// - PCA: Principal Components Analysis..
// The identified particle has an identification number corresponding
// to a 9 bits number:
-// -Bit 0 to 2: bit set if RCPV > fCpvEmcDistance (each bit corresponds
+// -Bit 0 to 2: bit set if RCPV > CpvEmcDistance (each bit corresponds
// to a different efficiency-purity point of the photon identification)
-// -Bit 3 to 5: bit set if TOF < fTimeGate (each bit corresponds
+// -Bit 3 to 5: bit set if TOF < TimeGate (each bit corresponds
// to a different efficiency-purity point of the photon identification)
// -Bit 6 to 9: bit set if Principal Components are
-// inside an ellipse defined by fX_center, fY_center, fA, fB, fAngle
+// inside an ellipse defined by the parameters a, b, c, x0 and y0.
// (each bit corresponds to a different efficiency-purity point of the
-// photon identification)
+// photon identification)
+// The PCA (Principal components analysis) needs a file that contains
+// a previous analysis of the correlations between the particles. This
+// file is $ALICE_ROOT/PHOS/PCA8pa15_0.5-100.root. Analysis done for
+// energies between 0.5 and 100 GeV.
// A calibrated energy is calculated. The energy of the reconstructed
-// cluster is corrected with the formula A + B * E + C * E^2, whose parameters
-// where obtained thourgh the study of the reconstructed energy
-// distribution of monoenergetic photons.
-//
+// cluster is corrected with the formula A + B * E + C * E^2, whose
+// parameters where obtained through the study of the reconstructed
+// energy distribution of monoenergetic photons.
//
+// All the parameters (RCPV(2 rows-3 columns),TOF(1r-3c),PCA(5r-4c)
+// and calibration(1r-3c))are stored in a file called
+// $ALICE_ROOT/PHOS/Parameters.dat. Each time that AliPHOSPIDv1 is
+// initialized, this parameters are copied to a Matrix (9,4), a
+// TMatrixD object.
//
// use case:
-// root [0] AliPHOSPIDv1 * p = new AliPHOSPIDv1("galice1.root","v1")
+// root [0] AliPHOSPIDv1 * p = new AliPHOSPIDv1("galice1.root")
// Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated
-// // reading headers from file galice1.root and create RecParticles with title v1
- // TrackSegments and RecPoints with title "v1" are used
-// // set file name for the branch RecParticles
+// // reading headers from file galice1.root and create RecParticles
+ // TrackSegments and RecPoints are used
+// // set file name for the branch RecParticles
// root [1] p->ExecuteTask("deb all time")
-// // available options
-// // "deb" - prints # of reconstructed particles
-// // "deb all" - prints # and list of RecParticles
-// // "time" - prints benchmarking results
+// // available options
+// // "deb" - prints # of reconstructed particles
+// // "deb all" - prints # and list of RecParticles
+// // "time" - prints benchmarking results
//
-// root [2] AliPHOSPIDv1 * p2 = new AliPHOSPIDv1("galice1.root","v1","v0")
+// root [2] AliPHOSPIDv1 * p2 = new AliPHOSPIDv1("galice1.root","v1",kTRUE)
// Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated
-// // reading headers from file galice1.root and create RecParticles with title v1
- // RecPoints and TrackSegments with title "v0" are used
+// //Split mode.
// root [3] p2->ExecuteTask()
//
-// There are two possible principal files available to do the analysis.
-// One for energy ranges from 0.5 to 5 GeV, and another
-// one from 5 to 100 GeV. This files are automatically called in function
-// of the cluster energy.
+
//*-- Author: Yves Schutz (SUBATECH) & Gines Martinez (SUBATECH) &
// Gustavo Conesa April 2002
-
+// PCA redesigned by Gustavo Conesa October 2002:
+// The way of using the PCA has changed. Instead of 2
+// files with the PCA, each one with different energy ranges
+// of application, we use the wide one (0.5-100 GeV), and instead
+// of fixing 3 ellipses for different ranges of energy, it has been
+// studied the dependency of the ellipses parameters with the
+// energy, and they are implemented in the code as a funtion
+// of the energy.
+//
+//
+//
// --- ROOT system ---
#include "TROOT.h"
#include "TTree.h"
// --- Standard library ---
-#include <iostream>
-#include <fstream>
-#include <iomanip>
// --- AliRoot header files ---
-#include "AliRun.h"
#include "AliGenerator.h"
#include "AliPHOS.h"
#include "AliPHOSPIDv1.h"
InitParameters() ;
fDefaultInit = kTRUE ;
+}
+
+//____________________________________________________________________________
+AliPHOSPIDv1::AliPHOSPIDv1(const AliPHOSPIDv1 & pid ):AliPHOSPID(pid)
+{
+ // ctor
+ InitParameters() ;
+ Init() ;
}
//____________________________________________________________________________
-AliPHOSPIDv1::AliPHOSPIDv1(const char * headerFile,const char * name, const Bool_t toSplit)
-:AliPHOSPID(headerFile, name,toSplit)
+AliPHOSPIDv1::AliPHOSPIDv1(const TString alirunFileName, const TString eventFolderName):AliPHOSPID(alirunFileName, eventFolderName)
{
//ctor with the indication on where to look for the track segments
InitParameters() ;
-
Init() ;
fDefaultInit = kFALSE ;
-
}
//____________________________________________________________________________
AliPHOSPIDv1::~AliPHOSPIDv1()
{
// dtor
- // fDefaultInit = kTRUE if PID created by default ctor (to get just the parameters)
-
- delete [] fX ; // Principal input
- delete [] fP ; // Principal components
-// delete fParameters ; // Matrix of Parameters
-// delete fParameters5 ; // Matrix of Parameters
-// delete fParameters100 ; // Matrix of Parameters
-
- if (!fDefaultInit) {
-// AliPHOSGetter * gime = AliPHOSGetter::GetInstance() ;
- // remove the task from the folder list
-// gime->RemoveTask("P",GetName()) ;
-// TString name(GetName()) ;
-// name.ReplaceAll("pid", "clu") ;
-// gime->RemoveTask("C",name) ;
-
-// // remove the data from the folder list
-// name = GetName() ;
-// name.Remove(name.Index(":")) ;
-// gime->RemoveObjects("RE", name) ; // EMCARecPoints
-// gime->RemoveObjects("RC", name) ; // CPVRecPoints
-// gime->RemoveObjects("T", name) ; // TrackSegments
-// gime->RemoveObjects("P", name) ; // RecParticles
-
-// // Delete gAlice
-// gime->CloseFile() ;
-
- fSplitFile = 0 ;
- }
+ delete [] fX ; // Principal input
+ delete [] fPPhoton ; // Photon Principal components
+ delete [] fPPi0 ; // Pi0 Principal components
}
-
//____________________________________________________________________________
const TString AliPHOSPIDv1::BranchName() const
{
- TString branchName(GetName() ) ;
- branchName.Remove(branchName.Index(Version())-1) ;
- return branchName ;
+
+ return GetName() ;
}
//____________________________________________________________________________
// Make all memory allocations that are not possible in default constructor
// Add the PID task to the list of PHOS tasks
- if ( strcmp(GetTitle(), "") == 0 )
- SetTitle("galice.root") ;
-
- TString branchname(GetName()) ;
- branchname.Remove(branchname.Index(Version())-1) ;
- AliPHOSGetter * gime = AliPHOSGetter::GetInstance(GetTitle(),branchname.Data(),fToSplit ) ;
-
- // gime->SetRecParticlesTitle(BranchName()) ;
- if ( gime == 0 ) {
- cerr << "ERROR: AliPHOSPIDv1::Init -> Could not obtain the Getter object !" << endl ;
- return ;
- }
-
- fSplitFile = 0 ;
- if(fToSplit){
- //First - extract full path if necessary
- TString fileName(GetTitle()) ;
- Ssiz_t islash = fileName.Last('/') ;
- if(islash<fileName.Length())
- fileName.Remove(islash+1,fileName.Length()) ;
- else
- fileName="" ;
- fileName+="PHOS.RecData." ;
- if((strcmp(branchname.Data(),"Default")!=0)&&(strcmp(branchname.Data(),"")!=0)){
- fileName+=branchname.Data() ;
- fileName+="." ;
- }
- fileName+="root" ;
- fSplitFile = static_cast<TFile*>(gROOT->GetFile(fileName.Data()));
- if(!fSplitFile)
- fSplitFile = TFile::Open(fileName.Data(),"update") ;
- }
-
- gime->PostPID(this) ;
- // create a folder on the white board //YSAlice/WhiteBoard/RecParticles/PHOS/recparticlesName
- gime->PostRecParticles(branchname) ;
-
+ AliPHOSGetter * gime = AliPHOSGetter::Instance(GetTitle(), fEventFolderName.Data()) ;
+
+ if ( !gime->PID() )
+ gime->PostPID(this) ;
}
//____________________________________________________________________________
void AliPHOSPIDv1::InitParameters()
{
-// fFrom = "" ;
-// fHeaderFileName = GetTitle() ;
-// TString name(GetName()) ;
-// if (name.IsNull())
-// name = "Default" ;
-// fTrackSegmentsTitle = name ;
-// fRecPointsTitle = name ;
-// fRecParticlesTitle = name ;
-// name.Append(":") ;
-// name.Append(Version()) ;
-// SetName(name) ;
+ // Initialize PID parameters
fRecParticlesInRun = 0 ;
fNEvent = 0 ;
- // fClusterizer = 0 ;
- // fTSMaker = 0 ;
fRecParticlesInRun = 0 ;
- TString pidName( GetName()) ;
- if (pidName.IsNull() )
- pidName = "Default" ;
- pidName.Append(":") ;
- pidName.Append(Version()) ;
- SetName(pidName) ;
SetParameters() ; // fill the parameters matrix from parameters file
}
-//____________________________________________________________________________
-Double_t AliPHOSPIDv1::GetCpvtoEmcDistanceCut(const Float_t Cluster_En, const TString Eff_Pur)
+//________________________________________________________________________
+void AliPHOSPIDv1::Exec(Option_t * option)
{
- // Get CpvtoEmcDistanceCut parameter depending on the cluster energy and
- // Purity-Efficiency point (possible options "HIGH EFFICIENCY"
- // "MEDIUM EFFICIENCY" "LOW EFFICIENCY" and 3 more options changing
- // EFFICIENCY by PURITY)
+ //Steering method
- Int_t eff_pur = GetEffPurOption(Eff_Pur);
+
+ if(strstr(option,"tim"))
+ gBenchmark->Start("PHOSPID");
- GetAnalysisParameters(Cluster_En) ;
- if((fClusterrcpv!= -1)&&(eff_pur != -1))
- return (*fParameters)(fClusterrcpv,eff_pur) ;
- else
- return 0.0;
-}
-//____________________________________________________________________________
+ if(strstr(option,"print")) {
+ Print() ;
+ return ;
+ }
-Double_t AliPHOSPIDv1::GetTimeGate(const Float_t Cluster_En, const TString Eff_Pur)
-{
- // Get TimeGate parameter depending on the cluster energy and
- // Purity-Efficiency point (possible options "HIGH EFFICIENCY"
- // "MEDIUM EFFICIENCY" "LOW EFFICIENCY" and 3 more options changing
- // EFFICIENCY by PURITY)
+
+ AliPHOSGetter * gime = AliPHOSGetter::Instance() ;
- Int_t eff_pur = GetEffPurOption(Eff_Pur);
- GetAnalysisParameters(Cluster_En) ;
+ Int_t nevents = gime->MaxEvent() ;
+ Int_t ievent ;
- if((fCluster!= -1)&&(eff_pur != -1))
- return (*fParameters)(fCluster+3+fMatrixExtraRow,eff_pur) ;
- else
- return 0.0;
-}
-//_____________________________________________________________________________
-Float_t AliPHOSPIDv1::GetDistance(AliPHOSEmcRecPoint * emc,AliPHOSRecPoint * cpv, Option_t * Axis)const
-{
- // Calculates the distance between the EMC RecPoint and the PPSD RecPoint
-
- const AliPHOSGeometry * geom = AliPHOSGetter::GetInstance()->PHOSGeometry() ;
- TVector3 vecEmc ;
- TVector3 vecCpv ;
- if(cpv){
- emc->GetLocalPosition(vecEmc) ;
- cpv->GetLocalPosition(vecCpv) ;
- if(emc->GetPHOSMod() == cpv->GetPHOSMod()){
- // Correct to difference in CPV and EMC position due to different distance to center.
- // we assume, that particle moves from center
- Float_t dCPV = geom->GetIPtoOuterCoverDistance();
- Float_t dEMC = geom->GetIPtoCrystalSurface() ;
- dEMC = dEMC / dCPV ;
- vecCpv = dEMC * vecCpv - vecEmc ;
- if (Axis == "X") return vecCpv.X();
- if (Axis == "Y") return vecCpv.Y();
- if (Axis == "Z") return vecCpv.Z();
- if (Axis == "R") return vecCpv.Mag();
- }
-
- return 100000000 ;
+ for(ievent = 0; ievent < nevents; ievent++){
+ gime->Event(ievent,"TR") ;
+ if(gime->TrackSegments() && //Skip events, where no track segments made
+ gime->TrackSegments()->GetEntriesFast()) {
+ MakeRecParticles() ;
+ WriteRecParticles();
+ if(strstr(option,"deb"))
+ PrintRecParticles(option) ;
+ //increment the total number of rec particles per run
+ fRecParticlesInRun += gime->RecParticles()->GetEntriesFast() ;
+ }
}
- return 100000000 ;
+ if(strstr(option,"tim")){
+ gBenchmark->Stop("PHOSPID");
+ Info("Exec", "took %f seconds for PID %f seconds per event",
+ gBenchmark->GetCpuTime("PHOSPID"),
+ gBenchmark->GetCpuTime("PHOSPID")/nevents) ;
+ }
+
+ Unload();
}
//____________________________________________________________________________
-Double_t AliPHOSPIDv1::CalibratedEnergy(Float_t e){
- //It calibrates Energy depending on the recpoint energy.
-// The energy of the reconstructed
-// cluster is corrected with the formula A + B* E + C* E^2, whose parameters
-// where obtained through the study of the reconstructed energy
-// distribution of monoenergetic photons.
- Double_t enerec;
- enerec = fACalParameter + fBCalParameter * e+ fCCalParameter * e * e;
- return enerec ;
-
+const TString AliPHOSPIDv1::GetFileNamePrincipal(TString particle) const
+{
+ //Get file name that contains the PCA for a particle ("photon or pi0")
+ particle.ToLower();
+ TString name;
+ if (particle=="photon") name = fFileNamePrincipalPhoton ;
+ else if (particle=="pi0" ) name = fFileNamePrincipalPi0 ;
+ else Error("GetFileNamePrincipal","Wrong particle name: %s (choose from pi0/photon)\n",particle.Data());
+ return name;
}
+
//____________________________________________________________________________
-Int_t AliPHOSPIDv1::GetPrincipalSign(Double_t* P, Int_t cluster, Int_t eff_pur)const
+const Float_t AliPHOSPIDv1::GetParameterCalibration(Int_t i) const
{
- //This method gives if the PCA of the particle are inside a defined ellipse
- // Get the parameters that define the ellipse stored in the
- // fParameters matrix.
- Double_t X_center = (*fParameters)(cluster+6,eff_pur) ;
- Double_t Y_center = (*fParameters)(cluster+9,eff_pur) ;
- Double_t A = (*fParameters)(cluster+12,eff_pur) ;
- Double_t B = (*fParameters)(cluster+15,eff_pur) ;
- Double_t Angle = (*fParameters)(cluster+18,eff_pur) ;
-
- Int_t prinsign;
- Double_t Dx = 0. ;
- Double_t Delta = 0. ;
- Double_t Y = 0. ;
- Double_t Y_1 = 0. ;
- Double_t Y_2 = 0. ;
- Double_t Pi = TMath::Pi() ;
- Double_t Cos_Theta = TMath::Cos(Pi*Angle/180.) ;
- Double_t Sin_Theta = TMath::Sin(Pi*Angle/180.) ;
-
- Dx = P[0] - X_center ;
- Delta = 4.*A*A*B*B* (A*A*Cos_Theta*Cos_Theta
- + B*B*Sin_Theta*Sin_Theta - Dx*Dx) ;
- if (Delta < 0.)
- {prinsign=0;}
-
- else if (Delta == 0.)
- {
- Y = Cos_Theta*Sin_Theta*(A*A - B*B)*Dx /
- (A*A*Cos_Theta*Cos_Theta + B*B*Sin_Theta*Sin_Theta) ;
- Y += Y_center ;
- if(P[1]==Y )
- {prinsign=1;}
- else
- {prinsign=0;}
- }
- else
- {
- Y_1 = (Cos_Theta*Sin_Theta*(A*A - B*B) *Dx +
- TMath::Sqrt(Delta)/2.)/(A*A*Cos_Theta*Cos_Theta +
- B*B*Sin_Theta*Sin_Theta) ;
- Y_2 = (Cos_Theta*Sin_Theta*(A*A - B*B) *Dx -
- TMath::Sqrt(Delta)/2.)/(A*A*Cos_Theta*Cos_Theta
- + B*B*Sin_Theta*Sin_Theta) ;
- Y_1 += Y_center ;
- Y_2 += Y_center ;
- if ((P[1]<=Y_1) && (P[1]>=Y_2))
- {prinsign=1;}
- else
- {prinsign=0;}
- }
- return prinsign;
+ // Get the i-th parameter "Calibration"
+ Float_t param = 0.;
+ if (i>2 || i<0)
+ Error("GetParameterCalibration","Invalid parameter number: %d",i);
+ else
+ param = (*fParameters)(0,i);
+ return param;
}
//____________________________________________________________________________
-void AliPHOSPIDv1::SetEllipseParameters(Float_t Cluster_En, TString Eff_Pur, Float_t x, Float_t y,Float_t a, Float_t b,Float_t angle)
+const Float_t AliPHOSPIDv1::GetCalibratedEnergy(const Float_t e) const
{
+// It calibrates Energy depending on the recpoint energy.
+// The energy of the reconstructed cluster is corrected with
+// the formula A + B* E + C* E^2, whose parameters where obtained
+// through the study of the reconstructed energy distribution of
+// monoenergetic photons.
+
+ Float_t p[]={0.,0.,0.};
+ for (Int_t i=0; i<3; i++) p[i] = GetParameterCalibration(i);
+ Float_t enerec = p[0] + p[1]*e + p[2]*e*e;
+ return enerec ;
- // Set all ellipse parameters depending on the cluster energy and
- // Purity-Efficiency point (possible options "HIGH EFFICIENCY"
- // "MEDIUM EFFICIENCY" "LOW EFFICIENCY" and 3 more options changing
- // EFFICIENCY by PURITY)
-
- Int_t eff_pur = GetEffPurOption(Eff_Pur);
- GetAnalysisParameters(Cluster_En) ;
- if((fCluster!= -1)&&(eff_pur != -1)){
- (*fParameters)(fCluster+6 +fMatrixExtraRow,eff_pur) = x ;
- (*fParameters)(fCluster+9 +fMatrixExtraRow,eff_pur) = y ;
- (*fParameters)(fCluster+12+fMatrixExtraRow,eff_pur) = a ;
- (*fParameters)(fCluster+15+fMatrixExtraRow,eff_pur) = b ;
- (*fParameters)(fCluster+18+fMatrixExtraRow,eff_pur) = angle ;
- }
-
}
-//__________________________________________________________________________
-void AliPHOSPIDv1::SetEllipseXCenter(Float_t Cluster_En, TString Eff_Pur, Float_t x)
-{
- // Set the ellipse parameter x_center depending on the custer energy and
- // Purity-Efficiency point (possible options "HIGH EFFICIENCY"
- // "MEDIUM EFFICIENCY" "LOW EFFICIENCY" and 3 more options changing
- // EFFICIENCY by PURITY)
- Int_t eff_pur = GetEffPurOption(Eff_Pur);
- GetAnalysisParameters(Cluster_En) ;
- if((fCluster!= -1)&&(eff_pur != -1))
- (*fParameters)(fCluster+6+fMatrixExtraRow,eff_pur) = x ;
-}
-//_________________________________________________________________________
-void AliPHOSPIDv1::SetEllipseYCenter(Float_t Cluster_En, TString Eff_Pur, Float_t y)
-{
- // Set the ellipse parameter y_center depending on the cluster energy and
- // Purity-Efficiency point (possible options "HIGH EFFICIENCY"
- // "MEDIUM EFFICIENCY" "LOW EFFICIENCY" and 3 more options changing
- // EFFICIENCY by PURITY)
-
- Int_t eff_pur = GetEffPurOption(Eff_Pur);
- GetAnalysisParameters(Cluster_En) ;
- if((fCluster!= -1)&&(eff_pur != -1))
- (*fParameters)(fCluster+9+fMatrixExtraRow,eff_pur) = y ;
-}
-//_________________________________________________________________________
-void AliPHOSPIDv1::SetEllipseAParameter(Float_t Cluster_En, TString Eff_Pur, Float_t a)
+//____________________________________________________________________________
+const Float_t AliPHOSPIDv1::GetParameterCpv2Emc(Int_t i, TString axis) const
{
- // Set the ellipse parameter a depending on the cluster energy and
- // Purity-Efficiency point (possible options "HIGH EFFICIENCY"
- // "MEDIUM EFFICIENCY" "LOW EFFICIENCY" and 3 more options changing
- // EFFICIENCY by PURITY)
-
- Int_t eff_pur = GetEffPurOption(Eff_Pur);
- GetAnalysisParameters(Cluster_En) ;
- if((fCluster!= -1)&&(eff_pur != -1))
- (*fParameters)(fCluster+12+fMatrixExtraRow,eff_pur) = a ;
+ // Get the i-th parameter "CPV-EMC distance" for the specified axis
+ Float_t param = 0.;
+ if(i>2 || i<0)
+ Error("GetParameterCpv2Emc","Invalid parameter number: %d",i);
+ else {
+ axis.ToLower();
+ if (axis == "x") param = (*fParameters)(1,i);
+ else if (axis == "z") param = (*fParameters)(2,i);
+ else Error("GetParameterCpv2Emc","Invalid axis name: %s",axis.Data());
+ }
+ return param;
}
-//________________________________________________________________________
-void AliPHOSPIDv1::SetEllipseBParameter(Float_t Cluster_En, TString Eff_Pur, Float_t b)
+
+//____________________________________________________________________________
+const Float_t AliPHOSPIDv1::GetCpv2EmcDistanceCut(TString axis, Float_t e) const
{
- // Set the ellipse parameter b depending on the cluster energy and
- // Purity-Efficiency point (possible options "HIGH EFFICIENCY"
- // "MEDIUM EFFICIENCY" "LOW EFFICIENCY" and 3 more options changing
- // EFFICIENCY by PURITY)
-
- Int_t eff_pur = GetEffPurOption(Eff_Pur);
- GetAnalysisParameters(Cluster_En) ;
- if((fCluster!= -1)&&(eff_pur != -1))
- (*fParameters)(fCluster+15+fMatrixExtraRow,eff_pur) = b ;
+ // Get CpvtoEmcDistance Cut depending on the cluster energy, axis and
+ // Purity-Efficiency point
+
+ axis.ToLower();
+ Float_t p[]={0.,0.,0.};
+ for (Int_t i=0; i<3; i++) p[i] = GetParameterCpv2Emc(i,axis);
+ Float_t sig = p[0] + TMath::Exp(p[1] - p[2]*e);
+ return sig;
}
-//________________________________________________________________________
-void AliPHOSPIDv1::SetEllipseAngle(Float_t Cluster_En, TString Eff_Pur, Float_t angle)
-{
- // Set the ellipse parameter angle depending on the cluster energy and
- // Purity-Efficiency point (possible options "HIGH EFFICIENCY"
- // "MEDIUM EFFICIENCY" "LOW EFFICIENCY" and 3 more options changing
- // EFFICIENCY by PURITY)
-
- Int_t eff_pur = GetEffPurOption(Eff_Pur);
- GetAnalysisParameters(Cluster_En) ;
- if((fCluster!= -1)&&(eff_pur != -1))
- (*fParameters)(fCluster+18+fMatrixExtraRow,eff_pur) = angle ;
-}
-//_____________________________________________________________________________
-void AliPHOSPIDv1::SetCpvtoEmcDistanceCut(Float_t Cluster_En, TString Eff_Pur, Float_t cut)
+//____________________________________________________________________________
+const Float_t AliPHOSPIDv1::GetEllipseParameter(TString particle, TString param, Float_t e) const
{
+ // Calculates the parameter param of the ellipse
+
+ particle.ToLower();
+ param. ToLower();
+ Float_t p[4]={0.,0.,0.,0.};
+ Float_t value = 0.0;
+ for (Int_t i=0; i<4; i++) p[i] = GetParameterToCalculateEllipse(particle,param,i);
+ if (particle == "photon") {
+ if (param.Contains("a")) e = TMath::Min((Double_t)e,70.);
+ else if (param.Contains("b")) e = TMath::Min((Double_t)e,70.);
+ else if (param.Contains("x0")) e = TMath::Max((Double_t)e,1.1);
+ }
- // Set the parameter Cpvto EmcDistanceCut depending on the cluster energy and
- // Purity-Efficiency point (possible options "HIGH EFFICIENCY"
- // "MEDIUM EFFICIENCY" "LOW EFFICIENCY" and 3 more options changing
- // EFFICIENCY by PURITY)
+ value = p[0]/TMath::Sqrt(e) + p[1]*e + p[2]*e*e + p[3];
+ return value;
+}
+//_____________________________________________________________________________
+const Float_t AliPHOSPIDv1::GetParameterPhotonBoundary (Int_t i) const
+{
+ // Get the parameter "i" to calculate the boundary on the moment M2x
+ // for photons at high p_T
+ Float_t param = 0;
+ if (i>3 || i<0)
+ Error("GetParameterPhotonBoundary","Wrong parameter number: %d\n",i);
+ else
+ param = (*fParameters)(14,i) ;
+ return param;
+}
- Int_t eff_pur = GetEffPurOption(Eff_Pur);
- GetAnalysisParameters(Cluster_En) ;
- if((fClusterrcpv!= -1)&&(eff_pur != -1))
- (*fParameters)(fClusterrcpv,eff_pur) = cut ;
+//____________________________________________________________________________
+const Float_t AliPHOSPIDv1::GetParameterPi0Boundary (Int_t i) const
+{
+ // Get the parameter "i" to calculate the boundary on the moment M2x
+ // for pi0 at high p_T
+ Float_t param = 0;
+ if (i>2 || i<0)
+ Error("GetParameterPi0Boundary","Wrong parameter number: %d\n",i);
+ else
+ param = (*fParameters)(15,i) ;
+ return param;
}
-//_____________________________________________________________________________
-void AliPHOSPIDv1::SetTimeGate(Float_t Cluster_En, TString Eff_Pur, Float_t gate)
+
+//____________________________________________________________________________
+const Float_t AliPHOSPIDv1::GetParameterTimeGate(Int_t i) const
{
+ // Get TimeGate parameter depending on Purity-Efficiency i:
+ // i=0 - Low purity, i=1 - Medium purity, i=2 - High purity
+ Float_t param = 0.;
+ if(i>2 || i<0)
+ Error("GetParameterTimeGate","Invalid Efficiency-Purity choice %d",i);
+ else
+ param = (*fParameters)(3,i) ;
+ return param;
+}
- // Set the parameter TimeGate depending on the cluster energy and
- // Purity-Efficiency point (possible options "HIGH EFFICIENCY"
- // "MEDIUM EFFICIENCY" "LOW EFFICIENCY" and 3 more options changing
- // EFFICIENCY by PURITY)
-
- Int_t eff_pur = GetEffPurOption(Eff_Pur);
- GetAnalysisParameters(Cluster_En) ;
- if((fCluster!= -1)&&(eff_pur != -1))
- (*fParameters)(fCluster+3+fMatrixExtraRow,eff_pur) = gate ;
-}
//_____________________________________________________________________________
-void AliPHOSPIDv1::SetParameters()
- //TString OptFileName)
-{
- // PCA : To do the Principal Components Analysis it is necessary
- // the Principal file, which is opened here
- fX = new double[7]; // Data for the PCA
- fP = new double[7]; // Eigenvalues of the PCA
-
+const Float_t AliPHOSPIDv1::GetParameterToCalculateEllipse(TString particle, TString param, Int_t i) const
+{
+ // Get the parameter "i" that is needed to calculate the ellipse
+ // parameter "param" for the particle "particle" ("photon" or "pi0")
+
+ particle.ToLower();
+ param. ToLower();
+ Int_t offset = -1;
+ if (particle == "photon") offset=0;
+ else if (particle == "pi0") offset=5;
+ else
+ Error("GetParameterToCalculateEllipse","Wrong particle name: %s (choose from pi0/photon)\n",particle.Data());
- // Set the principal and parameters files to be used
- fFileName5 = "$ALICE_ROOT/PHOS/PCA8pa15_0.5-5.root" ;
- fFileNamePar5 = gSystem->ExpandPathName("$ALICE_ROOT/PHOS/Parameters_0.5_5.dat");
- fFileName100 = "$ALICE_ROOT/PHOS/PCA8pa15_0.5-100.root" ;
- fFileNamePar100 = gSystem->ExpandPathName("$ALICE_ROOT/PHOS/Parameters_0.5_100.dat");
-
- //SetPrincipalFileOptions();
- //fOptFileName);
- TFile f5( fFileName5.Data(), "read" ) ;
- fPrincipal5 = dynamic_cast<TPrincipal*> (f5.Get("principal")) ;
- f5.Close() ;
- TFile f100( fFileName100.Data(), "read" ) ;
- fPrincipal100 = dynamic_cast<TPrincipal*> (f100.Get("principal")) ;
- f100.Close() ;
- TFile f( fFileName100.Data(), "read" ) ;
- fPrincipal = dynamic_cast<TPrincipal*> (f.Get("principal")) ;
- f.Close() ;
- // Initialization of the Parameters matrix. In the File ParametersXX.dat
- // are all the parameters. These are introduced in a matrix of 21x3 or 22x3
- // elements (depending on the principal file 21 rows for 0.5-5 GeV and 22
- // rows for 5-100).
- // All the parameters defined in this file are, in order of row (there are
- // 3 rows per parameter): CpvtoEmcDistanceCut(if the principal file is 5-100
- // GeV then 4 rows), TimeGate and the ellipse parameters, X_center, Y_center,
- // a, b, angle. Each row of a given parameter depends on the cluster energy range
- // (wich depends on the chosen principal file)
- // Each column designs the parameters for a point in the Efficiency-Purity
- // of the photon identification P1(96%,63%), P2(87%,0.88%) and P3(68%,94%)
- // for the principal file from 0.5-5 GeV and for the other one P1(95%,79%),
- // P2(89%,90%) and P3(72%,96%)
-
- fEnergyAnalysisCut = 5.; // Energy cut to change PCA
-
- fParameters5 = new TMatrixD(21,3) ;
- fParameters100 = new TMatrixD(22,3) ;
- fParameters = new TMatrixD(22,3) ;
-
- ifstream paramFile5(fFileNamePar5) ;
+ Int_t p= -1;
+ Float_t par = 0;
- Int_t i,j ;
-
- for(i = 0; i< 21; i++){
- for(j = 0; j< 3; j++){
- paramFile5 >> (*fParameters5)(i,j) ;
- }
- }
- paramFile5.close();
-
- ifstream paramFile100(fFileNamePar100) ;
-
- Int_t l,k ;
+ if (param.Contains("a")) p=4+offset;
+ else if(param.Contains("b")) p=5+offset;
+ else if(param.Contains("c")) p=6+offset;
+ else if(param.Contains("x0"))p=7+offset;
+ else if(param.Contains("y0"))p=8+offset;
+
+ if (i>4 || i<0)
+ Error("GetParameterToCalculateEllipse", "No parameter with index", i) ;
+ else if (p==-1)
+ Error("GetParameterToCalculateEllipse", "No parameter with name %s", param.Data() ) ;
+ else
+ par = (*fParameters)(p,i) ;
- for(l = 0; l< 22; l++){
- for(k = 0; k< 3; k++){
- paramFile100 >> (*fParameters100)(l,k) ;
- }
- }
- paramFile100.close();
-
- ifstream paramFile(fFileNamePar100) ;
- Int_t h,n;
- for(h = 0; h< 22; h++){
- for(n = 0; n< 3; n++){
- paramFile >> (*fParameters)(h,n) ;
- }
- }
- paramFile.close();
+ return par;
+}
- fCluster = -1;
- fClusterrcpv = -1;
- fMatrixExtraRow = 0;
- //Calibration parameters Encal = C * E^2 + B * E + A (E is the energy from cluster)
- fACalParameter = 0.0241 ;
- fBCalParameter = 1.0504 ;
- fCCalParameter = 0.000249 ;
-
- // fParameters->Print();
-}
-//_____________________________________________________________________________
-void AliPHOSPIDv1::GetAnalysisParameters(Float_t Cluster_En)
+//____________________________________________________________________________
+const Float_t AliPHOSPIDv1::GetDistance(AliPHOSEmcRecPoint * emc,AliPHOSRecPoint * cpv, Option_t * axis)const
{
- if(Cluster_En <= fEnergyAnalysisCut){
- fPrincipal = fPrincipal5;
- fParameters = fParameters5;
- fMatrixExtraRow = 0;
- GetClusterOption(Cluster_En,kFALSE) ;
- }
- else{
- fPrincipal = fPrincipal100;
- fParameters = fParameters100;
- fMatrixExtraRow = 1;
- GetClusterOption(Cluster_En,kTRUE) ;
+ // Calculates the distance between the EMC RecPoint and the PPSD RecPoint
+
+ const AliPHOSGeometry * geom = AliPHOSGetter::Instance()->PHOSGeometry() ;
+ TVector3 vecEmc ;
+ TVector3 vecCpv ;
+ if(cpv){
+ emc->GetLocalPosition(vecEmc) ;
+ cpv->GetLocalPosition(vecCpv) ;
+ if(emc->GetPHOSMod() == cpv->GetPHOSMod()){
+ // Correct to difference in CPV and EMC position due to different distance to center.
+ // we assume, that particle moves from center
+ Float_t dCPV = geom->GetIPtoOuterCoverDistance();
+ Float_t dEMC = geom->GetIPtoCrystalSurface() ;
+ dEMC = dEMC / dCPV ;
+ vecCpv = dEMC * vecCpv - vecEmc ;
+ if (axis == "X") return vecCpv.X();
+ if (axis == "Y") return vecCpv.Y();
+ if (axis == "Z") return vecCpv.Z();
+ if (axis == "R") return vecCpv.Mag();
+ }
+ return 100000000 ;
}
+ return 100000000 ;
}
-
-//_____________________________________________________________________________
-void AliPHOSPIDv1::GetClusterOption(const Float_t Cluster_En, const Bool_t range)
+//____________________________________________________________________________
+const Int_t AliPHOSPIDv1::GetCPVBit(AliPHOSEmcRecPoint * emc,AliPHOSRecPoint * cpv,const Int_t effPur, Float_t e) const
{
-
- // Gives the cluster energy range.
- // range = kFALSE Default analysis range from 0.5 to 5 GeV
- // range = kTRUE analysis range from 0.5 to 100 GeV
-
-
- //Int_t cluster = -1 ;
+ if(effPur>2 || effPur<0)
+ Error("GetCPVBit","Invalid Efficiency-Purity choice %d",effPur);
- if((range == kFALSE)){
- if((Cluster_En > 0.3)&&(Cluster_En <= 1.0)){
- fCluster = 0 ;
- fClusterrcpv = 0 ;
- }
- if((Cluster_En > 1.0)&&(Cluster_En <= 2.0)){
- fCluster = 1 ;
- fClusterrcpv = 1 ;
- }
- if( Cluster_En > 2.0){
- fCluster = 2 ;
- fClusterrcpv = 2 ;
- }
- }
- else if(range == kTRUE){
- if((Cluster_En > 0.5 )&&(Cluster_En <= 20.0)) fCluster = 0 ;
- if((Cluster_En > 20.0)&&(Cluster_En <= 50.0)) fCluster = 1 ;
- if( Cluster_En > 50.0) fCluster = 2 ;
- if((Cluster_En > 5.0 )&&(Cluster_En <= 10.0)) fClusterrcpv = 0 ;
- if((Cluster_En > 10.0)&&(Cluster_En <= 20.0)) fClusterrcpv = 1 ;
- if((Cluster_En > 20.0)&&(Cluster_En <= 30.0)) fClusterrcpv = 2 ;
- if( Cluster_En > 30.0) fClusterrcpv = 3 ;
- }
- else {
- fCluster = -1 ;
- fClusterrcpv = -1;
- cout<<"Invalid Energy option"<<endl;
- }
+ Float_t sigX = GetCpv2EmcDistanceCut("X",e);
+ Float_t sigZ = GetCpv2EmcDistanceCut("Z",e);
- //return cluster;
+ Float_t deltaX = TMath::Abs(GetDistance(emc, cpv, "X"));
+ Float_t deltaZ = TMath::Abs(GetDistance(emc, cpv, "Z"));
+
+ if((deltaX>sigX*(effPur+1))|(deltaZ>sigZ*(effPur+1)))
+ return 1;//Neutral
+ else
+ return 0;//Charged
}
+
//____________________________________________________________________________
-Int_t AliPHOSPIDv1::GetEffPurOption(const TString Eff_Pur) const
+const Int_t AliPHOSPIDv1::GetPrincipalBit(TString particle, const Double_t* p,const Int_t effPur, Float_t e)const
{
+ //Is the particle inside de PCA ellipse?
+
+ particle.ToLower();
+ Int_t prinbit = 0 ;
+ Float_t a = GetEllipseParameter(particle,"a" , e);
+ Float_t b = GetEllipseParameter(particle,"b" , e);
+ Float_t c = GetEllipseParameter(particle,"c" , e);
+ Float_t x0 = GetEllipseParameter(particle,"x0", e);
+ Float_t y0 = GetEllipseParameter(particle,"y0", e);
+
+ Float_t r = TMath::Power((p[0] - x0)/a,2) +
+ TMath::Power((p[1] - y0)/b,2) +
+ c*(p[0] - x0)*(p[1] - y0)/(a*b) ;
+ //3 different ellipses defined
+ if((effPur==2) && (r<1./2.)) prinbit= 1;
+ if((effPur==1) && (r<2. )) prinbit= 1;
+ if((effPur==0) && (r<9./2.)) prinbit= 1;
- // Looks for the Purity-Efficiency point (possible options "HIGH EFFICIENCY"
- // "MEDIUM EFFICIENCY" "LOW EFFICIENCY" and 3 more options changing
- // EFFICIENCY by PURITY)
-
- Int_t eff_pur = -1 ;
-
- if(Eff_Pur.Contains("HIGH EFFICIENCY") ||Eff_Pur.Contains("LOW PURITY") )
- eff_pur = 0 ;
- else if(Eff_Pur.Contains("MEDIUM EFFICIENCY") ||Eff_Pur.Contains("MEDIUM PURITY") )
- eff_pur = 1 ;
- else if(Eff_Pur.Contains("LOW EFFICIENCY")||Eff_Pur.Contains("HIGH PURITY") )
- eff_pur = 2 ;
- else{
- eff_pur = -1;
- cout<<"Invalid Efficiency-Purity option"<<endl;
- cout<<"Possible options: HIGH EFFICIENCY = LOW PURITY"<<endl;
- cout<<" MEDIUM EFFICIENCY = MEDIUM PURITY"<<endl;
- cout<<" LOW EFFICIENCY = HIGH PURITY"<<endl;
- }
+ if(r<0)
+ Error("GetPrincipalBit", "Negative square?") ;
+
+ return prinbit;
- return eff_pur;
}
//____________________________________________________________________________
+const Int_t AliPHOSPIDv1::GetHardPhotonBit(AliPHOSEmcRecPoint * emc) const
+{
+ // Set bit for identified hard photons (E > 30 GeV)
+ // if the second moment M2x is below the boundary
+
+ Float_t e = emc->GetEnergy();
+ if (e < 30.0) return 0;
+ Float_t m2x = emc->GetM2x();
+ Float_t m2xBoundary = GetParameterPhotonBoundary(0) *
+ TMath::Exp(-TMath::Power(e-GetParameterPhotonBoundary(1),2)/2.0/
+ TMath::Power(GetParameterPhotonBoundary(2),2)) +
+ GetParameterPhotonBoundary(3);
+ Info("GetHardPhotonBit","E=%f, m2x=%f, boundary=%f",e,m2x,m2xBoundary);
+ if (m2x < m2xBoundary)
+ return 1;// A hard photon
+ else
+ return 0;// Not a hard photon
+}
-void AliPHOSPIDv1::Exec(Option_t * option)
+//____________________________________________________________________________
+const Int_t AliPHOSPIDv1::GetHardPi0Bit(AliPHOSEmcRecPoint * emc) const
{
- //Steering method
+ // Set bit for identified hard pi0 (E > 30 GeV)
+ // if the second moment M2x is above the boundary
+
+ Float_t e = emc->GetEnergy();
+ if (e < 30.0) return 0;
+ Float_t m2x = emc->GetM2x();
+ Float_t m2xBoundary = GetParameterPi0Boundary(0) +
+ e * GetParameterPi0Boundary(1);
+ Info("GetHardPi0Bit","E=%f, m2x=%f, boundary=%f",e,m2x,m2xBoundary);
+ if (m2x > m2xBoundary)
+ return 1;// A hard pi0
+ else
+ return 0;// Not a hard pi0
+}
+
+//____________________________________________________________________________
+TVector3 AliPHOSPIDv1::GetMomentumDirection(AliPHOSEmcRecPoint * emc, AliPHOSRecPoint * )const
+{
+ // Calculates the momentum direction:
+ // 1. if only a EMC RecPoint, direction is given by IP and this RecPoint
+ // 2. if a EMC RecPoint and CPV RecPoint, direction is given by the line through the 2 recpoints
+ // However because of the poor position resolution of PPSD the direction is always taken as if we were
+ // in case 1.
+
+ TVector3 dir(0,0,0) ;
- if( strcmp(GetName(), "")== 0 )
- Init() ;
+ TVector3 emcglobalpos ;
+ TMatrix dummy ;
- if(strstr(option,"tim"))
- gBenchmark->Start("PHOSPID");
+ emc->GetGlobalPosition(emcglobalpos, dummy) ;
- if(strstr(option,"print")) {
- Print("") ;
- return ;
- }
-
-
-// gAlice->GetEvent(0) ;
-
-// //check, if the branch with name of this" already exits?
-// if (gAlice->TreeR()) {
-// TObjArray * lob = (TObjArray*)gAlice->TreeR()->GetListOfBranches() ;
-// TIter next(lob) ;
-// TBranch * branch = 0 ;
-// Bool_t phospidfound = kFALSE, pidfound = kFALSE ;
-
-// TString taskName(GetName()) ;
-// taskName.Remove(taskName.Index(Version())-1) ;
-
-// while ( (branch = (TBranch*)next()) && (!phospidfound || !pidfound) ) {
-// if ( (strcmp(branch->GetName(), "PHOSPID")==0) && (strcmp(branch->GetTitle(), taskName.Data())==0) )
-// phospidfound = kTRUE ;
-
-// else if ( (strcmp(branch->GetName(), "AliPHOSPID")==0) && (strcmp(branch->GetTitle(), taskName.Data())==0) )
-// pidfound = kTRUE ;
-// }
-
-// if ( phospidfound || pidfound ) {
-// cerr << "WARNING: AliPHOSPIDv1::Exec -> RecParticles and/or PIDtMaker branch with name "
-// << taskName.Data() << " already exits" << endl ;
-// return ;
-// }
-// }
-
-// Int_t nevents = (Int_t) gAlice->TreeE()->GetEntries() ;
-// Int_t ievent ;
-// AliPHOSGetter * gime = AliPHOSGetter::GetInstance() ;
-
- AliPHOSGetter * gime = AliPHOSGetter::GetInstance() ;
- if(gime->BranchExists("RecParticles") )
- return ;
- Int_t nevents = gime->MaxEvent() ; //(Int_t) gAlice->TreeE()->GetEntries() ;
- Int_t ievent ;
-
- for(ievent = 0; ievent < nevents; ievent++){
- gime->Event(ievent,"R") ;
-
- MakeRecParticles() ;
-
- WriteRecParticles(ievent);
-
- if(strstr(option,"deb"))
- PrintRecParticles(option) ;
+ dir = emcglobalpos ;
+ dir.SetZ( -dir.Z() ) ; // why ?
+ dir.SetMag(1.) ;
- //increment the total number of rec particles per run
- fRecParticlesInRun += gime->RecParticles(BranchName())->GetEntriesFast() ;
+ //account correction to the position of IP
+ Float_t xo,yo,zo ; //Coordinates of the origin
+ gAlice->Generator()->GetOrigin(xo,yo,zo) ;
+ TVector3 origin(xo,yo,zo);
+ dir = dir - origin ;
- }
-
- if(strstr(option,"tim")){
- gBenchmark->Stop("PHOSPID");
- cout << "AliPHOSPID:" << endl ;
- cout << " took " << gBenchmark->GetCpuTime("PHOSPID") << " seconds for PID "
- << gBenchmark->GetCpuTime("PHOSPID")/nevents << " seconds per event " << endl ;
- cout << endl ;
- }
-
+ return dir ;
}
//____________________________________________________________________________
-void AliPHOSPIDv1::MakeRecParticles(){
-
+void AliPHOSPIDv1::MakeRecParticles()
+{
// Makes a RecParticle out of a TrackSegment
- AliPHOSGetter * gime = AliPHOSGetter::GetInstance() ;
+ AliPHOSGetter * gime = AliPHOSGetter::Instance() ;
TObjArray * emcRecPoints = gime->EmcRecPoints() ;
TObjArray * cpvRecPoints = gime->CpvRecPoints() ;
TClonesArray * trackSegments = gime->TrackSegments() ;
if ( !emcRecPoints || !cpvRecPoints || !trackSegments ) {
- cerr << "ERROR: AliPHOSPIDv1::MakeRecParticles -> RecPoints or TrackSegments not found ! " << endl ;
- abort() ;
+ Fatal("MakeRecParticles", "RecPoints or TrackSegments not found !") ;
}
TClonesArray * recParticles = gime->RecParticles() ;
recParticles->Clear();
-
TIter next(trackSegments) ;
AliPHOSTrackSegment * ts ;
// Choose the cluster energy range
- // YK: check if (emc != 0) !!!
if (!emc) {
- cerr << "ERROR: AliPHOSPIDv1::MakeRecParticles -> emc("
- <<ts->GetEmcIndex()<<") = " <<emc<< endl;
- abort();
+ Fatal("MakeRecParticles", "-> emc(%d) = %d", ts->GetEmcIndex(), emc ) ;
}
- Float_t e = emc->GetEnergy() ;
-
- GetAnalysisParameters(e);// Gives value to fCluster, fClusterrcpv, fMatrixExtraRow, and to fPrincipal and fParameters depending on the energy.
-
- if((fCluster== -1)||(fClusterrcpv == -1)) continue ;
+
+ Float_t e = emc->GetEnergy() ;
Float_t lambda[2] ;
emc->GetElipsAxis(lambda) ;
+
+ if((lambda[0]>0.01) && (lambda[1]>0.01)){
+ // Looking PCA. Define and calculate the data (X),
+ // introduce in the function X2P that gives the components (P).
+
+ Float_t Spher = 0. ;
+ Float_t Emaxdtotal = 0. ;
+
+ if((lambda[0]+lambda[1])!=0)
+ Spher=fabs(lambda[0]-lambda[1])/(lambda[0]+lambda[1]);
+
+ Emaxdtotal=emc->GetMaximalEnergy()/emc->GetEnergy();
+
+ fX[0] = lambda[0] ;
+ fX[1] = lambda[1] ;
+ fX[2] = emc->GetDispersion() ;
+ fX[3] = Spher ;
+ fX[4] = emc->GetMultiplicity() ;
+ fX[5] = Emaxdtotal ;
+ fX[6] = emc->GetCoreEnergy() ;
+
+ fPrincipalPhoton->X2P(fX,fPPhoton);
+ fPrincipalPi0 ->X2P(fX,fPPi0);
+
+ }
+ else{
+ fPPhoton[0]=-100.0; //We do not accept clusters with
+ fPPhoton[1]=-100.0; //one cell as a photon-like
+ fPPi0[0] =-100.0;
+ fPPi0[1] =-100.0;
+ }
+
Float_t time =emc->GetTime() ;
- if((lambda[0]>0.01) && (lambda[1]>0.01) && time > 0.){
+ // Loop of Efficiency-Purity (the 3 points of purity or efficiency
+ // are taken into account to set the particle identification)
+ for(Int_t effPur = 0; effPur < 3 ; effPur++){
+
+ // Looking at the CPV detector. If RCPV greater than CpvEmcDistance,
+ // 1st,2nd or 3rd bit (depending on the efficiency-purity point )
+ // is set to 1
+ if(GetCPVBit(emc, cpv, effPur,e) == 1 )
+ rp->SetPIDBit(effPur) ;
- // Loop of Efficiency-Purity (the 3 points of purity or efficiency are taken
- // into account to set the particle identification)
- for(Int_t eff_pur = 0; eff_pur < 3 ; eff_pur++){
-
- // Looking at the CPV detector. If RCPV greater than CpvEmcDistance, 1st,
- // 2nd or 3rd bit (depending on the efficiency-purity point )is set to 1 .
-
- if(GetDistance(emc, cpv, "R") > (*fParameters)(fClusterrcpv,eff_pur) )
- rp->SetPIDBit(eff_pur) ;
-
- // Looking the TOF. If TOF smaller than gate, 4th, 5th or 6th
- // bit (depending on the efficiency-purity point )is set to 1
- if(time< (*fParameters)(fCluster+3+fMatrixExtraRow,eff_pur))
- rp->SetPIDBit(eff_pur+3) ;
-
- // Looking PCA. Define and calculate the data (X), introduce in the function
- // X2P that gives the components (P).
- Float_t Spher = 0. ;
- Float_t Emaxdtotal = 0. ;
-
- if((lambda[0]+lambda[1])!=0) Spher=fabs(lambda[0]-lambda[1])/(lambda[0]+lambda[1]);
-
- Emaxdtotal=emc->GetMaximalEnergy()/emc->GetEnergy();
-
- fX[0] = lambda[0] ;
- fX[1] = lambda[1] ;
- fX[2] = emc->GetDispersion() ;
- fX[3] = Spher ;
- fX[4] = emc->GetMultiplicity() ;
- fX[5] = Emaxdtotal ;
- fX[6] = emc->GetCoreEnergy() ;
-
- fPrincipal->X2P(fX,fP);
-
- //If we are inside the ellipse, 7th, 8th or 9th
- // bit (depending on the efficiency-purity point )is set to 1
- if(GetPrincipalSign(fP,fCluster+fMatrixExtraRow,eff_pur) == 1)
- rp->SetPIDBit(eff_pur+6) ;
-
- }
+ // Looking the TOF. If TOF smaller than gate, 4th, 5th or 6th
+ // bit (depending on the efficiency-purity point )is set to 1
+ if(time< (*fParameters)(2,effPur))
+ rp->SetPIDBit(effPur+3) ;
+
+ //Photon PCA
+ //If we are inside the ellipse, 7th, 8th or 9th
+ // bit (depending on the efficiency-purity point )is set to 1
+ if(GetPrincipalBit("photon",fPPhoton,effPur,e) == 1)
+ rp->SetPIDBit(effPur+6) ;
+
+ //Pi0 PCA
+ //If we are inside the ellipse, 10th, 11th or 12th
+ // bit (depending on the efficiency-purity point )is set to 1
+ if(GetPrincipalBit("pi0" ,fPPi0 ,effPur,e) == 1)
+ rp->SetPIDBit(effPur+9) ;
}
+ if(GetHardPhotonBit(emc))
+ rp->SetPIDBit(12) ;
+ if(GetHardPi0Bit (emc))
+ rp->SetPIDBit(13) ;
//Set momentum, energy and other parameters
- Float_t encal = CalibratedEnergy(e);
+ Float_t encal = GetCalibratedEnergy(e);
TVector3 dir = GetMomentumDirection(emc,cpv) ;
dir.SetMag(encal) ;
rp->SetMomentum(dir.X(),dir.Y(),dir.Z(),encal) ;
rp->SetPolarisation(0,0,0);
index++ ;
}
-
}
-
+
//____________________________________________________________________________
-void AliPHOSPIDv1:: Print()
+void AliPHOSPIDv1::Print() const
{
// Print the parameters used for the particle type identification
- cout << "=============== AliPHOSPID1 ================" << endl ;
- cout << "Making PID "<< endl ;
-// cout << " Headers file: " << fHeaderFileName.Data() << endl ;
-// cout << " RecPoints branch title: " << fRecPointsTitle.Data() << endl ;
-// cout << " TrackSegments Branch title: " << fTrackSegmentsTitle.Data() << endl ;
-// cout << " RecParticles Branch title " << fRecParticlesTitle.Data() << endl;
-
- cout << " Pricipal analysis file from 0.5 to 5 " << fFileName5.Data() << endl;
- cout << " Name of parameters file "<<fFileNamePar5.Data() << endl ;
- cout << " Matrix of Parameters: "<<endl;
- cout << " 3 Columns [High Eff-Low Pur,Medium Eff-Pur, Low Eff-High Pur]"<<endl;
- cout << " 21 Rows, each 3 [ RCPV, TOF, X_Center, Y_Center, A, B, Angle ]"<<endl;
- fParameters5->Print() ;
-
- cout << " Pricipal analysis file from 5 to 100 " << fFileName100.Data() << endl;
- cout << " Name of parameters file "<<fFileNamePar100.Data() << endl ;
- cout << " Matrix of Parameters: "<<endl;
- cout << " 3 Columns [High Eff-Low Pur,Medium Eff-Pur, Low Eff-High Pur]"<<endl;
- cout << " 22 Rows, [ 4 RCPV, 3 TOF, 3 X_Center, 3 Y_Center, 3 A, 3 B, 3 Angle ]"<<endl;
- fParameters100->Print() ;
-
- cout << " Energy Calibration Parameters A + B* E + C * E^2"<<endl;
- cout << " E is the energy from the cluster "<<endl;
- cout << " A = "<< fACalParameter << endl;
- cout << " B = "<< fBCalParameter << endl;
- cout << " C = "<< fCCalParameter << endl;
- cout << "============================================" << endl ;
+
+ Info("Print", "=============== AliPHOSPIDv1 ================") ;
+ printf("Making PID\n") ;
+ printf(" Pricipal analysis file from 0.5 to 100 %s\n", fFileNamePrincipalPhoton.Data() ) ;
+ printf(" Name of parameters file %s\n", fFileNameParameters.Data() ) ;
+ printf(" Matrix of Parameters: 14x4\n") ;
+ printf(" Energy Calibration 1x3 [3 parametres to calibrate energy: A + B* E + C * E^2]\n") ;
+ printf(" RCPV 2x3 rows x and z, columns function cut parameters\n") ;
+ printf(" TOF 1x3 [High Eff-Low Pur,Medium Eff-Pur, Low Eff-High Pur]\n") ;
+ printf(" PCA 5x4 [5 ellipse parametres and 4 parametres to calculate them: A/Sqrt(E) + B* E + C * E^2 + D]\n") ;
+ Printf(" Pi0 PCA 5x3 [5 ellipse parametres and 3 parametres to calculate them: A + B* E + C * E^2]\n") ;
+ fParameters->Print() ;
}
+
+
//____________________________________________________________________________
-void AliPHOSPIDv1::WriteRecParticles(Int_t event)
+void AliPHOSPIDv1::PrintRecParticles(Option_t * option)
{
-
- AliPHOSGetter *gime = AliPHOSGetter::GetInstance() ;
+ // Print table of reconstructed particles
+
+ AliPHOSGetter *gime = AliPHOSGetter::Instance() ;
TClonesArray * recParticles = gime->RecParticles() ;
- recParticles->Expand(recParticles->GetEntriesFast() ) ;
- TTree * treeR ;
-
- if(fToSplit){
- if(!fSplitFile)
- return ;
- fSplitFile->cd() ;
- char name[10] ;
- sprintf(name,"%s%d", "TreeR",event) ;
- treeR = dynamic_cast<TTree*>(fSplitFile->Get(name));
- }
- else{
- treeR = gAlice->TreeR();
- }
-
- if(!treeR){
- gAlice->MakeTree("R", fSplitFile);
- treeR = gAlice->TreeR() ;
- }
-
- //First rp
- Int_t bufferSize = 32000 ;
- TBranch * rpBranch = treeR->Branch("PHOSRP",&recParticles,bufferSize);
- rpBranch->SetTitle(BranchName());
-
- //second, pid
- Int_t splitlevel = 0 ;
- AliPHOSPIDv1 * pid = this ;
- TBranch * pidBranch = treeR->Branch("AliPHOSPID","AliPHOSPIDv1",&pid,bufferSize,splitlevel);
- pidBranch->SetTitle(BranchName());
-
- rpBranch->Fill() ;
- pidBranch->Fill() ;
-
- treeR->AutoSave() ; //Write(0,kOverwrite) ;
- if(gAlice->TreeR()!=treeR){
- treeR->Delete();
+ TString message ;
+ message = "\nevent " ;
+ message += gAlice->GetEvNumber() ;
+ message += " found " ;
+ message += recParticles->GetEntriesFast();
+ message += " RecParticles\n" ;
+
+ if(strstr(option,"all")) { // printing found TS
+ message += "\n PARTICLE Index \n" ;
+
+ Int_t index ;
+ for (index = 0 ; index < recParticles->GetEntries() ; index++) {
+ AliPHOSRecParticle * rp = (AliPHOSRecParticle * ) recParticles->At(index) ;
+ message += "\n" ;
+ message += rp->Name().Data() ;
+ message += " " ;
+ message += rp->GetIndexInList() ;
+ message += " " ;
+ message += rp->GetType() ;
+ }
}
+ Info("Print", message.Data() ) ;
}
//____________________________________________________________________________
-TVector3 AliPHOSPIDv1::GetMomentumDirection(AliPHOSEmcRecPoint * emc, AliPHOSRecPoint * cpv)const
-{
- // Calculates the momentum direction:
- // 1. if only a EMC RecPoint, direction is given by IP and this RecPoint
- // 2. if a EMC RecPoint and CPV RecPoint, direction is given by the line through the 2 recpoints
- // However because of the poor position resolution of PPSD the direction is always taken as if we were
- // in case 1.
+void AliPHOSPIDv1::SetParameters()
+{
+ // PCA : To do the Principal Components Analysis it is necessary
+ // the Principal file, which is opened here
+ fX = new double[7]; // Data for the PCA
+ fPPhoton = new double[7]; // Eigenvalues of the PCA
+ fPPi0 = new double[7]; // Eigenvalues of the Pi0 PCA
- TVector3 dir(0,0,0) ;
-
- TVector3 emcglobalpos ;
- TMatrix dummy ;
-
- emc->GetGlobalPosition(emcglobalpos, dummy) ;
+ // Read photon principals from the photon file
+ fFileNamePrincipalPhoton = "$ALICE_ROOT/PHOS/PCA8pa15_0.5-100.root" ;
+ TFile f( fFileNamePrincipalPhoton.Data(), "read" ) ;
+ fPrincipalPhoton = dynamic_cast<TPrincipal*> (f.Get("principal")) ;
+ f.Close() ;
- dir = emcglobalpos ;
- dir.SetZ( -dir.Z() ) ; // why ?
- dir.SetMag(1.) ;
+ // Read pi0 principals from the pi0 file
+
+ fFileNamePrincipalPi0 = "$ALICE_ROOT/PHOS/PCA_pi0_40-120.root" ;
+ TFile fPi0( fFileNamePrincipalPi0.Data(), "read" ) ;
+ fPrincipalPi0 = dynamic_cast<TPrincipal*> (fPi0.Get("principal")) ;
+ fPi0.Close() ;
+
+ // Open parameters file and initialization of the Parameters matrix.
+ // In the File Parameters.dat are all the parameters. These are introduced
+ // in a matrix of 16x4
+ //
+ // All the parameters defined in this file are, in order of row:
+ // line 0 : calibration
+ // lines 1,2 : CPV rectangular cat for X and Z
+ // line 3 : TOF cut
+ // lines 4-8 : parameters to calculate photon PCA ellipse
+ // lines 9-13: parameters to calculate pi0 PCA ellipse
+ // lines 14-15: parameters to calculate border for high-pt photons and pi0
+
+ fFileNameParameters = gSystem->ExpandPathName("$ALICE_ROOT/PHOS/Parameters.dat");
+ fParameters = new TMatrix(16,4) ;
+ const Int_t maxLeng=255;
+ char string[maxLeng];
+
+ // Open a text file with PID parameters
+ FILE *fd = fopen(fFileNameParameters.Data(),"r");
+ if (!fd)
+ Fatal("SetParameter","File %s with a PID parameters cannot be opened\n",
+ fFileNameParameters.Data());
+
+ Int_t i=0;
+ // Read parameter file line-by-line and skip empty line and comments
+ while (fgets(string,maxLeng,fd) != NULL) {
+ if (string[0] == '\n' ) continue;
+ if (string[0] == '!' ) continue;
+ sscanf(string, "%f %f %f %f",
+ &(*fParameters)(i,0), &(*fParameters)(i,1),
+ &(*fParameters)(i,2), &(*fParameters)(i,3));
+ i++;
+ //printf("line %d: %s",i,string);
+ }
+ fclose(fd);
+}
- //account correction to the position of IP
- Float_t xo,yo,zo ; //Coordinates of the origin
- gAlice->Generator()->GetOrigin(xo,yo,zo) ;
- TVector3 origin(xo,yo,zo);
- dir = dir - origin ;
+//____________________________________________________________________________
+void AliPHOSPIDv1::SetParameterCalibration(Int_t i,Float_t param)
+{
+ // Set parameter "Calibration" i to a value param
+ if(i>2 || i<0)
+ Error("SetParameterCalibration","Invalid parameter number: %d",i);
+ else
+ (*fParameters)(0,i) = param ;
+}
- return dir ;
+//____________________________________________________________________________
+void AliPHOSPIDv1::SetParameterCpv2Emc(Int_t i, TString axis, Float_t cut)
+{
+ // Set the parameters to calculate Cpv-to-Emc Distance Cut depending on
+ // Purity-Efficiency point i
+
+ if(i>2 || i<0)
+ Error("SetParameterCpv2Emc","Invalid parameter number: %d",i);
+ else {
+ axis.ToLower();
+ if (axis == "x") (*fParameters)(1,i) = cut;
+ else if (axis == "z") (*fParameters)(2,i) = cut;
+ else Error("SetParameterCpv2Emc","Invalid axis name: %s",axis.Data());
+ }
}
+
//____________________________________________________________________________
-void AliPHOSPIDv1::PrintRecParticles(Option_t * option)
+void AliPHOSPIDv1::SetParameterPhotonBoundary(Int_t i,Float_t param)
{
- // Print table of reconstructed particles
+ // Set parameter "Hard photon boundary" i to a value param
+ if(i>4 || i<0)
+ Error("SetParameterPhotonBoundary","Invalid parameter number: %d",i);
+ else
+ (*fParameters)(14,i) = param ;
+}
- AliPHOSGetter *gime = AliPHOSGetter::GetInstance() ;
+//____________________________________________________________________________
+void AliPHOSPIDv1::SetParameterPi0Boundary(Int_t i,Float_t param)
+{
+ // Set parameter "Hard pi0 boundary" i to a value param
+ if(i>1 || i<0)
+ Error("SetParameterPi0Boundary","Invalid parameter number: %d",i);
+ else
+ (*fParameters)(15,i) = param ;
+}
- TClonesArray * recParticles = gime->RecParticles(BranchName()) ;
-
- cout << "AliPHOSPIDv1: event "<<gAlice->GetEvNumber() << endl ;
- cout << " found " << recParticles->GetEntriesFast() << " RecParticles " << endl ;
-
- if(strstr(option,"all")) { // printing found TS
-
- cout << " PARTICLE "
- << " Index " << endl ;
-
- Int_t index ;
- for (index = 0 ; index < recParticles->GetEntries() ; index++) {
- AliPHOSRecParticle * rp = (AliPHOSRecParticle * ) recParticles->At(index) ;
+//_____________________________________________________________________________
+void AliPHOSPIDv1::SetParameterTimeGate(Int_t i, Float_t gate)
+{
+ // Set the parameter TimeGate depending on Purity-Efficiency point i
+ if (i>2 || i<0)
+ Error("SetParameterTimeGate","Invalid Efficiency-Purity choice %d",i);
+ else
+ (*fParameters)(3,i)= gate ;
+}
- cout << std::setw(10) << rp->Name() << " "
- << std::setw(5) << rp->GetIndexInList() << " " <<endl;
- cout << "Type "<< rp->GetType() << endl;
- }
- cout << "-------------------------------------------" << endl ;
- }
+//_____________________________________________________________________________
+void AliPHOSPIDv1::SetParameterToCalculateEllipse(TString particle, TString param, Int_t i, Float_t par)
+{
+ // Set the parameter "i" that is needed to calculate the ellipse
+ // parameter "param" for a particle "particle"
+ particle.ToLower();
+ param. ToLower();
+ Int_t p= -1;
+ Int_t offset=0;
+
+ if (particle == "photon") offset=0;
+ else if (particle == "pi0") offset=5;
+ else
+ Error("SetParameterToCalculateEllipse","Wrong particle name: %s (choose from pi0/photon)\n",particle.Data());
+
+ if (param.Contains("a")) p=4+offset;
+ else if(param.Contains("b")) p=5+offset;
+ else if(param.Contains("c")) p=6+offset;
+ else if(param.Contains("x0"))p=7+offset;
+ else if(param.Contains("y0"))p=8+offset;
+ if((i>4)||(i<0))
+ Error("SetEllipseParameter", "No parameter with index %d", i) ;
+ else if(p==-1)
+ Error("SetEllipseParameter", "No parameter with name %s", param.Data() ) ;
+ else
+ (*fParameters)(p,i) = par ;
+}
+
+//____________________________________________________________________________
+void AliPHOSPIDv1::Unload()
+{
+ AliPHOSGetter * gime = AliPHOSGetter::Instance() ;
+ gime->PhosLoader()->UnloadRecPoints() ;
+ gime->PhosLoader()->UnloadTracks() ;
+ gime->PhosLoader()->UnloadRecParticles() ;
}
+//____________________________________________________________________________
+void AliPHOSPIDv1::WriteRecParticles()
+{
+
+ AliPHOSGetter *gime = AliPHOSGetter::Instance() ;
+ TClonesArray * recParticles = gime->RecParticles() ;
+ recParticles->Expand(recParticles->GetEntriesFast() ) ;
+ TTree * treeP = gime->TreeP();
+
+ //First rp
+ Int_t bufferSize = 32000 ;
+ TBranch * rpBranch = treeP->Branch("PHOSRP",&recParticles,bufferSize);
+ rpBranch->SetTitle(BranchName());
+
+ rpBranch->Fill() ;
+
+ gime->WriteRecParticles("OVERWRITE");
+ gime->WritePID("OVERWRITE");
+}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff