#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 "AliSignal.h" #include "AliBoost.h" #include "AliPositionObj.h" class AliTrack : public TObject,public Ali4Vector { public: AliTrack(); // Default constructor virtual ~AliTrack(); // Destructor AliTrack(AliTrack& t); // Copy constructor 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 mass hypothesis with highest prob. void SetCharge(Float_t q); // Set particle charge void Data(TString f="car"); // Print track information for coord. frame f void List(TString f="car"); // Print track and decay level 1 information for coord. frame f void ListAll(TString f="car"); // Print track and all decay level information for coord. frame f Ali3Vector Get3Momentum(); // Provide track 3-momentum Double_t GetMomentum(); // Provide value of track 3-momentum Double_t GetMass(); // Provide particle mass Float_t GetCharge(); // 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(); // Provide number of decay products AliTrack* GetDecayTrack(Int_t j); // Access to decay produced track number j void AddSignal(AliSignal& s); // Relate an AliSignal to this track void RemoveSignal(AliSignal& s); // Remove related AliSignal from this track Int_t GetNsignals(); // Provide number of related AliSignals AliSignal* GetSignal(Int_t j); // 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 AddMassHypothesis(Double_t prob,Double_t m,Double_t dm=0); // Add mass hypothesis data Int_t GetNMassHypotheses(); // Provide number of mass hypotheses Double_t GetMassHypothesis(Int_t j=0); // Provide mass of jth hypothesis Double_t GetMassHypothesisProb(Int_t j=0); // Provide prob. of jth mass hypothesis void RemoveMassHypothesis(Int_t j); // Remove the jth mass hypothesis 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 GetMt(Int_t j); // Provide trans. mass w.r.t. z-axis and jth mass hypothesis 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(); // 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(); // Provide the chi-squared value of the track fit Int_t GetNdf(); // 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(); // 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 protected: void Init(); // Initialisation of pointers etc... Float_t fQ; // The charge of the particle Int_t fNdec; // The number of decay products TObjArray* fDecays; // The array of decay produced tracks Int_t fNsig; // The number of related AliSignals TObjArray* fSignals; // The array of related AliSignals AliPositionObj* fBegin; // The begin-point of the track AliPositionObj* fEnd; // The end-point of the track Int_t fNmasses; // The number of mass hypotheses TArrayD* fMasses; // The various mass hypotheses TArrayD* fDmasses; // The errors on the various masses TArrayD* fPmasses; // The probabilities of the various mass hypotheses 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 private: void Dump(AliTrack* t,Int_t n,TString f); // Recursively print all decay levels ClassDef(AliTrack,5) // Handling of the attributes of a reconstructed particle track. }; #endif