NonrelativisticBW.cc

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#include "CLHEP/GenericFunctions/NonrelativisticBW.hh"
#include "CLHEP/GenericFunctions/Variable.hh"
#include <assert.h>
#include <cmath>
#include <iostream>
 
#if (defined __STRICT_ANSI__) || (defined _WIN32)
#ifndef M_PI
#define M_PI            3.14159265358979323846
#endif // M_PI
#endif // __STRICT_ANSI__
 
using namespace std;
 
namespace Genfun {
FUNCTION_OBJECT_IMP(NonrelativisticBWDistribution)
 
 
NonrelativisticBWDistribution::NonrelativisticBWDistribution():
  _mass("mass",    50, 10, 90),
  _width ("width", 5, 0,   100)
{}
 
  NonrelativisticBWDistribution::NonrelativisticBWDistribution(const NonrelativisticBWDistribution & right):
    AbsFunction(),
    _mass(right._mass),
    _width (right._width)
{
}
 
NonrelativisticBWDistribution::~NonrelativisticBWDistribution() {
}
 
double NonrelativisticBWDistribution::operator() (double x) const {
  double M=_mass.getValue();
  double G=_width.getValue()/2.0;
  double f = (1.0/M_PI)*G/((x-M)*(x-M) +G*G);
  return f;
 
}
 
Parameter & NonrelativisticBWDistribution::mass() {
  return _mass;
}
 
 
Parameter & NonrelativisticBWDistribution::width() {
  return _width;
}
 
 
} // namespace Genfun