The helicity matrix element class. More...

#include <HelicityMatrixElements.h>

Inheritance diagram for HelicityMatrixElement:

Public Member Functions
	HelicityMatrixElement ()
	Constructor and destructor.

virtual void	initPointers (ParticleData , CoupSM , Settings *=0)
	Initialize the physics matrices and pointers. More...

virtual HelicityMatrixElement *	initChannel (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 complex	calculateME (vector< int >)
	Calculate the helicity matrix element.

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.

Protected Member Functions
virtual void	initConstants ()
	Initialize the constants for the matrix element (called by initChannel).

virtual void	initWaves (vector< HelicityParticle > &)
	Initialize the wave functions (called by decayWeight and calculateRho/D).

Protected Attributes
double	DECAYWEIGHTMAX
	Maximum decay weight. WARNING: hardcoded constant.

vector< GammaMatrix >	gamma
	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.

ParticleData *	particleDataPtr
	Pointer to particle data.

CoupSM *	coupSMPtr
	Pointer to Standard Model constants.

Settings *	settingsPtr
	Pointer to Settings.

Detailed Description

The helicity matrix element class.

Member Function Documentation

complex breitWigner	(	double	s,
		double	M,
		double	G
	)

virtual

Calculate Breit-Wigner's with running widths and fixed.

Return a fixed width Breit-Wigner.

void calculateD ( vector< HelicityParticle > & p )

virtual

Calculate the decay matrix for a particle.

Calculate a particle's decay matrix.

Reset the D matrix to zero.

Initialize the wave functions.

Create the helicity vectors.

Call the recursive sub-method.

Normalize the decay matrix.

Reimplemented in HMETau2PhaseSpace.

void calculateRho	(	unsigned int	idx,
		vector< HelicityParticle > &	p
	)

virtual

Calculate the density matrix for a particle.

Calculate a particle's helicity density matrix.

Reset the rho matrix to zero.

Initialize the wave functions.

Create the helicity vectors.

Call the recursive sub-method.

Normalize the density matrix.

Reimplemented in HMETau2PhaseSpace.

double decayWeight ( vector< HelicityParticle > & p )

virtual

Calculate the matrix element weight for a decay.

Calculate a decay's weight.

Initialize the wave functions.

Create the helicity vectors.

Call the recursive sub-method.

Reimplemented in HMETau2PhaseSpace.

HelicityMatrixElement * initChannel ( vector< HelicityParticle > & p )

virtual

Initialize the channel.

Initialize the channel for the helicity matrix element.

void initPointers	(	ParticleData *	particleDataPtrIn,
		CoupSM *	coupSMPtrIn,
		Settings *	settingsPtrIn = `0`
	)

virtual

Initialize the physics matrices and pointers.

The HelicityMatrixElements class.

Initialize the helicity matrix element.

void setFermionLine	(	int	position,
		HelicityParticle &	p0,
		HelicityParticle &	p1
	)

Set a fermion line.

Initialize a fermion line.

First particle is incoming and particle, or outgoing and anti-particle.

First particle is outgoing and particle, or incoming and anti-particle.

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

include/Pythia8/HelicityMatrixElements.h
src/HelicityMatrixElements.cc

Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

Member Function Documentation