genie::COHXSecAR Class Reference

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

#include <COHXSecAR.h>

Inheritance diagram for genie::COHXSecAR:

Collaboration diagram for genie::COHXSecAR:

Public Member Functions
	COHXSecAR ()
	COHXSecAR (string config)
virtual	~COHXSecAR ()
double	Integrate (const XSecAlgorithmI *model, const Interaction *i) const
void	Configure (const Registry &config)
void	Configure (string config)
Public Member Functions inherited from genie::XSecIntegratorI
virtual	~XSecIntegratorI ()
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.
virtual AlgStatus_t	GetStatus (void) const
	Get algorithm status.
virtual bool	AllowReconfig (void) const
virtual AlgCmp_t	Compare (const Algorithm *alg) const
	Compare with input algorithm.
virtual void	SetId (const AlgId &id)
	Set algorithm ID.
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.

Protected Attributes
bool	fSplitIntegral
Protected Attributes inherited from genie::XSecIntegratorI
const IntegratorI *	fIntegrator
	GENIE numerical integrator.
string	fGSLIntgType
	name of GSL numerical integrator
double	fGSLRelTol
	required relative tolerance (error)
int	fGSLMaxEval
	GSL max evaluations.
int	fGSLMinEval
	GSL min evaluations. Ignored by some integrators.
unsigned int	fGSLMaxSizeOfSubintervals
	GSL maximum number of sub-intervals for 1D integrator.
unsigned int	fGSLRule
	GSL Gauss-Kronrod integration rule (only for GSL 1D adaptive type)
Protected Attributes inherited from genie::Algorithm
bool	fAllowReconfig
bool	fOwnsSubstruc
	true if it owns its substructure (sub-algs,...)
AlgId	fID
	algorithm name and configuration set
vector< Registry * >	fConfVect
vector< bool >	fOwnerships
	ownership for every registry in fConfVect
AlgStatus_t	fStatus
	algorithm execution status
AlgMap *	fOwnedSubAlgMp
	local pool for owned sub-algs (taken out of the factory pool)

Private Member Functions
void	LoadConfig (void)

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.
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.
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.
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
int	AddLowRegistry (Registry *rp, bool owns=true)
	add registry with lowest priority, also update ownership
int	MergeTopRegistry (const Registry &r)
int	AddTopRegisties (const vector< Registry * > &rs, bool owns=false)
	Add registries with top priority, also udated Ownerships.

Detailed Description

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

Author

Costas Andreopoulos <c.andreopoulos \at cern.ch> University of Liverpool

Created:\n May 04, 2004

License:\n Copyright (c) 2003-2025, The GENIE Collaboration

For the full text of the license visit http://copyright.genie-mc.org

Definition at line 26 of file COHXSecAR.h.

Constructor & Destructor Documentation

COHXSecAR() [1/2]

COHXSecAR::COHXSecAR

(

)

Definition at line 35 of file COHXSecAR.cxx.

                     :
XSecIntegratorI("genie::COHXSecAR")
{
 
}

References genie::XSecIntegratorI::XSecIntegratorI().

COHXSecAR() [2/2]

COHXSecAR::COHXSecAR

(

string

config

)

Definition at line 41 of file COHXSecAR.cxx.

                                  :
XSecIntegratorI("genie::COHXSecAR", config)
{
 
}

References genie::XSecIntegratorI::XSecIntegratorI().

~COHXSecAR()

COHXSecAR::~COHXSecAR ( )

virtual

Definition at line 47 of file COHXSecAR.cxx.

{
 
}

Member Function Documentation

Configure() [1/2]

void COHXSecAR::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 126 of file COHXSecAR.cxx.

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

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

Configure() [2/2]

void COHXSecAR::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 132 of file COHXSecAR.cxx.

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

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

Integrate()

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

virtual

Implements genie::XSecIntegratorI.

Definition at line 52 of file COHXSecAR.cxx.

{
  const InitialState & init_state = in -> InitState();
 
  if(! model->ValidProcess(in) ) return 0.;
 
  const KPhaseSpace & kps = in->PhaseSpace();
  if(!kps.IsAboveThreshold()) {
     LOG("COHXSecAR", pDEBUG)  << "*** Below energy threshold";
     return 0;
  }
 
  Range1D_t y_lim = kps.Limits(kKVy);
 
  // Check this
  double Enu      = init_state.ProbeE(kRfLab);
  double Elep_min = (1.-y_lim.max) * Enu;
  double Elep_max = (1.-y_lim.min) * Enu;
 
  LOG("COHXSecAR", pINFO)
       << "Lepton energy integration range = [" << Elep_min << ", " << Elep_max << "]";
 
  Interaction * interaction = new Interaction(*in);
  interaction->SetBit(kISkipProcessChk);
  //interaction->SetBit(kISkipKinematicChk);
 
  double xsec = 0;
  if (fSplitIntegral) {
    utils::gsl::dXSec_dElep_AR * func =
      new utils::gsl::dXSec_dElep_AR(model, interaction, fGSLIntgType, fGSLRelTol, fGSLMaxEval);
 
    //~ ROOT::Math::IntegrationOneDim::Type ig_type = ROOT::Math::IntegrationOneDim::kNONADAPTIVE;
    ROOT::Math::IntegrationOneDim::Type ig_type = ROOT::Math::IntegrationOneDim::kADAPTIVE;
 
    double abstol = 1; // Pretty sure this parameter is unused by ROOT.
    int size = 1000;  // Max number of subintervals, won't reach nearly this.
    int rule = 2; // See https://www.gnu.org/software/gsl/manual/gsl-ref_17.html#SEC283
                  // Rule 2 is 21 points min
    ROOT::Math::Integrator ig(*func,ig_type,abstol,fGSLRelTol,size,rule);
 
    xsec = ig.Integral(Elep_min, Elep_max) * (1E-38 * units::cm2);
    delete func;
  }
  else {
    double zero    = kASmallNum;
    double pi      = kPi-kASmallNum ;
    double twopi   = 2*kPi-kASmallNum ;
 
    //~ ROOT::Math::IBaseFunctionMultiDim * func =
          //~ new utils::gsl::wrap::d5Xsec_dEldOmegaldOmegapi(model, interaction);
    //~ double kine_min[5] = { Elep_min, zero , zero    , zero, zero };
    //~ double kine_max[5] = { Elep_max, pi   , twopi   , pi  , twopi};
 
    ROOT::Math::IBaseFunctionMultiDim * func =
          new utils::gsl::d4Xsec_dEldThetaldOmegapi(model, interaction);
    double kine_min[4] = { Elep_min, zero , zero    , zero    };
    double kine_max[4] = { Elep_max, pi   , pi      , twopi   };
 
    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);
 
    xsec = ig.Integral(kine_min, kine_max) * (1E-38 * units::cm2);
    delete func;
  }
 
  delete interaction;
 
  return xsec;
}

References genie::units::cm2, genie::XSecIntegratorI::fGSLIntgType, genie::XSecIntegratorI::fGSLMaxEval, genie::XSecIntegratorI::fGSLRelTol, fSplitIntegral, func(), genie::utils::gsl::IntegrationNDimTypeFromString(), genie::KPhaseSpace::IsAboveThreshold(), genie::controls::kASmallNum, genie::kISkipProcessChk, genie::kKVy, genie::constants::kPi, genie::kRfLab, genie::KPhaseSpace::Limits(), LOG, genie::Range1D_t::max, genie::Range1D_t::min, pDEBUG, genie::Interaction::PhaseSpace(), pINFO, genie::InitialState::ProbeE(), and genie::XSecAlgorithmI::ValidProcess().

LoadConfig()

void COHXSecAR::LoadConfig ( void )

private

Definition at line 138 of file COHXSecAR.cxx.

{
  // Get GSL integration type & relative tolerance
  GetParamDef( "gsl-integration-type", fGSLIntgType, string("vegas") ) ;
 
  int max_eval;
  GetParamDef( "gsl-max-eval", max_eval, 4000 ) ;
  fGSLMaxEval    = (unsigned int) max_eval ;
 
  GetParamDef( "gsl-relative-tolerance", fGSLRelTol,  0.01) ;
  GetParamDef( "split-integral", fSplitIntegral, true ) ;
 
}

References genie::XSecIntegratorI::fGSLIntgType, genie::XSecIntegratorI::fGSLMaxEval, genie::XSecIntegratorI::fGSLRelTol, fSplitIntegral, and genie::Algorithm::GetParamDef().

Referenced by Configure(), and Configure().

Member Data Documentation

fSplitIntegral

bool genie::COHXSecAR::fSplitIntegral

protected

Definition at line 41 of file COHXSecAR.h.

Referenced by Integrate(), and LoadConfig().

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

• COHXSecAR.h
• COHXSecAR.cxx