#define ALITPCTRACKERPARAM_H
/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. */
/* See cxx source for full Copyright notice */
+
+/* $Id$ */
+
+
//-----------------------------------------------------------------------------
// TPC Tracking Parameterization Class
//
// Origin: Andrea Dainese, Padova - e-mail: andrea.dainese@pd.infn.it
//-----------------------------------------------------------------------------
+#include <TMatrixD.h>
#include "alles.h"
-#include "AliMagF.h"
#include "AliGausCorr.h"
+#include "AliMagF.h"
+#include "AliTPCkineGrid.h"
#include "AliTPCtrack.h"
class AliTPCtrackerParam {
+ /////////////////////////////////////////////////////////////////////////
+ //
+ // This class builds AliTPCtrack objects from generated tracks to feed
+ // ITS tracking (V2). The AliTPCtrack is built from its first hit in
+ // the TPC. The track is assigned a Kalman-like covariance matrix
+ // depending on its pT and pseudorapidity and track parameters are
+ // smeared according to this covariance matrix.
+ // Output file contains sorted tracks, ready for matching with ITS.
+ //
+ // For details:
+ // http://www.pd.infn.it/alipd/talks/soft/adIII02/TPCtrackingParam.htm
+ //
+ // Test macro is: AliBarrelRec_TPCparam.C
+ //
+ // Origin: Andrea Dainese, Padova - e-mail: andrea.dainese@pd.infn.it
+ //
+ /////////////////////////////////////////////////////////////////////////
public:
AliTPCtrackerParam(const Int_t coll=0,const Double_t Bz=0.4);
virtual ~AliTPCtrackerParam();
-
+ // this function performs the parameterized tracking
Int_t BuildTPCtracks(const TFile *inp, TFile *out,Int_t n=1);
- private:
- Int_t fColl; // collision code (0: PbPb6000)
- Double_t fBz; // value of the z component of L3 field (Tesla)
-
-
- AliTPCtrack* BuildTrack(Double_t alpha,Double_t x,Double_t y,Double_t z,
- Double_t px,Double_t py,Double_t pz,Double_t pt,
- Int_t ch,Int_t lab) const ;
-
- Bool_t SelectedTrack(Int_t pdg, Double_t pt, Double_t eta) const;
-
- Int_t GetBin(Double_t pt,Double_t eta) const;
-
- TMatrixD GetSmearingMatrix(Double_t* cc, Double_t pt,Double_t eta) const;
+ // these functions are used to create a DB of cov. matrices,
+ // including regularization, efficiencies and dE/dx
+ void AllGeantTracks() { fSelAndSmear=kFALSE; return; }
+ void AnalyzedEdx(const Char_t *outName,Int_t pdg);
+ void AnalyzePulls(const Char_t *outName);
+ void CompareTPCtracks(const Char_t *galiceName="galice.root",
+ const Char_t *trkGeaName="AliTPCtracksGeant.root",
+ const Char_t *trkKalName="AliTPCtracksSorted.root",
+ const Char_t *covmatName="CovMatrix.root",
+ const Char_t *tpceffName="TPCeff.dat") const;
+ void DrawEffs(const Char_t *inName,Int_t pdg=211);
+ void DrawPulls(const Char_t *inName,Int_t pdg=211,Int_t par=0);
+ void MakeDataBase();
+ void MergeEvents(Int_t evFirst=1,Int_t evLast=1);
+ void RegularizeCovMatrix(const Char_t *outName,Int_t pdg);
+
+ class AliTPCtrackParam : public AliTPCtrack {
+ public:
+ AliTPCtrackParam():AliTPCtrack(){}
+ AliTPCtrackParam(const AliTPCtrack &t):AliTPCtrack(t){}
+
+ void AssignMass(Double_t mass) {SetMass(mass); return;}
+
+ private:
- void SmearTrack(Double_t* xx,Double_t* xxsm,TMatrixD cov) const;
+ };
- Double_t LinearInterpolation(Int_t ptBins,Double_t *value,Double_t pt,Double_t eta) const;
+ private:
+ Double_t fBz; // value of the z component of L3 field (Tesla)
+ Int_t fColl; // collision code (0: PbPb6000)
+ Bool_t fSelAndSmear; // if kFALSE returns GEANT tracks
+ // at TPC first hit
+ TString fDBfileName; // DataBase file name
- void CookTracks(TObjArray& tarray,TObjArray& newtarray) const;
+ AliTPCtrack fTrack; // current track
+
+ TTree *fCovTree; // tree with regularized cov matrices
+ // for the current track
+
+ AliTPCkineGrid *fDBgrid; // grid for the cov matrix look-up table
+ AliTPCkineGrid fDBgridPi; // " for pions
+ AliTPCkineGrid fDBgridKa; // " for kaons
+ AliTPCkineGrid fDBgridEl; // " for electrons
+
+ AliTPCkineGrid *fEff; // TPC efficiencies for the current track
+ AliTPCkineGrid fEffPi; // " pions
+ AliTPCkineGrid fEffKa; // " kaons
+ AliTPCkineGrid fEffPr; // " protons
+ AliTPCkineGrid fEffEl; // " electrons
+ AliTPCkineGrid fEffMu; // " muons
+
+ AliTPCkineGrid *fPulls; // pulls for the current track
+ AliTPCkineGrid fPullsPi[5]; // " pions
+ AliTPCkineGrid fPullsKa[5]; // " muons
+ AliTPCkineGrid fPullsEl[5]; // " electrons
+
+ TMatrixD *fRegPar; // regularization parameters for the curr. track
+ TMatrixD fRegParPi; // " for pions
+ TMatrixD fRegParKa; // " for kaons
+ TMatrixD fRegParEl; // " for electrons
+
+ AliTPCkineGrid *fdEdxMean; // dEdx mean for the current track
+ AliTPCkineGrid fdEdxMeanPi; // " pions
+ AliTPCkineGrid fdEdxMeanKa; // " kaons
+ AliTPCkineGrid fdEdxMeanPr; // " protons
+ AliTPCkineGrid fdEdxMeanEl; // " electrons
+
+ AliTPCkineGrid *fdEdxRMS; // dEdx RMS for the current track
+ AliTPCkineGrid fdEdxRMSPi; // " pions
+ AliTPCkineGrid fdEdxRMSKa; // " kaons
+ AliTPCkineGrid fdEdxRMSPr; // " protons
+ AliTPCkineGrid fdEdxRMSEl; // " electrons
+
+
+ void BuildTrack(Double_t alpha,Double_t x,Double_t y,Double_t z,
+ Double_t px,Double_t py,Double_t pz,Double_t pt,
+ Int_t ch);
+ void CookdEdx(Double_t pt,Double_t eta);
+ void CookTrack(Double_t pt,Double_t eta);
+ Int_t GetBin(Double_t pt,Double_t eta) const;
+ TMatrixD GetSmearingMatrix(Double_t *cc, Double_t pt,Double_t eta) const;
+ void InitializeKineGrid(Option_t *which,Option_t *how);
+ Int_t ReadAllData(const Char_t *inName);
+ Int_t ReadDBgrid(const Char_t *inName);
+ Int_t ReaddEdx(const Char_t *inName,Int_t pdg);
+ Int_t ReadEffs(const Char_t *inName);
+ Int_t ReadPulls(const Char_t *inName);
+ Int_t ReadRegParams(const Char_t *inName,Int_t pdg);
+ Bool_t SelectedTrack(Double_t pt, Double_t eta) const;
+ void SetParticle(Int_t pdg);
+ void SmearTrack(Double_t *xx,Double_t *xxsm,TMatrixD cov) const;
+ Int_t WritedEdx(const Char_t *outName,Int_t pdg);
+ Int_t WriteEffs(const Char_t *outName);
+ Int_t WritePulls(const Char_t *outName);
+ Int_t WriteRegParams(const Char_t *outName,Int_t pdg);
ClassDef(AliTPCtrackerParam,1) // TPC tracking parameterization class
#endif
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