reco::Particle Class Reference

#include <Particle.h>

Public Types
typedef int	Charge
	electric charge type More...
typedef math::XYZTLorentzVector	LorentzVector
	Lorentz vector. More...
typedef math::XYZPoint	Point
	point in the space More...
typedef math::PtEtaPhiMLorentzVector	PolarLorentzVector
	Lorentz vector. More...
typedef math::XYZVector	Vector
	point in the space More...

Public Member Functions
Vector	boostToCM () const
int	charge () const
	electric charge More...
double	energy () const
	energy More...
double	et () const
	transverse energy More...
double	eta () const
	momentum pseudorapidity More...
bool	longLived () const
	is long lived? More...
double	mass () const
	mass More...
double	massSqr () const
	mass squared More...
Vector	momentum () const
	spatial momentum vector More...
double	mt () const
	transverse mass More...
double	mtSqr () const
	transverse mass squared More...
double	p () const
	magnitude of momentum vector More...
const LorentzVector &	p4 () const
	four-momentum Lorentz vector More...
	Particle ()
	default constructor More...
	Particle (Charge q, const LorentzVector &p4, const Point &vertex=Point(0, 0, 0), int pdgId=0, int status=0, bool integerCharge=true)
	constructor from values More...
	Particle (Charge q, const PolarLorentzVector &p4, const Point &vertex=Point(0, 0, 0), int pdgId=0, int status=0, bool integerCharge=true)
	constructor from values More...
int	pdgId () const
	PDG identifier. More...
double	phi () const
	momentum azimuthal angle More...
const PolarLorentzVector &	polarP4 () const
	four-momentum Lorentz vector More...
double	pt () const
	transverse momentum More...
double	px () const
	x coordinate of momentum vector More...
double	py () const
	y coordinate of momentum vector More...
double	pz () const
	z coordinate of momentum vector More...
double	rapidity () const
	repidity More...
void	setCharge (Charge q)
	set electric charge More...
void	setLongLived ()
	set long lived flag More...
void	setMass (double m)
	set particle mass More...
void	setP4 (const LorentzVector &p4)
	set 4-momentum More...
void	setP4 (const PolarLorentzVector &p4)
	set 4-momentum More...
void	setPdgId (int pdgId)
void	setPz (double pz)
void	setStatus (int status)
	set status word More...
void	setThreeCharge (Charge qx3)
	set electric charge More...
void	setVertex (const Point &vertex)
	set vertex More...
int	status () const
	status word More...
double	theta () const
	momentum polar angle More...
int	threeCharge () const
	electric charge More...
const Point &	vertex () const
	vertex position More...
double	vx () const
	x coordinate of vertex position More...
double	vy () const
	y coordinate of vertex position More...
double	vz () const
	z coordinate of vertex position More...
double	y () const
	repidity More...
virtual	~Particle ()
	destructor More...

Static Public Attributes
static const unsigned int	longLivedTag = 65536
	long lived flag More...

Protected Member Functions
void	cacheCartesian () const
	set internal cache More...
void	cachePolar () const
	set internal cache More...
void	clearCache () const
	clear internal cache More...

Protected Attributes
bool	cacheCartesianFixed_
bool	cachePolarFixed_
	has cache been set? More...
float	eta_
float	mass_
LorentzVector	p4Cartesian_
	internal cache for p4 More...
PolarLorentzVector	p4Polar_
	internal cache for p4 More...
int	pdgId_
	PDG identifier. More...
float	phi_
float	pt_
	four-momentum Lorentz vector More...
Charge	qx3_
	electric charge More...
int	status_
	status word More...
Point	vertex_
	vertex position More...

Detailed Description

Base class describing a generic reconstructed particle its main subclass is Candidate

Author

Luca Lista, INFN

Version

Id:

Particle.h,v 1.29 2011/10/27 16:29:58 wmtan Exp

Definition at line 20 of file Particle.h.

Member Typedef Documentation

typedef int reco::Particle::Charge

electric charge type

Definition at line 23 of file Particle.h.

typedef math::XYZTLorentzVector reco::Particle::LorentzVector

Lorentz vector.

Definition at line 25 of file Particle.h.

typedef math::XYZPoint reco::Particle::Point

point in the space

Definition at line 29 of file Particle.h.

typedef math::PtEtaPhiMLorentzVector reco::Particle::PolarLorentzVector

Lorentz vector.

Definition at line 27 of file Particle.h.

typedef math::XYZVector reco::Particle::Vector

point in the space

Definition at line 31 of file Particle.h.

Constructor & Destructor Documentation

reco::Particle::Particle ( )

inline

default constructor

Definition at line 33 of file Particle.h.

               :
      qx3_(0), pt_(0), eta_(0), phi_(0), mass_(0), 
      vertex_(0, 0, 0), pdgId_(0), status_(0),
      cachePolarFixed_( false ) { }

reco::Particle::Particle ( Charge  q, const LorentzVector &  p4, const Point &  vertex = Point( 0, 0, 0 ), int  pdgId = 0, int  status = 0, bool  integerCharge = true  )

inline

constructor from values

Definition at line 38 of file Particle.h.

References qx3_.

                                                                     : 
      qx3_( q ), pt_( p4.pt() ), eta_( p4.eta() ), phi_( p4.phi() ), mass_( p4.mass() ),
      vertex_( vertex ), pdgId_( pdgId ), status_( status ),
      cachePolarFixed_( false ), cacheCartesianFixed_( false ) { 
      if ( integerCharge ) qx3_ *= 3;
    }

reco::Particle::Particle ( Charge  q, const PolarLorentzVector &  p4, const Point &  vertex = Point( 0, 0, 0 ), int  pdgId = 0, int  status = 0, bool  integerCharge = true  )

inline

constructor from values

Definition at line 46 of file Particle.h.

References qx3_.

                                                                     : 
      qx3_( q ), pt_( p4.pt() ), eta_( p4.eta() ), phi_( p4.phi() ), mass_( p4.mass() ),
      vertex_( vertex ), pdgId_( pdgId ), status_( status ),
      cachePolarFixed_( false ), cacheCartesianFixed_( false ) { 
      if ( integerCharge ) qx3_ *= 3;
    }

virtual reco::Particle::~Particle ( )

inlinevirtual

destructor

Definition at line 54 of file Particle.h.

{ }

Member Function Documentation

Vector reco::Particle::boostToCM ( ) const

inline

boost vector to boost a Lorentz vector to the particle center of mass system

Definition at line 71 of file Particle.h.

References cacheCartesian(), and p4Cartesian_.

{ cacheCartesian(); return p4Cartesian_.BoostToCM(); }

void reco::Particle::cacheCartesian ( ) const

inlineprotected

set internal cache

Definition at line 188 of file Particle.h.

References cacheCartesianFixed_, cachePolar(), p4Cartesian_, and p4Polar_.

Referenced by boostToCM(), energy(), momentum(), p(), p4(), px(), py(), pz(), setPz(), and theta().

                                       { 
      if ( cacheCartesianFixed_ ) return;
      cachePolar();
      p4Cartesian_ = p4Polar_;
      cacheCartesianFixed_ = true;
    }

void reco::Particle::cachePolar ( ) const

inlineprotected

set internal cache

Definition at line 182 of file Particle.h.

References cachePolarFixed_, eta_, mass_, p4Polar_, phi_, and pt_.

Referenced by cacheCartesian(), et(), mt(), mtSqr(), polarP4(), and rapidity().

                                   { 
      if ( cachePolarFixed_ ) return;
      p4Polar_ = PolarLorentzVector( pt_, eta_, phi_, mass_ );
      cachePolarFixed_ = true;
    }

int reco::Particle::charge ( ) const

inline

electric charge

Definition at line 56 of file Particle.h.

References qx3_.

{ return qx3_ / 3; }

void reco::Particle::clearCache ( ) const

inlineprotected

clear internal cache

Definition at line 195 of file Particle.h.

References cacheCartesianFixed_, and cachePolarFixed_.

Referenced by setMass().

                                   { 
      cachePolarFixed_ = false;
      cacheCartesianFixed_ = false;
    }

double reco::Particle::energy ( ) const

inline

energy

Definition at line 75 of file Particle.h.

References cacheCartesian(), and p4Cartesian_.

Referenced by EmDQMReco::analyze().

{ cacheCartesian(); return p4Cartesian_.E(); }  

double reco::Particle::et ( ) const

inline

transverse energy

Definition at line 77 of file Particle.h.

References cachePolar(), and p4Polar_.

{ cachePolar(); return p4Polar_.Et(); }  

double reco::Particle::eta ( ) const

inline

momentum pseudorapidity

Definition at line 99 of file Particle.h.

References eta_.

Referenced by TopHLTDiMuonDQM::analyze().

{ return eta_; }

bool reco::Particle::longLived ( ) const

inline

is long lived?

Definition at line 162 of file Particle.h.

References longLivedTag, and status_.

{ return status_ & longLivedTag; }

double reco::Particle::mass ( ) const

inline

mass

Definition at line 79 of file Particle.h.

References mass_.

{ return mass_; }

double reco::Particle::massSqr ( ) const

inline

mass squared

Definition at line 81 of file Particle.h.

References mass_.

{ return mass_ * mass_; }

Vector reco::Particle::momentum ( ) const

inline

spatial momentum vector

Definition at line 68 of file Particle.h.

References cacheCartesian(), and p4Cartesian_.

{ cacheCartesian(); return p4Cartesian_.Vect(); }

double reco::Particle::mt ( ) const

inline

transverse mass

Definition at line 83 of file Particle.h.

References cachePolar(), and p4Polar_.

{ cachePolar(); return p4Polar_.Mt(); }

double reco::Particle::mtSqr ( ) const

inline

transverse mass squared

Definition at line 85 of file Particle.h.

References cachePolar(), and p4Polar_.

{ cachePolar(); return p4Polar_.Mt2(); }

double reco::Particle::p ( ) const

inline

magnitude of momentum vector

Definition at line 73 of file Particle.h.

References cacheCartesian(), and p4Cartesian_.

{ cacheCartesian(); return p4Cartesian_.P(); }

const LorentzVector& reco::Particle::p4 ( ) const

inline

four-momentum Lorentz vector

Definition at line 64 of file Particle.h.

References cacheCartesian(), and p4Cartesian_.

Referenced by TtDilepLRSignalSelObservables::operator()(), TtSemiLRJetCombObservables::operator()(), CandidateTriggerObjectProducer::produce(), setP4(), ParticleReplacerClass::transformMuMu2TauNu(), and ParticleReplacerClass::transformMuMu2TauTau().

{ cacheCartesian(); return p4Cartesian_; }

int reco::Particle::pdgId ( ) const

inline

PDG identifier.

Definition at line 150 of file Particle.h.

References pdgId_.

Referenced by TopHLTDiMuonDQM::analyze(), setPdgId(), ParticleReplacerClass::transformMuMu2TauNu(), and ParticleReplacerClass::transformMuMu2TauTau().

{ return pdgId_; }

double reco::Particle::phi ( ) const

inline

momentum azimuthal angle

Definition at line 95 of file Particle.h.

References phi_.

Referenced by TopHLTDiMuonDQM::analyze().

{ return phi_; }

const PolarLorentzVector& reco::Particle::polarP4 ( ) const

inline

four-momentum Lorentz vector

Definition at line 66 of file Particle.h.

References cachePolar(), and p4Polar_.

{ cachePolar(); return p4Polar_; }

double reco::Particle::pt ( ) const

inline

transverse momentum

Definition at line 93 of file Particle.h.

References pt_.

Referenced by IsMuMatchedToHLTSingleMu().

{ return pt_; }

double reco::Particle::px ( ) const

inline

x coordinate of momentum vector

Definition at line 87 of file Particle.h.

References cacheCartesian(), and p4Cartesian_.

{ cacheCartesian(); return p4Cartesian_.Px(); }

double reco::Particle::py ( ) const

inline

y coordinate of momentum vector

Definition at line 89 of file Particle.h.

References cacheCartesian(), and p4Cartesian_.

{ cacheCartesian(); return p4Cartesian_.Py(); }

double reco::Particle::pz ( ) const

inline

z coordinate of momentum vector

Definition at line 91 of file Particle.h.

References cacheCartesian(), and p4Cartesian_.

{ cacheCartesian(); return p4Cartesian_.Pz(); }

double reco::Particle::rapidity ( ) const

inline

repidity

Definition at line 101 of file Particle.h.

References cachePolar(), and p4Polar_.

Referenced by y().

{ cachePolar(); return p4Polar_.Rapidity(); }

void reco::Particle::setCharge ( Charge  q )

inline

set electric charge

Definition at line 58 of file Particle.h.

References qx3_.

{ qx3_ = q * 3; }

void reco::Particle::setLongLived ( )

inline

set long lived flag

Definition at line 160 of file Particle.h.

References longLivedTag, and status_.

{ status_ |= longLivedTag; }

void reco::Particle::setMass ( double  m )

inline

set particle mass

Definition at line 126 of file Particle.h.

References clearCache(), m, and mass_.

                             { 
      mass_ = m; 
      clearCache(); 
    }

void reco::Particle::setP4 ( const LorentzVector &  p4 )

inline

set 4-momentum

Definition at line 105 of file Particle.h.

References cacheCartesianFixed_, cachePolarFixed_, eta_, mass_, p4(), p4Cartesian_, p4Polar_, phi_, and pt_.

Referenced by ParticleReplacerClass::transformMuMu2TauNu(), and ParticleReplacerClass::transformMuMu2TauTau().

                                           { 
      p4Cartesian_ = p4;
      p4Polar_ = p4;
      pt_ = p4Polar_.pt();
      eta_ = p4Polar_.eta();
      phi_ = p4Polar_.phi();
      mass_ = p4Polar_.mass();
      cachePolarFixed_ = true;
      cacheCartesianFixed_ = true;      
    }

void reco::Particle::setP4 ( const PolarLorentzVector &  p4 )

inline

set 4-momentum

Definition at line 116 of file Particle.h.

References cacheCartesianFixed_, cachePolarFixed_, eta_, mass_, p4(), p4Polar_, phi_, and pt_.

                                                { 
      p4Polar_ = p4;
      pt_ = p4Polar_.pt();
      eta_ = p4Polar_.eta();
      phi_ = p4Polar_.phi();
      mass_ = p4Polar_.mass();
      cachePolarFixed_ = true;
      cacheCartesianFixed_ = false;            
    }

void reco::Particle::setPdgId ( int  pdgId )

inline

Definition at line 152 of file Particle.h.

References pdgId(), and pdgId_.

Referenced by TtDilepEvtSolution::getLeptNeg(), TtDilepEvtSolution::getLeptPos(), ParticleReplacerClass::transformMuMu2TauNu(), and ParticleReplacerClass::transformMuMu2TauTau().

{ pdgId_ = pdgId; }

void reco::Particle::setPz ( double  pz )

inline

Definition at line 130 of file Particle.h.

References cacheCartesian(), eta_, mass_, p4Cartesian_, p4Polar_, phi_, and pt_.

                            {
      cacheCartesian();
      p4Cartesian_.SetPz(pz);
      p4Polar_ = p4Cartesian_;
      pt_ = p4Polar_.pt();
      eta_ = p4Polar_.eta();
      phi_ = p4Polar_.phi();
      mass_ = p4Polar_.mass();
    }

void reco::Particle::setStatus ( int  status )

inline

set status word

Definition at line 156 of file Particle.h.

References status(), and status_.

Referenced by ParticleReplacerClass::produce(), ParticleReplacerClass::transformMuMu2TauNu(), and ParticleReplacerClass::transformMuMu2TauTau().

{ status_ = status; }

void reco::Particle::setThreeCharge ( Charge  qx3 )

inline

set electric charge

Definition at line 62 of file Particle.h.

References qx3_.

{ qx3_ = qx3; }

void reco::Particle::setVertex ( const Point &  vertex )

inline

set vertex

Definition at line 148 of file Particle.h.

References vertex(), and vertex_.

{ vertex_ = vertex; }

int reco::Particle::status ( ) const

inline

status word

Definition at line 154 of file Particle.h.

References status_.

Referenced by setStatus().

{ return status_; }

double reco::Particle::theta ( ) const

inline

momentum polar angle

Definition at line 97 of file Particle.h.

References cacheCartesian(), and p4Cartesian_.

{ cacheCartesian(); return p4Cartesian_.Theta(); }

int reco::Particle::threeCharge ( ) const

inline

electric charge

Definition at line 60 of file Particle.h.

References qx3_.

{ return qx3_; }

const Point& reco::Particle::vertex ( ) const

inline

vertex position

Definition at line 140 of file Particle.h.

References vertex_.

Referenced by setVertex().

{ return vertex_; }

double reco::Particle::vx ( ) const

inline

x coordinate of vertex position

Definition at line 142 of file Particle.h.

References vertex_.

{ return vertex_.X(); }

double reco::Particle::vy ( ) const

inline

y coordinate of vertex position

Definition at line 144 of file Particle.h.

References vertex_.

{ return vertex_.Y(); }

double reco::Particle::vz ( ) const

inline

z coordinate of vertex position

Definition at line 146 of file Particle.h.

References vertex_.

{ return vertex_.Z(); }

double reco::Particle::y ( ) const

inline

repidity

Definition at line 103 of file Particle.h.

References rapidity().

Referenced by svgfig.Ellipse::__repr__(), Vispa.Gui.WidgetContainer.WidgetContainer::autosize(), Vispa.Gui.VispaWidget.VispaWidget::boundingRect(), geometryXMLparser.Alignable::pos(), and Vispa.Gui.ConnectableWidget.ConnectableWidget::positionizeMenuWidget().

{ return rapidity(); }

Member Data Documentation

bool reco::Particle::cacheCartesianFixed_

mutableprotected

Definition at line 180 of file Particle.h.

Referenced by cacheCartesian(), clearCache(), and setP4().

bool reco::Particle::cachePolarFixed_

mutableprotected

has cache been set?

Definition at line 180 of file Particle.h.

Referenced by cachePolar(), clearCache(), and setP4().

float reco::Particle::eta_

protected

Definition at line 168 of file Particle.h.

Referenced by cachePolar(), eta(), setP4(), and setPz().

const unsigned int reco::Particle::longLivedTag = 65536

static

long lived flag

Definition at line 158 of file Particle.h.

Referenced by longLived(), and setLongLived().

float reco::Particle::mass_

protected

Definition at line 168 of file Particle.h.

Referenced by cachePolar(), mass(), massSqr(), setMass(), setP4(), and setPz().

LorentzVector reco::Particle::p4Cartesian_

mutableprotected

internal cache for p4

Definition at line 178 of file Particle.h.

Referenced by boostToCM(), cacheCartesian(), energy(), momentum(), p(), p4(), px(), py(), pz(), setP4(), setPz(), and theta().

PolarLorentzVector reco::Particle::p4Polar_

mutableprotected

internal cache for p4

Definition at line 176 of file Particle.h.

Referenced by cacheCartesian(), cachePolar(), et(), mt(), mtSqr(), polarP4(), rapidity(), setP4(), and setPz().

int reco::Particle::pdgId_

protected

PDG identifier.

Definition at line 172 of file Particle.h.

Referenced by pdgId(), and setPdgId().

float reco::Particle::phi_

protected

Definition at line 168 of file Particle.h.

Referenced by cachePolar(), phi(), setP4(), and setPz().

float reco::Particle::pt_

protected

four-momentum Lorentz vector

Definition at line 168 of file Particle.h.

Referenced by cachePolar(), pt(), setP4(), and setPz().

Charge reco::Particle::qx3_

protected

electric charge

Definition at line 166 of file Particle.h.

Referenced by charge(), Particle(), setCharge(), setThreeCharge(), and threeCharge().

int reco::Particle::status_

protected

status word

Definition at line 174 of file Particle.h.

Referenced by longLived(), setLongLived(), setStatus(), and status().

Point reco::Particle::vertex_

protected

vertex position

Definition at line 170 of file Particle.h.

Referenced by setVertex(), vertex(), vx(), vy(), and vz().