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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 | |
23 | kSPECIESN = 10 // Number of charged+neutral particle species recognized by the PHOS/EMCAL PID | |
24 | }; | |
25 | enum EParticleType { | |
26 | kElectron = 0, | |
27 | kMuon = 1, | |
28 | kPion = 2, | |
29 | kKaon = 3, | |
30 | kProton = 4, | |
31 | kPhoton = 5, | |
32 | kPi0 = 6, | |
33 | kNeutron = 7, | |
34 | kKaon0 = 8, | |
35 | kEleCon = 9, | |
36 | kUnknown = 10 | |
37 | }; | |
556e635b | 38 | static Float_t ParticleMass(Int_t iType) { |
39 | if(!fgkParticleMass[0]) Init(); | |
40 | return fgkParticleMass[iType]; | |
41 | } | |
304864ab | 42 | static const char* ParticleName(Int_t iType) |
43 | {return fgkParticleName[iType];}; | |
91dbd0dc | 44 | static const char* ParticleShortName(Int_t iType) |
45 | {return fgkParticleShortName[iType];}; | |
46 | static const char* ParticleLatexName(Int_t iType) | |
47 | {return fgkParticleLatexName[iType];}; | |
304864ab | 48 | static Int_t ParticleCode(Int_t iType) |
49 | {return fgkParticleCode[iType];}; | |
50 | ||
51 | AliPID(); | |
52 | AliPID(const Double_t* probDensity, Bool_t charged = kTRUE); | |
53 | AliPID(const Float_t* probDensity, Bool_t charged = kTRUE); | |
54 | AliPID(const AliPID& pid); | |
55 | AliPID& operator = (const AliPID& pid); | |
56 | ||
57 | Double_t GetProbability(EParticleType iType, | |
58 | const Double_t* prior) const; | |
59 | Double_t GetProbability(EParticleType iType) const; | |
60 | void GetProbabilities(Double_t* probabilities, | |
61 | const Double_t* prior) const; | |
62 | void GetProbabilities(Double_t* probabilities) const; | |
63 | EParticleType GetMostProbable(const Double_t* prior) const; | |
64 | EParticleType GetMostProbable() const; | |
65 | ||
3088e2dd | 66 | void SetProbabilities(const Double_t* probabilities, |
67 | Bool_t charged = kTRUE); | |
68 | ||
304864ab | 69 | static void SetPriors(const Double_t* prior, |
70 | Bool_t charged = kTRUE); | |
71 | static void SetPrior(EParticleType iType, Double_t prior); | |
72 | ||
304864ab | 73 | AliPID& operator *= (const AliPID& pid); |
74 | ||
75 | private: | |
a9bbb414 | 76 | |
556e635b | 77 | static void Init(); |
a9bbb414 | 78 | |
304864ab | 79 | Bool_t fCharged; // flag for charged/neutral |
80 | Double_t fProbDensity[kSPECIESN]; // probability densities | |
81 | static Double_t fgPrior[kSPECIESN]; // a priori probabilities | |
82 | ||
a9bbb414 | 83 | static /*const*/ Float_t fgkParticleMass[kSPECIESN+1]; // particle masses |
304864ab | 84 | static const char* fgkParticleName[kSPECIESN+1]; // particle names |
91dbd0dc | 85 | static const char* fgkParticleShortName[kSPECIESN+1]; // particle names |
86 | static const char* fgkParticleLatexName[kSPECIESN+1]; // particle names | |
304864ab | 87 | static const Int_t fgkParticleCode[kSPECIESN+1]; // particle codes |
88 | ||
91dbd0dc | 89 | ClassDef(AliPID, 2) // particle id probability densities |
304864ab | 90 | }; |
91 | ||
92 | ||
93 | AliPID operator * (const AliPID& pid1, const AliPID& pid2); | |
94 | ||
95 | ||
96 | #endif |