The Peterson fragmentation function. Is a concrete implementation of the FragmentationFunctionI interface. More...

#include <PetersonFragm.h>

Inheritance diagram for genie::PetersonFragm:

Public Member Functions
	PetersonFragm ()

	PetersonFragm (string config)

	~PetersonFragm ()

double	Value (double z) const
	implement the FragmentationFunctionI interface More...

double	GenerateZ (void) const

void	Configure (const Registry &config)

void	Configure (string config)

Public Member Functions inherited from genie::FragmentationFunctionI
virtual	~FragmentationFunctionI ()

Public Member Functions inherited from genie::Algorithm
virtual	~Algorithm ()

virtual void	FindConfig (void)

virtual const Registry &	GetConfig (void) const

Registry *	GetOwnedConfig (void)

virtual const AlgId &	Id (void) const
	Get algorithm ID. More...

virtual AlgStatus_t	GetStatus (void) const
	Get algorithm status. More...

virtual bool	AllowReconfig (void) const

virtual AlgCmp_t	Compare (const Algorithm *alg) const
	Compare with input algorithm. More...

virtual void	SetId (const AlgId &id)
	Set algorithm ID. More...

virtual void	SetId (string name, string config)

const Algorithm *	SubAlg (const RgKey &registry_key) const

void	AdoptConfig (void)

void	AdoptSubstructure (void)

virtual void	Print (ostream &stream) const
	Print algorithm info. More...

Private Member Functions
void	BuildFunction (void)

Private Attributes
TF1 *	fFunc

Additional Inherited Members
Static Public Member Functions inherited from genie::Algorithm
static string	BuildParamVectKey (const std::string &comm_name, unsigned int i)

static string	BuildParamVectSizeKey (const std::string &comm_name)

Protected Member Functions inherited from genie::FragmentationFunctionI
	FragmentationFunctionI ()

	FragmentationFunctionI (string name)

	FragmentationFunctionI (string name, string config)

Protected Member Functions inherited from genie::Algorithm
	Algorithm ()

	Algorithm (string name)

	Algorithm (string name, string config)

void	Initialize (void)

void	DeleteConfig (void)

void	DeleteSubstructure (void)

Registry *	ExtractLocalConfig (const Registry &in) const

Registry *	ExtractLowerConfig (const Registry &in, const string &alg_key) const
	Split an incoming configuration Registry into a block valid for the sub-algo identified by alg_key. More...

template<class T >
bool	GetParam (const RgKey &name, T &p, bool is_top_call=true) const

template<class T >
bool	GetParamDef (const RgKey &name, T &p, const T &def) const

template<class T >
int	GetParamVect (const std::string &comm_name, std::vector< T > &v, bool is_top_call=true) const
	Handle to load vectors of parameters. More...

int	GetParamVectKeys (const std::string &comm_name, std::vector< RgKey > &k, bool is_top_call=true) const

int	AddTopRegistry (Registry *rp, bool owns=true)
	add registry with top priority, also update ownership More...

int	AddLowRegistry (Registry *rp, bool owns=true)
	add registry with lowest priority, also update ownership More...

int	MergeTopRegistry (const Registry &r)

int	AddTopRegisties (const vector< Registry * > &rs, bool owns=false)
	Add registries with top priority, also udated Ownerships. More...

Protected Attributes inherited from genie::Algorithm
bool	fAllowReconfig

bool	fOwnsSubstruc
	true if it owns its substructure (sub-algs,...) More...

AlgId	fID
	algorithm name and configuration set More...

vector< Registry * >	fConfVect

vector< bool >	fOwnerships
	ownership for every registry in fConfVect More...

AlgStatus_t	fStatus
	algorithm execution status More...

AlgMap *	fOwnedSubAlgMp
	local pool for owned sub-algs (taken out of the factory pool) More...

Detailed Description

The Peterson fragmentation function. Is a concrete implementation of the FragmentationFunctionI interface.

C.Peterson et al., Phys.Rev.D23, 56 (1981)

Author: Costas Andreopoulos <constantinos.andreopoulos cern.ch> University of Liverpool & STFC Rutherford Appleton Laboratory

June 15, 2004

Definition at line 31 of file PetersonFragm.h.

Constructor & Destructor Documentation

PetersonFragm::PetersonFragm ( )

Definition at line 19 of file PetersonFragm.cxx.

                              :
 FragmentationFunctionI("genie::PetersonFragm")
 {
 
 }

PetersonFragm::PetersonFragm ( string config )

Definition at line 25 of file PetersonFragm.cxx.

                                           :
 FragmentationFunctionI("genie::PetersonFragm", config)
 {
   this->BuildFunction();
 }

PetersonFragm::~PetersonFragm ( )

Definition at line 31 of file PetersonFragm.cxx.

 {
   delete fFunc;
 }

Member Function Documentation

void PetersonFragm::BuildFunction ( void )

private

Definition at line 63 of file PetersonFragm.cxx.

 {
   fFunc = new TF1("fFunc",genie::utils::frgmfunc::peterson_func,0,1,2);
 
   fFunc->SetParNames("Norm","Epsilon");
   // stop ROOT from deleting this object of its own volition
   gROOT->GetListOfFunctions()->Remove(fFunc);
 
   double N = -1. ;
   GetParam( "PetFrag-Norm", N, false ) ;
 
   //The xml files says that Epsilon is not optional, while the
   //orignal behaviour of this function assigned a 0 default value
   //if the xml file was not providing such a number.
   // Original behaviour maintained
   double e = 0. ;
   GetParam( "PetFrag-Epsilon", e, false ) ;
 
   // if the normalization parameter was left negative, explicitly normalize
   // the fragmentation function
   if(N<0) {
     N=1;
     fFunc->SetParameters(N,e);
     double I = fFunc->Integral(0,1);
     assert(I>0);
     N = 1./I;
   }
   fFunc->SetParameters(N,e);
 }

void PetersonFragm::Configure ( const Registry & config )

virtual

methods overloading the Algorithm() interface implementation to build the fragmentation function from configuration data

Reimplemented from genie::Algorithm.

Definition at line 51 of file PetersonFragm.cxx.

 {
   Algorithm::Configure(config);
   this->BuildFunction();
 }

void PetersonFragm::Configure ( string config )

virtual

Configure the algorithm from the AlgoConfigPool based on param_set string given in input An algorithm contains a vector of registries coming from different xml configuration files, which are loaded according a very precise prioriy This methods will load a number registries in order of priority: 1) "Tunable" parameter set from CommonParametes. This is loaded with the highest prioriry and it is designed to be used for tuning procedure Usage not expected from the user. 2) For every string defined in "CommonParame" the corresponding parameter set will be loaded from CommonParameter.xml 3) parameter set specified by the config string and defined in the xml file of the algorithm 4) if config is not "Default" also the Default parameter set from the same xml file will be loaded Effectively this avoids the repetion of a parameter when it is not changed in the requested configuration

Reimplemented from genie::Algorithm.

Definition at line 57 of file PetersonFragm.cxx.

 {
   Algorithm::Configure(config);
   this->BuildFunction();
 }

double PetersonFragm::GenerateZ ( void ) const

virtual

Implements genie::FragmentationFunctionI.

Definition at line 44 of file PetersonFragm.cxx.

 {
 // Return a random number using the fragmentation function as PDF
 
   return fFunc->GetRandom();
 }

double PetersonFragm::Value ( double z ) const

virtual

implement the FragmentationFunctionI interface

Implements genie::FragmentationFunctionI.

Definition at line 36 of file PetersonFragm.cxx.

 {
 // Evaluate the fragmentation function
 
   if(z<0 || z>1) return 0;
   return fFunc->Eval(z);
 }

Member Data Documentation

TF1* genie::PetersonFragm::fFunc

private

Definition at line 49 of file PetersonFragm.h.

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

Generator/src/Physics/Hadronization/PetersonFragm.h
Generator/src/Physics/Hadronization/PetersonFragm.cxx

Public Member Functions

Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation