// ITS Track Class
//
// Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
+// dEdx analysis by: Boris Batyunya, JINR, Boris.Batiounia@cern.ch
//-------------------------------------------------------------------------
-
-/*****************************************************************************
- * December 18, 2000 *
- * Internal view of the ITS track parametrisation as well as the order of *
- * track parameters are subject for possible changes ! *
- * Use GetExternalParameters() and GetExternalCovariance() to access ITS *
- * track information regardless of its internal representation. *
- * This formation is now fixed in the following way: *
- * external param0: local Y-coordinate of a track (cm) *
- * external param1: local Z-coordinate of a track (cm) *
- * external param2: local sine of the track momentum azimuthal angle *
- * external param3: tangent of the track momentum dip angle *
- * external param4: 1/pt (1/(GeV/c)) *
- *****************************************************************************/
-
#include <AliKalmanTrack.h>
+#include "AliITSRecoParam.h"
-#include "AliITSrecoV2.h"
-
-class AliTPCtrack;
+class AliESDtrack;
//_____________________________________________________________________________
-class AliITStrackV2 : public AliKalmanTrack {
+class AliITStrackV2 : public AliKalmanTrack {
public:
- AliITStrackV2():AliKalmanTrack(){}
- AliITStrackV2(const AliTPCtrack& t) throw (const Char_t *);
+ AliITStrackV2();
+ AliITStrackV2(AliESDtrack& t,Bool_t c=kFALSE) throw (const Char_t *);
AliITStrackV2(const AliITStrackV2& t);
- Int_t
- PropagateToVertex(Double_t x0=36.66,Double_t rho=1.2e-3,Double_t pm=0.139);
- void SetdEdx(Float_t dedx) {fdEdx=dedx;}
+
+ Bool_t CorrectForMaterial(Double_t d, Double_t x0=kX0Air) {
+ return AliExternalTrackParam::CorrectForMaterial(d,x0,GetMass());
+ }
+ Bool_t CorrectForMeanMaterial(Double_t xOverX0, Double_t xTimesRho) {
+ return AliExternalTrackParam::CorrectForMeanMaterial(xOverX0,xTimesRho,GetMass());
+ }
+ Bool_t PropagateTo(Double_t xr, Double_t d, Double_t x0=kX0Air);
+ Bool_t PropagateToTGeo(Double_t xToGo, Int_t nstep=1);
+ Double_t GetPredictedChi2(const AliCluster *cluster) const;
+ Bool_t Update(const AliCluster *cl, Double_t chi2, Int_t i);
+
+ Bool_t
+ PropagateToVertex(const AliESDVertex *v,Double_t d=0.,Double_t x0=0.);
+ Bool_t Propagate(Double_t alpha, Double_t xr);
+ Bool_t MeanBudgetToPrimVertex(Double_t xyz[3], Double_t step, Double_t &d) const;
+ Bool_t Improve(Double_t x0,Double_t xyz[3],Double_t ers[3]);
+
+ void SetdEdx(Double_t dedx) {fdEdx=dedx;}
+ void SetSampledEdx(Float_t q, Int_t i);
+ Float_t GetSampledEdx(Int_t i) const {return fdEdxSample[i];}
+ void CookdEdx(Double_t low=0., Double_t up=0.51);
void SetDetectorIndex(Int_t i) {SetLabel(i);}
+ void ResetClusters() { SetChi2(0.); SetNumberOfClusters(0); }
+ void UpdateESDtrack(ULong_t flags) const;
- void *operator new(size_t s,void *p) { return p; }
- void *operator new(size_t s) { return ::operator new(s); }
-
- Int_t GetDetectorIndex() const {return GetLabel();}
- Double_t GetX() const {return fX;}
- Double_t GetAlpha()const {return fAlpha;}
- Float_t GetdEdx() const {return fdEdx;}
-
- Double_t GetY() const {return fP0;}
- Double_t GetZ() const {return fP1;}
- Double_t GetSnp() const {return fP2;}
- Double_t GetTgl() const {return fP3;}
- Double_t Get1Pt() const {return fP4*GetConvConst();}
-
-
- Double_t GetD() const;
-
+ AliESDtrack *GetESDtrack() const {return fESDtrack;}
- Double_t GetSigmaY2() const {return fC00;}
- Double_t GetSigmaZ2() const {return fC11;}
+ Int_t GetDetectorIndex() const {return GetLabel();}
+ Double_t GetdEdx() const {return fdEdx;}
+ Double_t GetPIDsignal() const {return GetdEdx();}
+ Double_t GetC() const {return AliExternalTrackParam::GetC(GetBz());}
+ Double_t GetD(Double_t x, Double_t y) const {
+ return AliExternalTrackParam::GetD(x,y,GetBz());
+ }
+ void GetDZ(Double_t xv, Double_t yv, Double_t zv, Float_t dz[2]) const {
+ return AliExternalTrackParam::GetDZ(xv,yv,zv,GetBz(),dz);
+ }
+
+ Bool_t GetGlobalXYZat(Double_t r,Double_t &x,Double_t &y,Double_t &z) const;
+ Bool_t GetPhiZat(Double_t r,Double_t &phi,Double_t &z) const;
Int_t Compare(const TObject *o) const;
-
- void GetExternalParameters(Double_t& xr, Double_t x[5]) const ;
- void GetExternalCovariance(Double_t cov[15]) const ;
-
Int_t GetClusterIndex(Int_t i) const {return fIndex[i];}
- Int_t GetGlobalXYZat(Double_t r,Double_t &x,Double_t &y,Double_t &z) const;
-
- Int_t Propagate(Double_t alpha,
- Double_t xr,Double_t x0,Double_t rho,Double_t pm=0.139);
-
- Double_t GetPredictedChi2(const AliCluster *cluster) const;
- Int_t Update(const AliCluster* cl,Double_t chi2,UInt_t i);
-
- Double_t GetPredictedChi2(const AliCluster *cluster, Double_t *m,
- Double_t x0, Double_t pm=0.139) const;
- Int_t Update(const Double_t *m, Double_t chi2, UInt_t i);
- Int_t Improve(Double_t x0,Double_t yv,Double_t zv);
+ Bool_t Invariant() const;
- Int_t Invariant() const;
+ void SetExtraCluster(Int_t i, Int_t idx) {fIndex[kMaxLayer+i]=idx;}
+ Int_t GetExtraCluster(Int_t i) const {return fIndex[kMaxLayer+i];}
- //protected:
-Int_t
-PropagateTo(Double_t xr,Double_t x0=21.82,Double_t rho=2.33,Double_t pm=0.139);
-
-private:
- Double_t fX; // X-coordinate of this track (reference plane)
- Double_t fAlpha; // rotation angle
+protected:
+ Double_t GetBz() const ;
+ Double_t fdEdx; // dE/dx
- Double_t fdEdx; // dE/dx
+ static const Int_t fgkWARN; //! used for debugging purposes
+ Float_t fdEdxSample[4]; // array of dE/dx samples b.b.
- Double_t fP0; // Y-coordinate of a track
- Double_t fP1; // Z-coordinate of a track
- Double_t fP2; // sine of the track momentum azimuthal angle
- Double_t fP3; // tangent of the track momentum dip angle
- Double_t fP4; // track curvature
+ Int_t fIndex[2*kMaxLayer]; // indices of associated clusters
- Double_t fC00; // covariance
- Double_t fC10, fC11; // matrix
- Double_t fC20, fC21, fC22; // of the
- Double_t fC30, fC31, fC32, fC33; // track
- Double_t fC40, fC41, fC42, fC43, fC44; // parameters
+ AliESDtrack *fESDtrack; //! pointer to the connected ESD track
- UInt_t fIndex[kMaxLayer]; // indices of associated clusters
-
- ClassDef(AliITStrackV2,1) //ITS reconstructed track
+private:
+ AliITStrackV2 &operator=(const AliITStrackV2 &tr);
+ ClassDef(AliITStrackV2,7) //ITS reconstructed track
};
-inline
-void AliITStrackV2::GetExternalParameters(Double_t& xr, Double_t x[5]) const {
- //---------------------------------------------------------------------
- // This function return external TPC track representation
- //---------------------------------------------------------------------
- xr=fX;
- x[0]=GetY(); x[1]=GetZ(); x[2]=GetSnp(); x[3]=GetTgl(); x[4]=Get1Pt();
+inline
+void AliITStrackV2::SetSampledEdx(Float_t q, Int_t i) {
+ //----------------------------------------------------------------------
+ // This function stores dEdx sample corrected for the track segment length
+ // Origin: Boris Batyunya, JINR, Boris.Batiounia@cern.ch
+ //----------------------------------------------------------------------
+ if (i<0) return;
+ if (i>3) return;
+ Double_t s=GetSnp(), t=GetTgl();
+ q *= TMath::Sqrt((1-s*s)/(1+t*t));
+ fdEdxSample[i]=q;
}
#endif
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff