#ifndef ALITRACK_H
#define ALITRACK_H
+
/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
* See cxx source for full Copyright notice */
-/* $Id$ */
+// $Id$
+
-///////////////////////////////////////////////////////////////////////////
-// Class AliTrack
-// Handling of the attributes of a reconstructed particle track.
-//
-// Coding example :
-// ----------------
-//
-// Float_t a[4]={195.,1.2,-0.04,8.5};
-// Ali4Vector pmu;
-// pmu.SetVector(a,"car");
-// AliTrack t1;
-// t1.Set4Momentum(pmu);
-//
-// Float_t b[3]={1.2,-0.04,8.5};
-// Ali3Vector p;
-// p.SetVector(b,"car");
-// AliTrack t2;
-// t2.Set3Momentum(p);
-// t2.SetCharge(0);
-// t2.SetMass(1.115);
-//
-// t1.Info();
-// t2.Info();
-//
-// Float_t pi=acos(-1.);
-// Float_t thcms=0.2*pi; // decay theta angle in cms
-// Float_t phicms=pi/4.; // decay theta angle in cms
-// Float_t m1=0.938;
-// Float_t m2=0.140;
-// t2.Decay(m1,m2,thcms,phicms); // Track t2 decay : Lambda -> proton + pion
-//
-// t2.List();
-//
-// Int_t ndec=t2.GetNdecay();
-// AliTrack* d1=t2.GetDecayTrack(1); // Access to decay track number 1
-// AliTrack* d2=t2.GetDecayTrack(2); // Access to decay track number 2
-//
-// Note : All quantities are in GeV, GeV/c or GeV/c**2
-//
-//--- NvE 10-jul-1997 UU-SAP Utrecht
-//--- Modified : NvE 06-apr-1999 UU-SAP Utrecht to inherit from Ali4Vector
-///////////////////////////////////////////////////////////////////////////
-
#include "TObject.h"
#include "TObjArray.h"
+#include "TArrayD.h"
+#include "AliSignal.h"
#include "AliBoost.h"
+#include "AliPosition.h"
class AliTrack : public TObject,public Ali4Vector
{
public:
AliTrack(); // Default constructor
~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); // Set particle mass
+ 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 Info(TString f="car"); // Print track information for coord. frame f
+ 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
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
+
protected:
- Double_t fM; // The mass of the particle
- Float_t fQ; // The charge of the particle
- Int_t fNdec; // The number of decay products
- TObjArray* fDecays; // The array of decay produced tracks for output
+ 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
+ AliPosition fBegin; // The begin-point of the track
+ AliPosition 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
+ AliPosition fImpactXY; // The (extrapolated) impact-point in the plane z=0
+ AliPosition fImpactXZ; // The (extrapolated) impact-point in the plane y=0
+ AliPosition fImpactYZ; // The (extrapolated) impact-point in the plane x=0
+ Int_t fUserId; // The user defined identifier
+ AliPosition 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
private:
void Dump(AliTrack* t,Int_t n,TString f); // Recursively print all decay levels
- ClassDef(AliTrack,1) // Class definition to enable ROOT I/O
+ ClassDef(AliTrack,3) // Handling of the attributes of a reconstructed particle track.
};
#endif
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff