[u/mrichter/AliRoot.git] / STEER / 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>


class AliPID : public TObject {
 public:
  enum {
    kSPECIES = 5,    // Number of particle species recognized by the PID
    kSPECIESN = 10   // Number of charged+neutral particle species recognized by the PHOS/EMCAL PID
  };
  enum EParticleType {
    kElectron = 0, 
    kMuon = 1, 
    kPion = 2, 
    kKaon = 3, 
    kProton = 4, 
    kPhoton = 5, 
    kPi0 = 6, 
    kNeutron = 7, 
    kKaon0 = 8, 
    kEleCon = 9,
    kUnknown = 10
  };
  static Float_t       ParticleMass(Int_t iType) 
    {return fgkParticleMass[iType];};
  static const char*   ParticleName(Int_t iType) 
    {return fgkParticleName[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;
  
  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:

  void                 Init();

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

  static /*const*/ Float_t fgkParticleMass[kSPECIESN+1]; // particle masses
  static const char*   fgkParticleName[kSPECIESN+1]; // particle names
  static const Int_t   fgkParticleCode[kSPECIESN+1]; // particle codes

  ClassDef(AliPID, 1)    // 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>
	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	};
	38	static Float_t ParticleMass(Int_t iType)
	39	{return fgkParticleMass[iType];};
	40	static const char* ParticleName(Int_t iType)
	41	{return fgkParticleName[iType];};
	42	static Int_t ParticleCode(Int_t iType)
	43	{return fgkParticleCode[iType];};
	44
	45	AliPID();
	46	AliPID(const Double_t* probDensity, Bool_t charged = kTRUE);
	47	AliPID(const Float_t* probDensity, Bool_t charged = kTRUE);
	48	AliPID(const AliPID& pid);
	49	AliPID& operator = (const AliPID& pid);
	50
	51	Double_t GetProbability(EParticleType iType,
	52	const Double_t* prior) const;
	53	Double_t GetProbability(EParticleType iType) const;
	54	void GetProbabilities(Double_t* probabilities,
	55	const Double_t* prior) const;
	56	void GetProbabilities(Double_t* probabilities) const;
	57	EParticleType GetMostProbable(const Double_t* prior) const;
	58	EParticleType GetMostProbable() const;
	59
	60	static void SetPriors(const Double_t* prior,
	61	Bool_t charged = kTRUE);
	62	static void SetPrior(EParticleType iType, Double_t prior);
	63
304864ab	64	AliPID& operator *= (const AliPID& pid);
	65
	66	private:
a9bbb414	67
	68	void Init();
	69
304864ab	70	Bool_t fCharged; // flag for charged/neutral
	71	Double_t fProbDensity[kSPECIESN]; // probability densities
	72	static Double_t fgPrior[kSPECIESN]; // a priori probabilities
	73
a9bbb414	74	static /const/ Float_t fgkParticleMass[kSPECIESN+1]; // particle masses
304864ab	75	static const char* fgkParticleName[kSPECIESN+1]; // particle names
	76	static const Int_t fgkParticleCode[kSPECIESN+1]; // particle codes
	77
	78	ClassDef(AliPID, 1) // particle id probability densities
	79	};
	80
	81
	82	AliPID operator * (const AliPID& pid1, const AliPID& pid2);
	83
	84
	85	#endif