EvtPFermi.hh

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#ifndef EVTPFERMI_HH
#define EVTPFERMI_HH
 
// Description:
//   DFN model:
//      F(k+) = N (1-x)^a exp((1+a)x) ,x=k+/(mB-mb)
//      the fermi motion distribution according to
//      hep-ph/9905351 v2
//   BLNP model:
//      F(what,Lambda,b) = pow(b,b)/(tgamma(b)*Lambda)*pow(what/Lambda,b-1)*
//                           exp(-b*what/Lambda);
//      the leading order shape function (exp) (hep-ph/0504071)
 
class EvtPFermi final {
  public:
    // Constructors
 
    EvtPFermi( const double& a, const double& mB, const double& mb );
    EvtPFermi( const double& Lambda, const double& b );
 
    // Operators
 
    // Selectors
 
    // Modifiers
 
    // Methods
 
    double getFPFermi( const double& kplus );
    double getSFBLNP( const double& what );
 
  protected:
    // Helper functions
 
  private:
    // Friends
 
    // Data members
 
    double m_a;
    double m_mb;
    double m_mB;
    double m_Lambda;
    double m_b;
};
 
#endif    // EVTPFERMI_HH