Helper struct to provide consistent energy loss estimation throughout the CDC track finding. More...

Public Member Functions
	EnergyLossEstimator (double eDensity, double I, double bZ=NAN)
	Constructor from the material properties. More...

double	getBetheStoppingPower (double p, int pdgCode) const
	Stopping power aka energy loss / arc length. More...

double	getEnergyLoss (double p, int pdgCode, double arcLength) const
	Calculates the total energy loss after travelling the given distance.

double	getMomentumLossFactor (double p, int pdgCode, double arcLength) const
	Calculates a factor applicable scaling the current momentum to the momentum after traveling given arc length.

double	getLossDist2D (double pt, int pdgCode, double arcLength2D) const
	Calculates a correction term for the two dimensional distance undoing the energy loss after the given arc length.

Static Public Member Functions
static EnergyLossEstimator	forCDC ()
	Create an energy loss estimator with the material properties of the CDC.

static double	getMass (int pdgCode)
	Lookup the mass for the given pdg code.

static int	getCharge (int pdgCode)
	Lookup the charge for the given pdg code.

Private Attributes
double	m_eDensity
	Electron density in mol / cm^3.

double	m_I
	Mean excitation energy in GeV.

double	m_bZ
	B field to be used for the distance translation.

Detailed Description

Helper struct to provide consistent energy loss estimation throughout the CDC track finding.

Definition at line 22 of file EnergyLossEstimator.h.

Constructor & Destructor Documentation

Constructor from the material properties.

Parameters

eDensity	Electron density in mol / cm ^ 3, e.g. from Z * density / A
I	Excitation energy (must be given in standard GeV units)
bZ	Mean magentic field in the z direction

Definition at line 121 of file EnergyLossEstimator.cc.

   : m_eDensity(eDensity)
   , m_I(I)
   , m_bZ(bZ)
 {
 }

double getBetheStoppingPower	(	double	p,
		int	pdgCode
	)		const

Stopping power aka energy loss / arc length.

Parameters

p	absolute momentum
pdgCode

Definition at line 128 of file EnergyLossEstimator.cc.

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