SimG4ParticleSmearRootFile Class Reference

Root file particle smearing tool. More...

#include <SimG4ParticleSmearRootFile.h>

Inheritance diagram for SimG4ParticleSmearRootFile:

Collaboration diagram for SimG4ParticleSmearRootFile:

Public Member Functions
	SimG4ParticleSmearRootFile (const std::string &type, const std::string &name, const IInterface *parent)
virtual	~SimG4ParticleSmearRootFile ()
virtual StatusCode	initialize () final
	Initialize the tool and a random number generator.
virtual StatusCode	finalize () final
	Finalize.
virtual StatusCode	smearMomentum (CLHEP::Hep3Vector &aMom, int aPdg=0) final
	Smear the momentum of the particle.
StatusCode	readResolutions ()
	Read the file with the resolutions.
double	resolution (double aEta, double aMom)
	Read the file with the resolutions.
virtual StatusCode	checkConditions (double aMinMomentum, double aMaxMomentum, double aMaxEta) const final
	Check conditions of the smearing model, especially if the given parametrs do not exceed the parameters of the model.
Public Member Functions inherited from ISimG4ParticleSmearTool
	DeclareInterfaceID (ISimG4ParticleSmearTool, 1, 0)

Private Attributes
SmartIF< IRndmGenSvc >	m_randSvc
	Random Number Service.
IRndmGen *	m_gauss
	Gaussian random number generator used for smearing with a constant resolution (m_sigma)
std::map< double, TGraph >	m_momentumResolutions
	Map of p-dependent resolutions and the end of eta bin that it refers to (lower end is defined by previous entry, and eta=0 for the first one)
Gaudi::Property< std::string >	m_resolutionFileName
	File name with the resolutions obtained from root file (set by job options)
double	m_minMomentum
	minimum momentum defined in the resolution file
double	m_maxMomentum
	maximum momentum defined in the resolution file
double	m_maxEta
	maximum pseudorapidity defined in the resolution file

Detailed Description

Root file particle smearing tool.

The resolution dependence is read from the ROOT file, which path is given in configuration. Root file contains trees 'info' and 'resolutions'. 'info' has two arrays of type TArrayD containing edges of eta bins ('eta') and momentum values ('p'). 'resolutions' tree has TArrayD with resolutions computed for momentum values. An array is defined for every eta bin. Momentum of the particle is smeared following a Gaussian distribution, using the evaluated resolution as the mean. User needs to specify the min/max momentum nad max eta for fast sim in the SimG4FastSimTrackerRegion tool. The defined values cannot be broader than eta and p values for which the resolutions were computed.

Author

Anna Zaborowska

Constructor & Destructor Documentation

SimG4ParticleSmearRootFile()

SimG4ParticleSmearRootFile::SimG4ParticleSmearRootFile ( const std::string & type, const std::string & name, const IInterface * parent )

explicit

~SimG4ParticleSmearRootFile()

SimG4ParticleSmearRootFile::~SimG4ParticleSmearRootFile ( )

virtual

Member Function Documentation

checkConditions()

StatusCode SimG4ParticleSmearRootFile::checkConditions ( double aMinMomentum, double aMaxMomentum, double aMaxEta ) const

finalvirtual

Check conditions of the smearing model, especially if the given parametrs do not exceed the parameters of the model.

Parameters

[in]	aMinMomentum	Minimum momentum.
[in]	aMaxMomentum	Maximum momentum.
[in]	aMaxEta	Maximum pseudorapidity.

Returns

status code

Implements ISimG4ParticleSmearTool.

finalize()

StatusCode SimG4ParticleSmearRootFile::finalize ( )

finalvirtual

Finalize.

Returns

status code

initialize()

StatusCode SimG4ParticleSmearRootFile::initialize ( )

finalvirtual

Initialize the tool and a random number generator.

Returns

status code

readResolutions()

StatusCode SimG4ParticleSmearRootFile::readResolutions

(

)

Read the file with the resolutions.

File name is set by job options.

Returns

status code

resolution()

double SimG4ParticleSmearRootFile::resolution	(	double	aEta,
		double	aMom )

Read the file with the resolutions.

File name is set by job options.

Parameters

[in]	aEta	Particle's pseudorapidity
[in]	aMom	Particle's momentum

Returns

Resolution

smearMomentum()

StatusCode SimG4ParticleSmearRootFile::smearMomentum ( CLHEP::Hep3Vector & aMom, int aPdg = 0 )

finalvirtual

Smear the momentum of the particle.

Parameters

	aMom	Particle momentum to be smeared.
[in]	aPdg	Particle PDG code.

Returns

status code

Implements ISimG4ParticleSmearTool.

Member Data Documentation

m_gauss

IRndmGen* SimG4ParticleSmearRootFile::m_gauss

private

Gaussian random number generator used for smearing with a constant resolution (m_sigma)

m_maxEta

double SimG4ParticleSmearRootFile::m_maxEta

private

maximum pseudorapidity defined in the resolution file

m_maxMomentum

double SimG4ParticleSmearRootFile::m_maxMomentum

private

maximum momentum defined in the resolution file

m_minMomentum

double SimG4ParticleSmearRootFile::m_minMomentum

private

minimum momentum defined in the resolution file

m_momentumResolutions

std::map<double, TGraph> SimG4ParticleSmearRootFile::m_momentumResolutions

private

Map of p-dependent resolutions and the end of eta bin that it refers to (lower end is defined by previous entry, and eta=0 for the first one)

m_randSvc

SmartIF<IRndmGenSvc> SimG4ParticleSmearRootFile::m_randSvc

private

Random Number Service.

m_resolutionFileName

Gaudi::Property<std::string> SimG4ParticleSmearRootFile::m_resolutionFileName

private

Initial value:

{this, "filename", "",
                                                    "File name with the resolutions obtained from root file"}

File name with the resolutions obtained from root file (set by job options)

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

• SimG4Fast/src/components/SimG4ParticleSmearRootFile.h
• SimG4Fast/src/components/SimG4ParticleSmearRootFile.cpp