCode[kSPECIESN+kSPECIESLN+1]; // particle codes | |
304864ab | 98 | |
67376d1d | 99 | ClassDef(AliPID, 3) // particle id probability densities |
304864ab | 100 | }; |
101 | ||
102 | ||
103 | AliPID operator * (const AliPID& pid1, const AliPID& pid2); | |
104 | ||
105 | ||
106 | #endif |