EvtParticle Class Reference

Inheritance diagram for EvtParticle:

Public Member Functions
	EvtParticle ()
virtual	~EvtParticle ()
virtual EvtVector4C	epsParent (int i) const
virtual EvtVector4C	eps (int i) const
virtual EvtVector4C	epsParentPhoton (int i)
virtual EvtVector4C	epsPhoton (int i)
virtual EvtDiracSpinor	spParent (int) const
virtual EvtDiracSpinor	sp (int) const
virtual EvtDiracSpinor	spParentNeutrino () const
virtual EvtDiracSpinor	spNeutrino () const
virtual EvtTensor4C	epsTensorParent (int i) const
virtual EvtTensor4C	epsTensor (int i) const
virtual EvtRaritaSchwinger	spRSParent (int) const
virtual EvtRaritaSchwinger	spRS (int) const
virtual void	init (EvtId part_n, const EvtVector4R &p4)=0
void	addDaug (EvtParticle *node)
void	decay ()
void	deleteTree ()
void	deleteDaughters (bool keepChannel=false)
void	setChannel (int i)
void	makeDaughters (unsigned int ndaug, EvtId *id)
void	makeDaughters (unsigned int ndaug, std::vector< EvtId > idVector)
double	initializePhaseSpace (unsigned int numdaughter, EvtId *daughters, bool forceResetMasses=false, double poleSize=-1., int whichTwo1=0, int whichTwo2=1)
EvtParticle *	getDaug (int i)
EvtParticle *	nextIter (EvtParticle *rootOfTree=0)
void	makeStdHep (EvtStdHep &stdhep, EvtSecondary &secondary, EvtId *stable_parent_ihep)
void	makeStdHep (EvtStdHep &stdhep)
EvtVector4R	getP4Lab () const
EvtVector4R	getP4LabBeforeFSR ()
EvtVector4R	getP4Restframe () const
EvtVector4R	get4Pos () const
EvtParticle *	getParent () const
void	insertDaugPtr (int idaug, EvtParticle *partptr)
double	mass () const
int	firstornot () const
void	setFirstOrNot ()
void	resetFirstOrNot ()
EvtId	getId () const
int	getPDGId () const
EvtSpinType::spintype	getSpinType () const
int	getSpinStates () const
const EvtVector4R &	getP4 () const
void	setP4 (const EvtVector4R &p4)
void	setP4WithFSR (const EvtVector4R &p4)
void	setFSRP4toZero ()
int	getChannel () const
size_t	getNDaug () const
void	resetNDaug ()
void	printTree () const
void	printTreeRec (unsigned int level) const
std::string	treeStr () const
std::string	treeStrRec (unsigned int level) const
void	printParticle () const
void	setLifetime (double tau)
void	setLifetime ()
double	getLifetime ()
void	setDiagonalSpinDensity ()
void	setVectorSpinDensity ()
void	setSpinDensityForward (const EvtSpinDensity &rho)
void	setSpinDensityForwardHelicityBasis (const EvtSpinDensity &rho)
void	setSpinDensityForwardHelicityBasis (const EvtSpinDensity &rho, double alpha, double beta, double gamma)
virtual EvtSpinDensity	rotateToHelicityBasis () const =0
virtual EvtSpinDensity	rotateToHelicityBasis (double alpha, double beta, double gamma) const =0
EvtSpinDensity	getSpinDensityForward ()
void	setSpinDensityBackward (const EvtSpinDensity &rho)
EvtSpinDensity	getSpinDensityBackward ()
void	noLifeTime ()
void	setId (EvtId id)
void	initDecay (bool useMinMass=false)
bool	generateMassTree ()
double	compMassProb ()
void	setMass (double m)
bool	isInitialized ()
bool	hasValidP4 ()
bool	isDecayed ()
double *	decayProb ()
void	setDecayProb (double p)
std::string	getName ()
void	setAttribute (std::string attName, int attValue)
int	getAttribute (std::string attName)

Protected Types
typedef std::map< std::string, int >	EvtAttributeMap

Protected Member Functions
void	setp (double e, double px, double py, double pz)
void	setp (const EvtVector4R &p4)
void	setpart_num (EvtId particle_number)

Protected Attributes
bool	_validP4
EvtAttributeMap	_attributes

Detailed Description

Definition at line 45 of file EvtParticle.hh.

Constructor & Destructor Documentation

EvtParticle::EvtParticle

(

)

Default constructor.

virtual EvtParticle::~EvtParticle ( )

virtual

Destructor.

Member Function Documentation

void EvtParticle::addDaug

(

EvtParticle *

node

)

Add another daughter to the particle

void EvtParticle::decay

(

)

Decay particle

void EvtParticle::deleteTree

(

)

Delete a decay chain

Referenced by StarEvtGenDecayer::ClearEvent(), and StarEvtGenDecayer::~StarEvtGenDecayer().

virtual EvtVector4C EvtParticle::eps ( int  i ) const

virtual

Returns polarization vector in the particles own restframe.

Reimplemented in EvtVectorParticle.

virtual EvtVector4C EvtParticle::epsParent ( int  i ) const

virtual

Returns polarization vector in the parents restframe.

Reimplemented in EvtVectorParticle.

virtual EvtVector4C EvtParticle::epsParentPhoton ( int  i )

virtual

Returns polarization vector in the parents restframe for a photon.

Reimplemented in EvtPhotonParticle.

virtual EvtVector4C EvtParticle::epsPhoton ( int  i )

virtual

Returns polarization vector in the particles own restframe for a photon.

Reimplemented in EvtPhotonParticle.

virtual EvtTensor4C EvtParticle::epsTensor ( int  i ) const

virtual

Returns tensor in the particles own restframe for a spin 2 particle.

Reimplemented in EvtTensorParticle.

virtual EvtTensor4C EvtParticle::epsTensorParent ( int  i ) const

virtual

Returns tensor in the parents restframe for a spin 2 particle.

Reimplemented in EvtTensorParticle.

int EvtParticle::firstornot

(

)

const

Used internally to decide if first time particle is decayed.

EvtVector4R EvtParticle::get4Pos

(

)

const

Returns the 4position of the particle in the lab frame.

int EvtParticle::getChannel

(

)

const

Retunrs the decay channel.

EvtParticle* EvtParticle::getDaug

(

int

i

)

Get pointer the the i:th daugther.

EvtId EvtParticle::getId

(

)

const

Returns Id of particle.

double EvtParticle::getLifetime

(

)

Returns the lifetime.

size_t EvtParticle::getNDaug

(

)

const

Returns number of daugthers.

const EvtVector4R& EvtParticle::getP4

(

)

const

Returns 4momentum in parents restframe.

Referenced by EvtVectorParticle::epsParent().

EvtVector4R EvtParticle::getP4Lab

(

)

const

Gets 4vector in the labframe, i.e., the frame in which the root particles momentum is measured.

EvtVector4R EvtParticle::getP4LabBeforeFSR

(

)

Gets 4vector in the labframe for the 4-momentum before FSR was generated in the parents decay. The lab frame is where the root particles momentum is measured.

EvtVector4R EvtParticle::getP4Restframe

(

)

const

Gets 4vector in the particles restframe, i.e. this functiont will return (m,0,0,0)

EvtParticle* EvtParticle::getParent

(

)

const

Returns pointer to parent particle.

int EvtParticle::getPDGId

(

)

const

Returns the PDG id of the particle

EvtSpinDensity EvtParticle::getSpinDensityBackward ( )

inline

Get backward spin density matrix.

Definition at line 378 of file EvtParticle.hh.

EvtSpinDensity EvtParticle::getSpinDensityForward ( )

inline

Get forward spin density matrix.

Definition at line 368 of file EvtParticle.hh.

int EvtParticle::getSpinStates

(

)

const

Returns number of spin states of the particle.

EvtSpinType::spintype EvtParticle::getSpinType

(

)

const

Returns particle type.

virtual void EvtParticle::init ( EvtId  part_n, const EvtVector4R &  p4  )

pure virtual

Initialiaze particle with id and 4momentum.

Implemented in EvtPhotonParticle, EvtVectorParticle, EvtDiracParticle, EvtRaritaSchwingerParticle, EvtScalarParticle, EvtHighSpinParticle, EvtNeutrinoParticle, EvtStringParticle, and EvtTensorParticle.

double EvtParticle::initializePhaseSpace	(	unsigned int	numdaughter,
		EvtId *	daughters,
		bool	forceResetMasses = false,
		double	poleSize = -1.,
		int	whichTwo1 = 0,
		int	whichTwo2 = 1
	)

Similar to the routine above except that here momentum is generated according to phase space daughters are filled with this momentum.

void EvtParticle::insertDaugPtr ( int  idaug, EvtParticle *  partptr  )

inline

Makes partptr the idaug:th daugther.

Definition at line 229 of file EvtParticle.hh.

void EvtParticle::makeDaughters	(	unsigned int	ndaug,
		EvtId *	id
	)

Creates the daughters in the list of ids and adds them to the parent. Note that momentum is left uninitialized, this is only creation.

void EvtParticle::makeDaughters	(	unsigned int	ndaug,
		std::vector< EvtId >	idVector
	)

Creates the daughters in the list of ids and adds them to the parent. Note that momentum is left uninitialized, this is only creation.

void EvtParticle::makeStdHep	(	EvtStdHep &	stdhep,
		EvtSecondary &	secondary,
		EvtId *	stable_parent_ihep
	)

Makes stdhep list

double EvtParticle::mass

(

)

const

Returns mass of particle.

EvtParticle* EvtParticle::nextIter

(

EvtParticle *

rootOfTree = 0

)

Iterates over the particles in a decay chain.

void EvtParticle::printParticle

(

)

const

Prints information for the particle.

void EvtParticle::printTree

(

)

const

Prints out the particle "tree" of a given particle. The tree consists of all daughters (and their daughters, etc) and their properties.

virtual EvtSpinDensity EvtParticle::rotateToHelicityBasis ( ) const

pure virtual

Returns a rotation matrix need to rotate the basis state to the helicity basis. The EvtSpinDensity matrix is just use as a matrix here. This function is to be implemented in each derived class.

Implemented in EvtRaritaSchwingerParticle, EvtPhotonParticle, EvtDiracParticle, EvtTensorParticle, EvtVectorParticle, EvtStringParticle, EvtNeutrinoParticle, EvtScalarParticle, and EvtHighSpinParticle.

void EvtParticle::setChannel

(

int

i

)

Should only be used internally.

void EvtParticle::setDiagonalSpinDensity

(

)

Set diagonal spindensity matrix.

Referenced by StarEvtGenDecayer::AppendParticle().

void EvtParticle::setLifetime

(

double

tau

)

Set lifetime of the particle in parents restframe.

void EvtParticle::setLifetime

(

)

Generate lifetime according to pure exponential.

void EvtParticle::setP4 ( const EvtVector4R &  p4 )

inline

Sets the 4momentum in the parents restframe.

Definition at line 273 of file EvtParticle.hh.

void EvtParticle::setSpinDensityBackward ( const EvtSpinDensity &  rho )

inline

Set backward spin density matrix.

Definition at line 373 of file EvtParticle.hh.

void EvtParticle::setSpinDensityForward ( const EvtSpinDensity &  rho )

inline

Set forward spin density matrix.

Definition at line 342 of file EvtParticle.hh.

void EvtParticle::setSpinDensityForwardHelicityBasis

(

const EvtSpinDensity &

rho

)

Set forward spin density matrix according to the density matrix rho in the helicity amplitude basis.

void EvtParticle::setVectorSpinDensity

(

)

Set spindensity matrix for e+e- -> V

virtual EvtDiracSpinor EvtParticle::sp ( int  ) const

virtual

Returns Dirac spinor in the particles own restframe for a Dirac particle.

Reimplemented in EvtDiracParticle.

virtual EvtDiracSpinor EvtParticle::spNeutrino ( ) const

virtual

Returns Dirac spinor in the particles own restframe for a Neutrino particle.

Reimplemented in EvtNeutrinoParticle.

virtual EvtDiracSpinor EvtParticle::spParent ( int  ) const

virtual

Returns Dirac spinor in the parents restframe for a Dirac particle.

Reimplemented in EvtDiracParticle.

virtual EvtDiracSpinor EvtParticle::spParentNeutrino ( ) const

virtual

Returns Dirac spinor in the parents restframe for a Neutrino particle.

Reimplemented in EvtNeutrinoParticle.

virtual EvtRaritaSchwinger EvtParticle::spRS ( int  ) const

virtual

Returns Rarita-Schwinger spinor in the particles own restframe for a Rarita-Schwinger particle.

Reimplemented in EvtRaritaSchwingerParticle.

virtual EvtRaritaSchwinger EvtParticle::spRSParent ( int  ) const

virtual

Returns Rarita-Schwinger spinor in the parents restframe for a Rarita-Schwinger particle.

Reimplemented in EvtRaritaSchwingerParticle.

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

• StarGenerator/EvtGen1_06_00/EvtGenBase/EvtParticle.hh