PMD Z-position fixed at 361.5 instead of 365.0cm
[u/mrichter/AliRoot.git] / RALICE / AliTrack.h
d88f97cc 1#ifndef ALITRACK_H
2#define ALITRACK_H
959fbac5 3
3da30618 4/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
5 * See cxx source for full Copyright notice */
f531a546 7// $Id$
3da30618 8
959fbac5 9
d88f97cc 10#include "TObject.h"
11#include "TObjArray.h"
f531a546 12#include "TArrayD.h"
d88f97cc 13
959fbac5 14#include "AliSignal.h"
d88f97cc 15#include "AliBoost.h"
c72198f1 16#include "AliPositionObj.h"
d88f97cc 17
18class AliTrack : public TObject,public Ali4Vector
20 public:
c72198f1 21 AliTrack(); // Default constructor
22 virtual ~AliTrack(); // Destructor
23 AliTrack(AliTrack& t); // Copy constructor
1c01b4f8 24 virtual void Reset(); // Reset all values to 0
c72198f1 25 void Set4Momentum(Ali4Vector& p); // Set track 4-momentum
26 void Set3Momentum(Ali3Vector& p); // Set track 3-momentum
959fbac5 27 void SetMass(Double_t m,Double_t dm=0); // Set particle mass and error
c72198f1 28 void SetMass(); // Set mass and error to mass hypothesis with highest prob.
29 void SetCharge(Float_t q); // Set particle charge
1c01b4f8 30 virtual void Data(TString f="car"); // Print track information for coord. frame f
31 virtual void List(TString f="car"); // Print track and decay level 1 information for coord. frame f
32 virtual void ListAll(TString f="car");// Print track and all decay level information for coord. frame f
c72198f1 33 Ali3Vector Get3Momentum(); // Provide track 3-momentum
34 Double_t GetMomentum(); // Provide value of track 3-momentum
35 Double_t GetMass(); // Provide particle mass
36 Float_t GetCharge(); // Provide particle charge
37 Double_t GetEnergy(); // Provide particle total energy
d88f97cc 38 void Decay(Double_t m1,Double_t m2,Double_t thcms,Double_t phicms); // Perform 2-body decay
c72198f1 39 Int_t GetNdecay(); // Provide number of decay products
40 AliTrack* GetDecayTrack(Int_t j); // Access to decay produced track number j
41 void AddSignal(AliSignal& s); // Relate an AliSignal to this track
42 void RemoveSignal(AliSignal& s); // Remove related AliSignal from this track
43 Int_t GetNsignals(); // Provide number of related AliSignals
44 AliSignal* GetSignal(Int_t j); // Access to the related AliSignal number j
45 void SetBeginPoint(AliPosition& p); // Set the track begin-point
46 AliPosition* GetBeginPoint(); // Provide the track begin-point
47 void SetEndPoint(AliPosition& p); // Set the track end-point
48 AliPosition* GetEndPoint(); // Provide the track end-point
f531a546 49 void AddMassHypothesis(Double_t prob,Double_t m,Double_t dm=0); // Add mass hypothesis data
50 Int_t GetNMassHypotheses(); // Provide number of mass hypotheses
51 Double_t GetMassHypothesis(Int_t j=0); // Provide mass of jth hypothesis
52 Double_t GetMassHypothesisProb(Int_t j=0); // Provide prob. of jth mass hypothesis
53 void RemoveMassHypothesis(Int_t j); // Remove the jth mass hypothesis
c72198f1 54 Double_t GetPt(); // Provide trans. momentum w.r.t. z-axis
55 Double_t GetPl(); // Provide long. momentum w.r.t. z-axis
56 Double_t GetEt(); // Provide trans. energy w.r.t. z-axis
57 Double_t GetEl(); // Provide long. energy w.r.t. z-axis
58 Double_t GetMt(); // Provide trans. mass w.r.t. z-axis
59 Double_t GetMt(Int_t j); // Provide trans. mass w.r.t. z-axis and jth mass hypothesis
60 Double_t GetRapidity(); // Provide rapidity value w.r.t. z-axis
61 void SetImpactPoint(AliPosition& p,TString q); // Set the impact-point in plane "q=0"
62 AliPosition* GetImpactPoint(TString q); // Provide the impact-point in plane "q=0"
63 void SetId(Int_t id); // Set the user defined unique track identifier
64 Int_t GetId(); // Provide the user defined unique track identifier
65 void SetClosestPoint(AliPosition& p); // Set position p as point of closest approach w.r.t. some reference
66 AliPosition* GetClosestPoint(); // Provide point of closest approach w.r.t. some reference
67 void SetChi2(Float_t chi2); // Set the chi-squared value of the track fit
68 void SetNdf(Int_t ndf); // Set the number of degrees of freedom for the track fit
69 Float_t GetChi2(); // Provide the chi-squared value of the track fit
70 Int_t GetNdf(); // Provide the number of degrees of freedom for the track fit
71 void SetParticleCode(Int_t code); // Set the user defined particle id code (e.g. the PDF convention)
72 Int_t GetParticleCode(); // Provide the user defined particle id code
1fbffa23 73 void SetParentTrack(AliTrack* t); // Set pointer to the parent track
74 AliTrack* GetParentTrack(); // Provide pointer to the parent track
2693cb4e 75
d88f97cc 76
77 protected:
c72198f1 78 void Init(); // Initialisation of pointers etc...
79 Float_t fQ; // The charge of the particle
80 Int_t fNdec; // The number of decay products
81 TObjArray* fDecays; // The array of decay produced tracks
82 Int_t fNsig; // The number of related AliSignals
83 TObjArray* fSignals; // The array of related AliSignals
84 AliPositionObj* fBegin; // The begin-point of the track
85 AliPositionObj* fEnd; // The end-point of the track
86 Int_t fNmasses; // The number of mass hypotheses
87 TArrayD* fMasses; // The various mass hypotheses
88 TArrayD* fDmasses; // The errors on the various masses
89 TArrayD* fPmasses; // The probabilities of the various mass hypotheses
90 AliPositionObj* fImpactXY; // The (extrapolated) impact-point in the plane z=0
91 AliPositionObj* fImpactXZ; // The (extrapolated) impact-point in the plane y=0
92 AliPositionObj* fImpactYZ; // The (extrapolated) impact-point in the plane x=0
93 Int_t fUserId; // The user defined identifier
94 AliPositionObj* fClosest; // The (extrapolated) point of closest approach w.r.t some reference
95 Float_t fChi2; // The Chi-squared of the track fit
96 Int_t fNdf; // The number of degrees of freedom of the track fit
97 Int_t fCode; // The user defined particle id code
1fbffa23 98 AliTrack* fParent; // Pointer to the parent track
d88f97cc 99
100 private:
1c01b4f8 101 void Dumps(AliTrack* t,Int_t n,TString f); // Recursively print all decay levels
d88f97cc 102
1c01b4f8 103 ClassDef(AliTrack,7) // Handling of the attributes of a reconstructed particle track.
d88f97cc 104};