genie::BBA03ELFormFactorsModel Class Reference

Concrete implementation of the ELFormFactorsModelI interface. Computes elastic form factors using the BBA2003 parameterization. More...

#include <BBA03ELFormFactorsModel.h>

Inheritance diagram for genie::BBA03ELFormFactorsModel:

Public Member Functions
	BBA03ELFormFactorsModel ()
	BBA03ELFormFactorsModel (string config)
virtual	~BBA03ELFormFactorsModel ()
double	Gep (const Interaction *interaction) const
	Compute the elastic form factor G_{ep} for the input interaction. More...
double	Gmp (const Interaction *interaction) const
	Compute the elastic form factor G_{mp} for the input interaction. More...
double	Gen (const Interaction *interaction) const
	Compute the elastic form factor G_{en} for the input interaction. More...
double	Gmn (const Interaction *interaction) const
	Compute the elastic form factor G_{mn} for the input interaction. More...
void	Configure (const Registry &config)
void	Configure (string param_set)
Public Member Functions inherited from genie::ELFormFactorsModelI
virtual	~ELFormFactorsModelI ()
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	LoadConfig (void)
double	BBA03Fit (double q2, double g0, const BBA2003Fit_t &fp) const

Private Attributes
BBA2003Fit_t	fGep
	BBA2003 fit coefficients for Gep. More...
BBA2003Fit_t	fGmp
	BBA2003 fit coefficients for Gmp. More...
BBA2003Fit_t	fGmn
	BBA2003 fit coefficients for Gmn. More...
double	fGenA
	Krutov parameterization for Gen. More...
double	fGenB
	Krutov parameterization for Gen. More...
double	fQ2Max
	Gep/Gmp assummed const for Q2 > Q2Max. More...
double	fMv
	Elactic vector mass. More...
double	fMv2
	Elactic vector mass. More...
double	fMuP
	Anomalous proton magnetic moment. More...
double	fMuN
	Anomalous neutron magnetic moment. More...

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::ELFormFactorsModelI
	ELFormFactorsModelI ()
	ELFormFactorsModelI (string name)
	ELFormFactorsModelI (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

Concrete implementation of the ELFormFactorsModelI interface. Computes elastic form factors using the BBA2003 parameterization.

H.Budd, NuINT-02 proceedings

Author

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

Oct 19, 2005

Copyright (c) 2003-2020, The GENIE Collaboration For the full text of the license visit http://copyright.genie-mc.org

Definition at line 34 of file BBA03ELFormFactorsModel.h.

Constructor & Destructor Documentation

BBA03ELFormFactorsModel::BBA03ELFormFactorsModel

(

)

Definition at line 21 of file BBA03ELFormFactorsModel.cxx.

                                                 :
ELFormFactorsModelI("genie::BBA03ELFormFactorsModel")
{

}

BBA03ELFormFactorsModel::BBA03ELFormFactorsModel

(

string

config

)

Definition at line 27 of file BBA03ELFormFactorsModel.cxx.

                                                              :
ELFormFactorsModelI("genie::BBA03ELFormFactorsModel", config)
{

}

BBA03ELFormFactorsModel::~BBA03ELFormFactorsModel ( )

virtual

Definition at line 33 of file BBA03ELFormFactorsModel.cxx.

{

}

Member Function Documentation

double BBA03ELFormFactorsModel::BBA03Fit ( double  q2, double  g0, const BBA2003Fit_t &  fp  ) const

private

Definition at line 140 of file BBA03ELFormFactorsModel.cxx.

{
// The BBA2003 inverse polynomizal fit function for Gep,Gmp,Gmn
// Inputs:
//       q2  : momentum transfer, <0
//       g0  : G(q2=0) -> Gep=1, Gmp=mup, Gmn=mun (mu:magnetic moment)
//       fit : BBA2003 fit parameters for either Gep,Gmp,Gmn

  double Q2  = -q2;
  double Q4  =  Q2  * Q2;
  double Q6  =  Q4  * Q2;
  double Q8  =  Q6  * Q2;
  double Q10 =  Q8  * Q2;
  double Q12 =  Q10 * Q2;

  double g = g0 / (1. + fit.a2*Q2 + fit.a4*Q4 + fit.a6*Q6 +
                                   fit.a8*Q8 + fit.a10*Q10 + fit.a12*Q12);
  return g;
}

void BBA03ELFormFactorsModel::Configure ( const Registry &  config )

virtual

Configure the algorithm with an external registry The registry is merged with the top level registry if it is owned, Otherwise a copy of it is added with the highest priority

Reimplemented from genie::Algorithm.

Definition at line 86 of file BBA03ELFormFactorsModel.cxx.

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

void BBA03ELFormFactorsModel::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 92 of file BBA03ELFormFactorsModel.cxx.

{
  Algorithm::Configure(param_set);
  this->LoadConfig();
}

double BBA03ELFormFactorsModel::Gen ( const Interaction *  interaction ) const

virtual

Compute the elastic form factor G_{en} for the input interaction.

Implements genie::ELFormFactorsModelI.

Definition at line 61 of file BBA03ELFormFactorsModel.cxx.

{
  double q2  = interaction->Kine().q2();

  const Target & tgt = interaction->InitState().Tgt();

  double M   = tgt.HitNucMass();             // Mnucl
  double M2  = TMath::Power(M,2);            // Mnucl^2
  double t   = -q2/(4*M2);                   // q2<0
  double a   = fGenA;                        // Krutov et al. parameter a
  double b   = fGenB;                        // Krutov et al. parameter b
  double mv2 = fMv2;                         // elastic vector mass^2
  double GD  = 1./TMath::Power(1-q2/mv2,2.); // dipole form factor

  double gen = -1. * fMuN * a * t * GD / (1 + b*t);
  return gen;
}

double BBA03ELFormFactorsModel::Gep ( const Interaction *  interaction ) const

virtual

Compute the elastic form factor G_{ep} for the input interaction.

Implements genie::ELFormFactorsModelI.

Definition at line 38 of file BBA03ELFormFactorsModel.cxx.

{
  double gep = 0;
  double q2  = interaction->Kine().q2();

  if( TMath::Abs(q2) > fQ2Max ) {
     double gepmx = this->BBA03Fit(-fQ2Max, 1.,   fGep);
     double gmpmx = this->BBA03Fit(-fQ2Max, fMuP, fGmp);
     double gmp   = this->BBA03Fit(q2, fMuP, fGmp);
     gep = gmp * (gepmx/gmpmx);
  } else {
     gep = this->BBA03Fit(q2, 1., fGep);
  }
  return gep;
}

double BBA03ELFormFactorsModel::Gmn ( const Interaction *  interaction ) const

virtual

Compute the elastic form factor G_{mn} for the input interaction.

Implements genie::ELFormFactorsModelI.

Definition at line 79 of file BBA03ELFormFactorsModel.cxx.

{
  double q2  = interaction->Kine().q2();
  double gmn = this->BBA03Fit(q2, fMuN, fGmn);
  return gmn;
}

double BBA03ELFormFactorsModel::Gmp ( const Interaction *  interaction ) const

virtual

Compute the elastic form factor G_{mp} for the input interaction.

Implements genie::ELFormFactorsModelI.

Definition at line 54 of file BBA03ELFormFactorsModel.cxx.

{
  double q2  = interaction->Kine().q2();
  double gmp = this->BBA03Fit(q2, fMuP, fGmp);
  return gmp;
}

void BBA03ELFormFactorsModel::LoadConfig ( void  )

private

Definition at line 98 of file BBA03ELFormFactorsModel.cxx.

{
  //-- load BBA03 model parameters

  // BBA2003 fit coefficients
  GetParam( "BBA03-Gep-a2", fGep.a2 ) ;
  GetParam( "BBA03-Gep-a4", fGep.a4 ) ;
  GetParam( "BBA03-Gep-a6", fGep.a6 ) ;
  GetParam( "BBA03-Gep-a8", fGep.a8 ) ;
  GetParam( "BBA03-Gep-a10", fGep.a10 ) ;
  GetParam( "BBA03-Gep-a12", fGep.a12 ) ;

  GetParam( "BBA03-Gmp-a2", fGmp.a2 ) ;
  GetParam( "BBA03-Gmp-a4", fGmp.a4 ) ;
  GetParam( "BBA03-Gmp-a6", fGmp.a6 ) ;
  GetParam( "BBA03-Gmp-a8", fGmp.a8 ) ;
  GetParam( "BBA03-Gmp-a10", fGmp.a10 ) ;
  GetParam( "BBA03-Gmp-a12", fGmp.a12 ) ;

  GetParam( "BBA03-Gmn-a2", fGmn.a2 ) ;
  GetParam( "BBA03-Gmn-a4", fGmn.a4 ) ;
  GetParam( "BBA03-Gmn-a6", fGmn.a6 ) ;
  GetParam( "BBA03-Gmn-a8", fGmn.a8 ) ;
  GetParam( "BBA03-Gmn-a10", fGmn.a10 ) ;
  GetParam( "BBA03-Gmn-a12", fGmn.a12 ) ;

  // Krutov parameters
  GetParam( "BBA03-Gen-a", fGenA ) ;
  GetParam( "BBA03-Gen-b", fGenB ) ;

  // Q2max
  GetParam( "BBA03-Q2Max", fQ2Max ) ;

  // vector mass
  GetParam( "EL-Mv",fMv ) ;
  fMv2 = TMath::Power(fMv,2);

  // anomalous magnetic moments
  GetParam( "AnomMagnMoment-P", fMuP ) ;
  GetParam( "AnomMagnMoment-N", fMuN ) ;
}

Member Data Documentation

double genie::BBA03ELFormFactorsModel::fGenA

private

Krutov parameterization for Gen.

Definition at line 64 of file BBA03ELFormFactorsModel.h.

double genie::BBA03ELFormFactorsModel::fGenB

private

Krutov parameterization for Gen.

Definition at line 65 of file BBA03ELFormFactorsModel.h.

BBA2003Fit_t genie::BBA03ELFormFactorsModel::fGep

private

BBA2003 fit coefficients for Gep.

Definition at line 61 of file BBA03ELFormFactorsModel.h.

BBA2003Fit_t genie::BBA03ELFormFactorsModel::fGmn

private

BBA2003 fit coefficients for Gmn.

Definition at line 63 of file BBA03ELFormFactorsModel.h.

BBA2003Fit_t genie::BBA03ELFormFactorsModel::fGmp

private

BBA2003 fit coefficients for Gmp.

Definition at line 62 of file BBA03ELFormFactorsModel.h.

double genie::BBA03ELFormFactorsModel::fMuN

private

Anomalous neutron magnetic moment.

Definition at line 70 of file BBA03ELFormFactorsModel.h.

double genie::BBA03ELFormFactorsModel::fMuP

private

Anomalous proton magnetic moment.

Definition at line 69 of file BBA03ELFormFactorsModel.h.

double genie::BBA03ELFormFactorsModel::fMv

private

Elactic vector mass.

Definition at line 67 of file BBA03ELFormFactorsModel.h.

double genie::BBA03ELFormFactorsModel::fMv2

private

Elactic vector mass.

Definition at line 68 of file BBA03ELFormFactorsModel.h.

double genie::BBA03ELFormFactorsModel::fQ2Max

private

Gep/Gmp assummed const for Q2 > Q2Max.

Definition at line 66 of file BBA03ELFormFactorsModel.h.

---

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

• Generator/src/Physics/QuasiElastic/XSection/BBA03ELFormFactorsModel.h
• Generator/src/Physics/QuasiElastic/XSection/BBA03ELFormFactorsModel.cxx