genie::PhotonStrucFunc Class Reference

Structure function using photon PDFs of nucleons. More...

#include <PhotonStrucFunc.h>

Collaboration diagram for genie::PhotonStrucFunc:

Classes
struct	Cleaner
class	PhotonStrucFuncTable

Public Member Functions
double	EvalSF (int hitnuc, int hitlep, double x)

Static Public Member Functions
static PhotonStrucFunc *	Instance (void)

Private Member Functions
	PhotonStrucFunc ()
	PhotonStrucFunc (const PhotonStrucFunc &)
	~PhotonStrucFunc ()

Private Attributes
map< int, PhotonStrucFuncTable >	fSFTables

Static Private Attributes
static PhotonStrucFunc *	fgInstance = 0

Friends
struct	Cleaner

Detailed Description

Structure function using photon PDFs of nucleons.

Author

Alfonso Garcia <aagarciasoto \at km3net.de> IFIC & Harvard University

Created:\n Dec 8, 2021

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

For the full text of the license visit http://copyright.genie-mc.org or see $GENIE/LICENSE

Definition at line 36 of file PhotonStrucFunc.h.

Constructor & Destructor Documentation

PhotonStrucFunc() [1/2]

PhotonStrucFunc::PhotonStrucFunc ( )

private

Definition at line 22 of file PhotonStrucFunc.cxx.

{
 
  string basedir = "";
  if ( gSystem->Getenv("PHOTON_SF_DATA_PATH")==NULL ) basedir = string(gSystem->Getenv("GENIE")) + "/data/evgen/photon-sf";
  else                                                basedir = string(gSystem->Getenv("PHOTON_SF_DATA_PATH"));
  LOG("PhotonStrucFunc", pWARN) << "Base diretory: " << basedir;
 
  int nucs[2] = { kPdgProton, kPdgNeutron };
  int pdgs[6] = { kPdgNuE, kPdgAntiNuE, kPdgNuMu, kPdgAntiNuMu, kPdgNuTau, kPdgAntiNuTau };
  
  for (int k=0; k<2; k++) {
    for(int j=0; j<6; j++) {
      string SFname = basedir + "/PhotonSF_hitnuc"+std::to_string(nucs[k])+"_hitlep"+std::to_string(pdgs[j])+".dat";
      if ( gSystem->AccessPathName( SFname.c_str(), kReadPermission ) ) {
        LOG("PhotonStrucFunc", pFATAL) << "File doesnt exist or you dont have read permission.";        
        LOG("PhotonStrucFunc", pFATAL) << "Remember!!!";
        LOG("PhotonStrucFunc", pFATAL) << "Path to base directory is defined with the enviroment variable PHOTON_SF_DATA_PATH.";
        LOG("PhotonStrucFunc", pFATAL) << "If not defined, default location is $GENIE/data/evgen/photon-sf";
        LOG("PhotonStrucFunc", pFATAL) << "Photon SF tables must be computed with gmkglressf.";        
        assert(0);
      }
      fSFTables[nucs[k]].Table[pdgs[j]] = new genie::Spline();
      fSFTables[nucs[k]].Table[pdgs[j]]->LoadFromAsciiFile(SFname);
    }        
  }
 
  fgInstance = 0;
 
}

References fgInstance, fSFTables, genie::kPdgAntiNuE, genie::kPdgAntiNuMu, genie::kPdgAntiNuTau, genie::kPdgNeutron, genie::kPdgNuE, genie::kPdgNuMu, genie::kPdgNuTau, genie::kPdgProton, LOG, pFATAL, and pWARN.

Referenced by Instance(), and PhotonStrucFunc().

PhotonStrucFunc() [2/2]

genie::PhotonStrucFunc::PhotonStrucFunc ( const PhotonStrucFunc & )

private

References PhotonStrucFunc().

~PhotonStrucFunc()

PhotonStrucFunc::~PhotonStrucFunc ( )

private

Definition at line 53 of file PhotonStrucFunc.cxx.

{
 
}

Member Function Documentation

EvalSF()

double genie::PhotonStrucFunc::EvalSF ( int hitnuc, int hitlep, double x )

inline

Definition at line 56 of file PhotonStrucFunc.h.

{ return fSFTables[hitnuc].Table[hitlep]->Evaluate(x); }

References fSFTables.

Referenced by genie::PhotonRESPXSec::XSec().

Instance()

PhotonStrucFunc * PhotonStrucFunc::Instance ( void )

static

Definition at line 58 of file PhotonStrucFunc.cxx.

{
  if(fgInstance == 0) {
    LOG("PhotonStrucFunc", pINFO) << "Late initialization";
    static PhotonStrucFunc::Cleaner cleaner;
    cleaner.DummyMethodAndSilentCompiler();
    fgInstance = new PhotonStrucFunc();
  }  
  return fgInstance;
}

References genie::PhotonStrucFunc::Cleaner::DummyMethodAndSilentCompiler(), fgInstance, LOG, PhotonStrucFunc(), and pINFO.

Referenced by genie::PhotonRESPXSec::XSec().

Friends And Related Symbol Documentation

Cleaner

friend struct Cleaner

friend

Definition at line 82 of file PhotonStrucFunc.h.

Member Data Documentation

fgInstance

PhotonStrucFunc * PhotonStrucFunc::fgInstance = 0

staticprivate

Definition at line 66 of file PhotonStrucFunc.h.

Referenced by Instance(), PhotonStrucFunc(), and genie::PhotonStrucFunc::Cleaner::~Cleaner().

fSFTables

map<int, PhotonStrucFuncTable> genie::PhotonStrucFunc::fSFTables

private

Definition at line 69 of file PhotonStrucFunc.h.

Referenced by EvalSF(), and PhotonStrucFunc().

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

• PhotonStrucFunc.h
• PhotonStrucFunc.cxx