#ifndef ALITRACK_H #define ALITRACK_H /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * * See cxx source for full Copyright notice */ // $Id$ #include "TObject.h" #include "TObjArray.h" #include "TArrayD.h" #include "TArrayI.h" #include "AliSignal.h" #include "AliBoost.h" #include "AliPositionObj.h" class AliTrack : public TNamed,public Ali4Vector { public: AliTrack(); // Default constructor virtual ~AliTrack(); // Destructor AliTrack(const AliTrack& t); // Copy constructor virtual TObject* Clone(const char* name="") const; // Make a deep copy and provide its pointer virtual void Reset(); // Reset all values to 0 void Set4Momentum(Ali4Vector& p); // Set track 4-momentum void Set3Momentum(Ali3Vector& p); // Set track 3-momentum void SetMass(Double_t m,Double_t dm=0); // Set particle mass and error void SetMass(); // Set mass and error to the values of the hyp. with highest prob. void SetCharge(Float_t q); // Set particle charge virtual void Data(TString f="car"); // Print track information for coord. frame f virtual void List(TString f="car"); // Print track and decay level 1 information for coord. frame f virtual void ListAll(TString f="car"); // Print track and all decay level information for coord. frame f Ali3Vector Get3Momentum() const; // Provide track 3-momentum Double_t GetMomentum(); // Provide value of track 3-momentum Double_t GetMass(); // Provide particle mass Float_t GetCharge() const; // Provide particle charge Double_t GetEnergy(); // Provide particle total energy void Decay(Double_t m1,Double_t m2,Double_t thcms,Double_t phicms); // Perform 2-body decay Int_t GetNdecay() const; // Provide number of decay products AliTrack* GetDecayTrack(Int_t j) const; // Access to decay produced track number j void RemoveDecays(); // Remove all the decay products of this track void AddSignal(AliSignal& s); // Relate an AliSignal to this track void RemoveSignal(AliSignal& s); // Remove related AliSignal from this track void RemoveSignals(); // Remove all related AliSignals from this track Int_t GetNsignals() const; // Provide number of related AliSignals AliSignal* GetSignal(Int_t j) const; // Access to the related AliSignal number j void SetBeginPoint(AliPosition& p); // Set the track begin-point AliPosition* GetBeginPoint(); // Provide the track begin-point void SetEndPoint(AliPosition& p); // Set the track end-point AliPosition* GetEndPoint(); // Provide the track end-point void SetReferencePoint(AliPosition& p); // Set the track reference-point for the 3-momentum vector AliPosition* GetReferencePoint(); // Provide the track reference-point for the 3-momentum vector void AddTrackHypothesis(AliTrack& t); // Add track hypothesis void AddTrackHypothesis(Double_t prob,Double_t m,Double_t dm=0); // Add track hypothesis with mass data Int_t GetNhypotheses() const; // Provide number of track hypotheses AliTrack* GetTrackHypothesis(Int_t j=0) const; // Provide the j-th track hypothesis void RemoveTrackHypothesis(AliTrack& t);// Remove the specified track hypothesis void RemoveTrackHypotheses(); // Remove all track hypotheses Double_t GetPt(); // Provide trans. momentum w.r.t. z-axis Double_t GetPl(); // Provide long. momentum w.r.t. z-axis Double_t GetEt(); // Provide trans. energy w.r.t. z-axis Double_t GetEl(); // Provide long. energy w.r.t. z-axis Double_t GetMt(); // Provide trans. mass w.r.t. z-axis Double_t GetRapidity(); // Provide rapidity value w.r.t. z-axis void SetImpactPoint(AliPosition& p,TString q); // Set the impact-point in plane "q=0" AliPosition* GetImpactPoint(TString q); // Provide the impact-point in plane "q=0" void SetId(Int_t id); // Set the user defined unique track identifier Int_t GetId() const; // Provide the user defined unique track identifier void SetClosestPoint(AliPosition& p); // Set position p as point of closest approach w.r.t. some reference AliPosition* GetClosestPoint(); // Provide point of closest approach w.r.t. some reference void SetChi2(Float_t chi2); // Set the chi-squared value of the track fit void SetNdf(Int_t ndf); // Set the number of degrees of freedom for the track fit Float_t GetChi2() const; // Provide the chi-squared value of the track fit Int_t GetNdf() const; // Provide the number of degrees of freedom for the track fit void SetParticleCode(Int_t code); // Set the user defined particle id code (e.g. the PDF convention) Int_t GetParticleCode() const; // Provide the user defined particle id code void SetParentTrack(AliTrack* t); // Set pointer to the parent track AliTrack* GetParentTrack(); // Provide pointer to the parent track void SetProb(Double_t prob); // Set the hypothesis probability for this track Float_t GetProb() const; // Provide the hypothesis probability for this track protected: void Init(); // Initialisation of pointers etc... Float_t fQ; // The charge of the particle TObjArray* fDecays; // The array of decay produced tracks TObjArray* fSignals; // The array of related AliSignals TObjArray* fHypotheses; // The array of track hypotheses AliPositionObj* fBegin; // The begin-point of the track AliPositionObj* fEnd; // The end-point of the track AliPositionObj* fRef; // The reference-point of the track for the 3-momentum vector AliPositionObj* fImpactXY; // The (extrapolated) impact-point in the plane z=0 AliPositionObj* fImpactXZ; // The (extrapolated) impact-point in the plane y=0 AliPositionObj* fImpactYZ; // The (extrapolated) impact-point in the plane x=0 Int_t fUserId; // The user defined identifier AliPositionObj* fClosest; // The (extrapolated) point of closest approach w.r.t some reference Float_t fChi2; // The Chi-squared of the track fit Int_t fNdf; // The number of degrees of freedom of the track fit Int_t fCode; // The user defined particle id code AliTrack* fParent; // Pointer to the parent track Float_t fProb; // Probability for this track as a hypothesis private: void Dumps(AliTrack* t,Int_t n,TString f); // Recursively print all decay levels ClassDef(AliTrack,12) // Handling of the attributes of a reconstructed particle track. }; #endif