**************************************************************************/
/* $Id$ */
-
-//_________________________________________________________________________
-// Algorithm class for the identification of particles detected in EMCAL
-// base class of identified particle
-// Why should I put meaningless comments
-// just to satisfy
-// the code checker
-
-//
-//*-- Author: Yves Schutz (SUBATECH) & Dmitri Peressounko
-
-
+/* History of cvs commits:
+ *
+ * $Log$
+ * 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 library ---
+// standard C++ includes
+#include <Riostream.h>
+// #include <cstdlib>
+// #include <cmath>
-// --- AliRoot header files ---
-#include "AliEMCALPID.h"
+// 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 "AliESD.h"
+#include "AliLog.h"
+#include "AliEMCALPID.h"
+
ClassImp(AliEMCALPID)
-//____________________________________________________________________________
- AliEMCALPID::AliEMCALPID():TTask("","")
+//______________________________________________
+ AliEMCALPID::AliEMCALPID():
+ fPrintInfo(kFALSE), fProbGamma(0.),fProbPiZero(0.),fProbHadron(0.),fReconstructor(kFALSE)
{
- // ctor
- fEventFolderName = "" ;
- fFirstEvent = 0 ;
- fLastEvent = -1 ;
+ //
+ // Constructor.
+ // Initialize all constant values which have to be used
+ // during PID algorithm execution
+ //
+
+ // set flag for printing to FALSE by default
+ fPrintInfo = kFALSE;
+
+ // as a first step, all array elements are initialized to 0.0
+ Int_t i, j;
+ for (i = 0; i < 6; i++) {
+ for (j = 0; j < 6; j++) {
+ fGamma[i][j] = fHadron[i][j] = fPiZero5to10[i][j] = fPiZero10to60[i][j] = 0.;
+ }
+ }
+
+ // then, only the ones which must be not zero are initialized
+ // while the others will remain to the value 0.0
+
+ fGamma[0][0] = 0.038022;
+ fGamma[0][1] = -0.0001883;
+ fGamma[0][2] = 5.449e-06;
+
+ fGamma[1][0] = 0.207313;
+ fGamma[1][1] = -0.000978;
+ fGamma[1][2] = 0.00001634;
+
+ fGamma[2][0] = 0.043364;
+ fGamma[2][1] = -0.0002048;
+ fGamma[2][2] = 8.661e-06;
+ fGamma[2][3] = -1.353e-07;
+
+ fGamma[3][0] = 0.265004;
+ fGamma[3][1] = 0.061298;
+ fGamma[3][2] = -0.003203;
+ fGamma[3][3] = 4.73e-05;
+
+ fGamma[4][0] = 0.243579;
+ fGamma[4][1] = -1.614e-05;
+
+ fGamma[5][0] = 0.002942;
+ fGamma[5][1] = -3.976e-05;
+
+ fHadron[0][0] = 0.011945 / 3.;
+ fHadron[0][1] = 0.000386 / 3.;
+ fHadron[0][2] = -0.000014 / 3.;
+ fHadron[0][3] = 1.336e-07 / 3.;
+
+ fHadron[1][0] = 0.496544;
+ fHadron[1][1] = -0.003226;
+ fHadron[1][2] = 0.00001678;
+
+ fHadron[2][0] = 0.144838;
+ fHadron[2][1] = -0.002954;
+ fHadron[2][2] = 0.00008754;
+ fHadron[2][3] = -7.587e-07;
+
+ fHadron[3][0] = 1.264461 / 7.;
+ fHadron[3][1] = 0.002097 / 7.;
+
+ fHadron[4][0] = 0.261950;
+ fHadron[4][1] = -0.001078;
+ fHadron[4][2] = 0.00003237;
+ fHadron[4][3] = -3.241e-07;
+ fHadron[4][4] = 0.;
+ fHadron[4][5] = 0.;
+ fHadron[5][0] = 0.010317;
+ fHadron[5][1] = 0.;
+ fHadron[5][2] = 0.;
+ fHadron[5][3] = 0.;
+ fHadron[5][4] = 0.;
+ fHadron[5][5] = 0.;
+
+ fPiZero5to10[0][0] = 0.009138;
+ fPiZero5to10[0][1] = 0.0006377;
+
+ fPiZero5to10[1][0] = 0.08;
+
+ fPiZero5to10[2][0] = -0.061119;
+ fPiZero5to10[2][1] = 0.019013;
+
+ fPiZero5to10[3][0] = 0.2;
+
+ fPiZero5to10[4][0] = 0.252044;
+ fPiZero5to10[4][1] = -0.002315;
+
+ fPiZero5to10[5][0] = 0.002942;
+ fPiZero5to10[5][1] = -3.976e-05;
+
+ fPiZero10to60[0][0] = 0.009138;
+ fPiZero10to60[0][1] = 0.0006377;
+
+ fPiZero10to60[1][0] = 1.272837;
+ fPiZero10to60[1][1] = -0.069708;
+ fPiZero10to60[1][2] = 0.001568;
+ fPiZero10to60[1][3] = -1.162e-05;
+
+ fPiZero10to60[2][0] = 0.139703;
+ fPiZero10to60[2][1] = 0.003687;
+ fPiZero10to60[2][2] = -0.000568;
+ fPiZero10to60[2][3] = 1.498e-05;
+ fPiZero10to60[2][4] = -1.174e-07;
+
+ fPiZero10to60[3][0] = -0.826367;
+ fPiZero10to60[3][1] = 0.096951;
+ fPiZero10to60[3][2] = -0.002215;
+ fPiZero10to60[3][3] = 2.523e-05;
+
+ fPiZero10to60[4][0] = 0.249890;
+ fPiZero10to60[4][1] = -0.000063;
+
+ fPiZero10to60[5][0] = 0.002942;
+ fPiZero10to60[5][1] = -3.976e-05;
+
+ fPIDWeight[0] = -1;
+ fPIDWeight[1] = -1;
+ fPIDWeight[2] = -1;
+ fReconstructor = kFALSE;
}
+//______________________________________________
+void AliEMCALPID::RunPID(AliESD *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->GetClusterEnergy();
+ lambda0 = clust->GetM02();
+ // verify cluster type
+ Int_t clusterType= clust->GetClusterType();
+ if (clusterType == AliESDCaloCluster::kClusterv1 && 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;
+}
-//____________________________________________________________________________
-AliEMCALPID::AliEMCALPID(const TString alirunFileName, const TString eventFolderName)
-:TTask("EMCAL"+AliConfig::fgkPIDTaskName, alirunFileName), fEventFolderName(eventFolderName)
+//________________________________________________________
+TArrayD AliEMCALPID::DistLambda0(Double_t energy, Int_t type)
{
- // ctor
- fFirstEvent = 0 ;
- fLastEvent = -1 ;
+ //
+ // 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;
}
-//____________________________________________________________________________
-AliEMCALPID::~AliEMCALPID()
+//_______________________________________________________
+Double_t AliEMCALPID::Polynomial(Double_t x, Double_t *params)
{
- // dtor
-
+ //
+ // 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;
}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff