SimplePhotonFitObject.h

 
#ifndef __SIMPLEPHOTONFITOBJECT_H
#define __SIMPLEPHOTONFITOBJECT_H

#include "ParticleFitObject.h"

// Class SimplePhotonFitObject

class SimplePhotonFitObject : public ParticleFitObject {
  public:
    SimplePhotonFitObject(double px, double py, double pz,   
                 double Dpz);                          
                 
    SimplePhotonFitObject (const SimplePhotonFitObject& rhs              
                   );
    
    virtual SimplePhotonFitObject *copy() const;
    
    virtual SimplePhotonFitObject& assign (const BaseFitObject& source   
                                 );
    
    SimplePhotonFitObject& operator= (const SimplePhotonFitObject& rhs   
                             );

    virtual ~SimplePhotonFitObject();
    
    virtual const char *getParamName (int ilocal     
                                     ) const;

    virtual bool   updateParams (double p[],   
                                 int idim      
                                );  
    
    
    // these depend on actual parametrisation!     
    virtual double getDPx(int ilocal) const;
    virtual double getDPy(int ilocal) const;
    virtual double getDPz(int ilocal) const;
    virtual double getDE(int ilocal) const;

    virtual double getFirstDerivative_Meta_Local( int iMeta, int ilocal , int metaSet ) const;
    virtual double getSecondDerivative_Meta_Local( int iMeta, int ilocal , int jlocal , int metaSet ) const;

    virtual int getNPar() const {return NPAR;}
  
  protected:
    
    void updateCache() const;
    
    mutable double pt2, p2, p,
                   dE0, dE1, dE2, 
                   chi2;

    enum {NPAR=3};

};



#endif // __SIMPLEPHOTONFITOBJECT_H