//_________________________________________________________________________
// Implementation version v1 of the PHOS particle identifier
-// Identification is based on information from PPSD and EMC
+// Particle identification based on the
+// - 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.
+//
+// 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")
+// 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)
+// 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 "TFile.h"
+#include "TF2.h"
+#include "TFormula.h"
+#include "TCanvas.h"
+#include "TFolder.h"
+#include "TSystem.h"
+#include "TBenchmark.h"
+#include "TMatrixD.h"
+#include "TPrincipal.h"
+#include "TSystem.h"
// --- Standard library ---
-#include <iostream.h>
// --- AliRoot header files ---
+#include "AliGenerator.h"
+#include "AliPHOS.h"
#include "AliPHOSPIDv1.h"
+#include "AliPHOSClusterizerv1.h"
#include "AliPHOSTrackSegment.h"
+#include "AliPHOSTrackSegmentMakerv1.h"
#include "AliPHOSRecParticle.h"
-#include "AliPHOSIndexToObject.h"
+#include "AliPHOSGeometry.h"
+#include "AliPHOSGetter.h"
ClassImp( AliPHOSPIDv1)
//____________________________________________________________________________
-void AliPHOSPIDv1::MakeParticles(AliPHOSTrackSegment::TrackSegmentsList * trsl,
- AliPHOSRecParticle::RecParticlesList * rpl)
+AliPHOSPIDv1::AliPHOSPIDv1():AliPHOSPID()
+{
+ // default ctor
+
+ InitParameters() ;
+ fDefaultInit = kTRUE ;
+}
+
+//____________________________________________________________________________
+AliPHOSPIDv1::AliPHOSPIDv1(const AliPHOSPIDv1 & pid ):AliPHOSPID(pid)
+{
+ // ctor
+ InitParameters() ;
+ Init() ;
+
+}
+
+//____________________________________________________________________________
+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 allocations that are not possible in default constructor
+ // Add the PID task to the list of PHOS tasks
+
+ AliPHOSGetter * gime = AliPHOSGetter::Instance(GetTitle(), fEventFolderName.Data()) ;
+
+ if ( !gime->PID() )
+ gime->PostPID(this) ;
+}
+
+//____________________________________________________________________________
+void AliPHOSPIDv1::InitParameters()
+{
+ // Initialize PID parameters
+ fRecParticlesInRun = 0 ;
+ fNEvent = 0 ;
+ fRecParticlesInRun = 0 ;
+ SetParameters() ; // fill the parameters matrix from parameters file
+ SetEventRange(0,-1) ;
+}
+
+//________________________________________________________________________
+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 ;
+ }
+
+
+ AliPHOSGetter * gime = AliPHOSGetter::Instance() ;
+
+ if (fLastEvent == -1) fLastEvent = gime->MaxEvent() - 1 ;
+ else fLastEvent = TMath::Min(fLastEvent,gime->MaxEvent());
+ Int_t nEvents = fLastEvent - fFirstEvent + 1;
+
+ for (Int_t ievent = fFirstEvent; ievent <= fLastEvent; 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() ;
+ }
+ }
+ 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();
+}
+
+//____________________________________________________________________________
+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;
+}
+
+//____________________________________________________________________________
+const 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;
+}
+
+//____________________________________________________________________________
+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 ;
+
+}
+
+//____________________________________________________________________________
+const 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());
+ }
+ return param;
+}
+
+//____________________________________________________________________________
+const 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;
+}
+
+//____________________________________________________________________________
+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);
+ }
+
+ 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;
+}
+
+//____________________________________________________________________________
+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;
+}
+
+//____________________________________________________________________________
+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;
+}
+
+//_____________________________________________________________________________
+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());
+
+ 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;
+}
+
+
+//____________________________________________________________________________
+const 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::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 ;
+}
+//____________________________________________________________________________
+const Int_t AliPHOSPIDv1::GetCPVBit(AliPHOSEmcRecPoint * emc,AliPHOSRecPoint * cpv,const 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
+}
+
+//____________________________________________________________________________
+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;
+
+ if(r<0)
+ Error("GetPrincipalBit", "Negative square?") ;
+
+ return prinbit;
+
+}
+//____________________________________________________________________________
+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
+}
+
+//____________________________________________________________________________
+const 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
+}
+
+//____________________________________________________________________________
+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) ;
+
+ TVector3 emcglobalpos ;
+ TMatrix dummy ;
+
+ emc->GetGlobalPosition(emcglobalpos, dummy) ;
+
+
+ dir = emcglobalpos ;
+ dir.SetZ( -dir.Z() ) ; // why ?
+ 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()
{
// 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(trsl) ;
- AliPHOSTrackSegment * tracksegment ;
+ TIter next(trackSegments) ;
+ AliPHOSTrackSegment * ts ;
Int_t index = 0 ;
AliPHOSRecParticle * rp ;
- Int_t type ;
- Int_t showerprofile; // 0 narrow and 1 wide
- Int_t cpvdetector; // 1 hit and 0 no hit
- Int_t pcdetector; // 1 hit and 0 no hit
-
- while ( (tracksegment = (AliPHOSTrackSegment *)next()) ) {
- new( (*rpl)[index] ) AliPHOSRecParticle(tracksegment) ;
- rp = (AliPHOSRecParticle *)rpl->At(index) ;
- AliPHOSEmcRecPoint * recp = tracksegment->GetEmcRecPoint() ;
- Float_t * lambda = new Float_t[2];
- recp->GetElipsAxis(lambda) ;
-
- // Looking at the lateral development of the shower
- if ( ( lambda[0] > fLambda1m && lambda[0] < fLambda1M ) && // shower profile cut
- ( lambda[1] > fLambda2m && lambda[1] < fLambda2M ) )
- showerprofile = 0 ; // NARROW PROFILE
- else
- showerprofile = 1 ;// WIDE PROFILE
-
- // Looking at the photon conversion detector
- if( tracksegment->GetPpsdLowRecPoint() == 0 )
- pcdetector = 0 ; // No hit
- else
- pcdetector = 1 ; // hit
-
- // Looking at the photon conversion detector
- if( tracksegment->GetPpsdUpRecPoint() == 0 )
- cpvdetector = 0 ; // No hit
- else
- cpvdetector = 1 ; // Hit
-
- type = showerprofile + 2 * pcdetector + 4 * cpvdetector ;
- rp->SetType(type) ;
+ while ( (ts = (AliPHOSTrackSegment *)next()) ) {
+
+ new( (*recParticles)[index] ) AliPHOSRecParticle() ;
+ rp = (AliPHOSRecParticle *)recParticles->At(index) ;
+ rp->SetTrackSegment(index) ;
+ rp->SetIndexInList(index) ;
+
+ AliPHOSEmcRecPoint * emc = 0 ;
+ if(ts->GetEmcIndex()>=0)
+ emc = (AliPHOSEmcRecPoint *) emcRecPoints->At(ts->GetEmcIndex()) ;
+
+ AliPHOSRecPoint * cpv = 0 ;
+ if(ts->GetCpvIndex()>=0)
+ cpv = (AliPHOSRecPoint *) cpvRecPoints->At(ts->GetCpvIndex()) ;
+
+ // Now set type (reconstructed) of the particle
+
+ // Choose the cluster energy range
+
+ if (!emc) {
+ Fatal("MakeRecParticles", "-> emc(%d) = %d", ts->GetEmcIndex(), emc ) ;
+ }
+
+ 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() ;
+
+ // 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)(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 = 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);
index++ ;
}
+}
+
+//____________________________________________________________________________
+void AliPHOSPIDv1::Print() const
+{
+ // Print the parameters used for the particle type identification
+
+ 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::PrintRecParticles(Option_t * option)
+{
+ // 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() ;
+ }
+ }
+ Info("Print", message.Data() ) ;
}
//____________________________________________________________________________
-void AliPHOSPIDv1:: Print(const char * opt)
+void AliPHOSPIDv1::SetParameters()
{
- // Print the parameters used for the particle type identification
+ // 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
+
+ // 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() ;
+
+ // 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);
+}
+
+//____________________________________________________________________________
+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::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::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 ;
+}
+
+//____________________________________________________________________________
+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 ;
+}
+
+//_____________________________________________________________________________
+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"
- cout << "AliPHOSPIDv1 : cuts for the particle idendification based on the shower profile " << endl
- << fLambda1m << " < value1 < " << fLambda1M << endl
- << fLambda2m << " < value2 < " << fLambda2M << endl ;
+ 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::SetShowerProfileCuts(Float_t l1m, Float_t l1M, Float_t l2m, Float_t l2M)
+void AliPHOSPIDv1::WriteRecParticles()
{
- // Modifies the parameters used for the particle type identification
+
+ AliPHOSGetter *gime = AliPHOSGetter::Instance() ;
- fLambda1m = l1m ;
- fLambda1M = l1M ;
- fLambda2m = l2m ;
- fLambda2M = l2M ;
+ 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