PYTHIA  8.303
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HMEZ2TwoFermions Class Reference

Helicity matrix element for the hard process of Z/Z' -> two fermions. More...

#include <HelicityMatrixElements.h>

Inheritance diagram for HMEZ2TwoFermions:
HMEX2TwoFermions HelicityMatrixElement

Public Member Functions

void initConstants ()
 Helicity matrix element for Z/Z' -> two fermions. More...
 
complex calculateME (vector< int >)
 Return element for helicity matrix element.
 
- Public Member Functions inherited from HMEX2TwoFermions
void initWaves (vector< HelicityParticle > &)
 Helicity matrix element for X -> two fermions. More...
 
- Public Member Functions inherited from HelicityMatrixElement
 HelicityMatrixElement ()
 Constructor and destructor.
 
virtual void initPointers (ParticleData *, CoupSM *, Settings *=0)
 Initialize the physics matrices and pointers. More...
 
virtual HelicityMatrixElementinitChannel (vector< HelicityParticle > &)
 Initialize the channel. More...
 
virtual double decayWeight (vector< HelicityParticle > &)
 Calculate the matrix element weight for a decay. More...
 
virtual double decayWeightMax (vector< HelicityParticle > &)
 Calculate the maximum matrix element decay weight.
 
virtual void calculateD (vector< HelicityParticle > &)
 Calculate the decay matrix for a particle. More...
 
virtual void calculateRho (unsigned int, vector< HelicityParticle > &)
 Calculate the density matrix for a particle. More...
 
void setFermionLine (int, HelicityParticle &, HelicityParticle &)
 Set a fermion line. More...
 
virtual complex breitWigner (double s, double M, double G)
 Calculate Breit-Wigner's with running widths and fixed. More...
 
virtual complex sBreitWigner (double m0, double m1, double s, double M, double G)
 Return an s-wave BreitWigner.
 
virtual complex pBreitWigner (double m0, double m1, double s, double M, double G)
 Return a p-wave BreitWigner.
 
virtual complex dBreitWigner (double m0, double m1, double s, double M, double G)
 Return a d-wave BreitWigner.
 

Additional Inherited Members

- Protected Attributes inherited from HelicityMatrixElement
double DECAYWEIGHTMAX
 Maximum decay weight. WARNING: hardcoded constant.
 
vector< GammaMatrixgamma
 Physics matrices.
 
vector< int > pMap
 Particle map vector.
 
vector< int > pID
 Particle ID vector.
 
vector< double > pM
 Particle mass vector.
 
vector< vector< Wave4 > > u
 Wave functions.
 
ParticleDataparticleDataPtr
 Pointer to particle data.
 
CoupSMcoupSMPtr
 Pointer to Standard Model constants.
 
SettingssettingsPtr
 Pointer to Settings.
 

Detailed Description

Helicity matrix element for the hard process of Z/Z' -> two fermions.

Member Function Documentation

void initConstants ( )
virtual

Helicity matrix element for Z/Z' -> two fermions.

This matrix element is used when the production of the Z is from an unknown process. p2CA: axial coupling of particle 2 to the Z p2CV: vector coupling of particle 2 to the Z Initialize the constants for the helicity matrix element.

Set the vector and axial couplings to the fermions.

Reimplemented from HelicityMatrixElement.


The documentation for this class was generated from the following files: