QPMDISPXSec.h

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//____________________________________________________________________________
/*!
 
\class    genie::QPMDISPXSec
 
\brief    Computes DIS differential cross sections.
          Is a concrete implementation of the XSecAlgorithmI interface.
 
\ref      E.A.Paschos and J.Y.Yu, Phys.Rev.D 65.03300
 
\author   Costas Andreopoulos <c.andreopoulos \at cern.ch>
          University of Liverpool
 
\created  May 05, 2004
 
\cpright  Copyright (c) 2003-2025, The GENIE Collaboration
          For the full text of the license visit http://copyright.genie-mc.org          
*/
//____________________________________________________________________________
 
#ifndef _DIS_PARTON_MODEL_PARTIAL_XSEC_H_
#define _DIS_PARTON_MODEL_PARTIAL_XSEC_H_
 
#include "Framework/EventGen/XSecAlgorithmI.h"
#include "Physics/DeepInelastic/XSection/DISStructureFunc.h"
 
namespace genie {
 
class DISStructureFuncModelI;
class HadronizationModelI;
class XSecIntegratorI;
 
class QPMDISPXSec : public XSecAlgorithmI {
 
public:
  QPMDISPXSec();
  QPMDISPXSec(string config);
  virtual ~QPMDISPXSec();
 
  // XSecAlgorithmI interface implementation
  double XSec            (const Interaction * i, KinePhaseSpace_t k) const;
  double Integral        (const Interaction * i) const;
  bool   ValidProcess    (const Interaction * i) const;
 
  // overload the Algorithm::Configure() methods to load private data
  // members from configuration options
  void Configure(const Registry & config);
  void Configure(string config);
 
private:
  void   LoadConfig                  (void);
 
  mutable DISStructureFunc fDISSF;
  bool                     fInInitPhase;
 
  const DISStructureFuncModelI * fDISSFModel;         ///< SF model
  const XSecIntegratorI *        fXSecIntegrator;     ///< diff. xsec integrator
 
  const XSecAlgorithmI * fCharmProdModel;
 
  double fCCScale;            ///< cross section scaling factor
  double fNCScale;            ///< cross section scaling factor
  double fEMScale;            ///< cross section scaling factor
  double fSin48w;           ///< sin^4(Weingberg angle)
};
 
}       // genie namespace
#endif  // _DIS_PARTON_MODEL_PARTIAL_XSEC_H_