Trk::TrackJet Class Reference

short class to organise reconstructed Trk::Track objects as a jet. More...

#include <TrackJet.h>

Collaboration diagram for Trk::TrackJet:

Public Member Functions
	TrackJet ()
	default constructor
	TrackJet (const TrackJet &a)
	copy constructor
	~TrackJet ()
	destructor
void	setEnergy (double energy)
double	getEnergy ()
Trk::Track *	getTrack (unsigned int i)
std::vector< Trk::Track * >	getTracks ()
int	getNumTracks ()
void	addTrack (Trk::Track *trk)
	the main method used during build-up clustering: adds track and re-calculated the jet quantities
HepGeom::Vector3D< double >	getMomentum ()
double	getThrust ()
double	getSphericity ()

Private Member Functions
double	thisEnergy (const Trk::Track *i)

Private Attributes
std::vector< Trk::Track * >	m_tracks
double	m_energy
HepGeom::Vector3D< double >	m_momentum
double	m_totalPt2
double	m_totalMom2
double	m_pDotJetAxis
double	m_magP

Detailed Description

short class to organise reconstructed Trk::Track objects as a jet.

Needed at the level of tracking validation and not to be confused with the calorimeter-seeded jet in combined reconstruction.

Author

Loek Hooft van Huysduynen

Definition at line 31 of file TrackJet.h.

Constructor & Destructor Documentation

TrackJet() [1/2]

Trk::TrackJet::TrackJet ( )

inline

default constructor

Definition at line 36 of file TrackJet.h.

            : m_tracks(), m_energy(0.), m_momentum(0.0, 0.0, 0.0), m_totalPt2(0.), m_totalMom2(0.), m_pDotJetAxis(0.), m_magP(0.)
    {
        
    };

TrackJet() [2/2]

Trk::TrackJet::TrackJet ( const TrackJet & a )

inline

copy constructor

Definition at line 41 of file TrackJet.h.

                             {
       m_tracks = a.m_tracks;
       m_energy = a.m_energy;
       m_momentum = a.m_momentum;
       m_totalPt2 = a.m_totalPt2;
       m_totalMom2 = a.m_totalMom2;
       m_pDotJetAxis = a.m_pDotJetAxis;
       m_magP = a.m_magP;
  };

~TrackJet()

Trk::TrackJet::~TrackJet ( )

inline

destructor

Definition at line 51 of file TrackJet.h.

{}; // destructor

Member Function Documentation

addTrack()

void Trk::TrackJet::addTrack ( Trk::Track * trk )

inline

the main method used during build-up clustering: adds track and re-calculated the jet quantities

Definition at line 68 of file TrackJet.h.

                              {
    m_tracks.push_back(trk);
    m_energy = m_energy + thisEnergy(trk);
    HepGeom::Vector3D<double> moment = trk->perigeeParameters()->momentum();
    m_momentum = m_momentum + moment;
 
    double longMoment = fabs((trk->perigeeParameters()->momentum()).dot((m_momentum)/(m_momentum.mag())));
    m_totalPt2 = m_totalPt2 + pow(trk->perigeeParameters()->momentum().mag(), 2) - pow((longMoment), 2);
    m_pDotJetAxis = m_pDotJetAxis + longMoment;
    m_magP = m_magP + trk->perigeeParameters()->momentum().mag();
    m_totalMom2 = m_totalMom2 + pow((trk->perigeeParameters()->momentum().mag()), 2);
  }

getEnergy()

double Trk::TrackJet::getEnergy ( )

inline

Definition at line 55 of file TrackJet.h.

{return m_energy;}

getMomentum()

HepGeom::Vector3D< double > Trk::TrackJet::getMomentum ( )

inline

Definition at line 81 of file TrackJet.h.

{return m_momentum;}

getNumTracks()

int Trk::TrackJet::getNumTracks ( )

inline

Definition at line 64 of file TrackJet.h.

{return m_tracks.size();}

getSphericity()

double Trk::TrackJet::getSphericity ( )

inline

Definition at line 84 of file TrackJet.h.

{return m_totalPt2/m_totalMom2;}

getThrust()

double Trk::TrackJet::getThrust ( )

inline

Definition at line 83 of file TrackJet.h.

{return m_pDotJetAxis/m_magP;}

getTrack()

Trk::Track * Trk::TrackJet::getTrack ( unsigned int i )

inline

Definition at line 57 of file TrackJet.h.

    {
      return m_tracks.at(i);
    }

getTracks()

std::vector< Trk::Track * > Trk::TrackJet::getTracks ( )

inline

Definition at line 62 of file TrackJet.h.

{return m_tracks;}

setEnergy()

void Trk::TrackJet::setEnergy ( double energy )

inline

Definition at line 53 of file TrackJet.h.

{m_energy = energy;}

thisEnergy()

double Trk::TrackJet::thisEnergy ( const Trk::Track * i )

inlineprivate

Definition at line 96 of file TrackJet.h.

    {
      HepGeom::Vector3D<double> moment = i->perigeeParameters()->momentum();
      return sqrt(moment.dot(moment) +ParticleConstants::chargedPionMassInMeV*ParticleConstants::chargedPionMassInMeV );
    }

Member Data Documentation

m_energy

double Trk::TrackJet::m_energy

private

Definition at line 89 of file TrackJet.h.

m_magP

double Trk::TrackJet::m_magP

private

Definition at line 94 of file TrackJet.h.

m_momentum

HepGeom::Vector3D<double> Trk::TrackJet::m_momentum

private

Definition at line 90 of file TrackJet.h.

m_pDotJetAxis

double Trk::TrackJet::m_pDotJetAxis

private

Definition at line 93 of file TrackJet.h.

m_totalMom2

double Trk::TrackJet::m_totalMom2

private

Definition at line 92 of file TrackJet.h.

m_totalPt2

double Trk::TrackJet::m_totalPt2

private

Definition at line 91 of file TrackJet.h.

m_tracks

std::vector<Trk::Track* > Trk::TrackJet::m_tracks

private

Definition at line 88 of file TrackJet.h.

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The documentation for this class was generated from the following file:

• TrackJet.h