PBreitWigner.h

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// Author: Kagarlis
// Written: 23.5.2007
// Revised: I. Froehlich (from PData)
 
#ifndef _PBREITWIGNER_H_
#define _PBREITWIGNER_H_
 
#include "TF1.h"
#include "TF2.h"
#include "PHadronModel.h"
 
class PBreitWigner : public PHadronModel  {
 
 public:
    PBreitWigner();
    PBreitWigner(const Char_t *id, const Char_t *de, Int_t key);
    PDistribution* Clone(const char *delme=NULL) const;
 
    using PDistribution::GetWeight;
    virtual Double_t GetWeight(Double_t *mass, Int_t *didx=NULL);
    using PDistribution::SampleMass;
    Bool_t SampleMass(Double_t *mass, Int_t *didx=NULL);
 
    void SetWidthModel(PChannelModel *m) {
    //overwrites the partial model from the data base
    width_model = m;
    };
 
 protected:
 
    Double_t mr; // Resonance pole mass
    PChannelModel *width_model;
 
    ClassDef(PBreitWigner,0)  // Breit Wigner with mass-dependent width
};
 
#endif