[u/mrichter/AliRoot.git] / STEER / STEERBase / AliPID.h

#ifndef ALIPID_H
#define ALIPID_H

/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 * See cxx source for full Copyright notice                               */

///////////////////////////////////////////////////////////////////////////////
///                                                                          //
/// particle id probability densities                                        //
///                                                                          //
///////////////////////////////////////////////////////////////////////////////

/* $Id$ */


#include <TObject.h>
#include <TMath.h>

class AliPID : public TObject {
 public:
  enum {
    kSPECIES = 5,     // Number of default particle species recognized by the PID
    kSPECIESC = 9,    // Number of default particles + light nuclei recognized by the PID
    kSPECIESCN = 14,  // Number of charged+neutral particle species recognized by the PHOS/EMCAL PID
  };
  enum EParticleType {
    kElectron = 0, 
    kMuon = 1, 
    kPion = 2, 
    kKaon = 3, 
    kProton = 4, 

    kDeuteron = 5,
    kTriton = 6,
    kHe3 = 7,
    kAlpha = 8,
    
    kPhoton = 9,
    kPi0 = 10, 
    kNeutron = 11, 
    kKaon0 = 12, 
    kEleCon = 13,
    
    kUnknown = 14
  };
  
  static Float_t       ParticleMass(Int_t iType) {
     if(!fgkParticleMass[0]) Init(); 
     return fgkParticleMass[iType];
  }
  static Float_t       ParticleMassZ(Int_t iType) {
     if(!fgkParticleMass[0]) Init(); 
     return fgkParticleMassZ[iType];
  }
  static Int_t         ParticleCharge(Int_t iType){
    if(!fgkParticleMass[0]) Init();
    if (iType<0||iType>=kSPECIESC) return 0;
    return TMath::Nint(fgkParticleMass[iType]/fgkParticleMassZ[iType]);
  }
  static const char*   ParticleName(Int_t iType) 
    {return fgkParticleName[iType];};
  static const char*   ParticleShortName(Int_t iType) 
    {return fgkParticleShortName[iType];};
  static const char*   ParticleLatexName(Int_t iType) 
    {return fgkParticleLatexName[iType];};
  static Int_t         ParticleCode(Int_t iType) 
    {return fgkParticleCode[iType];};

  AliPID();
  AliPID(const Double_t* probDensity, Bool_t charged = kTRUE);
  AliPID(const Float_t* probDensity, Bool_t charged = kTRUE);
  AliPID(const AliPID& pid);
  AliPID& operator = (const AliPID& pid);

  Double_t             GetProbability(EParticleType iType,
				      const Double_t* prior) const;
  Double_t             GetProbability(EParticleType iType) const;
  void                 GetProbabilities(Double_t* probabilities,
					const Double_t* prior) const;
  void                 GetProbabilities(Double_t* probabilities) const;
  EParticleType        GetMostProbable(const Double_t* prior) const;
  EParticleType        GetMostProbable() const;
  
  void                 SetProbabilities(const Double_t* probabilities,
                                        Bool_t charged = kTRUE);

  static void          SetPriors(const Double_t* prior,
				 Bool_t charged = kTRUE);
  static void          SetPrior(EParticleType iType, Double_t prior);

  AliPID&              operator *= (const AliPID& pid);

 private:

  static void          Init();

  Bool_t               fCharged;                           // flag for charged/neutral
  Double_t             fProbDensity[kSPECIESCN];           // probability densities
  static Double_t      fgPrior[kSPECIESCN];                // a priori probabilities

  static /*const*/ Float_t fgkParticleMass[kSPECIESCN+1];  // particle masses
  static /*const*/ Float_t fgkParticleMassZ[kSPECIESCN+1]; // particle masses/charge
  static const char*   fgkParticleName[kSPECIESCN+1];      // particle names
  static const char*   fgkParticleShortName[kSPECIESCN+1]; // particle names
  static const char*   fgkParticleLatexName[kSPECIESCN+1]; // particle names
  static const Int_t   fgkParticleCode[kSPECIESCN+1];      // particle codes

  ClassDef(AliPID, 3)                                      // particle id probability densities
};


AliPID operator * (const AliPID& pid1, const AliPID& pid2);


#endif
Commit	Line	Data
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>
00a38d07	17	#include <TMath.h>
304864ab	18
	19	class AliPID : public TObject {
	20	public:
	21	enum {
00a38d07	22	kSPECIES = 5, // Number of default particle species recognized by the PID
	23	kSPECIESC = 9, // Number of default particles + light nuclei recognized by the PID
	24	kSPECIESCN = 14, // Number of charged+neutral particle species recognized by the PHOS/EMCAL PID
304864ab	25	};
	26	enum EParticleType {
	27	kElectron = 0,
	28	kMuon = 1,
	29	kPion = 2,
	30	kKaon = 3,
	31	kProton = 4,
00a38d07	32
	33	kDeuteron = 5,
	34	kTriton = 6,
	35	kHe3 = 7,
	36	kAlpha = 8,
	37
	38	kPhoton = 9,
	39	kPi0 = 10,
	40	kNeutron = 11,
	41	kKaon0 = 12,
	42	kEleCon = 13,
	43
35f27279	44	kUnknown = 14
304864ab	45	};
00a38d07	46
556e635b	47	static Float_t ParticleMass(Int_t iType) {
	48	if(!fgkParticleMass[0]) Init();
	49	return fgkParticleMass[iType];
	50	}
67376d1d	51	static Float_t ParticleMassZ(Int_t iType) {
	52	if(!fgkParticleMass[0]) Init();
	53	return fgkParticleMassZ[iType];
	54	}
00a38d07	55	static Int_t ParticleCharge(Int_t iType){
	56	if(!fgkParticleMass[0]) Init();
	57	if (iType<0\|\|iType>=kSPECIESC) return 0;
	58	return TMath::Nint(fgkParticleMass[iType]/fgkParticleMassZ[iType]);
	59	}
304864ab	60	static const char* ParticleName(Int_t iType)
304864ab	61	{return fgkParticleName[iType];};
91dbd0dc	62	static const char* ParticleShortName(Int_t iType)
	63	{return fgkParticleShortName[iType];};
	64	static const char* ParticleLatexName(Int_t iType)
	65	{return fgkParticleLatexName[iType];};
304864ab	66	static Int_t ParticleCode(Int_t iType)
	67	{return fgkParticleCode[iType];};
	68
	69	AliPID();
	70	AliPID(const Double_t* probDensity, Bool_t charged = kTRUE);
	71	AliPID(const Float_t* probDensity, Bool_t charged = kTRUE);
	72	AliPID(const AliPID& pid);
	73	AliPID& operator = (const AliPID& pid);
	74
	75	Double_t GetProbability(EParticleType iType,
	76	const Double_t* prior) const;
	77	Double_t GetProbability(EParticleType iType) const;
	78	void GetProbabilities(Double_t* probabilities,
	79	const Double_t* prior) const;
	80	void GetProbabilities(Double_t* probabilities) const;
	81	EParticleType GetMostProbable(const Double_t* prior) const;
	82	EParticleType GetMostProbable() const;
	83
3088e2dd	84	void SetProbabilities(const Double_t* probabilities,
	85	Bool_t charged = kTRUE);
	86
304864ab	87	static void SetPriors(const Double_t* prior,
	88	Bool_t charged = kTRUE);
	89	static void SetPrior(EParticleType iType, Double_t prior);
	90
304864ab	91	AliPID& operator *= (const AliPID& pid);
	92
	93	private:
a9bbb414	94
556e635b	95	static void Init();
a9bbb414	96
00a38d07	97	Bool_t fCharged; // flag for charged/neutral
	98	Double_t fProbDensity[kSPECIESCN]; // probability densities
	99	static Double_t fgPrior[kSPECIESCN]; // a priori probabilities
304864ab	100
00a38d07	101	static /const/ Float_t fgkParticleMass[kSPECIESCN+1]; // particle masses
	102	static /const/ Float_t fgkParticleMassZ[kSPECIESCN+1]; // particle masses/charge
	103	static const char* fgkParticleName[kSPECIESCN+1]; // particle names
	104	static const char* fgkParticleShortName[kSPECIESCN+1]; // particle names
	105	static const char* fgkParticleLatexName[kSPECIESCN+1]; // particle names
	106	static const Int_t fgkParticleCode[kSPECIESCN+1]; // particle codes
304864ab	107
00a38d07	108	ClassDef(AliPID, 3) // particle id probability densities
304864ab	109	};
	110
	111
	112	AliPID operator * (const AliPID& pid1, const AliPID& pid2);
	113
	114
	115	#endif