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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 | } | |
304864ab | 47 | static const char* ParticleName(Int_t iType) |
48 | {return fgkParticleName[iType];}; | |
91dbd0dc | 49 | static const char* ParticleShortName(Int_t iType) |
50 | {return fgkParticleShortName[iType];}; | |
51 | static const char* ParticleLatexName(Int_t iType) | |
52 | {return fgkParticleLatexName[iType];}; | |
304864ab | 53 | static Int_t ParticleCode(Int_t iType) |
54 | {return fgkParticleCode[iType];}; | |
55 | ||
56 | AliPID(); | |
57 | AliPID(const Double_t* probDensity, Bool_t charged = kTRUE); | |
58 | AliPID(const Float_t* probDensity, Bool_t charged = kTRUE); | |
59 | AliPID(const AliPID& pid); | |
60 | AliPID& operator = (const AliPID& pid); | |
61 | ||
62 | Double_t GetProbability(EParticleType iType, | |
63 | const Double_t* prior) const; | |
64 | Double_t GetProbability(EParticleType iType) const; | |
65 | void GetProbabilities(Double_t* probabilities, | |
66 | const Double_t* prior) const; | |
67 | void GetProbabilities(Double_t* probabilities) const; | |
68 | EParticleType GetMostProbable(const Double_t* prior) const; | |
69 | EParticleType GetMostProbable() const; | |
70 | ||
3088e2dd | 71 | void SetProbabilities(const Double_t* probabilities, |
72 | Bool_t charged = kTRUE); | |
73 | ||
304864ab | 74 | static void SetPriors(const Double_t* prior, |
75 | Bool_t charged = kTRUE); | |
76 | static void SetPrior(EParticleType iType, Double_t prior); | |
77 | ||
304864ab | 78 | AliPID& operator *= (const AliPID& pid); |
79 | ||
80 | private: | |
a9bbb414 | 81 | |
556e635b | 82 | static void Init(); |
a9bbb414 | 83 | |
304864ab | 84 | Bool_t fCharged; // flag for charged/neutral |
85 | Double_t fProbDensity[kSPECIESN]; // probability densities | |
86 | static Double_t fgPrior[kSPECIESN]; // a priori probabilities | |
87 | ||
35f27279 | 88 | static /*const*/ Float_t fgkParticleMass[kSPECIESN+kSPECIESLN+1]; // particle masses |
89 | static const char* fgkParticleName[kSPECIESN+kSPECIESLN+1]; // particle names | |
90 | static const char* fgkParticleShortName[kSPECIESN+kSPECIESLN+1]; // particle names | |
91 | static const char* fgkParticleLatexName[kSPECIESN+kSPECIESLN+1]; // particle names | |
92 | static const Int_t fgkParticleCode[kSPECIESN+kSPECIESLN+1]; // particle codes | |
304864ab | 93 | |
577d7a0f | 94 | ClassDef(AliPID, 2) // particle id probability densities |
304864ab | 95 | }; |
96 | ||
97 | ||
98 | AliPID operator * (const AliPID& pid1, const AliPID& pid2); | |
99 | ||
100 | ||
101 | #endif |