genie::DFRXSec Class Reference

Computes the cross section for DFR neutrino-nucleus pi production.
Is a concrete implementation of the XSecIntegratorI interface. More...

#include <DFRXSec.h>

Inheritance diagram for genie::DFRXSec:

Collaboration diagram for genie::DFRXSec:

Public Member Functions
	DFRXSec ()
	DFRXSec (std::string config)
virtual	~DFRXSec ()
double	Integrate (const XSecAlgorithmI *model, const Interaction *i) const
void	Configure (const Registry &config)
void	Configure (std::string config)
Public Member Functions inherited from genie::XSecIntegratorI
virtual	~XSecIntegratorI ()
Public Member Functions inherited from genie::Algorithm
virtual	~Algorithm ()
virtual void	Configure (string config)
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)

Private Attributes
double	fTMax
	upper bound for t = (q - p_pi)^2 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)
static string	BuildParamMatKey (const std::string &comm_name, unsigned int i, unsigned int j)
static string	BuildParamMatRowSizeKey (const std::string &comm_name)
static string	BuildParamMatColSizeKey (const std::string &comm_name)
Protected Member Functions inherited from genie::XSecIntegratorI
	XSecIntegratorI ()
	XSecIntegratorI (string name)
	XSecIntegratorI (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
template<class T >
int	GetParamMat (const std::string &comm_name, TMatrixT< T > &mat, bool is_top_call=true) const
	Handle to load matrix of parameters. More...
template<class T >
int	GetParamMatSym (const std::string &comm_name, TMatrixTSym< T > &mat, bool is_top_call=true) const
int	GetParamMatKeys (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::XSecIntegratorI
const IntegratorI *	fIntegrator
	GENIE numerical integrator. More...
string	fGSLIntgType
	name of GSL numerical integrator More...
double	fGSLRelTol
	required relative tolerance (error) More...
int	fGSLMaxEval
	GSL max evaluations. More...
int	fGSLMinEval
	GSL min evaluations. Ignored by some integrators. More...
unsigned int	fGSLMaxSizeOfSubintervals
	GSL maximum number of sub-intervals for 1D integrator. More...
unsigned int	fGSLRule
	GSL Gauss-Kronrod integration rule (only for GSL 1D adaptive type) 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

Computes the cross section for DFR neutrino-nucleus pi production.
Is a concrete implementation of the XSecIntegratorI interface.

Author

Jeremy Wolcott <jeremy.wolcott tufts.edu> Tufts University

Created:

May 13, 2016

License:

Copyright (c) 2003-2024, The GENIE Collaboration For the full text of the license visit http://copyright.genie-mc.org

Definition at line 36 of file DFRXSec.h.

Constructor & Destructor Documentation

DFRXSec::DFRXSec

(

)

Definition at line 37 of file DFRXSec.cxx.

 : XSecIntegratorI("genie::DFRXSec")
{

}

DFRXSec::DFRXSec

(

std::string

config

)

Definition at line 44 of file DFRXSec.cxx.

 : XSecIntegratorI("genie::DFRXSec", config)
{

}

DFRXSec::~DFRXSec ( )

virtual

Definition at line 51 of file DFRXSec.cxx.

{

}

Member Function Documentation

void DFRXSec::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 108 of file DFRXSec.cxx.

References genie::Algorithm::Configure(), and LoadConfig().

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

void DFRXSec::Configure

(

std::string

config

)

Definition at line 115 of file DFRXSec.cxx.

References genie::Algorithm::Configure(), and LoadConfig().

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

double DFRXSec::Integrate ( const XSecAlgorithmI *  model, const Interaction *  i  ) const

virtual

Implements genie::XSecIntegratorI.

Definition at line 57 of file DFRXSec.cxx.

References genie::units::cm2, genie::XSecIntegratorI::fGSLIntgType, genie::XSecIntegratorI::fGSLMaxEval, genie::XSecIntegratorI::fGSLMinEval, genie::XSecIntegratorI::fGSLRelTol, fTMax, func(), genie::utils::gsl::IntegrationNDimTypeFromString(), genie::KPhaseSpace::IsAboveThreshold(), genie::controls::kASmallNum, genie::kISkipProcessChk, genie::kKVx, genie::kKVy, genie::KPhaseSpace::Limits(), LOG, genie::Range1D_t::max, genie::Range1D_t::min, pDEBUG, genie::Interaction::PhaseSpace(), pINFO, and genie::XSecAlgorithmI::ValidProcess().

{
  if(! model->ValidProcess(in) ) return 0.;

  const KPhaseSpace & kps = in->PhaseSpace();
  if(!kps.IsAboveThreshold()) {
     LOG("DFRXSec", pDEBUG)  << "*** Below energy threshold";
     return 0;
  }
  Range1D_t xl = kps.Limits(kKVx);
  Range1D_t yl = kps.Limits(kKVy);
  // the actual t lower limit depends on Q^2 and nu, or, equivalently, x and y.
  // defer to KPhaseSpace::IsAlllowed() on where to start the t integral.
  Range1D_t tl;
  tl.min = controls::kASmallNum;
  tl.max = fTMax;

  Interaction * interaction = new Interaction(*in);
  interaction->SetBit(kISkipProcessChk);   // todo: was enabled in COH model.  do I need it here?
  //interaction->SetBit(kISkipKinematicChk);

  double xsec = 0.0;
  LOG("DFRXSec", pINFO)
    << "x integration range = [" << xl.min << ", " << xl.max << "]";
  LOG("DFRXSec", pINFO)
    << "y integration range = [" << yl.min << ", " << yl.max << "]";
  LOG("DFRXSec", pINFO)
    << "t integration range = [" << tl.min << ", " << tl.max << "]";

  ROOT::Math::IBaseFunctionMultiDim * func =
    new utils::gsl::d3XSec_dxdydt_E(model, interaction);
  ROOT::Math::IntegrationMultiDim::Type ig_type =
    utils::gsl::IntegrationNDimTypeFromString(fGSLIntgType);

  double abstol = 1; //We mostly care about relative tolerance.
  ROOT::Math::IntegratorMultiDim ig(*func, ig_type, abstol, fGSLRelTol, fGSLMaxEval);
  if (ig_type == ROOT::Math::IntegrationMultiDim::kADAPTIVE) {
    ROOT::Math::AdaptiveIntegratorMultiDim * cast =
      dynamic_cast<ROOT::Math::AdaptiveIntegratorMultiDim*>( ig.GetIntegrator() );
    assert(cast);
    cast->SetMinPts(fGSLMinEval);
  }

  double kine_min[3] = { xl.min, yl.min, tl.min };
  double kine_max[3] = { xl.max, yl.max, tl.max };
  xsec = ig.Integral(kine_min, kine_max) * (1E-38 * units::cm2);
  delete func;
  return xsec;
}

void DFRXSec::LoadConfig ( void  )

private

Definition at line 122 of file DFRXSec.cxx.

References genie::XSecIntegratorI::fGSLIntgType, genie::XSecIntegratorI::fGSLMaxEval, genie::XSecIntegratorI::fGSLMinEval, genie::XSecIntegratorI::fGSLRelTol, fTMax, genie::Algorithm::GetParam(), and genie::Algorithm::GetParamDef().

Referenced by Configure().

{
  // Get GSL integration type & relative tolerance
  GetParamDef( "gsl-integration-type", fGSLIntgType, string("adaptive") ) ;
  GetParamDef( "gsl-relative-tolerance", fGSLRelTol, 1E-2 ) ;

  int max, min;
  GetParamDef( "gsl-max-eval", max, 500000 ) ;
  GetParamDef( "gsl-min-eval", min, 5000 ) ;
  fGSLMaxEval  = (unsigned int) max ;
  fGSLMinEval  = (unsigned int) min ;

  //-- DFR model parameter t_max for t = (q - p_pi)^2
  GetParam( "DFR-t-max", fTMax ) ;

}

Member Data Documentation

double genie::DFRXSec::fTMax

private

upper bound for t = (q - p_pi)^2

Definition at line 54 of file DFRXSec.h.

Referenced by Integrate(), and LoadConfig().

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

• DFRXSec.h
• DFRXSec.cxx