EvtPropagator.hh

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/*******************************************************************************
 * Project: BaBar detector at the SLAC PEP-II B-factory
 * Package: EvtGenBase
 *    File: $Id: EvtPropagator.hh,v 1.1.1.2 2007/10/26 05:03:14 pingrg Exp $
 *  Author: Alexei Dvoretskii, dvoretsk@slac.stanford.edu, 2001-2002
 *
 * Copyright (C) 2002 Caltech
 *******************************************************************************/
 
// Defines propagator as a function of mass and width
 
#ifndef EVT_PROPAGATOR_HH
#define EVT_PROPAGATOR_HH
 
#include "EvtAmplitude.hh"
#include "EvtComplex.hh"
#include "EvtPoint1D.hh"
#include <assert.h>
 
class EvtPropagator : public EvtAmplitude<EvtPoint1D> {
public:
  EvtPropagator( double m0, double g0 ) : _m0( m0 ), _g0( g0 ) {
    assert( m0 > 0 );
    assert( g0 >= 0 );
  }
  EvtPropagator( const EvtPropagator& other ) : _m0( other._m0 ), _g0( other._g0 ) {}
  virtual ~EvtPropagator() {}
 
  // Accessors
 
  inline double m0() const { return _m0; }
  inline double g0() const { return _g0; }
 
  // Modifiers (can be useful e.g. for fitting!)
 
  inline void set_m0( double m0 ) {
    assert( m0 > 0 );
    _m0 = m0;
  }
  inline void set_g0( double g0 ) {
    assert( g0 >= 0 );
    _g0 = g0;
  }
 
protected:
  double _m0;
  double _g0;
};
 
#endif