Smear::Device Class Reference

#include <Device.h>

Inheritance diagram for Smear::Device:

Public Member Functions
	Device (KinType=kE, const TString &formula="0", EGenre=kAll)
	Device (const TString &, const TString &resolution="0", EGenre=kAll)
	Device (const Device &)
virtual	~Device ()
virtual Device *	Clone (const char *="") const
virtual void	Smear (const erhic::VirtualParticle &, ParticleMCS &)
virtual void	SetDistribution (const Distributor &)
virtual void	Print (Option_t *="") const
Public Member Functions inherited from Smear::Smearer
virtual	~Smearer ()

Protected Member Functions
bool	Init (const TString &, const TString &, int)

Protected Attributes
KinType	mSmeared
	Smeared variable.
TF1 *	mKinematicFunction
FormulaString *	mFormula
	Expression for resolution standard deviation.
std::vector< Smear::KinType >	mDimensions
Distributor	mDistribution
	Random distribution.

Additional Inherited Members
Public Attributes inherited from Smear::Smearer
Acceptance	Accept

Detailed Description

Performs smearing of a single kinematic variable according to a simple expression defined via a string.

Definition at line 44 of file Device.h.

Constructor & Destructor Documentation

Smear::Device::Device	(	KinType	type = kE,
		const TString &	formula = "0",
		EGenre	genre = kAll
	)

Constructor. The first argument is the type of kinematic variable to smear. The second argument is a formula giving the width of the resolution in the variable selected with the first argument, i.e. sigma(A) = f(B, C...) where A, B, C... are selected from: E, P, theta, phi, pZ and pT, A is the variable type given for the first argument and B, C... are the variables listed in the formula. For example, for resolution in pT of 1% pT times sin of polar angle: Smear::Device(Smear::kPt, "0.01 * pT * sin(theta)"); See ROOT::TFormula for the form of valid expressions. Formulae can be a function of up to four variables. The third argument allows selection of the types of particles that are smeared: electromagnetic, hadronic or all.

Definition at line 43 of file Device.cxx.

Smear::Device::Device	(	const TString &	variable,
		const TString &	resolution = "0",
		EGenre	genre = kAll
	)

Constructor for smearing with an arbitrary function of a single variable. The first argument is a function of E, P, theta, phi, pT, or pZ. See ROOT::TFormula for syntax. For example, to smear in 1/pT: Smear::Device('1/pT', '<some resolution="" function>="">')

Definition at line 51 of file Device.cxx.

Smear::Device::Device

(

const Device &

that

)

Copy constructor.

Definition at line 59 of file Device.cxx.

Smear::Device::~Device ( )

virtual

Destructor.

Definition at line 74 of file Device.cxx.

Member Function Documentation

Device * Smear::Device::Clone ( const char *  = "" ) const

virtual

Returns a dynamically allocated copy of this object. The argument is unused and is present for compatibility with ROOT::TObject::Clone().

Implements Smear::Smearer.

Definition at line 112 of file Device.cxx.

void Smear::Device::Print ( Option_t *  = "" ) const

virtual

Print information about this device to standard output.

Definition at line 116 of file Device.cxx.

void Smear::Device::SetDistribution ( const Distributor &  d )

inlinevirtual

Set the random distribution from which to sample smeared kinematics. By default a Gaussian distribution is used.

Definition at line 132 of file Device.h.

void Smear::Device::Smear ( const erhic::VirtualParticle &  prt, ParticleMCS &  out  )

virtual

Smear the kinematic value of the input particle and store the result in the ParticleMCS. Smearing works in the following way. If we smear a variable VirtualParticle.X == x with parametrization f(x), then z[x,f(x)] will be stored in ParticleMCS.X, where z is a randomly generated number from a distribution of which x is the mean and f(xi) is the standard deviation. By default a Gaussian distribution is used. Use SetDistribution() for other distributions (and see Smear::Distributor).

Implements Smear::Smearer.

Reimplemented in Smear::Bremsstrahlung.

Definition at line 85 of file Device.cxx.

Member Data Documentation

std::vector<Smear::KinType> Smear::Device::mDimensions

protected

Variables on which smearing is dependent (up to 4)

Definition at line 121 of file Device.h.

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

• /Users/thomasburton/Documents/projects/eic-smear/include/eicsmear/smear/Device.h
• /Users/thomasburton/Documents/projects/eic-smear/src/smear/Device.cxx