#ifndef ALITPCTRACK_H #define ALITPCTRACK_H /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * * See cxx source for full Copyright notice */ /* $Id$ */ //------------------------------------------------------- // TPC Track Class // // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch //------------------------------------------------------- /***************************************************************************** * December 18, 2000 * * Internal view of the TPC track parametrisation as well as the order of * * track parameters are subject for possible changes ! * * Use GetExternalParameters() and GetExternalCovariance() to access TPC * * 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 azimuth angle * * external param3: tangent of the track momentum dip angle * * external param4: 1/pt (1/(GeV/c)) * *****************************************************************************/ #include #include #include "AliTPCreco.h" class AliBarrelTrack; class AliESDtrack; //_____________________________________________________________________________ class AliTPCtrack : public AliKalmanTrack { public: AliTPCtrack(); AliTPCtrack(UInt_t index, const Double_t xx[5], const Double_t cc[15], Double_t xr, Double_t alpha); AliTPCtrack(const AliKalmanTrack& t, Double_t alpha); AliTPCtrack(const AliESDtrack& t); AliTPCtrack(const AliTPCtrack& t); virtual ~AliTPCtrack() {} Int_t PropagateToVertex(Double_t x0=36.66,Double_t rho=1.2e-3); Int_t Rotate(Double_t angle); void SetdEdx(Double_t dedx) {fdEdx=dedx;} Double_t GetYat(Double_t x) const ; Double_t GetX() const {return fX;} Double_t GetAlpha() const {return fAlpha;} Double_t GetdEdx() const {return fdEdx;} Double_t GetPIDsignal() const {return GetdEdx();} Double_t GetY() const {return fP0;} Double_t GetZ() const {return fP1;} Double_t GetSnp() const {return fX*fP4 - fP2;} Double_t Get1Pt() const { return (1e-9*TMath::Abs(fP4)/fP4 + fP4)*GetConvConst(); } Double_t GetTgl() const {return fP3;} Double_t GetSigmaY2() const {return fC00;} Double_t GetSigmaZ2() const {return fC11;} // Some methods useful for users. Implementation is not // optimized for speed but for minimal maintanance effort Double_t Phi() const; Double_t Theta() const {return TMath::Pi()/2.-TMath::ATan(GetTgl());} Double_t Px() const {return TMath::Cos(Phi())/TMath::Abs(Get1Pt());} Double_t Py() const {return TMath::Sin(Phi())/TMath::Abs(Get1Pt());} Double_t Pz() const {return GetTgl()/TMath::Abs(Get1Pt());} Double_t Pt() const {return 1./TMath::Abs(Get1Pt());} Double_t P() const {return TMath::Sqrt(Pt()*Pt()+Pz()*Pz());} Int_t Compare(const TObject *o) const; void GetExternalParameters(Double_t& xr, Double_t x[5]) const ; void GetExternalCovariance(Double_t cov[15]) const ; // [SR, 01.04.2003] void GetBarrelTrack(AliBarrelTrack *track); void ResetNWrong() {fNWrong = 0;} void ResetNRotation() {fNRotation = 0;} Int_t GetNWrong() const {return fNWrong;} Int_t GetNRotation() const {return fNRotation;} Int_t GetNumber() const {return fNumber;} void SetNumber(Int_t n) {fNumber = n;} // Int_t GetClusterIndex(Int_t i) const {return fIndex[i];} //******** To be removed next release !!! ************** Double_t GetEta() const {return fP2;} Double_t GetC() const {return fP4;} void GetCovariance(Double_t cc[15]) const { cc[0 ]=fC00; cc[1 ]=fC10; cc[2 ]=fC11; cc[3 ]=fC20; cc[4 ]=fC21; cc[5 ]=fC22; cc[6 ]=fC40; cc[7 ]=fC41; cc[8 ]=fC42; cc[9 ]=fC44; cc[10]=fC30; cc[11]=fC31; cc[12]=fC32; cc[13]=fC43; cc[14]=fC33; } //****************************************************** virtual Double_t GetPredictedChi2(const AliCluster *cluster) const; Int_t PropagateTo(Double_t xr,Double_t x0=28.94,Double_t rho=0.9e-3); Int_t Update(const AliCluster* c, Double_t chi2, UInt_t i); void ResetCovariance(); // MI addition Float_t fSdEdx; // sigma of dedx // Int_t fNFoundable; //number of foundable clusters - dead zone taken to the account Bool_t fBConstrain; // indicate seeding with vertex constrain Int_t fLastPoint; // last cluster position Int_t fFirstPoint; // first cluster position Int_t fRemoval; // removal factor Int_t fTrackType; // track type - 0 - normal - 1 - kink - 2 -V0 3- double found Int_t fLab2; // index of corresponding track (kink, V0, double) Int_t fNShared; // number of shared points Float_t fKinkPoint[12]; //radius, of kink, dfi and dtheta // // TClonesArray * fHelixIn; //array of helixes //TClonesArray * fHelixOut; //array of helixes // Float_t Density(Int_t row0, Int_t row1); //calculate cluster density Float_t Density2(Int_t row0, Int_t row1); //calculate cluster density Double_t GetZat0() const; Double_t GetD(Double_t x=0, Double_t y=0) const; protected: Double_t fX; // X-coordinate of this track (reference plane) Double_t fAlpha; // Rotation angle the local (TPC sector) // coordinate system and the global ALICE one. Double_t fdEdx; // dE/dx Double_t fP0; // Y-coordinate of a track Double_t fP1; // Z-coordinate of a track Double_t fP2; // C*x0 Double_t fP3; // tangent of the track momentum dip angle Double_t fP4; // track curvature 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 Int_t fIndex[kMaxRow]; // indices of associated clusters //[SR, 01.04.2003] Int_t fNWrong; // number of wrong clusters Int_t fNRotation; // number of rotations Int_t fNumber; // magic number used for number of clusters ClassDef(AliTPCtrack,1) // Time Projection Chamber reconstructed tracks }; inline void AliTPCtrack::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(); } #endif