funct::BreitWigner Struct Reference

#include <BreitWigner.h>

List of all members.

Public Member Functions
	BreitWigner (const Parameter &m, const Parameter &g)
	BreitWigner (boost::shared_ptr< double > m, boost::shared_ptr< double > g)
	BreitWigner (double m, double g)
double	operator() (double x) const
Public Attributes
boost::shared_ptr< double >	mass
boost::shared_ptr< double >	width

---

Detailed Description

Definition at line 10 of file BreitWigner.h.

---

Constructor & Destructor Documentation

funct::BreitWigner::BreitWigner	(	const Parameter &	m,
		const Parameter &	g
	)		[inline]

Definition at line 11 of file BreitWigner.h.

                                                       :
      mass(m.ptr()), width(g.ptr()) { }

funct::BreitWigner::BreitWigner	(	boost::shared_ptr< double >	m,
		boost::shared_ptr< double >	g
	)		[inline]

Definition at line 13 of file BreitWigner.h.

                                                                     : 
      mass(m), width(g) {}

funct::BreitWigner::BreitWigner	(	double	m,
		double	g
	)		[inline]

Definition at line 15 of file BreitWigner.h.

                                   : 
      mass(new double(m)), width(new double(g)) {}

---

Member Function Documentation

double funct::BreitWigner::operator()

(

double

x

)

const [inline]

Definition at line 17 of file BreitWigner.h.

References mass, asciidump::s, funct::twoOverPi, width, and x.

                                      {
      double m2 = *mass * (*mass); 
      double g2 = *width * (*width);
      double g2OverM2 = g2/m2;
      double s = x*x;
      double deltaS = s - m2;
      double lineShape = 0;
      if (fabs(deltaS/m2)<16) {
        double prop = deltaS*deltaS + s*s*g2OverM2;
        lineShape = twoOverPi * (*width) * s/prop;
      }
      return lineShape;
    }

---

Member Data Documentation

boost::shared_ptr<double> funct::BreitWigner::mass

Definition at line 30 of file BreitWigner.h.

Referenced by operator()().

boost::shared_ptr<double> funct::BreitWigner::width

Definition at line 30 of file BreitWigner.h.

Referenced by operator()().