GTruth.h

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#ifndef SIMB_GTRUTH_H
#define SIMB_GTRUTH_H

#include <iostream>
#include <TLorentzVector.h>

namespace simb {

  class GTruth {

  public:
    GTruth();

    // Interactions info
    int            fGint;         
    int            fGscatter;     
    int            fGPhaseSpace;  

    // Event info
    double         fweight;       
    double         fprobability;  
    double         fXsec;         
    double         fDiffXsec;     

    // genie::XclsTag info
    int            fNumPiPlus;    
    int            fNumPiMinus;   
    int            fNumPi0;       
    int            fNumProton;    
    int            fNumNeutron;   
    bool           fIsCharm;      
    int            fResNum;       

    // Kinematics info
    double         fgQ2;
    double         fgq2;
    double         fgW;
    double         fgT;
    double         fgX;
    double         fgY;
    TLorentzVector fFShadSystP4;

    // Target info
    bool           fIsSeaQuark;
    TLorentzVector fHitNucP4;
    int            ftgtZ;
    int            ftgtA;
    int            ftgtPDG;       

    // Initial State info
    int            fProbePDG;
    TLorentzVector fProbeP4;
    TLorentzVector fVertex;

    // Flag for values that might not have been set
    static constexpr double kUndefinedValue = -99999;

  public:
    friend std::ostream& operator<< (std::ostream& output, const simb::GTruth &gtruth);

  };

} // end simb namespace

#endif // SIMB_GTRUTH_H