EvtVectorIsr.hh

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#ifndef EVTVECTORISR_HH
#define EVTVECTORISR_HH
 
#include "EvtGenBase/EvtDecayIncoherent.hh"
 
class EvtParticle;
 
// Description:
//   This is a special decay model to generate e+e- -> phi gamma + soft gammas
//   using soft collinear ISR calculation from AfkQed
//   This is implemented as a decay of the VPHO.
 
class EvtVectorIsr : public EvtDecayIncoherent {
  public:
    std::string getName() const override;
 
    EvtDecayBase* clone() const override;
 
    void decay( EvtParticle* p ) override;
 
    void init() override;
 
    void initProbMax() override;
 
    double ckhrad1( double xx, double a, double b );
 
    void ckhrad( const double& e_beam, const double& q2_min, double& e01,
                 double& e02, double& f );
 
  private:
    double m_csfrmn, m_csbkmn;
    double m_fmax;
    bool m_firstorder;
};
 
#endif