[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
    kSPECIESLN = 4   // Number of light nuclei: deuteron, triton, helium-3 and alpha
  };
  enum EParticleType {
    kElectron = 0, 
    kMuon = 1, 
    kPion = 2, 
    kKaon = 3, 
    kProton = 4, 
    kPhoton = 5, 
    kPi0 = 6, 
    kNeutron = 7, 
    kKaon0 = 8, 
    kEleCon = 9,
    kDeuteron = 10,
    kTriton = 11,
    kHe3 = 12,
    kAlpha = 13,
    kUnknown = 14
  };
  static Float_t       ParticleMass(Int_t iType) {
     if(!fgkParticleMass[0]) Init(); 
     return fgkParticleMass[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[kSPECIESN];    // probability densities
  static Double_t      fgPrior[kSPECIESN];         // a priori probabilities

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

  ClassDef(AliPID, 2)    // 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
35f27279	23	kSPECIESN = 10, // Number of charged+neutral particle species recognized by the PHOS/EMCAL PID
35f27279	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)
304864ab	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