[u/mrichter/AliRoot.git] / EMCAL / AliEMCALPID.cxx

/**************************************************************************
 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 *                                                                        *
 * Author: The ALICE Off-line Project.                                    *
 * Contributors are mentioned in the code where appropriate.              *
 *                                                                        *
 * Permission to use, copy, modify and distribute this software and its   *
 * documentation strictly for non-commercial purposes is hereby granted   *
 * without fee, provided that the above copyright notice appears in all   *
 * copies and that both the copyright notice and this permission notice   *
 * appear in the supporting documentation. The authors make no claims     *
 * about the suitability of this software for any purpose. It is          *
 * provided "as is" without express or implied warranty.                  *
 **************************************************************************/

/* $Id$ */
/* History of cvs commits:
 *
 * $Log$
 * Revision 1.15  2007/10/09 08:46:10  hristov
 * The data members fEMCALClusterCluster and fPHOSCluster are removed from AliESDCaloCluster, the fClusterType is used to select PHOS or EMCAL clusters. Changes, needed to use correctly the new AliESDCaloCluster. (Christian)
 *
 * Revision 1.14  2007/07/26 16:54:53  morsch
 * Changes in AliESDEvent fwd declarartions.
 *
 * Revision 1.13  2007/07/11 13:43:29  hristov
 * New class AliESDEvent, backward compatibility with the old AliESD (Christian)
 *
 * Revision 1.12  2007/06/11 20:43:06  hristov
 * Changes required by the updated AliESDCaloCluster (Gustavo)
 *
 * Revision 1.11  2007/03/30 13:50:34  gustavo
 * PID for particles with E < 5 GeV was not done, temporal solution found (Guenole)
 *
 * Revision 1.10  2007/03/09 14:34:11  gustavo
 * Correct probability calculation, added missing initialization of data members
 *
 * Revision 1.9  2007/02/20 20:17:43  hristov
 * Corrected array size, removed warnings (icc)
 *
 * Revision 1.8  2006/12/19 08:49:35  gustavo
 * New PID class for EMCAL, bayesian analysis done with ESD data, PID information filled when calling AliEMCALPID in AliEMCALReconstructor::FillESD()
 *
 *
 */
//    to compute PID for all the clusters in ESDs.root file
//     the ESDs.root have to be in the same directory as the class
//
//
//
//
//
//	AliEMCALPID::CalculPID(Energy,Lambda0)
//	  Calcul PID for all clusters in AliESDs.root file
//	  keep this function for the moment for a simple verification, could be removed
//
//
//
//   AliEMCALPID::CalculPID(Energy,Lambda0)
//    calcul PID Weght for a cluster with Energy, Lambda0 .
//    Double_t PIDFinal[AliPID::kSPECIESN]  is the standard PID for :
//
//
//
//	kElectron :  fPIDFinal[0]
//	kMuon     :  fPIDFinal[1]
//	kPion	  :  fPIDFinal[2]
//	kKaon	  :  fPIDFinal[3]
//	kProton   :  fPIDFinal[4]
//	kPhoton   :  fPIDFinal[5]
//	kPi0	  :  fPIDFinal[6]
//	kNeutron  :  fPIDFinal[7]
//	kKaon0	  :  fPIDFinal[8]
//	kEleCon   :  fPIDFinal[9]
//	kUnknown  :  fPIDFinal[10]
//
//
//    PID[3] is a simple PID for
//      Electron & Photon  PID[0]
//	              Pi0  PID[1]
//		   Hadron  PID[2]
//
//  
//
//
//
// --- ROOT system ---

// standard C++ includes
#include <Riostream.h>
// #include <cstdlib>
// #include <cmath>

// ROOT includes
#include "TTree.h"
#include "TStyle.h"
#include "TVector3.h"
#include "TBranch.h"
#include "TClonesArray.h"
#include "TCanvas.h"
#include "TLorentzVector.h"
#include "TMath.h"
#include "TFile.h"
#include "TH1.h"
#include "TH2.h"
#include "TParticle.h"

// // STEER includes
// #include "AliRun.h"
// #include "AliRunLoader.h"
// #include "AliHeader.h"
// #include "AliLoader.h"
// #include "AliStack.h"
// #include "AliESDtrack.h"
// #include "AliESDEvent.h"
#include "AliLog.h"
#include "AliEMCALPID.h"
#include "AliESDCaloCluster.h"
#include "AliEMCALRecParam.h"
#include "AliEMCALReconstructor.h"

  
ClassImp(AliEMCALPID)

//______________________________________________
  AliEMCALPID::AliEMCALPID():
    fPrintInfo(kFALSE), fProbGamma(0.),fProbPiZero(0.),fProbHadron(0.),fReconstructor(kFALSE)
{
  //
  // Constructor.
  // Initialize all constant values which have to be used
  // during PID algorithm execution
  //
  
  // set flag for printing to FALSE by default
  fPrintInfo = kFALSE;

  fPIDWeight[0] = -1;
  fPIDWeight[1] = -1;
  fPIDWeight[2] = -1;
  fReconstructor = kFALSE;

 const AliEMCALRecParam* recParam = AliEMCALReconstructor::GetRecParam();
if(!recParam) {
    AliFatal("Reconstruction parameters for EMCAL not set!");
  }
  else {
	for(Int_t i=0; i<6; i++){
		for(Int_t j=0; i<6; i++){
		fGamma[i][j] = recParam->GetGamma(i,j);
		fHadron[i][j] = recParam->GetHadron(i,j);
		fPiZero5to10[i][j] = recParam->GetPiZero5to10(i,j);
		fPiZero10to60[i][j] = recParam->GetPiZero10to60(i,j);
		AliDebug(1,Form("PID parameters: fGamma=%.3f, fPi=%.3f, fHAdron=%.3f",
				fGamma[1][1],fPiZero5to10[1][1],fHadron[1][1] ));
		}
	}

  }


}

//______________________________________________
void AliEMCALPID::RunPID(AliESDEvent *esd)
{
//
// Make the PID for all the EMCAL clusters containedin the ESDs File
// but just gamma/PiO/Hadron
//
	// trivial check against NULL object passed

  if (esd == 0x0) {
    AliInfo("NULL ESD object passed !!" );
    return ;
  }

  Int_t nClusters = esd->GetNumberOfEMCALClusters();
  Int_t firstCluster = esd->GetFirstEMCALCluster();
  Double_t energy, lambda0;
  for (Int_t iCluster = firstCluster; iCluster < (nClusters + firstCluster); iCluster++) {

    AliESDCaloCluster *clust = esd->GetCaloCluster(iCluster);
    energy = clust->E();
    lambda0 = clust->GetM02();
    // verify cluster type
    Int_t clusterType= clust->GetClusterType();
    if (clusterType == AliESDCaloCluster::kEMCALClusterv1 && lambda0 != 0  && energy < 1000) {


      // reject clusters with lambda0 = 0


      ComputePID(energy, lambda0);


      if (fPrintInfo) {
	AliInfo("___________________________________________________");
	AliInfo(Form( "Particle Energy = %f",energy));
	AliInfo(Form( "Particle Lambda0 of the particle = %f", lambda0) );
	AliInfo("PIDWeight of the particle :" );
	AliInfo(Form( " GAMMA  : %f",fPID[0] ));
	AliInfo(Form( " PiZero : %f",fPID[1] ));
	AliInfo(Form( " HADRON : %f", fPID[2] ));
	AliInfo("_________________________________________");
	AliInfo(Form( " kElectron : %f", fPIDFinal[0]) );
	AliInfo(Form( " kMuon     : %f", fPIDFinal[1] ));
	AliInfo(Form( " kPion	    : %f", fPIDFinal[2] ));
	AliInfo(Form( " kKaon	    : %f", fPIDFinal[3] ));
	AliInfo(Form( " kProton   : %f", fPIDFinal[4] ));
	AliInfo(Form( " kPhoton   : %f", fPIDFinal[5] ));
	AliInfo(Form( " kPi0	    : %f", fPIDFinal[6] ));
	AliInfo(Form( " kNeutron  : %f", fPIDFinal[7] ));
	AliInfo(Form( " kKaon0	: %f", fPIDFinal[8] ));
	AliInfo(Form( " kEleCon   : %f", fPIDFinal[9] ));
	AliInfo(Form( " kUnknown  : %f", fPIDFinal[10] ));
	AliInfo("___________________________________________________");
      }

      if(fReconstructor) // In case it is called during reconstruction.
	clust->SetPid(fPIDFinal);
    } // end if (clusterType...)
  } // end for (iCluster...)
}

//__________________________________________________________
void AliEMCALPID::ComputePID(Double_t energy, Double_t lambda0)
{
//
// This is the main command, which uses the distributions computed and parametrised, 
// and gives the PID by the bayesian method.
//

if (energy<5){energy =6;}


  TArrayD paramDistribGamma  = DistLambda0(energy, 1);
  TArrayD paramDistribPiZero = DistLambda0(energy, 2);
  TArrayD paramDistribHadron = DistLambda0(energy, 3);
  
  Bool_t norm = kFALSE;
  
  fProbGamma   = TMath::Gaus(lambda0, paramDistribGamma[1], paramDistribGamma[2], norm) * paramDistribGamma[0];
  fProbGamma  += TMath::Landau(lambda0, paramDistribGamma[4], paramDistribGamma[5], norm) * paramDistribGamma[3];
  fProbPiZero  = TMath::Gaus(lambda0, paramDistribPiZero[1], paramDistribPiZero[2], norm) * paramDistribPiZero[0];
  fProbPiZero += TMath::Landau(lambda0, paramDistribPiZero[4], paramDistribPiZero[5], norm) * paramDistribPiZero[3];
  fProbHadron  = TMath::Gaus(lambda0, paramDistribHadron[1], paramDistribHadron[2], norm) * paramDistribHadron[0];
  fProbHadron += TMath::Landau(lambda0, paramDistribHadron[4], paramDistribHadron[5], norm) * paramDistribHadron[3];
  
  // compute PID Weight
  fPIDWeight[0] = fProbGamma / (fProbGamma + fProbPiZero + fProbHadron);
  fPIDWeight[1] = fProbPiZero / (fProbGamma+fProbPiZero+fProbHadron);
  fPIDWeight[2] = fProbHadron / (fProbGamma+fProbPiZero+fProbHadron);
  
  SetPID(fPIDWeight[0], 0);
  SetPID(fPIDWeight[1], 1);
  SetPID(fPIDWeight[2], 2);
  
  // sortie ecran pid Weight only for control (= in english ???)
  if (fPrintInfo) {
    AliInfo(Form( "Energy in loop = %f", energy) );
    AliInfo(Form( "Lambda0 in loop = %f", lambda0) );
    AliInfo(Form( "fProbGamma in loop = %f", fProbGamma) );
    //	AliInfo(Form( "fParametresDistribGamma[2] = %f", fParamDistribGamma[2]) );
    AliInfo(Form( "fProbaPiZero = %f", fProbPiZero ));
    AliInfo(Form( "fProbaHadron = %f", fProbHadron) );
    AliInfo(Form( "PIDWeight in loop = %f ||| %f ||| %f",  fPIDWeight[0] , fPIDWeight[1], fPIDWeight[2]) );
    AliInfo(Form( "fGamma[2][2] = %f", fGamma[2][2] ));
    AliInfo("********************************************************" );
  }
  
  fPIDFinal[0]  = fPIDWeight[0]/2;
  fPIDFinal[1]  = fPIDWeight[2]/8;
  fPIDFinal[2]  = fPIDWeight[2]/8;
  fPIDFinal[3]  = fPIDWeight[2]/8;
  fPIDFinal[4]  = fPIDWeight[2]/8;
  fPIDFinal[5]  = fPIDWeight[0]/2;
  fPIDFinal[6]  = fPIDWeight[1]  ;
  fPIDFinal[7]  = fPIDWeight[2]/8;
  fPIDFinal[8]  = fPIDWeight[2]/8;
  fPIDFinal[9]  = fPIDWeight[2]/8;
  fPIDFinal[10] = fPIDWeight[2]/8;
}

//________________________________________________________
TArrayD AliEMCALPID::DistLambda0(Double_t energy, Int_t type)
{
  //
  // Compute the values of the parametrised distributions using the data initialised before.
  //
  Double_t constGauss = 0., meanGauss = 0., sigmaGauss = 0.;
  Double_t constLandau=0., mpvLandau=0., sigmaLandau=0.;
  TArrayD  distributionParam(6);
  
  switch (type) {
  case 1:
    constGauss  = Polynomial(energy, fGamma[0]);
    meanGauss   = Polynomial(energy, fGamma[1]);
    sigmaGauss  = Polynomial(energy, fGamma[2]);
    constLandau = Polynomial(energy, fGamma[3]);
    mpvLandau   = Polynomial(energy, fGamma[4]);
    sigmaLandau = Polynomial(energy, fGamma[5]);
    break;
  case 2:
    if (energy < 10) {
      constGauss  = Polynomial(energy, fPiZero5to10[0]);
      meanGauss   = Polynomial(energy, fPiZero5to10[1]);
      sigmaGauss  = Polynomial(energy, fPiZero5to10[2]);
      constLandau = Polynomial(energy, fPiZero5to10[3]);
      mpvLandau   = Polynomial(energy, fPiZero5to10[4]);
      sigmaLandau = Polynomial(energy, fPiZero5to10[5]);
    }
    else {
      constGauss  = Polynomial(energy, fPiZero10to60[0]);
      meanGauss   = Polynomial(energy, fPiZero10to60[1]);
      sigmaGauss  = Polynomial(energy, fPiZero10to60[2]);
      constLandau = Polynomial(energy, fPiZero10to60[3]);
      mpvLandau   = Polynomial(energy, fPiZero10to60[4]);
      sigmaLandau = Polynomial(energy, fPiZero10to60[5]);
    }
    break;
  case 3:
    constGauss  = Polynomial(energy, fHadron[0]);
    meanGauss   = Polynomial(energy, fHadron[1]);
    sigmaGauss  = Polynomial(energy, fHadron[2]);
    constLandau = Polynomial(energy, fHadron[3]);
    mpvLandau   = Polynomial(energy, fHadron[4]);
    sigmaLandau = Polynomial(energy, fHadron[5]);
    break;
  }
  
  distributionParam[0] = constGauss;
  distributionParam[1] = meanGauss;
  distributionParam[2] = sigmaGauss;
  distributionParam[3] = constLandau;
  distributionParam[4] = mpvLandau;
  distributionParam[5] = sigmaLandau;
  
  return distributionParam;
}

//_______________________________________________________
Double_t AliEMCALPID::Polynomial(Double_t x, Double_t *params)
{
  //
  // Compute a polynomial for a given value of 'x'
  // with the array of parameters passed as the second arg
  //
  Double_t y;
  y  = params[0];
  y += params[1] * x;
  y += params[2] * x * x;
  y += params[3] * x * x * x;
  y += params[4] * x * x * x * x;
  y += params[5] * x * x * x * x * x;
  
  return y;
}
Commit	Line	Data
dc293ae9	1	/**************************************************************************
	2	* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
	3	* *
	4	* Author: The ALICE Off-line Project. *
	5	* Contributors are mentioned in the code where appropriate. *
	6	* *
	7	* Permission to use, copy, modify and distribute this software and its *
	8	* documentation strictly for non-commercial purposes is hereby granted *
	9	* without fee, provided that the above copyright notice appears in all *
	10	* copies and that both the copyright notice and this permission notice *
	11	* appear in the supporting documentation. The authors make no claims *
	12	* about the suitability of this software for any purpose. It is *
	13	* provided "as is" without express or implied warranty. *
	14	**************************************************************************/
	15
	16	/* $Id$ */
	17	/* History of cvs commits:
	18	*
	19	* $Log$
8ba062b1	20	* Revision 1.15 2007/10/09 08:46:10 hristov
	21	* The data members fEMCALClusterCluster and fPHOSCluster are removed from AliESDCaloCluster, the fClusterType is used to select PHOS or EMCAL clusters. Changes, needed to use correctly the new AliESDCaloCluster. (Christian)
	22	*
8ada0ffe	23	* Revision 1.14 2007/07/26 16:54:53 morsch
	24	* Changes in AliESDEvent fwd declarartions.
	25	*
89ffc0b0	26	* Revision 1.13 2007/07/11 13:43:29 hristov
	27	* New class AliESDEvent, backward compatibility with the old AliESD (Christian)
	28	*
af885e0f	29	* Revision 1.12 2007/06/11 20:43:06 hristov
	30	* Changes required by the updated AliESDCaloCluster (Gustavo)
	31	*
7592dfc4	32	* Revision 1.11 2007/03/30 13:50:34 gustavo
	33	* PID for particles with E < 5 GeV was not done, temporal solution found (Guenole)
	34	*
4ce73a00	35	* Revision 1.10 2007/03/09 14:34:11 gustavo
	36	* Correct probability calculation, added missing initialization of data members
	37	*
4cfd8ef9	38	* Revision 1.9 2007/02/20 20:17:43 hristov
	39	* Corrected array size, removed warnings (icc)
	40	*
d69ab345	41	* Revision 1.8 2006/12/19 08:49:35 gustavo
	42	* New PID class for EMCAL, bayesian analysis done with ESD data, PID information filled when calling AliEMCALPID in AliEMCALReconstructor::FillESD()
	43	*
dc293ae9	44	*
	45	*/
	46	// to compute PID for all the clusters in ESDs.root file
	47	// the ESDs.root have to be in the same directory as the class
	48	//
	49	//
	50	//
	51	//
	52	//
	53	// AliEMCALPID::CalculPID(Energy,Lambda0)
	54	// Calcul PID for all clusters in AliESDs.root file
	55	// keep this function for the moment for a simple verification, could be removed
	56	//
	57	//
	58	//
	59	// AliEMCALPID::CalculPID(Energy,Lambda0)
	60	// calcul PID Weght for a cluster with Energy, Lambda0 .
	61	// Double_t PIDFinal[AliPID::kSPECIESN] is the standard PID for :
	62	//
	63	//
	64	//
	65	// kElectron : fPIDFinal[0]
	66	// kMuon : fPIDFinal[1]
	67	// kPion : fPIDFinal[2]
	68	// kKaon : fPIDFinal[3]
	69	// kProton : fPIDFinal[4]
	70	// kPhoton : fPIDFinal[5]
	71	// kPi0 : fPIDFinal[6]
	72	// kNeutron : fPIDFinal[7]
	73	// kKaon0 : fPIDFinal[8]
	74	// kEleCon : fPIDFinal[9]
	75	// kUnknown : fPIDFinal[10]
	76	//
	77	//
	78	// PID[3] is a simple PID for
	79	// Electron & Photon PID[0]
	80	// Pi0 PID[1]
	81	// Hadron PID[2]
	82	//
	83	//
	84	//
	85	//
	86	//
	87	// --- ROOT system ---
	88
	89	// standard C++ includes
	90	#include <Riostream.h>
	91	// #include <cstdlib>
	92	// #include <cmath>
	93
	94	// ROOT includes
	95	#include "TTree.h"
	96	#include "TStyle.h"
	97	#include "TVector3.h"
	98	#include "TBranch.h"
	99	#include "TClonesArray.h"
	100	#include "TCanvas.h"
	101	#include "TLorentzVector.h"
	102	#include "TMath.h"
	103	#include "TFile.h"
	104	#include "TH1.h"
	105	#include "TH2.h"
	106	#include "TParticle.h"
	107
108	// // STEER includes
109	// #include "AliRun.h"
110	// #include "AliRunLoader.h"
111	// #include "AliHeader.h"
112	// #include "AliLoader.h"
113	// #include "AliStack.h"
114	// #include "AliESDtrack.h"
af885e0f	115	// #include "AliESDEvent.h"
dc293ae9	116	#include "AliLog.h"
dc293ae9	117	#include "AliEMCALPID.h"
89ffc0b0	118	#include "AliESDCaloCluster.h"
8ba062b1	119	#include "AliEMCALRecParam.h"
	120	#include "AliEMCALReconstructor.h"
	121
dc293ae9	122
	123	ClassImp(AliEMCALPID)
	124
4cfd8ef9	125	//______________________________________________
	126	AliEMCALPID::AliEMCALPID():
	127	fPrintInfo(kFALSE), fProbGamma(0.),fProbPiZero(0.),fProbHadron(0.),fReconstructor(kFALSE)
dc293ae9	128	{
4cfd8ef9	129	//
	130	// Constructor.
	131	// Initialize all constant values which have to be used
	132	// during PID algorithm execution
	133	//
	134
	135	// set flag for printing to FALSE by default
	136	fPrintInfo = kFALSE;
8ba062b1	137
4cfd8ef9	138	fPIDWeight[0] = -1;
	139	fPIDWeight[1] = -1;
	140	fPIDWeight[2] = -1;
	141	fReconstructor = kFALSE;
8ba062b1	142
	143	const AliEMCALRecParam* recParam = AliEMCALReconstructor::GetRecParam();
	144	if(!recParam) {
	145	AliFatal("Reconstruction parameters for EMCAL not set!");
	146	}
	147	else {
	148	for(Int_t i=0; i<6; i++){
	149	for(Int_t j=0; i<6; i++){
	150	fGamma[i][j] = recParam->GetGamma(i,j);
	151	fHadron[i][j] = recParam->GetHadron(i,j);
	152	fPiZero5to10[i][j] = recParam->GetPiZero5to10(i,j);
	153	fPiZero10to60[i][j] = recParam->GetPiZero10to60(i,j);
	154	AliDebug(1,Form("PID parameters: fGamma=%.3f, fPi=%.3f, fHAdron=%.3f",
	155	fGamma[1][1],fPiZero5to10[1][1],fHadron[1][1] ));
	156	}
	157	}
	158
	159	}
	160
	161
dc293ae9	162	}
4cfd8ef9	163
4cfd8ef9	164	//______________________________________________
af885e0f	165	void AliEMCALPID::RunPID(AliESDEvent *esd)
dc293ae9	166	{
	167	//
	168	// Make the PID for all the EMCAL clusters containedin the ESDs File
	169	// but just gamma/PiO/Hadron
	170	//
	171	// trivial check against NULL object passed
8ba062b1	172
dc293ae9	173	if (esd == 0x0) {
4ce73a00	174	AliInfo("NULL ESD object passed !!" );
dc293ae9	175	return ;
dc293ae9	176	}
4cfd8ef9	177
dc293ae9	178	Int_t nClusters = esd->GetNumberOfEMCALClusters();
	179	Int_t firstCluster = esd->GetFirstEMCALCluster();
	180	Double_t energy, lambda0;
	181	for (Int_t iCluster = firstCluster; iCluster < (nClusters + firstCluster); iCluster++) {
8ba062b1	182
dc293ae9	183	AliESDCaloCluster *clust = esd->GetCaloCluster(iCluster);
7592dfc4	184	energy = clust->E();
dc293ae9	185	lambda0 = clust->GetM02();
	186	// verify cluster type
	187	Int_t clusterType= clust->GetClusterType();
8ada0ffe	188	if (clusterType == AliESDCaloCluster::kEMCALClusterv1 && lambda0 != 0 && energy < 1000) {
4ce73a00	189
4ce73a00	190
dc293ae9	191	// reject clusters with lambda0 = 0
4ce73a00	192
4ce73a00	193
dc293ae9	194	ComputePID(energy, lambda0);
4ce73a00	195
4ce73a00	196
dc293ae9	197	if (fPrintInfo) {
	198	AliInfo("___________________________________________________");
	199	AliInfo(Form( "Particle Energy = %f",energy));
	200	AliInfo(Form( "Particle Lambda0 of the particle = %f", lambda0) );
	201	AliInfo("PIDWeight of the particle :" );
	202	AliInfo(Form( " GAMMA : %f",fPID[0] ));
	203	AliInfo(Form( " PiZero : %f",fPID[1] ));
	204	AliInfo(Form( " HADRON : %f", fPID[2] ));
	205	AliInfo("_________________________________________");
	206	AliInfo(Form( " kElectron : %f", fPIDFinal[0]) );
	207	AliInfo(Form( " kMuon : %f", fPIDFinal[1] ));
	208	AliInfo(Form( " kPion : %f", fPIDFinal[2] ));
	209	AliInfo(Form( " kKaon : %f", fPIDFinal[3] ));
	210	AliInfo(Form( " kProton : %f", fPIDFinal[4] ));
	211	AliInfo(Form( " kPhoton : %f", fPIDFinal[5] ));
	212	AliInfo(Form( " kPi0 : %f", fPIDFinal[6] ));
	213	AliInfo(Form( " kNeutron : %f", fPIDFinal[7] ));
	214	AliInfo(Form( " kKaon0 : %f", fPIDFinal[8] ));
	215	AliInfo(Form( " kEleCon : %f", fPIDFinal[9] ));
	216	AliInfo(Form( " kUnknown : %f", fPIDFinal[10] ));
	217	AliInfo("___________________________________________________");
	218	}
4cfd8ef9	219
dc293ae9	220	if(fReconstructor) // In case it is called during reconstruction.
	221	clust->SetPid(fPIDFinal);
	222	} // end if (clusterType...)
	223	} // end for (iCluster...)
	224	}
4cfd8ef9	225
4cfd8ef9	226	//__________________________________________________________
dc293ae9	227	void AliEMCALPID::ComputePID(Double_t energy, Double_t lambda0)
	228	{
	229	//
	230	// This is the main command, which uses the distributions computed and parametrised,
	231	// and gives the PID by the bayesian method.
	232	//
4ce73a00	233
	234	if (energy<5){energy =6;}
	235
	236
4cfd8ef9	237	TArrayD paramDistribGamma = DistLambda0(energy, 1);
	238	TArrayD paramDistribPiZero = DistLambda0(energy, 2);
	239	TArrayD paramDistribHadron = DistLambda0(energy, 3);
	240
	241	Bool_t norm = kFALSE;
	242
	243	fProbGamma = TMath::Gaus(lambda0, paramDistribGamma[1], paramDistribGamma[2], norm) * paramDistribGamma[0];
	244	fProbGamma += TMath::Landau(lambda0, paramDistribGamma[4], paramDistribGamma[5], norm) * paramDistribGamma[3];
	245	fProbPiZero = TMath::Gaus(lambda0, paramDistribPiZero[1], paramDistribPiZero[2], norm) * paramDistribPiZero[0];
	246	fProbPiZero += TMath::Landau(lambda0, paramDistribPiZero[4], paramDistribPiZero[5], norm) * paramDistribPiZero[3];
	247	fProbHadron = TMath::Gaus(lambda0, paramDistribHadron[1], paramDistribHadron[2], norm) * paramDistribHadron[0];
	248	fProbHadron += TMath::Landau(lambda0, paramDistribHadron[4], paramDistribHadron[5], norm) * paramDistribHadron[3];
	249
	250	// compute PID Weight
	251	fPIDWeight[0] = fProbGamma / (fProbGamma + fProbPiZero + fProbHadron);
	252	fPIDWeight[1] = fProbPiZero / (fProbGamma+fProbPiZero+fProbHadron);
	253	fPIDWeight[2] = fProbHadron / (fProbGamma+fProbPiZero+fProbHadron);
	254
	255	SetPID(fPIDWeight[0], 0);
	256	SetPID(fPIDWeight[1], 1);
	257	SetPID(fPIDWeight[2], 2);
	258
	259	// sortie ecran pid Weight only for control (= in english ???)
	260	if (fPrintInfo) {
	261	AliInfo(Form( "Energy in loop = %f", energy) );
	262	AliInfo(Form( "Lambda0 in loop = %f", lambda0) );
	263	AliInfo(Form( "fProbGamma in loop = %f", fProbGamma) );
	264	// AliInfo(Form( "fParametresDistribGamma[2] = %f", fParamDistribGamma[2]) );
	265	AliInfo(Form( "fProbaPiZero = %f", fProbPiZero ));
	266	AliInfo(Form( "fProbaHadron = %f", fProbHadron) );
	267	AliInfo(Form( "PIDWeight in loop = %f \|\|\| %f \|\|\| %f", fPIDWeight[0] , fPIDWeight[1], fPIDWeight[2]) );
	268	AliInfo(Form( "fGamma[2][2] = %f", fGamma[2][2] ));
	269	AliInfo("********************************************************" );
	270	}
	271
	272	fPIDFinal[0] = fPIDWeight[0]/2;
	273	fPIDFinal[1] = fPIDWeight[2]/8;
	274	fPIDFinal[2] = fPIDWeight[2]/8;
	275	fPIDFinal[3] = fPIDWeight[2]/8;
	276	fPIDFinal[4] = fPIDWeight[2]/8;
	277	fPIDFinal[5] = fPIDWeight[0]/2;
	278	fPIDFinal[6] = fPIDWeight[1] ;
	279	fPIDFinal[7] = fPIDWeight[2]/8;
	280	fPIDFinal[8] = fPIDWeight[2]/8;
	281	fPIDFinal[9] = fPIDWeight[2]/8;
	282	fPIDFinal[10] = fPIDWeight[2]/8;
dc293ae9	283	}
4cfd8ef9	284
4cfd8ef9	285	//________________________________________________________
dc293ae9	286	TArrayD AliEMCALPID::DistLambda0(Double_t energy, Int_t type)
dc293ae9	287	{
4cfd8ef9	288	//
	289	// Compute the values of the parametrised distributions using the data initialised before.
	290	//
	291	Double_t constGauss = 0., meanGauss = 0., sigmaGauss = 0.;
	292	Double_t constLandau=0., mpvLandau=0., sigmaLandau=0.;
	293	TArrayD distributionParam(6);
	294
	295	switch (type) {
	296	case 1:
	297	constGauss = Polynomial(energy, fGamma[0]);
	298	meanGauss = Polynomial(energy, fGamma[1]);
	299	sigmaGauss = Polynomial(energy, fGamma[2]);
	300	constLandau = Polynomial(energy, fGamma[3]);
	301	mpvLandau = Polynomial(energy, fGamma[4]);
	302	sigmaLandau = Polynomial(energy, fGamma[5]);
	303	break;
	304	case 2:
	305	if (energy < 10) {
	306	constGauss = Polynomial(energy, fPiZero5to10[0]);
	307	meanGauss = Polynomial(energy, fPiZero5to10[1]);
	308	sigmaGauss = Polynomial(energy, fPiZero5to10[2]);
	309	constLandau = Polynomial(energy, fPiZero5to10[3]);
	310	mpvLandau = Polynomial(energy, fPiZero5to10[4]);
	311	sigmaLandau = Polynomial(energy, fPiZero5to10[5]);
	312	}
	313	else {
	314	constGauss = Polynomial(energy, fPiZero10to60[0]);
	315	meanGauss = Polynomial(energy, fPiZero10to60[1]);
	316	sigmaGauss = Polynomial(energy, fPiZero10to60[2]);
	317	constLandau = Polynomial(energy, fPiZero10to60[3]);
	318	mpvLandau = Polynomial(energy, fPiZero10to60[4]);
	319	sigmaLandau = Polynomial(energy, fPiZero10to60[5]);
	320	}
	321	break;
	322	case 3:
	323	constGauss = Polynomial(energy, fHadron[0]);
	324	meanGauss = Polynomial(energy, fHadron[1]);
	325	sigmaGauss = Polynomial(energy, fHadron[2]);
	326	constLandau = Polynomial(energy, fHadron[3]);
	327	mpvLandau = Polynomial(energy, fHadron[4]);
	328	sigmaLandau = Polynomial(energy, fHadron[5]);
	329	break;
	330	}
	331
	332	distributionParam[0] = constGauss;
	333	distributionParam[1] = meanGauss;
	334	distributionParam[2] = sigmaGauss;
	335	distributionParam[3] = constLandau;
	336	distributionParam[4] = mpvLandau;
	337	distributionParam[5] = sigmaLandau;
	338
	339	return distributionParam;
dc293ae9	340	}
4cfd8ef9	341
4cfd8ef9	342	//_______________________________________________________
dc293ae9	343	Double_t AliEMCALPID::Polynomial(Double_t x, Double_t *params)
dc293ae9	344	{
4cfd8ef9	345	//
	346	// Compute a polynomial for a given value of 'x'
	347	// with the array of parameters passed as the second arg
	348	//
	349	Double_t y;
	350	y = params[0];
	351	y += params[1] * x;
	352	y += params[2] * x * x;
	353	y += params[3] * x * x * x;
	354	y += params[4] * x * x * x * x;
	355	y += params[5] * x * x * x * x * x;
	356
	357	return y;
dc293ae9	358	}