AhrensNCELPXSec.h

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//____________________________________________________________________________
/*!
 
\class    genie::AhrensNCELPXSec
 
\brief    Differential cross section for v+N / vbar+N elastic scattering. \n
          Is a concrete implementation of the XSecAlgorithmI interface. \n
 
\ref      R.E.Hendrick and L.Li, Phys.Rev.D 19:779 (1979)
          L.A.Ahrens et al., Phys.Rev.D 35:785 (1987)
 
\author   Costas Andreopoulos <c.andreopoulos \at cern.ch>
          University of Liverpool
 
\created  Fabruary 15, 2005
 
\cpright  Copyright (c) 2003-2025, The GENIE Collaboration
          For the full text of the license visit http://copyright.genie-mc.org
          
*/
//____________________________________________________________________________
 
#ifndef _AHRENS_NCEL_CROSS_SECTION_H_
#define _AHRENS_NCEL_CROSS_SECTION_H_
 
#include "Framework/EventGen/XSecAlgorithmI.h"
 
namespace genie {
 
class XSecIntegratorI;
 
class AhrensNCELPXSec : public XSecAlgorithmI {
 
public:
  AhrensNCELPXSec();
  AhrensNCELPXSec(string config);
  virtual ~AhrensNCELPXSec();
 
  // XSecAlgorithmI interface implementation
  double XSec            (const Interaction * i, KinePhaseSpace_t k) const;
  double Integral        (const Interaction * i) const;
  bool   ValidProcess    (const Interaction * i) const;
 
  // Override the Algorithm::Configure methods to load configuration
  // data to private data members
  void Configure (const Registry & config);
  void Configure (string param_set);
 
private:
  void LoadConfig(void);
 
  const XSecIntegratorI * fXSecIntegrator;
 
  double fkAlpha;
  double fkGamma; 
  double fEta;
  double fFa0;
  double fMa2;
  double fMv2;
  double fMuP;
  double fMuN;
};
 
}       // genie namespace
 
#endif