/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
* See cxx source for full Copyright notice */
-/* $Id$ */
-
-/////////////////////////////////////////////////////////////////////////
-//
-// AliITSMultReconstructor - find clusters in the pixels (theta and
-// phi) and tracklets.
+//_________________________________________________________________________
//
-// These can be used to extract charged particles multiplcicity from the ITS.
+// Implementation of the ITS-SPD trackleter class
//
-// A tracklet consist of two ITS clusters, one in the first pixel
-// layer and one in the second. The clusters are associates if the
-// differencies in Phi (azimuth) and Zeta (longitudinal) are inside
-// a fiducial volume. In case of multiple candidates it is selected the
-// candidate with minimum distance in Phi.
-// The boolean fOnlyOneTrackletPerC2 allows to control if two clusters
-// in layer 2 can be associated to the same cluster in layer 1 or not.
+// It retrieves clusters in the pixels (theta and phi) and finds tracklets.
+// These can be used to extract charged particle multiplicity from the ITS.
//
-/////////////////////////////////////////////////////////////////////////
-
-#include "TObject.h"
-
+// A tracklet consists of two ITS clusters, one in the first pixel layer and
+// one in the second. The clusters are associated if the differences in
+// Phi (azimuth) and Theta (polar angle) are within fiducial windows.
+// In case of multiple candidates the candidate with minimum
+// distance is selected.
+//_________________________________________________________________________
+#include "AliTrackleter.h"
+
+class TBits;
class TTree;
class TH1F;
-class TH2F;
+class TH2F;
+class AliITSDetTypeRec;
class AliITSgeom;
+class AliESDEvent;
+class AliESDtrack;
+class AliVertex;
+class AliESDVertex;
+class AliMultiplicity;
-class AliITSMultReconstructor : public TObject
+class AliITSMultReconstructor : public AliTrackleter
{
public:
+ //
+ enum {kClTh,kClPh,kClZ,kClMC0,kClMC1,kClMC2,kClNPar};
+ enum {kTrTheta,kTrPhi,kTrDPhi,kTrDTheta,kTrLab1,kTrLab2,kClID1,kClID2,kTrNPar};
+ enum {kSCTh,kSCPh,kSCLab,kSCID,kSCNPar};
+ enum {kITSTPC,kITSSAP,kITSTPCBit=BIT(kITSTPC),kITSSAPBit=BIT(kITSSAP)}; // RS
AliITSMultReconstructor();
virtual ~AliITSMultReconstructor();
- void SetGeometry(AliITSgeom* geo) {fGeometry = geo;}
-
- void Reconstruct(TTree* tree, Float_t* vtx, Float_t* vtxRes);
-
- void SetPhiWindow(Float_t w=0.08) {fPhiWindow=w;}
- void SetZetaWindow(Float_t w=0.5) {fZetaWindow=w;}
- void SetOnlyOneTrackletPerC2(Float_t b = kFALSE) {fOnlyOneTrackletPerC2 = b;}
+ void Reconstruct(AliESDEvent* esd, TTree* treeRP);
+ void Reconstruct(TTree* tree, Float_t* vtx, Float_t* vtxRes); // old reconstructor invocation
+ void FindTracklets(const Float_t* vtx);
+ void LoadClusterFiredChips(TTree* tree);
+ void FlagClustersInOverlapRegions(Int_t ic1,Int_t ic2);
+ void FlagTrackClusters(Int_t id);
+ void FlagIfSecondary(AliESDtrack* track, const AliVertex* vtx);
+ void FlagV0s(const AliESDVertex *vtx);
+ void ProcessESDTracks();
+ Bool_t CanBeElectron(const AliESDtrack* trc) const;
+ void CreateMultiplicityObject();
+ //
+ // Following members are set via AliITSRecoParam
+ void SetPhiWindow(Float_t w=0.08) {fPhiWindow=w;}
+ void SetThetaWindow(Float_t w=0.025) {fThetaWindow=w;}
+ void SetPhiShift(Float_t w=0.0045) {fPhiShift=w;}
+ void SetRemoveClustersFromOverlaps(Bool_t b = kFALSE) {fRemoveClustersFromOverlaps = b;}
+ void SetPhiOverlapCut(Float_t w=0.005) {fPhiOverlapCut=w;}
+ void SetZetaOverlapCut(Float_t w=0.05) {fZetaOverlapCut=w;}
+
Int_t GetNClustersLayer1() const {return fNClustersLay1;}
Int_t GetNClustersLayer2() const {return fNClustersLay2;}
Int_t GetNTracklets() const {return fNTracklets;}
+ Int_t GetNSingleClusters() const {return fNSingleCluster;}
+ Short_t GetNFiredChips(Int_t layer) const {return fNFiredChips[layer];}
+
+ Float_t* GetClusterLayer1(Int_t n) {return &fClustersLay1[n*kClNPar];}
+ Float_t* GetClusterLayer2(Int_t n) {return &fClustersLay2[n*kClNPar];}
- Float_t* GetClusterLayer1(Int_t n) {return fClustersLay1[n];}
- Float_t* GetClusterLayer2(Int_t n) {return fClustersLay2[n];}
Float_t* GetTracklet(Int_t n) {return fTracklets[n];}
+ Float_t* GetCluster(Int_t n) {return fSClusters[n];}
void SetHistOn(Bool_t b=kFALSE) {fHistOn=b;}
void SaveHists();
-protected:
-
- AliITSgeom* fGeometry; // ITS geometry
-
- Float_t** fClustersLay1; // clusters in the 1st layer of ITS
- Float_t** fClustersLay2; // clusters in the 2nd layer of ITS
- Float_t** fTracklets; // tracklets
- Bool_t* fAssociationFlag; // flag for the associations
-
- Int_t fNClustersLay1; // Number of clusters (Layer1)
- Int_t fNClustersLay2; // Number of clusters (Layer2)
- Int_t fNTracklets; // Number of tracklets
-
- Float_t fPhiWindow; // Search window in phi
- Float_t fZetaWindow; // SEarch window in eta
- Bool_t fOnlyOneTrackletPerC2; // only one tracklet per cluster in layer 2
+ AliITSDetTypeRec *GetDetTypeRec() const {return fDetTypeRec;}
+ void SetDetTypeRec(AliITSDetTypeRec *ptr){fDetTypeRec = ptr;}
+ //
+ void SetCutPxDrSPDin(Float_t v=0.1) { fCutPxDrSPDin = v;}
+ void SetCutPxDrSPDout(Float_t v=0.15) { fCutPxDrSPDout = v;}
+ void SetCutPxDz(Float_t v=0.2) { fCutPxDz = v;}
+ void SetCutDCArz(Float_t v=0.5) { fCutDCArz = v;}
+ void SetCutMinElectronProbTPC(Float_t v=0.5) { fCutMinElectronProbTPC = v;}
+ void SetCutMinElectronProbESD(Float_t v=0.1) { fCutMinElectronProbESD = v;}
+ void SetCutMinP(Float_t v=0.05) { fCutMinP = v;}
+ void SetCutMinRGamma(Float_t v=2.) { fCutMinRGamma = v;}
+ void SetCutMinRK0(Float_t v=1.) { fCutMinRK0 = v;}
+ void SetCutMinPointAngle(Float_t v=0.98) { fCutMinPointAngle = v;}
+ void SetCutMaxDCADauther(Float_t v=0.5) { fCutMaxDCADauther = v;}
+ void SetCutMassGamma(Float_t v=0.03) { fCutMassGamma = v;}
+ void SetCutMassGammaNSigma(Float_t v=5.) { fCutMassGammaNSigma = v;}
+ void SetCutMassK0(Float_t v=0.03) { fCutMassK0 = v;}
+ void SetCutMassK0NSigma(Float_t v=5.) { fCutMassK0NSigma = v;}
+ void SetCutChi2cGamma(Float_t v=2.) { fCutChi2cGamma = v;}
+ void SetCutChi2cK0(Float_t v=2.) { fCutChi2cK0 = v;}
+ void SetCutGammaSFromDecay(Float_t v=-10.) { fCutGammaSFromDecay = v;}
+ void SetCutK0SFromDecay(Float_t v=-10.) { fCutK0SFromDecay = v;}
+ void SetCutMaxDCA(Float_t v=1.) { fCutMaxDCA = v;}
+ //
+ Float_t GetCutPxDrSPDin() const {return fCutPxDrSPDin;}
+ Float_t GetCutPxDrSPDout() const {return fCutPxDrSPDout;}
+ Float_t GetCutPxDz() const {return fCutPxDz;}
+ Float_t GetCutDCArz() const {return fCutDCArz;}
+ Float_t GetCutMinElectronProbTPC() const {return fCutMinElectronProbTPC;}
+ Float_t GetCutMinElectronProbESD() const {return fCutMinElectronProbESD;}
+ Float_t GetCutMinP() const {return fCutMinP;}
+ Float_t GetCutMinRGamma() const {return fCutMinRGamma;}
+ Float_t GetCutMinRK0() const {return fCutMinRK0;}
+ Float_t GetCutMinPointAngle() const {return fCutMinPointAngle;}
+ Float_t GetCutMaxDCADauther() const {return fCutMaxDCADauther;}
+ Float_t GetCutMassGamma() const {return fCutMassGamma;}
+ Float_t GetCutMassGammaNSigma() const {return fCutMassGammaNSigma;}
+ Float_t GetCutMassK0() const {return fCutMassK0;}
+ Float_t GetCutMassK0NSigma() const {return fCutMassK0NSigma;}
+ Float_t GetCutChi2cGamma() const {return fCutChi2cGamma;}
+ Float_t GetCutChi2cK0() const {return fCutChi2cK0;}
+ Float_t GetCutGammaSFromDecay() const {return fCutGammaSFromDecay;}
+ Float_t GetCutK0SFromDecay() const {return fCutK0SFromDecay;}
+ Float_t GetCutMaxDCA() const {return fCutMaxDCA;}
+ //
+protected:
+ AliITSMultReconstructor(const AliITSMultReconstructor& mr);
+ AliITSMultReconstructor& operator=(const AliITSMultReconstructor& mr);
+ AliITSDetTypeRec* fDetTypeRec; //! pointer to DetTypeRec
+ AliESDEvent* fESDEvent; //! pointer to ESD event
+ TTree* fTreeRP; //! ITS recpoints
+
+ UInt_t* fUsedClusLay1; // RS: flag of clusters usage in ESD tracks: 0=unused, else ID+1 in word0=TPC/ITS+ITSSA, word1=ITSSA_Pure
+ UInt_t* fUsedClusLay2; // RS: flag of clusters usage in ESD tracks: 0=unused, else ID+1 word0=TPC/ITS+ITSSA, word1=ITSSA_Pure
+
+ Float_t* fClustersLay1; // clusters in the 1st layer of ITS
+ Float_t* fClustersLay2; // clusters in the 2nd layer of ITS
+ Int_t* fDetectorIndexClustersLay1; // module index for clusters 1st ITS layer
+ Int_t* fDetectorIndexClustersLay2; // module index for clusters 2nd ITS layer
+ Bool_t* fOverlapFlagClustersLay1; // flag for clusters in the overlap regions 1st ITS layer
+ Bool_t* fOverlapFlagClustersLay2; // flag for clusters in the overlap regions 2nd ITS layer
+
+ Float_t** fTracklets; // tracklets
+ Float_t** fSClusters; // single clusters (unassociated)
- Bool_t fHistOn;
-
- TH1F* fhClustersDPhiAcc;
- TH1F* fhClustersDThetaAcc;
- TH1F* fhClustersDZetaAcc;
- TH1F* fhClustersDPhiAll;
- TH1F* fhClustersDThetaAll;
- TH1F* fhClustersDZetaAll;
+ Int_t fNClustersLay1; // Number of clusters (Layer1)
+ Int_t fNClustersLay2; // Number of clusters (Layer2)
+ Int_t fNTracklets; // Number of tracklets
+ Int_t fNSingleCluster; // Number of unassociated clusters
+ Short_t fNFiredChips[2]; // Number of fired chips in the two SPD layers
+ //
+ // Following members are set via AliITSRecoParam
+ //
+ Float_t fPhiWindow; // Search window in phi
+ Float_t fThetaWindow; // Search window in theta
+ Float_t fPhiShift; // Phi shift reference value (at 0.5 T)
+ Bool_t fRemoveClustersFromOverlaps; // Option to skip clusters in the overlaps
+ Float_t fPhiOverlapCut; // Fiducial window in phi for overlap cut
+ Float_t fZetaOverlapCut; // Fiducial window in eta for overlap cut
+
+ // cuts for secondaries identification
+ Float_t fCutPxDrSPDin; // max P*DR for primaries involving at least 1 SPD
+ Float_t fCutPxDrSPDout; // max P*DR for primaries not involving any SPD
+ Float_t fCutPxDz; // max P*DZ for primaries
+ Float_t fCutDCArz; // max DR or DZ for primares
+ //
+ // cuts for flagging tracks in V0s
+ Float_t fCutMinElectronProbTPC; // min probability for e+/e- PID involving TPC
+ Float_t fCutMinElectronProbESD; // min probability for e+/e- PID not involving TPC
+ //
+ Float_t fCutMinP; // min P of V0
+ Float_t fCutMinRGamma; // min transv. distance from ESDVertex to V0 for gammas
+ Float_t fCutMinRK0; // min transv. distance from ESDVertex to V0 for K0s
+ Float_t fCutMinPointAngle; // min pointing angle cosine
+ Float_t fCutMaxDCADauther; // max DCA of daughters at V0
+ Float_t fCutMassGamma; // max gamma mass
+ Float_t fCutMassGammaNSigma; // max standard deviations from 0 for gamma
+ Float_t fCutMassK0; // max K0 mass difference from PGD value
+ Float_t fCutMassK0NSigma; // max standard deviations for K0 mass from PDG value
+ Float_t fCutChi2cGamma; // max constrained chi2 cut for gammas
+ Float_t fCutChi2cK0; // max constrained chi2 cut for K0s
+ Float_t fCutGammaSFromDecay; // min path*P for gammas
+ Float_t fCutK0SFromDecay; // min path*P for K0s
+ Float_t fCutMaxDCA; // max DCA for V0 at ESD vertex
+
+ Bool_t fHistOn; // Option to define and fill the histograms
+
+ TH1F* fhClustersDPhiAcc; // Phi2 - Phi1 for tracklets
+ TH1F* fhClustersDThetaAcc; // Theta2 - Theta1 for tracklets
+ TH1F* fhClustersDPhiAll; // Phi2 - Phi1 all the combinations
+ TH1F* fhClustersDThetaAll; // Theta2 - Theta1 all the combinations
- TH2F* fhDPhiVsDThetaAll;
- TH2F* fhDPhiVsDThetaAcc;
- TH2F* fhDPhiVsDZetaAll;
- TH2F* fhDPhiVsDZetaAcc;
+ TH2F* fhDPhiVsDThetaAll; // 2D plot for all the combinations
+ TH2F* fhDPhiVsDThetaAcc; // same plot for tracklets
+
+ TH1F* fhetaTracklets; // Pseudorapidity distr. for tracklets
+ TH1F* fhphiTracklets; // Azimuthal (Phi) distr. for tracklets
+ TH1F* fhetaClustersLay1; // Pseudorapidity distr. for Clusters L. 1
+ TH1F* fhphiClustersLay1; // Azimuthal (Phi) distr. for Clusters L. 1
- TH1F* fhetaTracklets;
- TH1F* fhphiTracklets;
- TH1F* fhetaClustersLay1;
- TH1F* fhphiClustersLay1;
void LoadClusterArrays(TTree* tree);
- ClassDef(AliITSMultReconstructor,0)
+ ClassDef(AliITSMultReconstructor,8)
};
#endif
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