funct::BreitWigner Struct Reference

#include <BreitWigner.h>

Public Member Functions
	BreitWigner (const Parameter &m, const Parameter &g)
	BreitWigner (std::shared_ptr< double > m, std::shared_ptr< double > g)
	BreitWigner (double m, double g)
double	operator() (double x) const

Public Attributes
std::shared_ptr< double >	mass
std::shared_ptr< double >	width

Detailed Description

Definition at line 10 of file BreitWigner.h.

Constructor & Destructor Documentation

BreitWigner() [1/3]

funct::BreitWigner::BreitWigner ( const Parameter &  m, const Parameter &  g  )

inline

Definition at line 11 of file BreitWigner.h.

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

BreitWigner() [2/3]

funct::BreitWigner::BreitWigner ( std::shared_ptr< double >  m, std::shared_ptr< double >  g  )

inline

Definition at line 12 of file BreitWigner.h.

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

BreitWigner() [3/3]

funct::BreitWigner::BreitWigner ( double  m, double  g  )

inline

Definition at line 13 of file BreitWigner.h.

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

Member Function Documentation

operator()()

double funct::BreitWigner::operator() ( double  x ) const

inline

Definition at line 14 of file BreitWigner.h.

References diffTwoXMLs::g2, callgraph::m2, mass, alignCSCRings::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

mass

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

Definition at line 27 of file BreitWigner.h.

Referenced by Particle.Particle::__str__(), ZMuMuRochCorAnalyzer.DiMuon::__str__(), DiObject.DiMuon::__str__(), operator()(), and datamodel.Object::p4().

width

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

Definition at line 27 of file BreitWigner.h.

Referenced by operator()().