MCParticleInfo Class Reference

This struct is used by the TrackingPerformanceEvaluation Module to save information of reconstructed tracks. More...

#include <MCParticleInfo.h>

Public Member Functions
	MCParticleInfo (const MCParticle &the_mcParticle, const ROOT::Math::XYZVector &the_magField)
	Constructor.
double	getPx ()
	Getter for x component of momentum.
double	getPy ()
	Getter for y component of momentum.
double	getPz ()
	Getter for z component of momentum.
double	getPt ()
	Getter for transverse momentum.
double	getP ()
	Getter for magnitut of momentum.
double	getEnergy ()
	Getter for energy.
double	getX ()
	Getter for x component of vertex.
double	getY ()
	Getter for y component of vertex.
double	getZ ()
	Getter for z component of vertex.
double	getPtheta ()
	Getter for theta of momentum vector.
double	getPphi ()
	Getter for phi of momentum vector.
double	getCharge ()
	Getter for electric charge of particle.
double	getD0 ()
	Getter for D0.
double	getZ0 ()
	Getter for Z0.
double	getPhi ()
	Getter for Phi.
double	getOmega ()
	Getter for Omega.
double	getCotTheta ()
	Getter for Theta.
double	getLambda ()
	Getter for Lambda.
double	getChi ()
	Getter for Chi.

Private Attributes
const MCParticle &	m_mcParticle
	Reference to MC particle.
double	m_myBz
	Member variable for z component of B field.
double	m_charge
	Member variable for particle's electric charge.

Detailed Description

This struct is used by the TrackingPerformanceEvaluation Module to save information of reconstructed tracks.

Definition at line 22 of file MCParticleInfo.h.

Constructor & Destructor Documentation

MCParticleInfo()

MCParticleInfo	(	const MCParticle &	the_mcParticle,
		const ROOT::Math::XYZVector &	the_magField
	)

Constructor.

Definition at line 14 of file MCParticleInfo.cc.

  : m_mcParticle(the_mcParticle)
  , m_myBz(the_magField.R())
  , m_charge(the_mcParticle.getCharge())
{
  // set units to: cm, GeV/c
  m_myBz *= 0.299792 / 100;
} ;

Member Function Documentation

getCharge()

double getCharge ( )

inline

Getter for electric charge of particle.

Definition at line 55 of file MCParticleInfo.h.

{ return m_mcParticle.getCharge(); };

getChi()

double getChi

(

)

Getter for Chi.

Definition at line 50 of file MCParticleInfo.cc.

{
  double px = this->getPx();
  double py = this->getPy();
  double pt = this->getPt();
  double x = this->getX();
  double y = this->getY();
 
  double sinChi = -m_charge * (px * x + py * y);
  double cosChi = -m_charge * (px * y - py * x - (pt * pt) / m_charge / m_myBz);
 
  return  atan2(sinChi, cosChi);
 
};

getCotTheta()

double getCotTheta

(

)

Getter for Theta.

Definition at line 79 of file MCParticleInfo.cc.

{
  double tanDip = this->getPz() / this->getPt();
 
  return tanDip;
};

getD0()

double getD0

(

)

Getter for D0.

Definition at line 24 of file MCParticleInfo.cc.

{
 
  double pt = this->getPt();
  double px = this->getPx();
  double py = this->getPy();
  double x = this->getX();
  double y = this->getY();
  double R = 1 / this->getOmega(); //cm
 
  double alpha =  R / pt; //cm/GeV
  double Cx = x + alpha * py; //cm
  double Cy = y - alpha * px; //cm
  double d0 = sqrt(Cx * Cx + Cy * Cy) - R * m_charge; //cm
  d0 = d0 * m_charge;
 
  return d0;
};

getEnergy()

double getEnergy ( )

inline

Getter for energy.

Definition at line 40 of file MCParticleInfo.h.

{ return m_mcParticle.getEnergy(); };

getLambda()

double getLambda

(

)

Getter for Lambda.

Definition at line 87 of file MCParticleInfo.cc.

{
  double lambda = atan2(this->getPz(), this->getPt());
  return lambda;
};

getOmega()

double getOmega

(

)

Getter for Omega.

Definition at line 66 of file MCParticleInfo.cc.

{
  double R = this->getPt() / m_myBz / m_charge; // cm
  return 1 / R;
};

getP()

double getP ( )

inline

Getter for magnitut of momentum.

Definition at line 38 of file MCParticleInfo.h.

{ return m_mcParticle.getMomentum().R(); };

getPhi()

double getPhi

(

)

Getter for Phi.

Definition at line 44 of file MCParticleInfo.cc.

{
  return  atan2(this->getPy(), this->getPx()) - this->getChi();
};

getPphi()

double getPphi ( )

inline

Getter for phi of momentum vector.

Definition at line 52 of file MCParticleInfo.h.

{ return m_mcParticle.getMomentum().Phi(); };

getPt()

double getPt ( )

inline

Getter for transverse momentum.

Definition at line 36 of file MCParticleInfo.h.

{ return m_mcParticle.getMomentum().Rho(); };

getPtheta()

double getPtheta ( )

inline

Getter for theta of momentum vector.

Definition at line 50 of file MCParticleInfo.h.

{ return m_mcParticle.getMomentum().Theta(); };

getPx()

double getPx ( )

inline

Getter for x component of momentum.

Definition at line 30 of file MCParticleInfo.h.

{ return m_mcParticle.getMomentum().x(); };

getPy()

double getPy ( )

inline

Getter for y component of momentum.

Definition at line 32 of file MCParticleInfo.h.

{ return m_mcParticle.getMomentum().y(); };

getPz()

double getPz ( )

inline

Getter for z component of momentum.

Definition at line 34 of file MCParticleInfo.h.

{ return m_mcParticle.getMomentum().z(); };

getX()

double getX ( )

inline

Getter for x component of vertex.

Definition at line 43 of file MCParticleInfo.h.

{ return m_mcParticle.getVertex().X(); };

getY()

double getY ( )

inline

Getter for y component of vertex.

Definition at line 45 of file MCParticleInfo.h.

{ return m_mcParticle.getVertex().Y(); };

getZ()

double getZ ( )

inline

Getter for z component of vertex.

Definition at line 47 of file MCParticleInfo.h.

{ return m_mcParticle.getVertex().Z(); };

getZ0()

double getZ0

(

)

Getter for Z0.

Definition at line 73 of file MCParticleInfo.cc.

{
  return this->getZ() + this->getPz() / m_charge / m_myBz * this->getChi();
};

Member Data Documentation

m_charge

double m_charge

private

Member variable for particle's electric charge.

Definition at line 80 of file MCParticleInfo.h.

m_mcParticle

const MCParticle& m_mcParticle

private

Reference to MC particle.

Definition at line 76 of file MCParticleInfo.h.

m_myBz

double m_myBz

private

Member variable for z component of B field.

Definition at line 78 of file MCParticleInfo.h.

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

• tracking/dataobjects/include/MCParticleInfo.h
• tracking/dataobjects/src/MCParticleInfo.cc