//_________________________________________________________________________
// Implementation version v1 of the PHOS particle identifier
// Particle identification based on the
-// - CPV information,
-// - Preshower information (in MIX or GPS2 geometries)
-// - shower width.
-
-// CPV or Preshower cluster should be clother in PHOS plane than fCpvEmcDistance (in cm).
-// This variable can be set by method SetCpvtoEmcDistanceCut(Float_t cut)
+// - RCPV: distance from CPV recpoint to EMCA recpoint.
+// - TOF
+// - 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 > CpvEmcDistance (each bit corresponds
+// to a different efficiency-purity point of the photon identification)
+// -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 the parameters a, b, c, x0 and y0.
+// (each bit corresponds to a different efficiency-purity point of the
+// 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 through the study of the reconstructed
+// energy distribution of monoenergetic photons.
//
-// One can set desirable ID method by the function SetIdentificationMethod(option).
-// Now the following options can be used together or separately :
-// - "disp": use dispersion cut on shower width
-// (width can be set by method SetDispersionCut(Float_t cut)
-// - "ell" : use cut on the axis of the ellipse, drown around shower
-// (this cut can be changed by SetShowerProfileCut(char* formula),
-// where formula - any function of two variables f(lambda[0],lambda[1]).
-// Shower is considered as EM if f() > 0 )
-// One can visualize current cuts calling method PlotDispersionCuts().
+// 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.
//
-// usercase:
-// root [0] AliPHOSPIDv1 * p1 = new AliPHOSPIDv1("galice.root")
-// Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated
-// root [1] p1->SetIdentificationMethod("disp ellipse")
-// root [2] p1->ExecuteTask()
-// root [3] AliPHOSPIDv1 * p2 = new AliPHOSPIDv1("galice1.root","ts1")
-// Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated
-// // reading headers from file galice1.root and TrackSegments
-// // with title "ts1"
-// root [4] p2->SetRecParticlesBranch("rp1")
-// // set file name for the branch RecParticles
-// root [5] p2->ExecuteTask("deb all time")
-// // available options
-// // "deb" - prints # of reconstructed particles
-// // "deb all" - prints # and list of RecParticles
-// // "time" - prints benchmarking results
+// use case:
+// root [0] AliPHOSPIDv1 * p = new AliPHOSPIDv1("galice1.root")
+// Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated
+// // 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
//
-//*-- Author: Yves Schutz (SUBATECH) & Gines Martinez (SUBATECH) &
-// Dmitri Peressounko (SUBATECH & Kurchatov Institute)
-// Complitely redesined by Dmitri Peressounko, March 2001
+// root [2] AliPHOSPIDv1 * p2 = new AliPHOSPIDv1("galice1.root","v1",kTRUE)
+// Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated
+// //Split mode.
+// root [3] p2->ExecuteTask()
+//
+
+//*-- 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"
#include "TFolder.h"
#include "TSystem.h"
#include "TBenchmark.h"
+#include "TMatrixD.h"
+#include "TPrincipal.h"
+#include "TSystem.h"
+
// --- Standard library ---
-#include <iostream.h>
-#include <iomanip.h>
// --- AliRoot header files ---
-#include "AliRun.h"
#include "AliGenerator.h"
#include "AliPHOS.h"
#include "AliPHOSPIDv1.h"
#include "AliPHOSClusterizerv1.h"
+#include "AliPHOSEmcRecPoint.h"
#include "AliPHOSTrackSegment.h"
#include "AliPHOSTrackSegmentMakerv1.h"
#include "AliPHOSRecParticle.h"
+#include "AliPHOSGeometry.h"
+#include "AliPHOSGetter.h"
ClassImp( AliPHOSPIDv1)
//____________________________________________________________________________
AliPHOSPIDv1::AliPHOSPIDv1():AliPHOSPID()
{
- fIsInitialized = kFALSE ;
+ // default ctor
+
+ InitParameters() ;
+ fDefaultInit = kTRUE ;
}
//____________________________________________________________________________
-AliPHOSPIDv1::AliPHOSPIDv1(const char * headeFile,const char * tsBranchTitle):AliPHOSPID()
+AliPHOSPIDv1::AliPHOSPIDv1(const AliPHOSPIDv1 & pid ):AliPHOSPID(pid)
{
-
- fHeaderFileName = headeFile ;
-
- fTSTitle = tsBranchTitle ;
-
- SetName("AliPHOSPID") ;
- SetTitle("version1") ;
-
- TFile * file = (TFile*) gROOT->GetFile(fHeaderFileName.Data() ) ;
-
- if(file == 0){
- if(fHeaderFileName.Contains("rfio")) // if we read file using HPSS
- file = TFile::Open(fHeaderFileName.Data(),"update") ;
- else
- file = new TFile(fHeaderFileName.Data(),"update") ;
- gAlice = (AliRun *) file->Get("gAlice") ;
- }
-
- AliPHOS * phos = (AliPHOS *) gAlice->GetDetector("PHOS") ;
- fGeom = AliPHOSGeometry::GetInstance(phos->GetGeometry()->GetName(),phos->GetGeometry()->GetTitle() );
-
- fTrackSegments = new TClonesArray("AliPHOSTrackSegment",1) ;
- fTSMaker = 0 ;
- fEmcRecPoints = new TObjArray(1) ;
- fCpvRecPoints = new TObjArray(1) ;
- fClusterizer = 0 ;
- fRecParticles = new TClonesArray("AliPHOSRecParticle",100) ;
-
- fFormula = new TFormula("LambdaCuts","(x>1)*(x<3)*(y>0)*(y<x)") ;
-
- // add Task to //root/Tasks folder
- TTask * roottasks = (TTask*)gROOT->GetRootFolder()->FindObject("Tasks") ;
- roottasks->Add(this) ;
+ // ctor
+ InitParameters() ;
+ Init() ;
- fDispersion = 2.0;
- fCpvEmcDistance = 3.0 ;
- fIsInitialized = kTRUE ;
+}
+//____________________________________________________________________________
+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
+ delete [] fX ; // Principal input
+ delete [] fPPhoton ; // Photon Principal components
+ delete [] fPPi0 ; // Pi0 Principal components
}
+//____________________________________________________________________________
+const TString AliPHOSPIDv1::BranchName() const
+{
+
+ return GetName() ;
+}
+
//____________________________________________________________________________
void AliPHOSPIDv1::Init()
{
- // Make all memory allocationa not possible in default constructor
- if(!fIsInitialized){
- if(fHeaderFileName.IsNull())
- fHeaderFileName = "galice.root" ;
-
- TFile * file = (TFile*) gROOT->GetFile(fHeaderFileName.Data() ) ;
-
- if(file == 0){
- file = new TFile(fHeaderFileName.Data(),"update") ;
- gAlice = (AliRun *) file->Get("gAlice") ;
- }
-
- AliPHOS * phos = (AliPHOS *) gAlice->GetDetector("PHOS") ;
- fGeom = AliPHOSGeometry::GetInstance(phos->GetGeometry()->GetName(),phos->GetGeometry()->GetTitle() );
-
- fTrackSegments = new TClonesArray("AliPHOSTrackSegment",1) ;
- fTSMaker = new AliPHOSTrackSegmentMakerv1() ;
- fEmcRecPoints = new TObjArray(1) ;
- fCpvRecPoints = new TObjArray(1) ;
- fClusterizer = new AliPHOSClusterizerv1() ;
- fRecParticles = new TClonesArray("AliPHOSRecParticle",100) ;
-
- fFormula = new TFormula("LambdaCuts","(x>1)*(x<2.5)*(y>0)*(y<x)") ;
-
- // add Task to //root/Tasks folder
- TTask * roottasks = (TTask*)gROOT->GetRootFolder()->FindObject("Tasks") ;
- roottasks->Add(this) ;
+ // Make all memory allocations that are not possible in default constructor
+ // Add the PID task to the list of PHOS tasks
- fDispersion = 2.0;
- fCpvEmcDistance = 3.0 ;
+ AliPHOSGetter * gime = AliPHOSGetter::Instance(GetTitle(), fEventFolderName.Data()) ;
- fIsInitialized = kTRUE ;
- }
+ if ( !gime->PID() )
+ gime->PostPID(this) ;
}
+
//____________________________________________________________________________
-Bool_t AliPHOSPIDv1::ReadTrackSegments()
+void AliPHOSPIDv1::InitParameters()
{
- // Reads TrackSegments an extracts the title of the RecPoints
- // branch from which TS were made.
- // Then reads both TrackSegments and RecPoints.
-
- //Fist read Track Segment Branch and extract RecPointsBranch from fTSMaker
- fTrackSegments->Clear() ;
- fEmcRecPoints->Clear() ;
- fCpvRecPoints->Clear() ;
- fRecParticles->Clear() ;
-
- gAlice->GetEvent(fNEvent) ;
-
- TTree * treeR = gAlice->TreeR() ;
-
- if(treeR==0){
- char treeName[20];
- sprintf(treeName,"TreeR%d",fNEvent);
- cout << "Error in AliPHOSClusterizerv1 : no "<<treeName << endl ;
- cout << " Do nothing " << endl ;
- return kFALSE ;
+ // Initialize PID parameters
+ fRecParticlesInRun = 0 ;
+ fNEvent = 0 ;
+ fRecParticlesInRun = 0 ;
+ SetParameters() ; // fill the parameters matrix from parameters file
+ SetEventRange(0,-1) ;
+ // initialisation of response function parameters
+ // Tof
+ // Photons
+ fTphoton[0] = 2.97E-1 ;
+ fTphoton[1] = 1.55E-8 ;
+ fTphoton[2] = 5.40E-10 ;
+ fTFphoton = new TFormula("ToF response to photon" , "gaus") ;
+ fTFphoton->SetParameters( fTphoton[0], fTphoton[1], fTphoton[2]) ;
+ // Electrons
+ fTelectron[0] = 2.73E-1 ;
+ fTelectron[1] = 1.56E-8 ;
+ fTelectron[2] = 5.70E-10 ;
+ fTFelectron = new TFormula("ToF response to electron" , "gaus") ;
+ fTFelectron->SetParameters( fTelectron[0], fTelectron[1], fTelectron[2]) ;
+ //Charged Hadrons
+ fTchargedhadron[0] = 1.58E-1 ;
+ fTchargedhadron[1] = 1.64E-8 ;
+ fTchargedhadron[2] = 3.59E-10 ;
+ fTFchargedhadron = new TFormula("ToF response to charged hadron" , "landau") ;
+ fTFchargedhadron->SetParameters( fTchargedhadron[0], fTchargedhadron[1], fTchargedhadron[2]) ;
+ //Neutral Hadrons
+ fTneutralhadron[0] = 9.62E-1 ;
+ fTneutralhadron[1] = 1.65E-8 ;
+ fTneutralhadron[2] = 6.46E-10 ;
+ fTFneutralhadron = new TFormula("ToF response to neutral hadron" , "landau") ;
+ fTFneutralhadron->SetParameters( fTneutralhadron[0], fTneutralhadron[1], fTneutralhadron[2]) ;
+}
+
+//________________________________________________________________________
+void AliPHOSPIDv1::Exec(Option_t *option)
+{
+ // Steering method to perform particle reconstruction and identification
+ // for the event range from fFirstEvent to fLastEvent.
+ // This range is optionally set by SetEventRange().
+ // if fLastEvent=-1 (by default), then process events until the end.
+
+ if(strstr(option,"tim"))
+ gBenchmark->Start("PHOSPID");
+
+ if(strstr(option,"print")) {
+ Print() ;
+ return ;
}
- //first read TSMaker branch and extract information about RecPoints Branches
- TBranch * tsMakerBranch = 0;
- TBranch * tsBranch = 0;
- TObjArray * branches = treeR->GetListOfBranches() ;
- Int_t ibranch;
- Bool_t tsMakerNotFound = kTRUE ;
- Bool_t tsNotFound = kTRUE ;
-
- for(ibranch = 0;(ibranch <branches->GetEntries())&&(tsMakerNotFound||tsNotFound);ibranch++){
- if(tsMakerNotFound){
- tsMakerBranch=(TBranch *) branches->At(ibranch) ;
- if( fTSTitle.CompareTo(tsMakerBranch->GetTitle())==0 )
- if( strcmp(tsMakerBranch->GetName(),"AliPHOSTrackSegmentMaker") == 0)
- tsMakerNotFound = kFALSE ;
- }
- if(tsNotFound){
- tsBranch=(TBranch *) branches->At(ibranch) ;
- if( fTSTitle.CompareTo(tsBranch->GetTitle())==0 )
- if( strcmp(tsBranch->GetName(),"PHOSTS") == 0)
- tsNotFound = kFALSE ;
+ AliPHOSGetter * gime = AliPHOSGetter::Instance(GetTitle()) ;
+
+ if (fLastEvent == -1)
+ fLastEvent = gime->MaxEvent() - 1 ;
+ else
+ fLastEvent = TMath::Min(fLastEvent,gime->MaxEvent());
+ Int_t nEvents = fLastEvent - fFirstEvent + 1;
+
+ Int_t ievent ;
+ for (ievent = fFirstEvent; ievent <= fLastEvent; ievent++) {
+ gime->Event(ievent,"TR") ;
+ if(gime->TrackSegments() && //Skip events, where no track segments made
+ gime->TrackSegments()->GetEntriesFast()) {
+ MakeRecParticles() ;
+ MakePID() ;
+ WriteRecParticles();
+ if(strstr(option,"deb"))
+ PrintRecParticles(option) ;
+ //increment the total number of rec particles per run
+ fRecParticlesInRun += gime->RecParticles()->GetEntriesFast() ;
}
}
-
- if(tsMakerNotFound ||tsNotFound ){
- cout << "Can't find Branch with TrackSegmentMaker and TrackSegments " ;
- cout << "Do nothing" <<endl ;
- return kFALSE ;
+ if(strstr(option,"deb"))
+ PrintRecParticles(option);
+ 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();
+}
- tsMakerBranch->SetAddress(&fTSMaker) ;
- tsBranch->SetAddress(&fTrackSegments) ;
+//____________________________________________________________________________
+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;
+}
- treeR->GetEvent(0) ;
+//____________________________________________________________________________
+Float_t AliPHOSPIDv1::GetParameterCalibration(Int_t i) const
+{
+ // 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;
+}
- fRecPointsTitle = fTSMaker->GetRecPointsBranch() ;
+//____________________________________________________________________________
+Float_t AliPHOSPIDv1::GetCalibratedEnergy(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 ;
- //reading now recponts branches
- TBranch * emcBranch = 0;
- TBranch * cpvBranch = 0;
- TBranch * cluBranch = 0;
+}
- Bool_t emcNotFound = kTRUE ;
- Bool_t cpvNotFound = kTRUE ;
- Bool_t cluNotFound = kTRUE ;
-
- for(ibranch = 0;(ibranch <branches->GetEntries())&&(emcNotFound||cpvNotFound||cluNotFound);ibranch++){
- if(emcNotFound){
- emcBranch=(TBranch *) branches->At(ibranch) ;
- if( fRecPointsTitle.CompareTo(emcBranch->GetTitle())==0 )
- if( strcmp(emcBranch->GetName(),"PHOSEmcRP") == 0)
- emcNotFound = kFALSE ;
- }
- if(cpvNotFound){
- cpvBranch=(TBranch *) branches->At(ibranch) ;
- if( fRecPointsTitle.CompareTo(cpvBranch->GetTitle())==0 )
- if( strcmp(cpvBranch->GetName(),"PHOSCpvRP") == 0)
- cpvNotFound = kFALSE ;
- }
- if(cluNotFound){
- cluBranch=(TBranch *) branches->At(ibranch) ;
- if( fRecPointsTitle.CompareTo(cluBranch->GetTitle())==0 )
- if( strcmp(cluBranch->GetName(),"AliPHOSClusterizer") == 0)
- cluNotFound = kFALSE ;
- }
+//____________________________________________________________________________
+Float_t AliPHOSPIDv1::GetParameterCpv2Emc(Int_t i, TString axis) const
+{
+ // 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());
}
-
- if(emcNotFound ||cpvNotFound ||cluNotFound ){
- cout << "Can't find Branch with RecPoints or AliPHOSClusterizer " ;
- cout << "Do nothing" <<endl ;
- return kFALSE ;
+ return param;
+}
+
+//____________________________________________________________________________
+Float_t AliPHOSPIDv1::GetCpv2EmcDistanceCut(TString axis, Float_t e) const
+{
+ // 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;
+}
+
+//____________________________________________________________________________
+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);
}
-
- emcBranch->SetAddress(&fEmcRecPoints) ;
- cpvBranch->SetAddress(&fCpvRecPoints) ;
- cluBranch->SetAddress(&fClusterizer) ;
- treeR->GetEvent(0) ;
- return kTRUE ;
+ if (particle == "photon")
+ value = p[0]/TMath::Sqrt(e) + p[1]*e + p[2]*e*e + p[3];
+ else if (particle == "pi0")
+ value = p[0] + p[1]*e + p[2]*e*e;
+
+ return value;
+}
+
+//_____________________________________________________________________________
+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;
+}
+//____________________________________________________________________________
+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;
+}
+//____________________________________________________________________________
+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;
+}
+//_____________________________________________________________________________
+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());
+
+ Int_t p= -1;
+ Float_t par = 0;
+
+ 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) ;
+
+ return par;
}
+
+
//____________________________________________________________________________
-Float_t AliPHOSPIDv1::GetDistance(AliPHOSEmcRecPoint * emc,AliPHOSRecPoint * cpv, Option_t * Axis)const
+Float_t AliPHOSPIDv1::GetDistance(AliPHOSEmcRecPoint * emc,AliPHOSCpvRecPoint * cpv, Option_t * axis)const
{
// Calculates the distance between the EMC RecPoint and the PPSD RecPoint
-
+
+ const AliPHOSGeometry * geom = AliPHOSGetter::Instance()->PHOSGeometry() ;
TVector3 vecEmc ;
TVector3 vecCpv ;
-
- emc->GetLocalPosition(vecEmc) ;
- cpv->GetLocalPosition(vecCpv) ;
- if(emc->GetPHOSMod() == cpv->GetPHOSMod()){
+ if(cpv){
+ emc->GetLocalPosition(vecEmc) ;
+ cpv->GetLocalPosition(vecCpv) ;
- // Correct to difference in CPV and EMC position due to different distance to center.
- // we assume, that particle moves from center
- Float_t dCPV = fGeom->GetIPtoOuterCoverDistance();
- Float_t dEMC = fGeom->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();
- }
-
+ 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 ;
}
+//____________________________________________________________________________
+Int_t AliPHOSPIDv1::GetCPVBit(AliPHOSEmcRecPoint * emc,AliPHOSCpvRecPoint * cpv, Int_t effPur, Float_t e) const
+{
+ if(effPur>2 || effPur<0)
+ Error("GetCPVBit","Invalid Efficiency-Purity choice %d",effPur);
+
+ Float_t sigX = GetCpv2EmcDistanceCut("X",e);
+ Float_t sigZ = GetCpv2EmcDistanceCut("Z",e);
+
+ 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
+}
//____________________________________________________________________________
-void AliPHOSPIDv1::Exec(Option_t * option)
+Int_t AliPHOSPIDv1::GetPrincipalBit(TString particle, const Double_t* p, Int_t effPur, Float_t e)const
{
- //Steering method
+ //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;
- if(!fIsInitialized)
- Init() ;
+ if(r<0)
+ Error("GetPrincipalBit", "Negative square?") ;
- if(strstr(option,"tim"))
- gBenchmark->Start("PHOSPID");
+ return prinbit;
+}
+//____________________________________________________________________________
+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
+}
- Int_t nEvents = (Int_t) gAlice->TreeE()->GetEntries() ;
+//____________________________________________________________________________
+Int_t AliPHOSPIDv1::GetHardPi0Bit(AliPHOSEmcRecPoint * emc) const
+{
+ // 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
+}
- for(fNEvent = 0 ;fNEvent <nEvents; fNEvent++){
- if(!ReadTrackSegments())
- return ;
- MakeRecParticles() ;
- WriteRecParticles();
- if(strstr(option,"deb"))
- PrintRecParticles(option) ;
- }
+//____________________________________________________________________________
+TVector3 AliPHOSPIDv1::GetMomentumDirection(AliPHOSEmcRecPoint * emc, AliPHOSCpvRecPoint * )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.
- 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 ;
- }
+ TVector3 dir(0,0,0) ;
+
+ TVector3 emcglobalpos ;
+ TMatrix dummy ;
+
+ emc->GetGlobalPosition(emcglobalpos, dummy) ;
+
+
+ dir = emcglobalpos ;
+ dir.SetMag(1.) ;
+ //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 ;
+
+ return dir ;
}
+
//____________________________________________________________________________
-void AliPHOSPIDv1::MakeRecParticles(){
+void AliPHOSPIDv1::MakePID()
+{
+ // construct the PID weight from a Bayesian Method
+
+ Int_t index ;
+ const Int_t kSPECIES = AliESDtrack::kSPECIESN ;
+ Double_t pid[kSPECIES] = {0., 0., 0., 0., 0., 0.} ;
+ Int_t nparticles = AliPHOSGetter::Instance()->RecParticles()->GetEntriesFast() ;
+// const Int_t kMAXPARTICLES = 2000 ;
+// if (nparticles >= kMAXPARTICLES)
+// Error("MakePID", "Change size of MAXPARTICLES") ;
+// Double_t stof[kSPECIES][kMAXPARTICLES] ;
+ Double_t * stof[kSPECIES];
+ for (Int_t i =0; i< kSPECIES; i++)
+ stof[i] = new Double_t[nparticles];
+
+ // make the normalized distribution of pid for this event
+ // w(pid) in the Bayesian formulation
+ for(index = 0 ; index < nparticles ; index ++) {
+ AliPHOSRecParticle * recpar = AliPHOSGetter::Instance()->RecParticle(index) ;
+
+ pid[AliESDtrack::kKaon0] = 0 ;
+
+ if (recpar->IsPhoton() || recpar->IsHardPhoton())
+ pid[AliESDtrack::kPhoton]++ ;
+
+ else if (recpar->IsPi0() || recpar->IsHardPi0())
+ pid[AliESDtrack::kPi0]++ ;
+
+ else if (recpar->IsElectron()) {
+ pid[AliESDtrack::kElectron]++ ;
+ pid[AliESDtrack::kMuon]++ ;
+ }
+
+ else if (recpar->IsChargedHadron()){
+ pid[AliESDtrack::kPion]++ ;
+ pid[AliESDtrack::kKaon]++ ;
+ pid[AliESDtrack::kProton]++ ;
+ }
+
+ else if (recpar->IsNeutralHadron())
+ pid[AliESDtrack::kNeutron]++ ;
+
+ else if (recpar->IsEleCon())
+ pid[AliESDtrack::kEleCon]++ ;
+
+ // now get the signals probability
+ // s(pid) in the Bayesian formulation
+ // Tof
+ stof[AliESDtrack::kPhoton][index] = fTFphoton->Eval(recpar->ToF()) ;
+ stof[AliESDtrack::kPi0][index] = fTFphoton->Eval(recpar->ToF()) ; // pi0 are detected via decay photon
+ stof[AliESDtrack::kElectron][index] = fTFelectron->Eval(recpar->ToF()) ;
+ stof[AliESDtrack::kPion][index] = fTFchargedhadron->Eval(recpar->ToF()) ;
+ stof[AliESDtrack::kKaon][index] = fTFchargedhadron->Eval(recpar->ToF()) ;
+ stof[AliESDtrack::kProton][index] = fTFchargedhadron->Eval(recpar->ToF()) ;
+ stof[AliESDtrack::kNeutron][index] = fTFneutralhadron->Eval(recpar->ToF()) ;
+ stof[AliESDtrack::kEleCon][index] = fTFphoton->Eval(recpar->ToF()) ; // a conversion electron has the photon ToF
+ stof[AliESDtrack::kKaon0][index] = 0 ; // do not know yet what to to with K0
+ stof[AliESDtrack::kMuon][index] = 0 ; // do not know yet what to do with muon
+ }
+ for (index = 0 ; index < kSPECIES ; index++)
+ pid[index] /= nparticles ;
+
+
+ for(index = 0 ; index < nparticles ; index ++) {
+ // calculates the Bayesian weight
+ Int_t jndex ;
+ Double_t wn = 0.0 ;
+ for (jndex = 0 ; jndex < kSPECIES ; jndex++)
+ wn += stof[jndex][index] * pid[jndex] ;
+ AliPHOSRecParticle * recpar = AliPHOSGetter::Instance()->RecParticle(index) ;
+ if (TMath::Abs(wn)>0)
+ for (jndex = 0 ; jndex < kSPECIES ; jndex++) {
+ recpar->SetPID(jndex, stof[jndex][index] * pid[jndex] / wn) ;
+ }
+ }
+ for (Int_t i =0; i< kSPECIES; i++)
+ delete [] stof[i];
+}
+
+//____________________________________________________________________________
+void AliPHOSPIDv1::MakeRecParticles()
+{
// Makes a RecParticle out of a TrackSegment
+
+ AliPHOSGetter * gime = AliPHOSGetter::Instance() ;
+ TObjArray * emcRecPoints = gime->EmcRecPoints() ;
+ TObjArray * cpvRecPoints = gime->CpvRecPoints() ;
+ TClonesArray * trackSegments = gime->TrackSegments() ;
+ if ( !emcRecPoints || !cpvRecPoints || !trackSegments ) {
+ Fatal("MakeRecParticles", "RecPoints or TrackSegments not found !") ;
+ }
+ TClonesArray * recParticles = gime->RecParticles() ;
+ recParticles->Clear();
- TIter next(fTrackSegments) ;
+ TIter next(trackSegments) ;
AliPHOSTrackSegment * ts ;
Int_t index = 0 ;
AliPHOSRecParticle * rp ;
-
- Bool_t ellips = fIDOptions.Contains("ell",TString::kIgnoreCase ) ;
- Bool_t disp = fIDOptions.Contains("dis",TString::kIgnoreCase ) ;
-
while ( (ts = (AliPHOSTrackSegment *)next()) ) {
- new( (*fRecParticles)[index] ) AliPHOSRecParticle() ;
- rp = (AliPHOSRecParticle *)fRecParticles->At(index) ;
- rp->SetTraskSegment(index) ;
-
+ new( (*recParticles)[index] ) AliPHOSRecParticle() ;
+ rp = (AliPHOSRecParticle *)recParticles->At(index) ;
+ rp->SetTrackSegment(index) ;
+ rp->SetIndexInList(index) ;
+
AliPHOSEmcRecPoint * emc = 0 ;
if(ts->GetEmcIndex()>=0)
- emc = (AliPHOSEmcRecPoint *) fEmcRecPoints->At(ts->GetEmcIndex()) ;
+ emc = (AliPHOSEmcRecPoint *) emcRecPoints->At(ts->GetEmcIndex()) ;
- AliPHOSRecPoint * cpv = 0 ;
+ AliPHOSCpvRecPoint * cpv = 0 ;
if(ts->GetCpvIndex()>=0)
- cpv = (AliPHOSRecPoint *) fCpvRecPoints->At(ts->GetCpvIndex()) ;
+ cpv = (AliPHOSCpvRecPoint *) cpvRecPoints->At(ts->GetCpvIndex()) ;
- AliPHOSRecPoint * ppsd = 0 ;
- if(ts->GetPpsdIndex()>=0)
- ppsd= (AliPHOSRecPoint *) fCpvRecPoints->At(ts->GetPpsdIndex()) ;
-
- //set momentum and energy first
- Float_t e = emc->GetEnergy() ;
- TVector3 dir = GetMomentumDirection(emc,cpv,ppsd) ;
- dir.SetMag(e) ;
-
- rp->SetMomentum(dir.X(),dir.Y(),dir.Z(),e) ;
- rp->SetCalcMass(0);
+ Int_t track = 0 ;
+ track = ts->GetTrackIndex() ;
+
+ // Now set type (reconstructed) of the particle
- //now set type (reconstructed) of the particle
- Int_t showerprofile = 0; // 0 narrow and 1 wide
+ // Choose the cluster energy range
- if(ellips){
- Float_t lambda[2] ;
- emc->GetElipsAxis(lambda) ;
- if(fFormula->Eval(lambda[0],lambda[1]) <= 0 )
- showerprofile = 1 ; // not narrow
+ if (!emc) {
+ Fatal("MakeRecParticles", "-> emc(%d) = %d", ts->GetEmcIndex(), emc ) ;
}
+
+ Float_t e = emc->GetEnergy() ;
- if(disp)
- if(emc->GetDispersion() > fDispersion )
- showerprofile = 1 ; // not narrow
+ 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;
+ }
- // Looking at the photon conversion detector
- Int_t pcdetector= 0 ; //1 hit and 0 no hit
- if(ppsd)
- if(GetDistance(emc, ppsd, "R") < fCpvEmcDistance)
- pcdetector = 1 ;
+ Float_t time = emc->GetTime() ;
+ rp->SetTof(time) ;
- // Looking at the CPV detector
- Int_t cpvdetector= 0 ; //1 hit and 0 no hit
- if(cpv)
- if(GetDistance(emc, cpv, "R") < fCpvEmcDistance)
- cpvdetector = 1 ;
+ // 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) ;
+
+ // 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)(3,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) ;
- Int_t type = showerprofile + 2 * pcdetector + 4 * cpvdetector ;
- rp->SetType(type) ;
+ if(track >= 0)
+ rp->SetPIDBit(14) ;
+
+ //Set momentum, energy and other parameters
+ Float_t encal = GetCalibratedEnergy(e);
+ TVector3 dir = GetMomentumDirection(emc,cpv) ;
+ dir.SetMag(encal) ;
+ rp->SetMomentum(dir.X(),dir.Y(),dir.Z(),encal) ;
+ rp->SetCalcMass(0);
+ rp->Name(); //If photon sets the particle pdg name to gamma
+ rp->SetProductionVertex(0,0,0,0);
+ rp->SetFirstMother(-1);
+ rp->SetLastMother(-1);
+ rp->SetFirstDaughter(-1);
+ rp->SetLastDaughter(-1);
+ rp->SetPolarisation(0,0,0);
+ //Set the position in global coordinate system from the RecPoint
+ AliPHOSGeometry * geom = gime->PHOSGeometry() ;
+ AliPHOSTrackSegment * ts = gime->TrackSegment(rp->GetPHOSTSIndex()) ;
+ AliPHOSEmcRecPoint * erp = gime->EmcRecPoint(ts->GetEmcIndex()) ;
+ TVector3 pos ;
+ geom->GetGlobal(erp, pos) ;
+ rp->SetPos(pos);
index++ ;
}
-
}
-
+
//____________________________________________________________________________
-void AliPHOSPIDv1:: Print(Option_t * option) const
+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: " << fTSTitle.Data() << endl ;
- cout << " RecParticles Branch title " << fRecparticlesTitle.Data() << endl;
- cout << "with parameters: " << endl ;
- cout << " Maximal EMC - CPV (PPSD) distance (cm) " << fCpvEmcDistance << endl ;
- if(fIDOptions.Contains("dis",TString::kIgnoreCase ))
- cout << " dispersion cut " << fDispersion << endl ;
- if(fIDOptions.Contains("ell",TString::kIgnoreCase )){
- cout << "Eliptic cuts function: " << endl ;
- cout << fFormula->GetTitle() << endl ;
- }
- cout << "============================================" << endl ;
-}
-//____________________________________________________________________________
-void AliPHOSPIDv1::SetShowerProfileCut(char * formula){
- //set shape of the cut on the axis of ellipce, drown around shouer
- //shower considered "narrow" if Formula(lambda[0],lambda[1]) > 0.
- if(fFormula)
- delete fFormula;
- fFormula = new TFormula("Lambda Cut",formula) ;
+ 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()
+void AliPHOSPIDv1::PrintRecParticles(Option_t * option)
{
- //check, if these branches already exist
- TBranch * pidBranch = 0;
- TBranch * rpBranch = 0;
-
- TObjArray * branches = gAlice->TreeR()->GetListOfBranches() ;
- Int_t ibranch;
- Bool_t pidNotFound = kTRUE ;
- Bool_t rpNotFound = kTRUE ;
-
- for(ibranch = 0;(ibranch <branches->GetEntries())&& pidNotFound && rpNotFound;ibranch++){
- if(pidNotFound){
- pidBranch=(TBranch *) branches->At(ibranch) ;
- if( (strcmp(pidBranch->GetName(),"PHOSPID") == 0) &&
- (fRecparticlesTitle.CompareTo(pidBranch->GetTitle()) == 0) )
- pidNotFound = kFALSE ;
- }
- if(rpNotFound){
- rpBranch=(TBranch *) branches->At(ibranch) ;
- if( (strcmp(rpBranch->GetName(),"PHOSRP") == 0) &&
- (fRecparticlesTitle.CompareTo(rpBranch->GetTitle())==0 ))
- rpNotFound = kFALSE ;
+ // Print table of reconstructed particles
+
+ AliPHOSGetter *gime = AliPHOSGetter::Instance() ;
+
+ TClonesArray * recParticles = gime->RecParticles() ;
+
+ 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() ;
}
}
-
- if(!pidNotFound || !rpNotFound) {
- cout << "AliPHOSPIDv1 error: " << endl ;
- cout << " Branch PHOSRP and PHOSPID with title '"<<fRecparticlesTitle.Data()<<"' already exist "<< endl ;
- cout << " can not overwrite " << endl ;
- return ;
- }
+ Info("Print", message.Data() ) ;
+}
- //Make branch in TreeR for TrackSegments
- char * filename = 0;
- if(gSystem->Getenv("CONFIG_SPLIT_FILE")!=0){ //generating file name
- filename = new char[strlen(gAlice->GetBaseFile())+20] ;
- sprintf(filename,"%s/PHOS.Reco.root",gAlice->GetBaseFile()) ;
- }
+//____________________________________________________________________________
+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
- TDirectory *cwd = gDirectory;
+ // Read photon principals from the photon file
- //First rp
- Int_t bufferSize = 32000 ;
- rpBranch = gAlice->TreeR()->Branch("PHOSRP",&fRecParticles,bufferSize);
- rpBranch->SetTitle(fRecparticlesTitle.Data());
- if (filename) {
- rpBranch->SetFile(filename);
- TIter next( rpBranch->GetListOfBranches());
- while ((rpBranch=(TBranch*)next())) {
- rpBranch->SetFile(filename);
- }
- cwd->cd();
+ fFileNamePrincipalPhoton = "$ALICE_ROOT/PHOS/PCA8pa15_0.5-100.root" ;
+ TFile f( fFileNamePrincipalPhoton.Data(), "read" ) ;
+ fPrincipalPhoton = dynamic_cast<TPrincipal*> (f.Get("principal")) ;
+ f.Close() ;
+
+ // 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++;
+ //Info("SetParameters", "line %d: %s",i,string);
}
+ fclose(fd);
+}
- //second, pid
- Int_t splitlevel = 0 ;
- AliPHOSPIDv1 * pid = this ;
- pidBranch = gAlice->TreeR()->Branch("AliPHOSPID","AliPHOSPIDv1",&pid,bufferSize,splitlevel);
- pidBranch->SetTitle(fRecparticlesTitle.Data());
- if (filename) {
- pidBranch->SetFile(filename);
- TIter next( pidBranch->GetListOfBranches());
- while ((pidBranch=(TBranch*)next())) {
- pidBranch->SetFile(filename);
- }
- cwd->cd();
- }
-
- gAlice->TreeR()->Fill() ;
- gAlice->TreeR()->Write(0,kOverwrite) ;
-
+//____________________________________________________________________________
+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 ;
}
+
//____________________________________________________________________________
-void AliPHOSPIDv1::PlotDispersionCuts()const
+void AliPHOSPIDv1::SetParameterCpv2Emc(Int_t i, TString axis, Float_t cut)
{
- TCanvas* lambdas = new TCanvas("lambdas","Cuts on the elipse axise",200,10,700,500);
-
- if(fIDOptions.Contains("ell",TString::kIgnoreCase ) ){
- TF2 * ell = new TF2("Elliptic Cuts",fFormula->GetName(),0,3,0,3) ;
- ell->SetMinimum(0.0000001) ;
- ell->SetMaximum(0.001) ;
- ell->SetLineStyle(1) ;
- ell->SetLineWidth(2) ;
- ell->Draw() ;
- }
-
- if( fIDOptions.Contains("dis",TString::kIgnoreCase ) ){
- TF2 * dsp = new TF2("dispersion","(y<x)*(x*x+y*y < [0]*[0])",0,3,0,3) ;
- dsp->SetParameter(0,fDispersion) ;
- dsp->SetMinimum(0.0000001) ;
- dsp->SetMaximum(0.001) ;
- dsp->SetLineStyle(1) ;
- dsp->SetLineColor(2) ;
- dsp->SetLineWidth(2) ;
- dsp->SetNpx(200) ;
- dsp->SetNpy(200) ;
- if(fIDOptions.Contains("ell",TString::kIgnoreCase ) )
- dsp->Draw("same") ;
- else
- dsp->Draw() ;
+ // 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());
}
- lambdas->Update();
}
//____________________________________________________________________________
-TVector3 AliPHOSPIDv1::GetMomentumDirection(AliPHOSEmcRecPoint * emc, AliPHOSRecPoint * cpv,AliPHOSRecPoint * ppsd)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 one PPSD RecPoint, direction is given by the line through the 2 recpoints
- // 3. if a EMC RecPoint and two PPSD RecPoints, dirrection is given by the average line through
- // the 2 pairs of recpoints
- // However because of the poor position resolution of PPSD the direction is always taken as if we were
- // in case 1.
+void AliPHOSPIDv1::SetParameterPhotonBoundary(Int_t i,Float_t param)
+{
+ // 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 ;
+}
- TVector3 dir(0,0,0) ;
-
- TVector3 emcglobalpos ;
- TMatrix dummy ;
-
- emc->GetGlobalPosition(emcglobalpos, dummy) ;
-
-
- // The following commeneted code becomes valid once the PPSD provides
- // a reasonable position resolution, at least as good as EMC !
- // TVector3 ppsdlglobalpos ;
- // TVector3 ppsduglobalpos ;
- // if( fPpsdLowRecPoint ){ // certainly a photon that has concerted
- // fPpsdLowRecPoint->GetGlobalPosition(ppsdlglobalpos, mdummy) ;
- // dir = emcglobalpos - ppsdlglobalpos ;
- // if( fPpsdUpRecPoint ){ // not looks like a charged
- // fPpsdUpRecPoint->GetGlobalPosition(ppsduglobalpos, mdummy) ;
- // dir = ( dir + emcglobalpos - ppsduglobalpos ) * 0.5 ;
- // }
- // }
- // else { // looks like a neutral
- // dir = emcglobalpos ;
- // }
-
- dir = emcglobalpos ;
- dir.SetZ( -dir.Z() ) ; // why ?
- dir.SetMag(1.) ;
+//____________________________________________________________________________
+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 ;
+}
- //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::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 ;
+}
+
+//_____________________________________________________________________________
+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 ;
+}
- return dir ;
-}
//____________________________________________________________________________
-void AliPHOSPIDv1::PrintRecParticles(Option_t * option){
+void AliPHOSPIDv1::Unload()
+{
+ AliPHOSGetter * gime = AliPHOSGetter::Instance() ;
+ gime->PhosLoader()->UnloadRecPoints() ;
+ gime->PhosLoader()->UnloadTracks() ;
+ gime->PhosLoader()->UnloadRecParticles() ;
+}
- cout << "AliPHOSPIDv1: " << endl ;
- cout << " found " << fRecParticles->GetEntriesFast() << " RecParticles " << endl ;
+//____________________________________________________________________________
+void AliPHOSPIDv1::WriteRecParticles()
+{
+
+ AliPHOSGetter *gime = AliPHOSGetter::Instance() ;
- if(strstr(option,"all")) { // printing found TS
-
- cout << " PARTICLE "
- << " Index " << endl ;
- // << " X "
- // << " Y "
- // << " Z "
- // << " # of primaries "
- // << " Primaries list " << endl;
-
- Int_t index ;
- for (index = 0 ; index < fRecParticles->GetEntries() ; index++) {
- AliPHOSRecParticle * rp = (AliPHOSRecParticle * ) fRecParticles->At(index) ;
-
- Text_t particle[11];
- switch(rp->GetType()) {
- case AliPHOSFastRecParticle::kNEUTRALEM:
- strcpy( particle, "NEUTRAL_EM");
- break;
- case AliPHOSFastRecParticle::kNEUTRALHA:
- strcpy(particle, "NEUTRAL_HA");
- break;
- case AliPHOSFastRecParticle::kGAMMA:
- strcpy(particle, "GAMMA");
- break ;
- case AliPHOSFastRecParticle::kGAMMAHA:
- strcpy(particle, "GAMMA_H");
- break ;
- case AliPHOSFastRecParticle::kABSURDEM:
- strcpy(particle, "ABSURD_EM") ;
- break ;
- case AliPHOSFastRecParticle::kABSURDHA:
- strcpy(particle, "ABSURD_HA") ;
- break ;
- case AliPHOSFastRecParticle::kELECTRON:
- strcpy(particle, "ELECTRON") ;
- break ;
- case AliPHOSFastRecParticle::kCHARGEDHA:
- strcpy(particle, "CHARGED_HA") ;
- break ;
- }
-
- // Int_t * primaries;
- // Int_t nprimaries;
- // primaries = rp->GetPrimaries(nprimaries);
-
- cout << setw(15) << particle << " "
- << setw(3) << rp->GetIndexInList() << " " ;
- // << setw(4) << nprimaries << " ";
- // for (Int_t iprimary=0; iprimary<nprimaries; iprimary++)
- // cout << setw(4) << primaries[iprimary] << " ";
- cout << endl;
- }
- cout << "-------------------------------------------" << endl ;
- }
+ 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