* 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 "AliITSMultReconstructor.h"
#include "AliITSReconstructor.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"
//____________________________________________________________________
ClassImp(AliITSMultReconstructor)
//____________________________________________________________________
AliITSMultReconstructor::AliITSMultReconstructor():
-TObject(),
+fDetTypeRec(0),fESDEvent(0),fTreeRP(0),fUsedClusLay1(0),fUsedClusLay2(0),
fClustersLay1(0),
fClustersLay2(0),
fDetectorIndexClustersLay1(0),
fRemoveClustersFromOverlaps(0),
fPhiOverlapCut(0),
fZetaOverlapCut(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),
fNFiredChips[0] = 0;
fNFiredChips[1] = 0;
-
// Method to reconstruct the charged particles multiplicity with the
// SPD (tracklets).
-
SetHistOn();
if(AliITSReconstructor::GetRecoParam()) {
SetRemoveClustersFromOverlaps(AliITSReconstructor::GetRecoParam()->GetTrackleterRemoveClustersFromOverlaps());
SetPhiOverlapCut(AliITSReconstructor::GetRecoParam()->GetTrackleterPhiOverlapCut());
SetZetaOverlapCut(AliITSReconstructor::GetRecoParam()->GetTrackleterZetaOverlapCut());
+ //
+ 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();
+ //
+ 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;
}
//______________________________________________________________________
-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),fUsedClusLay1(0),fUsedClusLay2(0),
+fClustersLay1(0),
+fClustersLay2(0),
+fDetectorIndexClustersLay1(0),
+fDetectorIndexClustersLay2(0),
+fOverlapFlagClustersLay1(0),
+fOverlapFlagClustersLay2(0),
+fTracklets(0),
+fSClusters(0),
+fNClustersLay1(0),
+fNClustersLay2(0),
+fNTracklets(0),
+fNSingleCluster(0),
+fPhiWindow(0),
+fThetaWindow(0),
+fPhiShift(0),
+fRemoveClustersFromOverlaps(0),
+fPhiOverlapCut(0),
+fZetaOverlapCut(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)
+ {
+ // 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];
-
+ delete[] fUsedClusLay1;
+ delete[] fUsedClusLay2;
+ // delete arrays
for(Int_t i=0; i<fNTracklets; i++)
delete [] fTracklets[i];
delete [] fSClusters;
}
+//____________________________________________________________________
+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;
+ fNClustersLay1 = 0;
+ fNClustersLay2 = 0;
+ fNTracklets = 0;
+ fNSingleCluster = 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
+
+ if (fMult) delete fMult; fMult = 0;
+ fNClustersLay1 = 0;
+ fNClustersLay2 = 0;
+ fNTracklets = 0;
+ fNSingleCluster = 0;
+ //
+ if (!clusterTree) { AliError(" Invalid ITS cluster tree !\n"); return; }
+ //
+ fESDEvent = 0;
+ fTreeRP = clusterTree;
+ //
+ 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).
// 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);
+ // Find tracklets converging to vertex
+ //
+ LoadClusterArrays(fTreeRP);
+ // flag clusters used by ESD tracks
+ if (fESDEvent) ProcessESDTracks();
+
+ if (!vtx) return;
const Double_t pi = TMath::Pi();
// get average magnetic field
Float_t bz = 0;
AliMagF* field = 0;
- if (TGeoGlobalMagField::Instance())
- field = dynamic_cast<AliMagF*>(TGeoGlobalMagField::Instance()->GetField());
+ 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.")
//###########################################################
// 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 *clPar = GetClusterLayer1(iC1);
+ Float_t x = clPar[kClTh] - vtx[0];
+ Float_t y = clPar[kClPh] - vtx[1];
+ Float_t z = clPar[kClZ] - 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
+ clPar[kClTh] = TMath::ACos(z/r); // Store Theta
+ clPar[kClPh] = TMath::Pi() + TMath::ATan2(-y,-x); // Store Phi
if (fHistOn) {
- Float_t eta=fClustersLay1[iC1][0];
+ Float_t eta = clPar[kClTh];
eta= TMath::Tan(eta/2.);
eta=-TMath::Log(eta);
fhetaClustersLay1->Fill(eta);
- fhphiClustersLay1->Fill(fClustersLay1[iC1][1]);
+ fhphiClustersLay1->Fill(clPar[kClPh]);
}
}
// 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 *clPar = GetClusterLayer2(iC2);
+ Float_t x = clPar[kClTh] - vtx[0];
+ Float_t y = clPar[kClPh] - vtx[1];
+ Float_t z = clPar[kClZ] - 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
+
+ clPar[kClTh] = TMath::ACos(z/r); // Store Theta
+ clPar[kClPh] = TMath::Pi() + TMath::ATan2(-y,-x); // Store Phi
}
//###########################################################
// 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;
+ // already used ?
+ if (associatedLay1[iC1] != 0) continue;
found++;
// reset of variables for multiple candidates
Int_t iC2WithBestDist = -1; // reset
Double_t minDist = 2; // reset
-
+ float* clPar1 = GetClusterLayer1(iC1);
+
// Loop on layer 2
for (Int_t iC2=0; iC2<fNClustersLay2; iC2++) {
- // in the overlap ?
- if (fOverlapFlagClustersLay2[iC2]) continue;
+ float* clPar2 = GetClusterLayer2(iC2);
if (blacklist[iC1]) {
Bool_t blacklisted = kFALSE;
- for (Int_t i=0; i<blacklist[iC1]->GetSize(); i++) {
+ for (Int_t i=blacklist[iC1]->GetSize(); i--;) {
if (blacklist[iC1]->At(i) == iC2) {
blacklisted = kTRUE;
break;
}
// 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]);
+ Double_t dTheta = TMath::Abs(clPar2[kClTh] - clPar1[kClTh]);
+ Double_t dPhi = TMath::Abs(clPar2[kClPh] - clPar1[kClPh]);
// take into account boundary condition
if (dPhi>pi) dPhi=2.*pi-dPhi;
if (partners[iC2] == -1) continue;
- if (fOverlapFlagClustersLay1[partners[iC2]] || fOverlapFlagClustersLay2[iC2]) continue;
if (fRemoveClustersFromOverlaps) FlagClustersInOverlapRegions (partners[iC2],iC2);
- fTracklets[fNTracklets] = new Float_t[6];
+
+ if (fOverlapFlagClustersLay1[partners[iC2]] || fOverlapFlagClustersLay2[iC2]) continue;
+
+ float* clPar2 = GetClusterLayer2(iC2);
+ float* clPar1 = GetClusterLayer1(partners[iC2]);
+
+ Float_t* tracklet = fTracklets[fNTracklets] = new Float_t[kTrNPar]; // RS Add also the cluster id's
// use the theta from the clusters in the first layer
- fTracklets[fNTracklets][0] = fClustersLay1[partners[iC2]][0];
+ tracklet[kTrTheta] = clPar1[kClTh];
// use the phi from the clusters in the first layer
- fTracklets[fNTracklets][1] = fClustersLay1[partners[iC2]][1];
+ tracklet[kTrPhi] = clPar1[kClPh];
// store the difference between phi1 and phi2
- fTracklets[fNTracklets][2] = fClustersLay1[partners[iC2]][1] - fClustersLay2[iC2][1];
+ tracklet[kTrDPhi] = clPar1[kClPh] - clPar2[kClPh];
// 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();
+ if (tracklet[kTrDPhi] > TMath::Pi()) tracklet[kTrDPhi] = tracklet[kTrDPhi]-2.*TMath::Pi();
+ if (tracklet[kTrDPhi] < -TMath::Pi()) tracklet[kTrDPhi] = tracklet[kTrDPhi]+2.*TMath::Pi();
// store the difference between theta1 and theta2
- fTracklets[fNTracklets][3] = fClustersLay1[partners[iC2]][0] - fClustersLay2[iC2][0];
+ tracklet[kTrDTheta] = clPar1[kClTh] - clPar2[kClTh];
if (fHistOn) {
- fhClustersDPhiAcc->Fill(fTracklets[fNTracklets][2]);
- fhClustersDThetaAcc->Fill(fTracklets[fNTracklets][3]);
- fhDPhiVsDThetaAcc->Fill(fTracklets[fNTracklets][3],fTracklets[fNTracklets][2]);
+ fhClustersDPhiAcc->Fill(tracklet[kTrDPhi]);
+ fhClustersDThetaAcc->Fill(tracklet[kTrDTheta]);
+ fhDPhiVsDThetaAcc->Fill(tracklet[kTrDTheta],tracklet[kTrDPhi]);
}
// find label
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])
+ if ((Int_t) clPar1[kClMC0+label1] != -2 && (Int_t) clPar1[kClMC0+label1] == (Int_t) clPar2[kClMC0+label2])
break;
label1++;
if (label1 == 3) {
}
}
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];
+ 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] = clPar1[kClMC0+label1];
+ tracklet[kTrLab2] = clPar2[kClMC0+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];
+ 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=fTracklets[fNTracklets][0];
+ Float_t eta = tracklet[kTrTheta];
eta= TMath::Tan(eta/2.);
eta=-TMath::Log(eta);
fhetaTracklets->Fill(eta);
- fhphiTracklets->Fill(fTracklets[fNTracklets][1]);
+ fhphiTracklets->Fill(tracklet[kTrPhi]);
}
-
+ //
+ tracklet[kClID1] = partners[iC2];
+ tracklet[kClID2] = iC2;
+ //
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++;
// Delete the following else if you do not want to save Clusters!
// store the cluster
for (Int_t iC1=0; iC1<fNClustersLay1; iC1++) {
+
+ float* clPar1 = GetClusterLayer1(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];
+ 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++;
}
//____________________________________________________________________
-void
-AliITSMultReconstructor::LoadClusterArrays(TTree* itsClusterTree) {
+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->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));
+ //
+ for (int i=fNTracklets;i--;) {
+ float* tlInfo = fTracklets[i];
+ fMult->SetTrackletData(i,tlInfo, fUsedClusLay1[int(tlInfo[kClID1])],fUsedClusLay2[int(tlInfo[kClID2])]);
+ }
+ //
+ for (int i=fNSingleCluster;i--;) {
+ float* clInfo = fSClusters[i];
+ fMult->SetSingleClusterData(i,clInfo,fUsedClusLay1[int(clInfo[kSCID])]);
+ }
+ fMult->CompactBits();
+ //
+}
+
+
+//____________________________________________________________________
+void AliITSMultReconstructor::LoadClusterArrays(TTree* itsClusterTree)
+{
// This method
// - gets the clusters from the cluster tree
// - convert them into global coordinates
// - store them in the internal arrays
// - count the number of cluster-fired chips
+ //
+ // 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,"Loading clusters and cluster-fired chips ...");
AliWarning("No SPD rec points found, multiplicity not calculated");
return;
}
- Float_t cluGlo[3]={0.,0.,0.};
-
-
+ //
// count clusters
// loop over the SPD subdetectors
- Int_t nSPDL1 = AliITSgeomTGeo::GetModuleIndex(2,1,1);
- for (Int_t iIts=0; iIts < nSPDL1; iIts++) {
- itsClusters=rpcont->UncheckedGetClusters(iIts);
- fNClustersLay1 += itsClusters->GetEntriesFast();
- }
- Int_t nSPDL2=AliITSgeomTGeo::GetModuleIndex(3,1,1);
- for (Int_t iIts=nSPDL1; iIts < nSPDL2; iIts++) {
- itsClusters=rpcont->UncheckedGetClusters(iIts);
- fNClustersLay2 += itsClusters->GetEntriesFast();
- }
-
- // 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 < nSPDL2; 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;
-
- // 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++;
+ TObjArray clArr(100);
+ for (int il=0;il<2;il++) {
+ int nclLayer = 0;
+ int detMin = AliITSgeomTGeo::GetModuleIndex(il+1,1,1);
+ int detMax = AliITSgeomTGeo::GetModuleIndex(il+2,1,1);
+ for (int idt=detMin;idt<detMax;idt++) {
+ itsClusters=rpcont->UncheckedGetClusters(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);
+ if (!cluster) continue;
+ clArr.AddAtAndExpand(cluster,nclLayer++);
+ nClustersInChip[ seg.GetChipFromLocal(0,cluster->GetDetLocalZ()) ]++;
}
- 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
-
- for(Int_t ifChip=0; ifChip<5; ifChip++) {
- if(nClustersInChip[ifChip] >= 1) fNFiredChips[layer]++;
+ for(Int_t ifChip=5;ifChip--;) if (nClustersInChip[ifChip]) fNFiredChips[il]++;
}
-
- } // end of its "subdetector" loop
-
+ // 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];
+ UInt_t* usedClusLay = new UInt_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;
+ usedClusLay[ic] = 0;
+ for (Int_t i=3;i--;) clPar[kClMC0+i] = cluster->GetLabel(i);
+ }
+ clArr.Clear();
+ delete[] z;
+ delete[] index;
+ //
+ if (il==0) {
+ fClustersLay1 = clustersLay;
+ fOverlapFlagClustersLay1 = overlapFlagClustersLay;
+ fDetectorIndexClustersLay1 = detectorIndexClustersLay;
+ fUsedClusLay1 = usedClusLay;
+ fNClustersLay1 = nclLayer;
+ }
+ else {
+ fClustersLay2 = clustersLay;
+ fOverlapFlagClustersLay2 = overlapFlagClustersLay;
+ fDetectorIndexClustersLay2 = detectorIndexClustersLay;
+ fUsedClusLay2 = usedClusLay;
+ fNClustersLay2 = nclLayer;
+ }
+ }
+ //
+ // no double association allowed
+ int nmaxT = TMath::Min(fNClustersLay1, fNClustersLay2);
+ fTracklets = new Float_t*[nmaxT];
+ fSClusters = new Float_t*[fNClustersLay1];
+ for (Int_t i=nmaxT;i--;) fTracklets[i] = 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]));
}
//____________________________________________________________________
void
AliITSMultReconstructor::LoadClusterFiredChips(TTree* itsClusterTree) {
- // This method
+ // This method
// - gets the clusters from the cluster tree
// - counts the number of (cluster)fired chips
fNFiredChips[0] = 0;
fNFiredChips[1] = 0;
- AliITSsegmentationSPD seg;
+ AliITSsegmentationSPD seg;
AliITSRecPointContainer* rpcont=AliITSRecPointContainer::Instance();
TClonesArray* itsClusters=rpcont->FetchClusters(0,itsClusterTree);
if(!rpcont->IsSPDActive()){
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]) {
// 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]);
+ 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);
for (Int_t iiC2=0; iiC2<fNClustersLay2; iiC2++) {
if (!fOverlapFlagClustersLay2[iiC2]) {
// only for adjacent modules
+ Float_t *clPar2 = GetClusterLayer2(iiC2);
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 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 (distClSameModMin!=0.) fOverlapFlagClustersLay2[iClOverlap]=kTRUE;
}
+
+//____________________________________________________________________
+void AliITSMultReconstructor::ProcessESDTracks()
+{
+ // Flag the clusters used by ESD tracks
+ // Flag primary tracks to be used for multiplicity counting
+ //
+ if (!fESDEvent) 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 UShort_t kMaxTrID = 0xffff - 1; // max possible track id
+ if (id>kMaxTrID) return;
+ 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
+ UInt_t *uClus[2] = {fUsedClusLay1,fUsedClusLay2};
+ //
+ UInt_t mark = id+1;
+ if (track->IsOn(AliESDtrack::kITSpureSA)) mark <<= 16;
+ //
+ for (int i=AliESDfriendTrack::kMaxITScluster;i--;) {
+ // 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);
+ uClus[layID][clID] |= mark;
+ }
+ //
+}
+
+//____________________________________________________________________
+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;
+ //
+}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff