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:

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. 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...

Protected Attributes
bool	fSplitIntegral

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...

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)

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

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...

Detailed Description

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

Author: Costas Andreopoulos <constantinos.andreopoulos cern.ch> STFC, Rutherford Appleton Laboratory

May 04, 2004

Definition at line 26 of file COHXSecAR.h.

Constructor & Destructor Documentation

COHXSecAR::COHXSecAR ( )

Definition at line 35 of file COHXSecAR.cxx.

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

COHXSecAR::COHXSecAR ( string config )

Definition at line 41 of file COHXSecAR.cxx.

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

COHXSecAR::~COHXSecAR ( )

virtual

Definition at line 47 of file COHXSecAR.cxx.

 {
 
 }

Member Function Documentation

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();
 }

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();
 }

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;
 }

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 ) ;
 
 }

Member Data Documentation

bool genie::COHXSecAR::fSplitIntegral

protected

Definition at line 41 of file COHXSecAR.h.

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

Generator/src/Physics/Coherent/XSection/COHXSecAR.h
Generator/src/Physics/Coherent/XSection/COHXSecAR.cxx

Public Member Functions

Protected Attributes

Private Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation