* provided "as is" without express or implied warranty. *
**************************************************************************/
-/* $Id$ */
-
//_________________________________________________________________________
//
// Implementation of the ITS-SPD trackleter class
// - update to the new algorithm by Mariella and Jan Fiete
// - store also DeltaTheta in the ESD
// - less new and delete calls when creating the needed arrays
+//
+// - RS: to decrease the number of new/deletes the clusters data are stored
+// not in float[6] attached to float**, but in 1-D array.
+// - RS: Clusters are sorted in Z in roder to have the same numbering as in the ITS reco
+// - RS: Clusters used by ESDtrack are flagged, this information is passed to AliMulitiplicity object
+// when storing the tracklets and single cluster info
+// - MN: first MC label of single clusters stored
//_________________________________________________________________________
#include <TClonesArray.h>
#include <TH1F.h>
#include <TH2F.h>
#include <TTree.h>
-#include "TArrayI.h"
+#include <TBits.h>
+#include <TArrayI.h>
+#include <string.h>
#include "AliITSMultReconstructor.h"
#include "AliITSReconstructor.h"
-#include "AliITSsegmentationSPD.h"
#include "AliITSRecPoint.h"
+#include "AliITSRecPointContainer.h"
#include "AliITSgeom.h"
+#include "AliITSgeomTGeo.h"
+#include "AliITSDetTypeRec.h"
+#include "AliESDEvent.h"
+#include "AliESDVertex.h"
+#include "AliESDtrack.h"
+#include "AliMultiplicity.h"
#include "AliLog.h"
#include "TGeoGlobalMagField.h"
#include "AliMagF.h"
+#include "AliESDv0.h"
+#include "AliV0.h"
+#include "AliKFParticle.h"
+#include "AliKFVertex.h"
+#include "AliRefArray.h"
//____________________________________________________________________
ClassImp(AliITSMultReconstructor)
//____________________________________________________________________
AliITSMultReconstructor::AliITSMultReconstructor():
-TObject(),
-fClustersLay1(0),
-fClustersLay2(0),
-fDetectorIndexClustersLay1(0),
-fDetectorIndexClustersLay2(0),
-fOverlapFlagClustersLay1(0),
-fOverlapFlagClustersLay2(0),
+fDetTypeRec(0),fESDEvent(0),fTreeRP(0),fTreeRPMix(0),
fTracklets(0),
fSClusters(0),
-fNClustersLay1(0),
-fNClustersLay2(0),
fNTracklets(0),
fNSingleCluster(0),
-fPhiWindow(0),
-fThetaWindow(0),
+fNSingleClusterSPD2(0),
+fDPhiWindow(0),
+fDThetaWindow(0),
fPhiShift(0),
fRemoveClustersFromOverlaps(0),
fPhiOverlapCut(0),
fZetaOverlapCut(0),
+fPhiRotationAngle(0),
+fScaleDTBySin2T(0),
+fNStdDev(1.0),
+fNStdDevSq(1.0),
+//
+fCutPxDrSPDin(0.1),
+fCutPxDrSPDout(0.15),
+fCutPxDz(0.2),
+fCutDCArz(0.5),
+fCutMinElectronProbTPC(0.5),
+fCutMinElectronProbESD(0.1),
+fCutMinP(0.05),
+fCutMinRGamma(2.),
+fCutMinRK0(1.),
+fCutMinPointAngle(0.98),
+fCutMaxDCADauther(0.5),
+fCutMassGamma(0.03),
+fCutMassGammaNSigma(5.),
+fCutMassK0(0.03),
+fCutMassK0NSigma(5.),
+fCutChi2cGamma(2.),
+fCutChi2cK0(2.),
+fCutGammaSFromDecay(-10.),
+fCutK0SFromDecay(-10.),
+fCutMaxDCA(1.),
+//
fHistOn(0),
fhClustersDPhiAcc(0),
fhClustersDThetaAcc(0),
fhetaTracklets(0),
fhphiTracklets(0),
fhetaClustersLay1(0),
-fhphiClustersLay1(0){
-
- fNFiredChips[0] = 0;
- fNFiredChips[1] = 0;
-
+fhphiClustersLay1(0),
+//
+ fDPhiShift(0),
+ fDPhiWindow2(0),
+ fDThetaWindow2(0),
+ fPartners(0),
+ fAssociatedLay1(0),
+ fMinDists(0),
+ fBlackList(0),
+//
+ fCreateClustersCopy(0),
+ fClustersLoaded(0),
+ fRecoDone(0),
+ fBuildRefs(kTRUE),
+ fStoreSPD2SingleCl(kFALSE),
+ fSPDSeg()
+{
+ // default c-tor
+ for (int i=0;i<2;i++) {
+ fNFiredChips[i] = 0;
+ fClArr[i] = 0;
+ for (int j=0;j<2;j++) fUsedClusLay[i][j] = 0;
+ fDetectorIndexClustersLay[i] = 0;
+ fClusterCopyIndex[i] = 0;
+ fOverlapFlagClustersLay[i] = 0;
+ fNClustersLay[i] = 0;
+ fClustersLay[i] = 0;
+ }
// Method to reconstruct the charged particles multiplicity with the
// SPD (tracklets).
-
-
+
SetHistOn();
- if(AliITSReconstructor::GetRecoParam()) {
+ if (AliITSReconstructor::GetRecoParam()) {
SetPhiWindow(AliITSReconstructor::GetRecoParam()->GetTrackleterPhiWindow());
SetThetaWindow(AliITSReconstructor::GetRecoParam()->GetTrackleterThetaWindow());
SetPhiShift(AliITSReconstructor::GetRecoParam()->GetTrackleterPhiShift());
SetRemoveClustersFromOverlaps(AliITSReconstructor::GetRecoParam()->GetTrackleterRemoveClustersFromOverlaps());
SetPhiOverlapCut(AliITSReconstructor::GetRecoParam()->GetTrackleterPhiOverlapCut());
SetZetaOverlapCut(AliITSReconstructor::GetRecoParam()->GetTrackleterZetaOverlapCut());
+ SetPhiRotationAngle(AliITSReconstructor::GetRecoParam()->GetTrackleterPhiRotationAngle());
+ SetNStdDev(AliITSReconstructor::GetRecoParam()->GetTrackleterNStdDevCut());
+ SetScaleDThetaBySin2T(AliITSReconstructor::GetRecoParam()->GetTrackleterScaleDThetaBySin2T());
+ SetBuildRefs(AliITSReconstructor::GetRecoParam()->GetTrackleterBuildCl2TrkRefs());
+ SetStoreSPD2SingleCl(AliITSReconstructor::GetRecoParam()->GetTrackleterStoreSPD2SingleCl());
+ //
+ SetCutPxDrSPDin(AliITSReconstructor::GetRecoParam()->GetMultCutPxDrSPDin());
+ SetCutPxDrSPDout(AliITSReconstructor::GetRecoParam()->GetMultCutPxDrSPDout());
+ SetCutPxDz(AliITSReconstructor::GetRecoParam()->GetMultCutPxDz());
+ SetCutDCArz(AliITSReconstructor::GetRecoParam()->GetMultCutDCArz());
+ SetCutMinElectronProbTPC(AliITSReconstructor::GetRecoParam()->GetMultCutMinElectronProbTPC());
+ SetCutMinElectronProbESD(AliITSReconstructor::GetRecoParam()->GetMultCutMinElectronProbESD());
+ SetCutMinP(AliITSReconstructor::GetRecoParam()->GetMultCutMinP());
+ SetCutMinRGamma(AliITSReconstructor::GetRecoParam()->GetMultCutMinRGamma());
+ SetCutMinRK0(AliITSReconstructor::GetRecoParam()->GetMultCutMinRK0());
+ SetCutMinPointAngle(AliITSReconstructor::GetRecoParam()->GetMultCutMinPointAngle());
+ SetCutMaxDCADauther(AliITSReconstructor::GetRecoParam()->GetMultCutMaxDCADauther());
+ SetCutMassGamma(AliITSReconstructor::GetRecoParam()->GetMultCutMassGamma());
+ SetCutMassGammaNSigma(AliITSReconstructor::GetRecoParam()->GetMultCutMassGammaNSigma());
+ SetCutMassK0(AliITSReconstructor::GetRecoParam()->GetMultCutMassK0());
+ SetCutMassK0NSigma(AliITSReconstructor::GetRecoParam()->GetMultCutMassK0NSigma());
+ SetCutChi2cGamma(AliITSReconstructor::GetRecoParam()->GetMultCutChi2cGamma());
+ SetCutChi2cK0(AliITSReconstructor::GetRecoParam()->GetMultCutChi2cK0());
+ SetCutGammaSFromDecay(AliITSReconstructor::GetRecoParam()->GetMultCutGammaSFromDecay());
+ SetCutK0SFromDecay(AliITSReconstructor::GetRecoParam()->GetMultCutK0SFromDecay());
+ SetCutMaxDCA(AliITSReconstructor::GetRecoParam()->GetMultCutMaxDCA());
+ //
} else {
SetPhiWindow();
SetThetaWindow();
SetRemoveClustersFromOverlaps();
SetPhiOverlapCut();
SetZetaOverlapCut();
+ SetPhiRotationAngle();
+
+ //
+ SetCutPxDrSPDin();
+ SetCutPxDrSPDout();
+ SetCutPxDz();
+ SetCutDCArz();
+ SetCutMinElectronProbTPC();
+ SetCutMinElectronProbESD();
+ SetCutMinP();
+ SetCutMinRGamma();
+ SetCutMinRK0();
+ SetCutMinPointAngle();
+ SetCutMaxDCADauther();
+ SetCutMassGamma();
+ SetCutMassGammaNSigma();
+ SetCutMassK0();
+ SetCutMassK0NSigma();
+ SetCutChi2cGamma();
+ SetCutChi2cK0();
+ SetCutGammaSFromDecay();
+ SetCutK0SFromDecay();
+ SetCutMaxDCA();
}
-
-
- fClustersLay1 = 0;
- fClustersLay2 = 0;
- fDetectorIndexClustersLay1 = 0;
- fDetectorIndexClustersLay2 = 0;
- fOverlapFlagClustersLay1 = 0;
- fOverlapFlagClustersLay2 = 0;
+ //
fTracklets = 0;
fSClusters = 0;
-
+ //
// definition of histograms
Bool_t oldStatus = TH1::AddDirectoryStatus();
TH1::AddDirectory(kFALSE);
fhphiTracklets = new TH1F("phiTracklets", "phi", 100, 0., 2*TMath::Pi());
fhetaClustersLay1 = new TH1F("etaClustersLay1", "etaCl1", 100,-2.,2.);
fhphiClustersLay1 = new TH1F("phiClustersLay1", "phiCl1", 100, 0., 2*TMath::Pi());
-
+ for (int i=2;i--;) fStoreRefs[i][0] = fStoreRefs[i][1] = kFALSE;
TH1::AddDirectory(oldStatus);
}
//______________________________________________________________________
-AliITSMultReconstructor::AliITSMultReconstructor(const AliITSMultReconstructor &mr) : TObject(mr),
-fClustersLay1(mr.fClustersLay1),
-fClustersLay2(mr.fClustersLay2),
-fDetectorIndexClustersLay1(mr.fDetectorIndexClustersLay1),
-fDetectorIndexClustersLay2(mr.fDetectorIndexClustersLay2),
-fOverlapFlagClustersLay1(mr.fOverlapFlagClustersLay1),
-fOverlapFlagClustersLay2(mr.fOverlapFlagClustersLay2),
-fTracklets(mr.fTracklets),
-fSClusters(mr.fSClusters),
-fNClustersLay1(mr.fNClustersLay1),
-fNClustersLay2(mr.fNClustersLay2),
-fNTracklets(mr.fNTracklets),
-fNSingleCluster(mr.fNSingleCluster),
-fPhiWindow(mr.fPhiWindow),
-fThetaWindow(mr.fThetaWindow),
-fPhiShift(mr.fPhiShift),
-fRemoveClustersFromOverlaps(mr.fRemoveClustersFromOverlaps),
-fPhiOverlapCut(mr.fPhiOverlapCut),
-fZetaOverlapCut(mr.fZetaOverlapCut),
-fHistOn(mr.fHistOn),
-fhClustersDPhiAcc(mr.fhClustersDPhiAcc),
-fhClustersDThetaAcc(mr.fhClustersDThetaAcc),
-fhClustersDPhiAll(mr.fhClustersDPhiAll),
-fhClustersDThetaAll(mr.fhClustersDThetaAll),
-fhDPhiVsDThetaAll(mr.fhDPhiVsDThetaAll),
-fhDPhiVsDThetaAcc(mr.fhDPhiVsDThetaAcc),
-fhetaTracklets(mr.fhetaTracklets),
-fhphiTracklets(mr.fhphiTracklets),
-fhetaClustersLay1(mr.fhetaClustersLay1),
-fhphiClustersLay1(mr.fhphiClustersLay1) {
- // Copy constructor
-
+AliITSMultReconstructor::AliITSMultReconstructor(const AliITSMultReconstructor &mr) :
+AliTrackleter(mr),
+fDetTypeRec(0),fESDEvent(0),fTreeRP(0),fTreeRPMix(0),
+fTracklets(0),
+fSClusters(0),
+fNTracklets(0),
+fNSingleCluster(0),
+fNSingleClusterSPD2(0),
+fDPhiWindow(0),
+fDThetaWindow(0),
+fPhiShift(0),
+fRemoveClustersFromOverlaps(0),
+fPhiOverlapCut(0),
+fZetaOverlapCut(0),
+fPhiRotationAngle(0),
+fScaleDTBySin2T(0),
+fNStdDev(1.0),
+fNStdDevSq(1.0),
+//
+fCutPxDrSPDin(0.1),
+fCutPxDrSPDout(0.15),
+fCutPxDz(0.2),
+fCutDCArz(0.5),
+fCutMinElectronProbTPC(0.5),
+fCutMinElectronProbESD(0.1),
+fCutMinP(0.05),
+fCutMinRGamma(2.),
+fCutMinRK0(1.),
+fCutMinPointAngle(0.98),
+fCutMaxDCADauther(0.5),
+fCutMassGamma(0.03),
+fCutMassGammaNSigma(5.),
+fCutMassK0(0.03),
+fCutMassK0NSigma(5.),
+fCutChi2cGamma(2.),
+fCutChi2cK0(2.),
+fCutGammaSFromDecay(-10.),
+fCutK0SFromDecay(-10.),
+fCutMaxDCA(1.),
+//
+fHistOn(0),
+fhClustersDPhiAcc(0),
+fhClustersDThetaAcc(0),
+fhClustersDPhiAll(0),
+fhClustersDThetaAll(0),
+fhDPhiVsDThetaAll(0),
+fhDPhiVsDThetaAcc(0),
+fhetaTracklets(0),
+fhphiTracklets(0),
+fhetaClustersLay1(0),
+fhphiClustersLay1(0),
+fDPhiShift(0),
+fDPhiWindow2(0),
+fDThetaWindow2(0),
+fPartners(0),
+fAssociatedLay1(0),
+fMinDists(0),
+fBlackList(0),
+//
+fCreateClustersCopy(0),
+fClustersLoaded(0),
+fRecoDone(0),
+fBuildRefs(kTRUE),
+fStoreSPD2SingleCl(kFALSE),
+fSPDSeg()
+ {
+ // Copy constructor :!!! RS ATTENTION: old c-tor reassigned the pointers instead of creating a new copy -> would crash on delete
+ AliError("May not use");
}
//______________________________________________________________________
AliITSMultReconstructor& AliITSMultReconstructor::operator=(const AliITSMultReconstructor& mr){
// Assignment operator
- this->~AliITSMultReconstructor();
- new(this) AliITSMultReconstructor(mr);
+ if (this != &mr) {
+ this->~AliITSMultReconstructor();
+ new(this) AliITSMultReconstructor(mr);
+ }
return *this;
}
delete fhphiTracklets;
delete fhetaClustersLay1;
delete fhphiClustersLay1;
-
- // delete arrays
- for(Int_t i=0; i<fNClustersLay1; i++)
- delete [] fClustersLay1[i];
-
- for(Int_t i=0; i<fNClustersLay2; i++)
- delete [] fClustersLay2[i];
-
- for(Int_t i=0; i<fNTracklets; i++)
- delete [] fTracklets[i];
-
- for(Int_t i=0; i<fNSingleCluster; i++)
- delete [] fSClusters[i];
+ //
+ // delete arrays
+ for(Int_t i=0; i<fNTracklets; i++) delete [] fTracklets[i];
- delete [] fClustersLay1;
- delete [] fClustersLay2;
- delete [] fDetectorIndexClustersLay1;
- delete [] fDetectorIndexClustersLay2;
- delete [] fOverlapFlagClustersLay1;
- delete [] fOverlapFlagClustersLay2;
+ for(Int_t i=0; i<fNSingleCluster; i++) delete [] fSClusters[i];
+
+ //
+ for (int i=0;i<2;i++) {
+ delete[] fClustersLay[i];
+ delete[] fDetectorIndexClustersLay[i];
+ delete[] fClusterCopyIndex[i];
+ delete[] fOverlapFlagClustersLay[i];
+ delete fClArr[i];
+ for (int j=0;j<2;j++) delete fUsedClusLay[i][j];
+ }
delete [] fTracklets;
delete [] fSClusters;
+ //
+ delete[] fPartners; fPartners = 0;
+ delete[] fMinDists; fMinDists = 0;
+ delete fBlackList; fBlackList = 0;
+ //
+}
+
+//____________________________________________________________________
+void AliITSMultReconstructor::Reconstruct(AliESDEvent* esd, TTree* treeRP)
+{
+ if (!treeRP) { AliError(" Invalid ITS cluster tree !\n"); return; }
+ if (!esd) {AliError("ESDEvent is not available, use old reconstructor"); return;}
+ // reset counters
+ if (fMult) delete fMult; fMult = 0;
+ fNClustersLay[0] = 0;
+ fNClustersLay[1] = 0;
+ fNTracklets = 0;
+ fNSingleCluster = 0;
+ fNSingleClusterSPD2 = 0;
+ //
+ fESDEvent = esd;
+ fTreeRP = treeRP;
+ //
+ // >>>> RS: this part is equivalent to former AliITSVertexer::FindMultiplicity
+ //
+ // see if there is a SPD vertex
+ Bool_t isVtxOK=kTRUE, isCosmics=kFALSE;
+ AliESDVertex* vtx = (AliESDVertex*)fESDEvent->GetPrimaryVertexSPD();
+ if (!vtx || vtx->GetNContributors()<1) isVtxOK = kFALSE;
+ if (vtx && strstr(vtx->GetTitle(),"cosmics")) {
+ isVtxOK = kFALSE;
+ isCosmics = kTRUE;
+ }
+ //
+ if (!isVtxOK) {
+ if (!isCosmics) {
+ AliDebug(1,"Tracklets multiplicity not determined because the primary vertex was not found");
+ AliDebug(1,"Just counting the number of cluster-fired chips on the SPD layers");
+ }
+ vtx = 0;
+ }
+ if(vtx){
+ float vtxf[3] = {vtx->GetX(),vtx->GetY(),vtx->GetZ()};
+ FindTracklets(vtxf);
+ }
+ else {
+ FindTracklets(0);
+ }
+ //
+ CreateMultiplicityObject();
}
//____________________________________________________________________
void AliITSMultReconstructor::Reconstruct(TTree* clusterTree, Float_t* vtx, Float_t* /* vtxRes*/) {
//
- // - calls LoadClusterArray that finds the position of the clusters
+ // RS NOTE - this is old reconstructor invocation, to be used from VertexFinder and in analysis mode
+
+ if (fMult) delete fMult; fMult = 0;
+ fNClustersLay[0] = 0;
+ fNClustersLay[1] = 0;
+ fNTracklets = 0;
+ fNSingleCluster = 0;
+ fNSingleClusterSPD2 = 0;
+ //
+ if (!clusterTree) { AliError(" Invalid ITS cluster tree !\n"); return; }
+ //
+ fESDEvent = 0;
+ SetTreeRP(clusterTree);
+ //
+ FindTracklets(vtx);
+ //
+}
+
+
+//____________________________________________________________________
+void AliITSMultReconstructor::ReconstructMix(TTree* clusterTree, TTree* clusterTreeMix, const Float_t* vtx, Float_t*)
+{
+ //
+ // RS NOTE - this is old reconstructor invocation, to be used from VertexFinder and in analysis mode
+
+ if (fMult) delete fMult; fMult = 0;
+ fNClustersLay[0] = 0;
+ fNClustersLay[1] = 0;
+ fNTracklets = 0;
+ fNSingleCluster = 0;
+ fNSingleClusterSPD2 = 0;
+ //
+ if (!clusterTree) { AliError(" Invalid ITS cluster tree !\n"); return; }
+ if (!clusterTreeMix) { AliError(" Invalid ITS cluster tree 2nd event !\n"); return; }
+ //
+ fESDEvent = 0;
+ SetTreeRP(clusterTree);
+ SetTreeRPMix(clusterTreeMix);
+ //
+ FindTracklets(vtx);
+ //
+}
+
+
+//____________________________________________________________________
+void AliITSMultReconstructor::FindTracklets(const Float_t *vtx)
+{
+ // - calls LoadClusterArrays that finds the position of the clusters
// (in global coord)
+
// - convert the cluster coordinates to theta, phi (seen from the
- // interaction vertex).
+ // interaction vertex). Clusters in the inner layer can be now
+ // rotated for combinatorial studies
// - makes an array of tracklets
//
// After this method has been called, the clusters of the two layers
// and the tracklets can be retrieved by calling the Get'er methods.
- // reset counters
- fNClustersLay1 = 0;
- fNClustersLay2 = 0;
- fNTracklets = 0;
- fNSingleCluster = 0;
-
- // loading the clusters
- LoadClusterArrays(clusterTree);
- const Double_t pi = TMath::Pi();
-
- // dPhi shift is field dependent
- // get average magnetic field
- Float_t bz = 0;
- AliMagF* field = 0;
- if (TGeoGlobalMagField::Instance())
- field = dynamic_cast<AliMagF*>(TGeoGlobalMagField::Instance()->GetField());
- if (!field)
- {
- AliError("Could not retrieve magnetic field. Assuming no field. Delta Phi shift will be deactivated in AliITSMultReconstructor.")
- }
- else
- bz = TMath::Abs(field->SolenoidField());
-
- const Double_t dPhiShift = fPhiShift / 5 * bz;
- AliDebug(1, Form("Using phi shift of %f", dPhiShift));
-
- const Double_t dPhiWindow2 = fPhiWindow * fPhiWindow;
- const Double_t dThetaWindow2 = fThetaWindow * fThetaWindow;
-
- Int_t* partners = new Int_t[fNClustersLay2];
- Float_t* minDists = new Float_t[fNClustersLay2];
- Int_t* associatedLay1 = new Int_t[fNClustersLay1];
- TArrayI** blacklist = new TArrayI*[fNClustersLay1];
+ // Find tracklets converging to vertex
+ //
+ LoadClusterArrays(fTreeRP,fTreeRPMix);
+ // flag clusters used by ESD tracks
+ if (fESDEvent) ProcessESDTracks();
+ fRecoDone = kTRUE;
- for (Int_t i=0; i<fNClustersLay2; i++) {
- partners[i] = -1;
- minDists[i] = 2;
- }
- for (Int_t i=0; i<fNClustersLay1; i++)
- associatedLay1[i] = 0;
- for (Int_t i=0; i<fNClustersLay1; i++)
- blacklist[i] = 0;
+ if (!vtx) return;
+ InitAux();
+
// find the tracklets
AliDebug(1,"Looking for tracklets... ");
- //###########################################################
- // Loop on layer 1 : finding theta, phi and z
- for (Int_t iC1=0; iC1<fNClustersLay1; iC1++) {
- Float_t x = fClustersLay1[iC1][0] - vtx[0];
- Float_t y = fClustersLay1[iC1][1] - vtx[1];
- Float_t z = fClustersLay1[iC1][2] - vtx[2];
-
- Float_t r = TMath::Sqrt(x*x + y*y + z*z);
-
- fClustersLay1[iC1][0] = TMath::ACos(z/r); // Store Theta
- fClustersLay1[iC1][1] = TMath::Pi() + TMath::ATan2(-y,-x); // Store Phi
-
- if (fHistOn) {
- Float_t eta=fClustersLay1[iC1][0];
- eta= TMath::Tan(eta/2.);
- eta=-TMath::Log(eta);
- fhetaClustersLay1->Fill(eta);
- fhphiClustersLay1->Fill(fClustersLay1[iC1][1]);
- }
- }
-
- // Loop on layer 2 : finding theta, phi and r
- for (Int_t iC2=0; iC2<fNClustersLay2; iC2++) {
- Float_t x = fClustersLay2[iC2][0] - vtx[0];
- Float_t y = fClustersLay2[iC2][1] - vtx[1];
- Float_t z = fClustersLay2[iC2][2] - vtx[2];
-
- Float_t r = TMath::Sqrt(x*x + y*y + z*z);
-
- fClustersLay2[iC2][0] = TMath::ACos(z/r); // Store Theta
- fClustersLay2[iC2][1] = TMath::Pi() + TMath::ATan2(-y,-x); // Store Phi
- }
-
- //###########################################################
- Int_t found = 1;
+ ClusterPos2Angles(vtx); // convert cluster position to angles wrt vtx
+ //
+ // Step1: find all tracklets allowing double assocation:
+ int found = 1;
while (found > 0) {
found = 0;
+ for (Int_t iC1=0; iC1<fNClustersLay[0]; iC1++) found += AssociateClusterOfL1(iC1);
+ }
+ //
+ // Step2: store tracklets; remove used clusters
+ for (Int_t iC2=0; iC2<fNClustersLay[1]; iC2++) StoreTrackletForL2Cluster(iC2);
+ //
+ // store unused single clusters of L1 (optionally for L2 too)
+ StoreL1Singles();
+ //
+ AliDebug(1,Form("%d tracklets found", fNTracklets));
+}
- // Step1: find all tracklets allowing double assocation
- // Loop on layer 1
- for (Int_t iC1=0; iC1<fNClustersLay1; iC1++) {
-
- // already used or in the overlap ?
- if (associatedLay1[iC1] != 0 || fOverlapFlagClustersLay1[iC1]) continue;
-
- found++;
-
- // reset of variables for multiple candidates
- Int_t iC2WithBestDist = -1; // reset
- Double_t minDist = 2; // reset
-
- // Loop on layer 2
- for (Int_t iC2=0; iC2<fNClustersLay2; iC2++) {
-
- // in the overlap ?
- if (fOverlapFlagClustersLay2[iC2]) continue;
-
- if (blacklist[iC1]) {
- Bool_t blacklisted = kFALSE;
- for (Int_t i=0; i<blacklist[iC1]->GetSize(); i++) {
- if (blacklist[iC1]->At(i) == iC2) {
- blacklisted = kTRUE;
- break;
- }
- }
- if (blacklisted) continue;
- }
-
- // find the difference in angles
- Double_t dTheta = TMath::Abs(fClustersLay2[iC2][0] - fClustersLay1[iC1][0]);
- Double_t dPhi = TMath::Abs(fClustersLay2[iC2][1] - fClustersLay1[iC1][1]);
- // take into account boundary condition
- if (dPhi>pi) dPhi=2.*pi-dPhi;
-
- if (fHistOn) {
- fhClustersDPhiAll->Fill(dPhi);
- fhClustersDThetaAll->Fill(dTheta);
- fhDPhiVsDThetaAll->Fill(dTheta, dPhi);
- }
-
- dPhi -= dPhiShift;
-
- // make "elliptical" cut in Phi and Theta!
- Float_t d = dPhi*dPhi/dPhiWindow2 + dTheta*dTheta/dThetaWindow2;
-
- // look for the minimum distance: the minimum is in iC2WithBestDist
- if (d<1 && d<minDist) {
- minDist=d;
- iC2WithBestDist = iC2;
- }
- } // end of loop over clusters in layer 2
-
- if (minDist<1) { // This means that a cluster in layer 2 was found that matches with iC1
-
- if (minDists[iC2WithBestDist] > minDist) {
- Int_t oldPartner = partners[iC2WithBestDist];
- partners[iC2WithBestDist] = iC1;
- minDists[iC2WithBestDist] = minDist;
-
- // mark as assigned
- associatedLay1[iC1] = 1;
-
- if (oldPartner != -1) {
- // redo partner search for cluster in L0 (oldPartner), putting this one (iC2WithBestDist) on its blacklist
- if (blacklist[oldPartner] == 0) {
- blacklist[oldPartner] = new TArrayI(1);
- } else blacklist[oldPartner]->Set(blacklist[oldPartner]->GetSize()+1);
-
- blacklist[oldPartner]->AddAt(iC2WithBestDist, blacklist[oldPartner]->GetSize()-1);
-
- // mark as free
- associatedLay1[oldPartner] = 0;
- }
- } else {
- // try again to find a cluster without considering iC2WithBestDist
- if (blacklist[iC1] == 0) {
- blacklist[iC1] = new TArrayI(1);
- }
- else
- blacklist[iC1]->Set(blacklist[iC1]->GetSize()+1);
-
- blacklist[iC1]->AddAt(iC2WithBestDist, blacklist[iC1]->GetSize()-1);
- }
-
- } else // cluster has no partner; remove
- associatedLay1[iC1] = 2;
- } // end of loop over clusters in layer 1
- }
-
- // Step2: store tracklets; remove used clusters
- for (Int_t iC2=0; iC2<fNClustersLay2; iC2++) {
-
- if (partners[iC2] == -1) continue;
-
- if (fOverlapFlagClustersLay1[partners[iC2]] || fOverlapFlagClustersLay2[iC2]) continue;
- if (fRemoveClustersFromOverlaps) FlagClustersInOverlapRegions (partners[iC2],iC2);
-
- fTracklets[fNTracklets] = new Float_t[6];
-
- // use the theta from the clusters in the first layer
- fTracklets[fNTracklets][0] = fClustersLay1[partners[iC2]][0];
- // use the phi from the clusters in the first layer
- fTracklets[fNTracklets][1] = fClustersLay1[partners[iC2]][1];
- // store the difference between phi1 and phi2
- fTracklets[fNTracklets][2] = fClustersLay1[partners[iC2]][1] - fClustersLay2[iC2][1];
-
- // define dphi in the range [0,pi] with proper sign (track charge correlated)
- if (fTracklets[fNTracklets][2] > TMath::Pi())
- fTracklets[fNTracklets][2] = fTracklets[fNTracklets][2]-2.*TMath::Pi();
- if (fTracklets[fNTracklets][2] < -TMath::Pi())
- fTracklets[fNTracklets][2] = fTracklets[fNTracklets][2]+2.*TMath::Pi();
-
- // store the difference between theta1 and theta2
- fTracklets[fNTracklets][3] = fClustersLay1[partners[iC2]][0] - fClustersLay2[iC2][0];
-
- if (fHistOn) {
- fhClustersDPhiAcc->Fill(fTracklets[fNTracklets][2]);
- fhClustersDThetaAcc->Fill(fTracklets[fNTracklets][3]);
- fhDPhiVsDThetaAcc->Fill(fTracklets[fNTracklets][3],fTracklets[fNTracklets][2]);
- }
-
- // find label
- // if equal label in both clusters found this label is assigned
- // if no equal label can be found the first labels of the L1 AND L2 cluster are assigned
- Int_t label1 = 0;
- Int_t label2 = 0;
- while (label2 < 3) {
- if ((Int_t) fClustersLay1[partners[iC2]][3+label1] != -2 && (Int_t) fClustersLay1[partners[iC2]][3+label1] == (Int_t) fClustersLay2[iC2][3+label2])
- break;
- label1++;
- if (label1 == 3) {
- label1 = 0;
- label2++;
+//____________________________________________________________________
+void AliITSMultReconstructor::CreateMultiplicityObject()
+{
+ // create AliMultiplicity object and store it in the ESD event
+ //
+ TBits fastOrFiredMap,firedChipMap;
+ if (fDetTypeRec) {
+ fastOrFiredMap = fDetTypeRec->GetFastOrFiredMap();
+ firedChipMap = fDetTypeRec->GetFiredChipMap(fTreeRP);
+ }
+ //
+ fMult = new AliMultiplicity(fNTracklets,fNSingleCluster,fNFiredChips[0],fNFiredChips[1],fastOrFiredMap);
+ fMult->SetMultTrackRefs( fBuildRefs );
+ fMult->SetSPD2SinglesStored(fStoreSPD2SingleCl);
+ fMult->SetNumberOfSingleClustersSPD2(fNSingleClusterSPD2);
+ // store some details of reco:
+ fMult->SetScaleDThetaBySin2T(fScaleDTBySin2T);
+ fMult->SetDPhiWindow2(fDPhiWindow2);
+ fMult->SetDThetaWindow2(fDThetaWindow2);
+ fMult->SetDPhiShift(fDPhiShift);
+ fMult->SetNStdDev(fNStdDev);
+ //
+ fMult->SetFiredChipMap(firedChipMap);
+ AliITSRecPointContainer* rcont = AliITSRecPointContainer::Instance();
+ fMult->SetITSClusters(0,rcont->GetNClustersInLayer(1,fTreeRP));
+ for(Int_t kk=2;kk<=6;kk++) fMult->SetITSClusters(kk-1,rcont->GetNClustersInLayerFast(kk));
+ //
+ UInt_t shared[100];
+ AliRefArray *refs[2][2] = {{0,0},{0,0}};
+ if (fBuildRefs) {
+ for (int il=2;il--;)
+ for (int it=2;it--;) // tracklet_clusters->track references to stor
+ if (fStoreRefs[il][it]) refs[il][it] = new AliRefArray(fNTracklets,0);
+ }
+ //
+ for (int i=fNTracklets;i--;) {
+ float* tlInfo = fTracklets[i];
+ fMult->SetTrackletData(i,tlInfo);
+ //
+ if (!fBuildRefs) continue; // do we need references?
+ for (int itp=0;itp<2;itp++) {
+ for (int ilr=0;ilr<2;ilr++) {
+ if (!fStoreRefs[ilr][itp]) continue; // nothing to store
+ int clID = int(tlInfo[ilr ? kClID2:kClID1]);
+ int nref = fUsedClusLay[ilr][itp]->GetReferences(clID,shared,100);
+ if (!nref) continue;
+ else if (nref==1) refs[ilr][itp]->AddReference(i,shared[0]);
+ else refs[ilr][itp]->AddReferences(i,shared,nref);
}
}
- if (label2 < 3) {
- AliDebug(AliLog::kDebug, Form("Found label %d == %d for tracklet candidate %d\n", (Int_t) fClustersLay1[partners[iC2]][3+label1], (Int_t) fClustersLay2[iC2][3+label2], fNTracklets));
- fTracklets[fNTracklets][4] = fClustersLay1[partners[iC2]][3+label1];
- fTracklets[fNTracklets][5] = fClustersLay2[iC2][3+label2];
- } else {
- AliDebug(AliLog::kDebug, Form("Did not find label %d %d %d %d %d %d for tracklet candidate %d\n", (Int_t) fClustersLay1[partners[iC2]][3], (Int_t) fClustersLay1[partners[iC2]][4], (Int_t) fClustersLay1[partners[iC2]][5], (Int_t) fClustersLay2[iC2][3], (Int_t) fClustersLay2[iC2][4], (Int_t) fClustersLay2[iC2][5], fNTracklets));
- fTracklets[fNTracklets][4] = fClustersLay1[partners[iC2]][3];
- fTracklets[fNTracklets][5] = fClustersLay2[iC2][3];
- }
-
- if (fHistOn) {
- Float_t eta=fTracklets[fNTracklets][0];
- eta= TMath::Tan(eta/2.);
- eta=-TMath::Log(eta);
- fhetaTracklets->Fill(eta);
- fhphiTracklets->Fill(fTracklets[fNTracklets][1]);
- }
-
- AliDebug(1,Form(" Adding tracklet candidate %d ", fNTracklets));
- AliDebug(1,Form(" Cl. %d of Layer 1 and %d of Layer 2", partners[iC2], iC2));
- fNTracklets++;
-
- associatedLay1[partners[iC2]] = 1;
}
-
- // Delete the following else if you do not want to save Clusters!
- // store the cluster
- for (Int_t iC1=0; iC1<fNClustersLay1; iC1++) {
- if (associatedLay1[iC1]==2||associatedLay1[iC1]==0) {
- fSClusters[fNSingleCluster] = new Float_t[2];
- fSClusters[fNSingleCluster][0] = fClustersLay1[iC1][0];
- fSClusters[fNSingleCluster][1] = fClustersLay1[iC1][1];
- AliDebug(1,Form(" Adding a single cluster %d (cluster %d of layer 1)",
- fNSingleCluster, iC1));
- fNSingleCluster++;
+ if (fBuildRefs) fMult->AttachTracklet2TrackRefs(refs[0][0],refs[0][1],refs[1][0],refs[1][1]);
+ //
+ AliRefArray *refsc[2] = {0,0};
+ if (fBuildRefs) for (int it=2;it--;) if (fStoreRefs[0][it]) refsc[it] = new AliRefArray(fNClustersLay[0]);
+ for (int i=fNSingleCluster;i--;) {
+ float* clInfo = fSClusters[i];
+ fMult->SetSingleClusterData(i,clInfo);
+ //
+ if (!fBuildRefs) continue; // do we need references?
+ int ilr = i>=(fNSingleCluster-fNSingleClusterSPD2) ? 1:0;
+ int clID = int(clInfo[kSCID]);
+ for (int itp=0;itp<2;itp++) {
+ if (!fStoreRefs[ilr][itp]) continue;
+ int nref = fUsedClusLay[ilr][itp]->GetReferences(clID,shared,100);
+ if (!nref) continue;
+ else if (nref==1) refsc[itp]->AddReference(i,shared[0]);
+ else refsc[itp]->AddReferences(i,shared,nref);
}
}
+ //
+ if (fBuildRefs) fMult->AttachCluster2TrackRefs(refsc[0],refsc[1]);
+ fMult->CompactBits();
+ //
+}
- delete[] partners;
- delete[] minDists;
-
- for (Int_t i=0; i<fNClustersLay1; i++)
- if (blacklist[i])
- delete blacklist[i];
- delete[] blacklist;
- AliDebug(1,Form("%d tracklets found", fNTracklets));
+//____________________________________________________________________
+void AliITSMultReconstructor::LoadClusterArrays(TTree* tree, TTree* treeMix)
+{
+ // load cluster info and prepare tracklets arrays
+ //
+ if (AreClustersLoaded()) {AliInfo("Clusters are already loaded"); return;}
+ LoadClusterArrays(tree,0);
+ LoadClusterArrays(treeMix ? treeMix:tree,1);
+ int nmaxT = TMath::Min(fNClustersLay[0], fNClustersLay[1]);
+ if (fTracklets) delete[] fTracklets;
+ fTracklets = new Float_t*[nmaxT];
+ memset(fTracklets,0,nmaxT*sizeof(Float_t*));
+ //
+ if (fSClusters) delete[] fSClusters;
+ int nSlots = GetStoreSPD2SingleCl() ? fNClustersLay[0]+fNClustersLay[1] : fNClustersLay[0];
+ fSClusters = new Float_t*[nSlots];
+ memset(fSClusters,0,nSlots*sizeof(Float_t*));
+ //
+ AliDebug(1,Form("(clusters in layer 1 : %d, layer 2: %d)",fNClustersLay[0],fNClustersLay[1]));
+ AliDebug(1,Form("(cluster-fired chips in layer 1 : %d, layer 2: %d)",fNFiredChips[0],fNFiredChips[1]));
+ SetClustersLoaded();
}
//____________________________________________________________________
-void
-AliITSMultReconstructor::LoadClusterArrays(TTree* itsClusterTree) {
+void AliITSMultReconstructor::LoadClusterArrays(TTree* itsClusterTree, int il)
+{
// This method
- // - gets the clusters from the cluster tree
+ // - gets the clusters from the cluster tree for layer il
// - convert them into global coordinates
// - store them in the internal arrays
// - count the number of cluster-fired chips
-
- AliDebug(1,"Loading clusters and cluster-fired chips ...");
-
- fNClustersLay1 = 0;
- fNClustersLay2 = 0;
- fNFiredChips[0] = 0;
- fNFiredChips[1] = 0;
-
- AliITSsegmentationSPD *seg = new AliITSsegmentationSPD();
-
- TClonesArray* itsClusters = new TClonesArray("AliITSRecPoint");
- TBranch* itsClusterBranch=itsClusterTree->GetBranch("ITSRecPoints");
-
- itsClusterBranch->SetAddress(&itsClusters);
-
- Int_t nItsSubs = (Int_t)itsClusterTree->GetEntries();
- Float_t cluGlo[3]={0.,0.,0.};
-
-
+ //
+ // RS: This method was strongly modified wrt original. In order to have the same numbering
+ // of clusters as in the ITS reco I had to introduce sorting in Z
+ // Also note that now the clusters data are stored not in float[6] attached to float**, but in 1-D array
+ AliDebug(1,Form("Loading clusters and cluster-fired chips for layer %d",il));
+ //
+ fNClustersLay[il] = 0;
+ fNFiredChips[il] = 0;
+ for (int i=2;i--;) fStoreRefs[il][i] = kFALSE;
+ //
+ AliITSRecPointContainer* rpcont = 0;
+ static TClonesArray statITSrec("AliITSRecPoint");
+ static TObjArray clArr(100);
+ TBranch* branch = 0;
+ TClonesArray* itsClusters = 0;
+ //
+ if (!fCreateClustersCopy) {
+ rpcont=AliITSRecPointContainer::Instance();
+ itsClusters = rpcont->FetchClusters(0,itsClusterTree);
+ if(!rpcont->IsSPDActive()){
+ AliWarning("No SPD rec points found, multiplicity not calculated");
+ return;
+ }
+ }
+ else {
+ itsClusters = &statITSrec;
+ branch = itsClusterTree->GetBranch("ITSRecPoints");
+ branch->SetAddress(&itsClusters);
+ if (!fClArr[il]) fClArr[il] = new TClonesArray("AliITSRecPoint",100);
+ delete[] fClusterCopyIndex[il];
+ }
+ //
// count clusters
- // loop over the its subdetectors
- for (Int_t iIts=0; iIts < nItsSubs; iIts++) {
- if (!itsClusterTree->GetEvent(iIts))
- continue;
-
- Int_t nClusters = itsClusters->GetEntriesFast();
- // loop over clusters
+ // loop over the SPD subdetectors
+ int nclLayer = 0;
+ int detMin = TMath::Max(0,AliITSgeomTGeo::GetModuleIndex(il+1,1,1));
+ int detMax = AliITSgeomTGeo::GetModuleIndex(il+2,1,1);
+ for (int idt=detMin;idt<detMax;idt++) {
+ if (!fCreateClustersCopy) itsClusters = rpcont->UncheckedGetClusters(idt);
+ else branch->GetEvent(idt);
+ int nClusters = itsClusters->GetEntriesFast();
+ if (!nClusters) continue;
+ Int_t nClustersInChip[5] = {0,0,0,0,0};
while(nClusters--) {
AliITSRecPoint* cluster = (AliITSRecPoint*)itsClusters->UncheckedAt(nClusters);
-
- Int_t layer = cluster->GetLayer();
- if (layer == 0)
- fNClustersLay1++;
- else if (layer == 1)
- fNClustersLay2++;
+ if (!cluster) continue;
+ if (fCreateClustersCopy) cluster = new ((*fClArr[il])[nclLayer]) AliITSRecPoint(*cluster);
+ clArr.AddAtAndExpand(cluster,nclLayer++);
+ Int_t chipNo = fSPDSeg.GetChipFromLocal(0,cluster->GetDetLocalZ());
+ if(chipNo>=0)nClustersInChip[ chipNo ]++;
}
+ for(Int_t ifChip=5;ifChip--;) if (nClustersInChip[ifChip]) fNFiredChips[il]++;
}
-
- // create arrays
- fClustersLay1 = new Float_t*[fNClustersLay1];
- fDetectorIndexClustersLay1 = new Int_t[fNClustersLay1];
- fOverlapFlagClustersLay1 = new Bool_t[fNClustersLay1];
-
- fClustersLay2 = new Float_t*[fNClustersLay2];
- fDetectorIndexClustersLay2 = new Int_t[fNClustersLay2];
- fOverlapFlagClustersLay2 = new Bool_t[fNClustersLay2];
-
- // no double association allowed
- fTracklets = new Float_t*[TMath::Min(fNClustersLay1, fNClustersLay2)];
- fSClusters = new Float_t*[fNClustersLay1];
-
- for (Int_t i=0; i<fNClustersLay1; i++) {
- fClustersLay1[i] = new Float_t[6];
- fOverlapFlagClustersLay1[i] = kFALSE;
- fSClusters[i] = 0;
- }
-
- for (Int_t i=0; i<fNClustersLay2; i++) {
- fClustersLay2[i] = new Float_t[6];
- fOverlapFlagClustersLay2[i] = kFALSE;
- }
-
- for (Int_t i=0; i<TMath::Min(fNClustersLay1, fNClustersLay2); i++)
- fTracklets[i] = 0;
-
- // fill clusters
- // loop over the its subdetectors
- fNClustersLay1 = 0; // reset to 0
- fNClustersLay2 = 0;
- for (Int_t iIts=0; iIts < nItsSubs; iIts++) {
-
- if (!itsClusterTree->GetEvent(iIts))
- continue;
-
- Int_t nClusters = itsClusters->GetEntriesFast();
-
- // number of clusters in each chip of the current module
- Int_t nClustersInChip[5] = {0,0,0,0,0};
- Int_t layer = 0;
-
- // loop over clusters
- while(nClusters--) {
- AliITSRecPoint* cluster = (AliITSRecPoint*)itsClusters->UncheckedAt(nClusters);
-
- layer = cluster->GetLayer();
- if (layer>1) continue;
-
- cluster->GetGlobalXYZ(cluGlo);
- Float_t x = cluGlo[0];
- Float_t y = cluGlo[1];
- Float_t z = cluGlo[2];
-
- // find the chip for the current cluster
- Float_t locz = cluster->GetDetLocalZ();
- Int_t iChip = seg->GetChipFromLocal(0,locz);
- nClustersInChip[iChip]++;
-
- if (layer==0) {
- fClustersLay1[fNClustersLay1][0] = x;
- fClustersLay1[fNClustersLay1][1] = y;
- fClustersLay1[fNClustersLay1][2] = z;
-
- fDetectorIndexClustersLay1[fNClustersLay1]=iIts;
-
- for (Int_t i=0; i<3; i++)
- fClustersLay1[fNClustersLay1][3+i] = cluster->GetLabel(i);
- fNClustersLay1++;
- }
- if (layer==1) {
- fClustersLay2[fNClustersLay2][0] = x;
- fClustersLay2[fNClustersLay2][1] = y;
- fClustersLay2[fNClustersLay2][2] = z;
-
- fDetectorIndexClustersLay2[fNClustersLay2]=iIts;
-
- for (Int_t i=0; i<3; i++)
- fClustersLay2[fNClustersLay2][3+i] = cluster->GetLabel(i);
- fNClustersLay2++;
- }
-
- }// end of cluster loop
-
- // get number of fired chips in the current module
- if(layer<2)
- for(Int_t ifChip=0; ifChip<5; ifChip++) {
- if(nClustersInChip[ifChip] >= 1) fNFiredChips[layer]++;
+ // sort the clusters in Z (to have the same numbering as in ITS reco
+ Float_t *z = new Float_t[nclLayer];
+ Int_t *index = new Int_t[nclLayer];
+ for (int ic=0;ic<nclLayer;ic++) z[ic] = ((AliITSRecPoint*)clArr[ic])->GetZ();
+ TMath::Sort(nclLayer,z,index,kFALSE);
+ Float_t* clustersLay = new Float_t[nclLayer*kClNPar];
+ Int_t* detectorIndexClustersLay = new Int_t[nclLayer];
+ Bool_t* overlapFlagClustersLay = new Bool_t[nclLayer];
+ if (fCreateClustersCopy) fClusterCopyIndex[il] = new Int_t[nclLayer];
+ //
+ for (int ic=0;ic<nclLayer;ic++) {
+ AliITSRecPoint* cluster = (AliITSRecPoint*)clArr[index[ic]];
+ float* clPar = &clustersLay[ic*kClNPar];
+ //
+ cluster->GetGlobalXYZ( clPar );
+ detectorIndexClustersLay[ic] = cluster->GetDetectorIndex();
+ overlapFlagClustersLay[ic] = kFALSE;
+ for (Int_t i=3;i--;) clPar[kClMC0+i] = cluster->GetLabel(i);
+ if (fCreateClustersCopy) fClusterCopyIndex[il][ic] = index[ic];
+ }
+ clArr.Clear();
+ delete[] z;
+ delete[] index;
+ //
+ if (fOverlapFlagClustersLay[il]) delete[] fOverlapFlagClustersLay[il];
+ fOverlapFlagClustersLay[il] = overlapFlagClustersLay;
+ //
+ if (fDetectorIndexClustersLay[il]) delete[] fDetectorIndexClustersLay[il];
+ fDetectorIndexClustersLay[il] = detectorIndexClustersLay;
+ //
+ if (fBuildRefs) {
+ for (int it=0;it<2;it++) {
+ if (fUsedClusLay[il][it]) delete fUsedClusLay[il][it];
+ fUsedClusLay[il][it] = new AliRefArray(nclLayer);
}
-
- } // end of its "subdetector" loop
-
- if (itsClusters) {
- itsClusters->Delete();
- delete itsClusters;
- delete seg;
- itsClusters = 0;
}
- AliDebug(1,Form("(clusters in layer 1 : %d, layer 2: %d)",fNClustersLay1,fNClustersLay2));
- AliDebug(1,Form("(cluster-fired chips in layer 1 : %d, layer 2: %d)",fNFiredChips[0],fNFiredChips[1]));
+ //
+ if (fClustersLay[il]) delete[] fClustersLay[il];
+ fClustersLay[il] = clustersLay;
+ fNClustersLay[il] = nclLayer;
+ //
}
+
//____________________________________________________________________
-void
-AliITSMultReconstructor::LoadClusterFiredChips(TTree* itsClusterTree) {
- // This method
+void AliITSMultReconstructor::LoadClusterFiredChips(TTree* itsClusterTree) {
+ // This method
// - gets the clusters from the cluster tree
// - counts the number of (cluster)fired chips
fNFiredChips[0] = 0;
fNFiredChips[1] = 0;
- AliITSsegmentationSPD *seg = new AliITSsegmentationSPD();
-
- TClonesArray* itsClusters = new TClonesArray("AliITSRecPoint");
- TBranch* itsClusterBranch=itsClusterTree->GetBranch("ITSRecPoints");
-
- itsClusterBranch->SetAddress(&itsClusters);
+ AliITSRecPointContainer* rpcont=AliITSRecPointContainer::Instance();
+ TClonesArray* itsClusters=NULL;
+ rpcont->FetchClusters(0,itsClusterTree);
+ if(!rpcont->IsSPDActive()){
+ AliWarning("No SPD rec points found, multiplicity not calculated");
+ return;
+ }
- Int_t nItsSubs = (Int_t)itsClusterTree->GetEntries();
-
// loop over the its subdetectors
- for (Int_t iIts=0; iIts < nItsSubs; iIts++) {
-
- if (!itsClusterTree->GetEvent(iIts))
- continue;
-
+ Int_t nSPDmodules=AliITSgeomTGeo::GetModuleIndex(3,1,1);
+ for (Int_t iIts=0; iIts < nSPDmodules; iIts++) {
+ itsClusters=rpcont->UncheckedGetClusters(iIts);
Int_t nClusters = itsClusters->GetEntriesFast();
// number of clusters in each chip of the current module
Int_t nClustersInChip[5] = {0,0,0,0,0};
Int_t layer = 0;
+ Int_t ladder=0;
+ Int_t det=0;
+ AliITSgeomTGeo::GetModuleId(iIts,layer,ladder,det);
+ --layer; // layer is from 1 to 6 in AliITSgeomTGeo, but from 0 to 5 here
+ if(layer<0 || layer >1)continue;
// loop over clusters
while(nClusters--) {
AliITSRecPoint* cluster = (AliITSRecPoint*)itsClusters->UncheckedAt(nClusters);
-
- layer = cluster->GetLayer();
- if (layer>1) continue;
-
+
// find the chip for the current cluster
Float_t locz = cluster->GetDetLocalZ();
- Int_t iChip = seg->GetChipFromLocal(0,locz);
- nClustersInChip[iChip]++;
+ Int_t iChip = fSPDSeg.GetChipFromLocal(0,locz);
+ if (iChip>=0) nClustersInChip[iChip]++;
}// end of cluster loop
// get number of fired chips in the current module
- if(layer<2)
for(Int_t ifChip=0; ifChip<5; ifChip++) {
if(nClustersInChip[ifChip] >= 1) fNFiredChips[layer]++;
}
} // end of its "subdetector" loop
- if (itsClusters) {
- itsClusters->Delete();
- delete itsClusters;
- delete seg;
- itsClusters = 0;
- }
+
AliDebug(1,Form("(cluster-fired chips in layer 1 : %d, layer 2: %d)",fNFiredChips[0],fNFiredChips[1]));
}
//____________________________________________________________________
}
//____________________________________________________________________
-void
-AliITSMultReconstructor::FlagClustersInOverlapRegions (Int_t iC1, Int_t iC2WithBestDist) {
-
+void AliITSMultReconstructor::FlagClustersInOverlapRegions (Int_t iC1, Int_t iC2WithBestDist)
+{
+ // Flags clusters in the overlapping regions
Float_t distClSameMod=0.;
Float_t distClSameModMin=0.;
Int_t iClOverlap =0;
Float_t zproj1=0.;
Float_t zproj2=0.;
Float_t deZproj=0.;
-
+ Float_t* clPar1 = GetClusterLayer1(iC1);
+ Float_t* clPar2B = GetClusterLayer2(iC2WithBestDist);
// Loop on inner layer clusters
- for (Int_t iiC1=0; iiC1<fNClustersLay1; iiC1++) {
- if (!fOverlapFlagClustersLay1[iiC1]) {
+ for (Int_t iiC1=0; iiC1<fNClustersLay[0]; iiC1++) {
+ if (!fOverlapFlagClustersLay[0][iiC1]) {
// only for adjacent modules
- if ((TMath::Abs(fDetectorIndexClustersLay1[iC1]-fDetectorIndexClustersLay1[iiC1])==4)||
- (TMath::Abs(fDetectorIndexClustersLay1[iC1]-fDetectorIndexClustersLay1[iiC1])==76)) {
- Float_t dePhi=TMath::Abs(fClustersLay1[iiC1][1]-fClustersLay1[iC1][1]);
+ if ((TMath::Abs(fDetectorIndexClustersLay[0][iC1]-fDetectorIndexClustersLay[0][iiC1])==4)||
+ (TMath::Abs(fDetectorIndexClustersLay[0][iC1]-fDetectorIndexClustersLay[0][iiC1])==76)) {
+ Float_t *clPar11 = GetClusterLayer1(iiC1);
+ Float_t dePhi=TMath::Abs(clPar11[kClPh]-clPar1[kClPh]);
if (dePhi>TMath::Pi()) dePhi=2.*TMath::Pi()-dePhi;
- zproj1=meanRadiusLay1/TMath::Tan(fClustersLay1[iC1][0]);
- zproj2=meanRadiusLay1/TMath::Tan(fClustersLay1[iiC1][0]);
+ zproj1=meanRadiusLay1/TMath::Tan(clPar1[kClTh]);
+ zproj2=meanRadiusLay1/TMath::Tan(clPar11[kClTh]);
deZproj=TMath::Abs(zproj1-zproj2);
distClSameMod = TMath::Sqrt(TMath::Power(deZproj/fZetaOverlapCut,2)+TMath::Power(dePhi/fPhiOverlapCut,2));
- if (distClSameMod<=1.) fOverlapFlagClustersLay1[iiC1]=kTRUE;
+ if (distClSameMod<=1.) fOverlapFlagClustersLay[0][iiC1]=kTRUE;
// if (distClSameMod<=1.) {
// if (distClSameModMin==0. || distClSameMod<distClSameModMin) {
}
} // end Loop on inner layer clusters
-// if (distClSameModMin!=0.) fOverlapFlagClustersLay1[iClOverlap]=kTRUE;
+// if (distClSameModMin!=0.) fOverlapFlagClustersLay[0][iClOverlap]=kTRUE;
distClSameMod=0.;
distClSameModMin=0.;
iClOverlap =0;
// Loop on outer layer clusters
- for (Int_t iiC2=0; iiC2<fNClustersLay2; iiC2++) {
- if (!fOverlapFlagClustersLay2[iiC2]) {
+ for (Int_t iiC2=0; iiC2<fNClustersLay[1]; iiC2++) {
+ if (!fOverlapFlagClustersLay[1][iiC2]) {
// only for adjacent modules
- if ((TMath::Abs(fDetectorIndexClustersLay2[iC2WithBestDist]-fDetectorIndexClustersLay2[iiC2])==4) ||
- (TMath::Abs(fDetectorIndexClustersLay2[iC2WithBestDist]-fDetectorIndexClustersLay2[iiC2])==156)) {
- Float_t dePhi=TMath::Abs(fClustersLay2[iiC2][1]-fClustersLay2[iC2WithBestDist][1]);
+ Float_t *clPar2 = GetClusterLayer2(iiC2);
+ if ((TMath::Abs(fDetectorIndexClustersLay[1][iC2WithBestDist]-fDetectorIndexClustersLay[1][iiC2])==4) ||
+ (TMath::Abs(fDetectorIndexClustersLay[1][iC2WithBestDist]-fDetectorIndexClustersLay[1][iiC2])==156)) {
+ Float_t dePhi=TMath::Abs(clPar2[kClPh]-clPar2B[kClPh]);
if (dePhi>TMath::Pi()) dePhi=2.*TMath::Pi()-dePhi;
- zproj1=meanRadiusLay2/TMath::Tan(fClustersLay2[iC2WithBestDist][0]);
- zproj2=meanRadiusLay2/TMath::Tan(fClustersLay2[iiC2][0]);
+ zproj1=meanRadiusLay2/TMath::Tan(clPar2B[kClTh]);
+ zproj2=meanRadiusLay2/TMath::Tan(clPar2[kClTh]);
deZproj=TMath::Abs(zproj1-zproj2);
distClSameMod = TMath::Sqrt(TMath::Power(deZproj/fZetaOverlapCut,2)+TMath::Power(dePhi/fPhiOverlapCut,2));
- if (distClSameMod<=1.) fOverlapFlagClustersLay2[iiC2]=kTRUE;
+ if (distClSameMod<=1.) fOverlapFlagClustersLay[1][iiC2]=kTRUE;
// if (distClSameMod<=1.) {
// if (distClSameModMin==0. || distClSameMod<distClSameModMin) {
}
} // end Loop on outer layer clusters
-// if (distClSameModMin!=0.) fOverlapFlagClustersLay2[iClOverlap]=kTRUE;
+// if (distClSameModMin!=0.) fOverlapFlagClustersLay[1][iClOverlap]=kTRUE;
+
+}
+//____________________________________________________________________
+void AliITSMultReconstructor::InitAux()
+{
+ // init arrays/parameters for tracklet reconstruction
+
+ // dPhi shift is field dependent, get average magnetic field
+ Float_t bz = 0;
+ AliMagF* field = 0;
+ if (TGeoGlobalMagField::Instance()) field = dynamic_cast<AliMagF*>(TGeoGlobalMagField::Instance()->GetField());
+ if (!field) {
+ AliError("Could not retrieve magnetic field. Assuming no field. Delta Phi shift will be deactivated in AliITSMultReconstructor.");
+ }
+ else bz = TMath::Abs(field->SolenoidField());
+ fDPhiShift = fPhiShift / 5 * bz;
+ AliDebug(1, Form("Using phi shift of %f", fDPhiShift));
+ //
+ if (fPartners) delete[] fPartners; fPartners = new Int_t[fNClustersLay[1]];
+ if (fMinDists) delete[] fMinDists; fMinDists = new Float_t[fNClustersLay[1]];
+ if (fAssociatedLay1) delete[] fAssociatedLay1; fAssociatedLay1 = new Int_t[fNClustersLay[0]];
+ //
+ if (fBlackList) delete fBlackList; fBlackList = new AliRefArray(fNClustersLay[0]);
+ //
+ // Printf("Vertex in find tracklets...%f %f %f",vtx[0],vtx[1],vtx[2]);
+ for (Int_t i=0; i<fNClustersLay[1]; i++) {
+ fPartners[i] = -1;
+ fMinDists[i] = 2*fNStdDev;
+ }
+ memset(fAssociatedLay1,0,fNClustersLay[0]*sizeof(Int_t));
+ //
+}
+
+//____________________________________________________________________
+void AliITSMultReconstructor::ClusterPos2Angles(const Float_t *vtx)
+{
+ // convert cluster coordinates to angles wrt vertex
+ for (int ilr=0;ilr<2;ilr++) {
+ for (Int_t iC=0; iC<fNClustersLay[ilr]; iC++) {
+ float* clPar = GetClusterOfLayer(ilr,iC);
+ CalcThetaPhi(clPar[kClTh]-vtx[0],clPar[kClPh]-vtx[1],clPar[kClZ]-vtx[2],clPar[kClTh],clPar[kClPh]);
+ if (ilr==0) {
+ clPar[kClPh] = clPar[kClPh] + fPhiRotationAngle; // rotation of inner layer for comb studies
+ if (fHistOn) {
+ Float_t eta = clPar[kClTh];
+ eta= TMath::Tan(eta/2.);
+ eta=-TMath::Log(eta);
+ fhetaClustersLay1->Fill(eta);
+ fhphiClustersLay1->Fill(clPar[kClPh]);
+ }
+ }
+ }
+ }
+ //
+}
+
+//____________________________________________________________________
+Int_t AliITSMultReconstructor::AssociateClusterOfL1(Int_t iC1)
+{
+ // search association of cluster iC1 of L1 with all clusters of L2
+ if (fAssociatedLay1[iC1] != 0) return 0;
+ Int_t iC2WithBestDist = -1; // reset
+ Double_t minDist = 2*fNStdDev; // reset
+ float* clPar1 = GetClusterLayer1(iC1);
+ for (Int_t iC2=0; iC2<fNClustersLay[1]; iC2++) {
+ //
+ if (fBlackList->IsReferred(iC1,iC2)) continue;
+ float* clPar2 = GetClusterLayer2(iC2);
+ //
+ // find the difference in angles
+ Double_t dTheta = TMath::Abs(clPar2[kClTh] - clPar1[kClTh]);
+ Double_t dPhi = TMath::Abs(clPar2[kClPh] - clPar1[kClPh]);
+ // Printf("detheta %f dephi %f", dTheta,dPhi);
+ //
+ if (dPhi>TMath::Pi()) dPhi=2.*TMath::Pi()-dPhi; // take into account boundary condition
+ //
+ if (fHistOn) {
+ fhClustersDPhiAll->Fill(dPhi);
+ fhClustersDThetaAll->Fill(dTheta);
+ fhDPhiVsDThetaAll->Fill(dTheta, dPhi);
+ }
+ Float_t d = CalcDist(dPhi,dTheta,clPar1[kClTh]); // make "elliptical" cut in Phi and Theta!
+ // look for the minimum distance: the minimum is in iC2WithBestDist
+ if (d<fNStdDev && d<minDist) { minDist=d; iC2WithBestDist = iC2; }
+ }
+ //
+ if (minDist<fNStdDev) { // This means that a cluster in layer 2 was found that matches with iC1
+ //
+ if (fMinDists[iC2WithBestDist] > minDist) {
+ Int_t oldPartner = fPartners[iC2WithBestDist];
+ fPartners[iC2WithBestDist] = iC1;
+ fMinDists[iC2WithBestDist] = minDist;
+ //
+ fAssociatedLay1[iC1] = 1; // mark as assigned
+ //
+ if (oldPartner != -1) {
+ // redo partner search for cluster in L0 (oldPartner), putting this one (iC2WithBestDist) on its fBlackList
+ fBlackList->AddReference(oldPartner,iC2WithBestDist);
+ fAssociatedLay1[oldPartner] = 0; // mark as free
+ }
+ } else {
+ // try again to find a cluster without considering iC2WithBestDist
+ fBlackList->AddReference(iC1,iC2WithBestDist);
+ }
+ //
+ }
+ else fAssociatedLay1[iC1] = 2;// cluster has no partner; remove
+ //
+ return 1;
+}
+
+//____________________________________________________________________
+Int_t AliITSMultReconstructor::StoreTrackletForL2Cluster(Int_t iC2)
+{
+ // build tracklet for cluster iC2 of layer 2
+ if (fPartners[iC2] == -1) return 0;
+ if (fRemoveClustersFromOverlaps) FlagClustersInOverlapRegions (fPartners[iC2],iC2);
+ // Printf("saving tracklets");
+ if (fOverlapFlagClustersLay[0][fPartners[iC2]] || fOverlapFlagClustersLay[1][iC2]) return 0;
+ float* clPar2 = GetClusterLayer2(iC2);
+ float* clPar1 = GetClusterLayer1(fPartners[iC2]);
+ //
+ Float_t* tracklet = fTracklets[fNTracklets] = new Float_t[kTrNPar]; // RS Add also the cluster id's
+ //
+ tracklet[kTrTheta] = clPar1[kClTh]; // use the theta from the clusters in the first layer
+ tracklet[kTrPhi] = clPar1[kClPh]; // use the phi from the clusters in the first layer
+ tracklet[kTrDPhi] = clPar1[kClPh] - clPar2[kClPh]; // store the difference between phi1 and phi2
+ //
+ // define dphi in the range [0,pi] with proper sign (track charge correlated)
+ if (tracklet[kTrDPhi] > TMath::Pi()) tracklet[kTrDPhi] = tracklet[kTrDPhi]-2.*TMath::Pi();
+ if (tracklet[kTrDPhi] < -TMath::Pi()) tracklet[kTrDPhi] = tracklet[kTrDPhi]+2.*TMath::Pi();
+ //
+ tracklet[kTrDTheta] = clPar1[kClTh] - clPar2[kClTh]; // store the theta1-theta2
+ //
+ if (fHistOn) {
+ fhClustersDPhiAcc->Fill(tracklet[kTrDPhi]);
+ fhClustersDThetaAcc->Fill(tracklet[kTrDTheta]);
+ fhDPhiVsDThetaAcc->Fill(tracklet[kTrDTheta],tracklet[kTrDPhi]);
+ }
+ //
+ // find label
+ // if equal label in both clusters found this label is assigned
+ // if no equal label can be found the first labels of the L1 AND L2 cluster are assigned
+ Int_t label1=0,label2=0;
+ while (label2 < 3) {
+ if ( int(clPar1[kClMC0+label1])!=-2 && int(clPar1[kClMC0+label1])==int(clPar2[kClMC0+label2])) break;
+ if (++label1 == 3) { label1 = 0; label2++; }
+ }
+ if (label2 < 3) {
+ AliDebug(AliLog::kDebug, Form("Found label %d == %d for tracklet candidate %d\n",
+ (Int_t) clPar1[kClMC0+label1], (Int_t) clPar1[kClMC0+label2], fNTracklets));
+ tracklet[kTrLab1] = tracklet[kTrLab2] = clPar1[kClMC0+label1];
+ } else {
+ AliDebug(AliLog::kDebug, Form("Did not find label %d %d %d %d %d %d for tracklet candidate %d\n",
+ (Int_t) clPar1[kClMC0], (Int_t) clPar1[kClMC1], (Int_t) clPar1[kClMC2],
+ (Int_t) clPar2[kClMC0], (Int_t) clPar2[kClMC1], (Int_t) clPar2[kClMC2], fNTracklets));
+ tracklet[kTrLab1] = clPar1[kClMC0];
+ tracklet[kTrLab2] = clPar2[kClMC0];
+ }
+ //
+ if (fHistOn) {
+ Float_t eta = tracklet[kTrTheta];
+ eta= TMath::Tan(eta/2.);
+ eta=-TMath::Log(eta);
+ fhetaTracklets->Fill(eta);
+ fhphiTracklets->Fill(tracklet[kTrPhi]);
+ }
+ //
+ tracklet[kClID1] = fPartners[iC2];
+ tracklet[kClID2] = iC2;
+ //
+ // Printf("Adding tracklet candidate");
+ AliDebug(1,Form(" Adding tracklet candidate %d ", fNTracklets));
+ AliDebug(1,Form(" Cl. %d of Layer 1 and %d of Layer 2", fPartners[iC2], iC2));
+ fNTracklets++;
+ fAssociatedLay1[fPartners[iC2]] = 1;
+ //
+ return 1;
+}
+
+//____________________________________________________________________
+void AliITSMultReconstructor::StoreL1Singles()
+{
+ // Printf("saving single clusters...");
+ for (Int_t iC1=0; iC1<fNClustersLay[0]; iC1++) {
+ float* clPar1 = GetClusterLayer1(iC1);
+ if (fAssociatedLay1[iC1]==2||fAssociatedLay1[iC1]==0) {
+ fSClusters[fNSingleCluster] = new Float_t[kClNPar];
+ fSClusters[fNSingleCluster][kSCTh] = clPar1[kClTh];
+ fSClusters[fNSingleCluster][kSCPh] = clPar1[kClPh];
+ fSClusters[fNSingleCluster][kSCLab] = clPar1[kClMC0];
+ fSClusters[fNSingleCluster][kSCID] = iC1;
+ AliDebug(1,Form(" Adding a single cluster %d (cluster %d of layer 1)",
+ fNSingleCluster, iC1));
+ fNSingleCluster++;
+ }
+ }
+ //
+ if (GetStoreSPD2SingleCl()) {
+ for (Int_t iC2=0; iC2<fNClustersLay[1]; iC2++) {
+ if (fPartners[iC2]<0 || (fOverlapFlagClustersLay[0][fPartners[iC2]] || fOverlapFlagClustersLay[1][iC2])) {
+ float* clPar2 = GetClusterLayer2(iC2);
+ fSClusters[fNSingleCluster] = new Float_t[kClNPar];
+ fSClusters[fNSingleCluster][kSCTh] = clPar2[kClTh];
+ fSClusters[fNSingleCluster][kSCPh] = clPar2[kClPh];
+ fSClusters[fNSingleCluster][kSCLab] = clPar2[kClMC0];
+ fSClusters[fNSingleCluster][kSCID] = iC2;
+ AliDebug(1,Form(" Adding a single cluster %d (cluster %d of layer 2)",
+ fNSingleCluster, iC2));
+ fNSingleCluster++;
+ fNSingleClusterSPD2++;
+ }
+ }
+ }
+ //
+}
+
+//____________________________________________________________________
+void AliITSMultReconstructor::ProcessESDTracks()
+{
+ // Flag the clusters used by ESD tracks
+ // Flag primary tracks to be used for multiplicity counting
+ //
+ if (!fESDEvent || !fBuildRefs) return;
+ AliESDVertex* vtx = (AliESDVertex*)fESDEvent->GetPrimaryVertexTracks();
+ if (!vtx || vtx->GetNContributors()<1) vtx = (AliESDVertex*)fESDEvent->GetPrimaryVertexSPD();
+ if (!vtx || vtx->GetNContributors()<1) {
+ AliDebug(1,"No primary vertex: cannot flag primary tracks");
+ return;
+ }
+ Int_t ntracks = fESDEvent->GetNumberOfTracks();
+ for(Int_t itr=0; itr<ntracks; itr++) {
+ AliESDtrack* track = fESDEvent->GetTrack(itr);
+ if (!track->IsOn(AliESDtrack::kITSin)) continue; // use only tracks propagated in ITS to vtx
+ FlagTrackClusters(itr);
+ FlagIfSecondary(track,vtx);
+ }
+ FlagV0s(vtx);
+ //
+}
+
+//____________________________________________________________________
+void AliITSMultReconstructor::FlagTrackClusters(Int_t id)
+{
+ // RS: flag the SPD clusters of the track if it is useful for the multiplicity estimation
+ //
+ const AliESDtrack* track = fESDEvent->GetTrack(id);
+ Int_t idx[12];
+ if ( track->GetITSclusters(idx)<3 ) return; // at least 3 clusters must be used in the fit
+ Int_t itsType = track->IsOn(AliESDtrack::kITSpureSA) ? 1:0;
+
+ for (int i=6/*AliESDfriendTrack::kMaxITScluster*/;i--;) { // ignore extras: note: i>=6 is for extra clusters
+ if (idx[i]<0) continue;
+ int layID= (idx[i] & 0xf0000000) >> 28;
+ if (layID>1) continue; // SPD only
+ int clID = (idx[i] & 0x0fffffff);
+ fUsedClusLay[layID][itsType]->AddReference(clID,id);
+ fStoreRefs[layID][itsType] = kTRUE;
+ }
+ //
+}
+
+//____________________________________________________________________
+void AliITSMultReconstructor::FlagIfSecondary(AliESDtrack* track, const AliVertex* vtx)
+{
+ // RS: check if the track is primary and set the flag
+ double cut = (track->HasPointOnITSLayer(0)||track->HasPointOnITSLayer(1)) ? fCutPxDrSPDin:fCutPxDrSPDout;
+ float xz[2];
+ track->GetDZ(vtx->GetX(),vtx->GetY(),vtx->GetZ(), fESDEvent->GetMagneticField(), xz);
+ if (TMath::Abs(xz[0]*track->P())>cut || TMath::Abs(xz[1]*track->P())>fCutPxDz ||
+ TMath::Abs(xz[0])>fCutDCArz || TMath::Abs(xz[1])>fCutDCArz)
+ track->SetStatus(AliESDtrack::kMultSec);
+ else track->ResetStatus(AliESDtrack::kMultSec);
+}
+
+//____________________________________________________________________
+void AliITSMultReconstructor::FlagV0s(const AliESDVertex *vtx)
+{
+ // flag tracks belonging to v0s
+ //
+ const double kK0Mass = 0.4976;
+ //
+ AliV0 pvertex;
+ AliKFVertex vertexKF;
+ AliKFParticle epKF0,epKF1,pipmKF0,piKF0,piKF1,gammaKF,k0KF;
+ Double_t mass,massErr,chi2c;
+ enum {kKFIni=BIT(14)};
+ //
+ double recVtx[3];
+ float recVtxF[3];
+ vtx->GetXYZ(recVtx);
+ for (int i=3;i--;) recVtxF[i] = recVtx[i];
+ //
+ int ntracks = fESDEvent->GetNumberOfTracks();
+ if (ntracks<2) return;
+ //
+ vertexKF.X() = recVtx[0];
+ vertexKF.Y() = recVtx[1];
+ vertexKF.Z() = recVtx[2];
+ vertexKF.Covariance(0,0) = vtx->GetXRes()*vtx->GetXRes();
+ vertexKF.Covariance(1,2) = vtx->GetYRes()*vtx->GetYRes();
+ vertexKF.Covariance(2,2) = vtx->GetZRes()*vtx->GetZRes();
+ //
+ AliESDtrack *trc0,*trc1;
+ for (int it0=0;it0<ntracks;it0++) {
+ trc0 = fESDEvent->GetTrack(it0);
+ if (trc0->IsOn(AliESDtrack::kMultInV0)) continue;
+ if (!trc0->IsOn(AliESDtrack::kITSin)) continue;
+ Bool_t isSAP = trc0->IsPureITSStandalone();
+ Int_t q0 = trc0->Charge();
+ Bool_t testGamma = CanBeElectron(trc0);
+ epKF0.ResetBit(kKFIni);
+ piKF0.ResetBit(kKFIni);
+ double bestChi2=1e16;
+ int bestID = -1;
+ //
+ for (int it1=it0+1;it1<ntracks;it1++) {
+ trc1 = fESDEvent->GetTrack(it1);
+ if (trc1->IsOn(AliESDtrack::kMultInV0)) continue;
+ if (!trc1->IsOn(AliESDtrack::kITSin)) continue;
+ if (trc1->IsPureITSStandalone() != isSAP) continue; // pair separately ITS_SA_Pure tracks and TPC/ITS+ITS_SA
+ if ( (q0+trc1->Charge())!=0 ) continue; // don't pair like signs
+ //
+ pvertex.SetParamN(q0<0 ? *trc0:*trc1);
+ pvertex.SetParamP(q0>0 ? *trc0:*trc1);
+ pvertex.Update(recVtxF);
+ if (pvertex.P()<fCutMinP) continue;
+ if (pvertex.GetV0CosineOfPointingAngle()<fCutMinPointAngle) continue;
+ if (pvertex.GetDcaV0Daughters()>fCutMaxDCADauther) continue;
+ double d = pvertex.GetD(recVtx[0],recVtx[1],recVtx[2]);
+ if (d>fCutMaxDCA) continue;
+ double dx=recVtx[0]-pvertex.Xv(), dy=recVtx[1]-pvertex.Yv();
+ double rv = TMath::Sqrt(dx*dx+dy*dy);
+ //
+ // check gamma conversion hypothesis ----------------------------------------------------------->>>
+ Bool_t gammaOK = kFALSE;
+ while (testGamma && CanBeElectron(trc1)) {
+ if (rv<fCutMinRGamma) break;
+ if (!epKF0.TestBit(kKFIni)) {
+ new(&epKF0) AliKFParticle(*trc0,q0>0 ? kPositron:kElectron);
+ epKF0.SetBit(kKFIni);
+ }
+ new(&epKF1) AliKFParticle(*trc1,q0<0 ? kPositron:kElectron);
+ gammaKF.Initialize();
+ gammaKF += epKF0;
+ gammaKF += epKF1;
+ gammaKF.SetProductionVertex(vertexKF);
+ gammaKF.GetMass(mass,massErr);
+ if (mass>fCutMassGamma || (massErr>0&&(mass>massErr*fCutMassGammaNSigma))) break;
+ if (gammaKF.GetS()<fCutGammaSFromDecay) break;
+ gammaKF.SetMassConstraint(0.,0.001);
+ chi2c = (gammaKF.GetNDF()!=0) ? gammaKF.GetChi2()/gammaKF.GetNDF() : 1000;
+ if (chi2c>fCutChi2cGamma) break;
+ gammaOK = kTRUE;
+ if (chi2c>bestChi2) break;
+ bestChi2 = chi2c;
+ bestID = it1;
+ break;
+ }
+ if (gammaOK) continue;
+ // check gamma conversion hypothesis -----------------------------------------------------------<<<
+ // check K0 conversion hypothesis ----------------------------------------------------------->>>
+ while (1) {
+ if (rv<fCutMinRK0) break;
+ if (!piKF0.TestBit(kKFIni)) {
+ new(&piKF0) AliKFParticle(*trc0,q0>0 ? kPiPlus:kPiMinus);
+ piKF0.SetBit(kKFIni);
+ }
+ new(&piKF1) AliKFParticle(*trc1,q0<0 ? kPiPlus:kPiMinus);
+ k0KF.Initialize();
+ k0KF += piKF0;
+ k0KF += piKF1;
+ k0KF.SetProductionVertex(vertexKF);
+ k0KF.GetMass(mass,massErr);
+ mass -= kK0Mass;
+ if (TMath::Abs(mass)>fCutMassK0 || (massErr>0&&(abs(mass)>massErr*fCutMassK0NSigma))) break;
+ if (k0KF.GetS()<fCutK0SFromDecay) break;
+ k0KF.SetMassConstraint(kK0Mass,0.001);
+ chi2c = (k0KF.GetNDF()!=0) ? k0KF.GetChi2()/k0KF.GetNDF() : 1000;
+ if (chi2c>fCutChi2cK0) break;
+ if (chi2c>bestChi2) break;
+ bestChi2 = chi2c;
+ bestID = it1;
+ break;
+ }
+ // check K0 conversion hypothesis -----------------------------------------------------------<<<
+ }
+ //
+ if (bestID>=0) {
+ trc0->SetStatus(AliESDtrack::kMultInV0);
+ fESDEvent->GetTrack(bestID)->SetStatus(AliESDtrack::kMultInV0);
+ }
+ }
+ //
+}
+
+//____________________________________________________________________
+Bool_t AliITSMultReconstructor::CanBeElectron(const AliESDtrack* trc) const
+{
+ // check if the track can be electron
+ Double_t pid[AliPID::kSPECIES];
+ if (!trc->IsOn(AliESDtrack::kESDpid)) return kTRUE;
+ trc->GetESDpid(pid);
+ return (trc->IsOn(AliESDtrack::kTPCpid)) ?
+ pid[AliPID::kElectron]>fCutMinElectronProbTPC :
+ pid[AliPID::kElectron]>fCutMinElectronProbESD;
+ //
+}
+
+//____________________________________________________________________
+AliITSRecPoint* AliITSMultReconstructor::GetRecPoint(Int_t lr, Int_t n) const
+{
+ // return a cluster of lr corresponding to orderer cluster index n
+ if (fClArr[lr] && fClusterCopyIndex[lr] && n<fNClustersLay[lr])
+ return (AliITSRecPoint*) fClArr[lr]->At(fClusterCopyIndex[lr][n]);
+ else {
+ AliError("To access the clusters SetCreateClustersCopy should have been called");
+ return 0;
+ }
}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff