EvtParticle Class Reference

#include <EvtGenBase/EvtParticle.hh>

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)
void	setAttributeDouble (std::string attName, double attValue)
double	getAttributeDouble (std::string attName)

Protected Types
typedef std::map< std::string, int >	EvtAttIntMap
typedef std::map< std::string, double >	EvtAttDblMap

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
EvtAttIntMap	_intAttributes
EvtAttDblMap	_dblAttributes

Private Member Functions
void	makeStdHepRec (int firstparent, int lastparent, EvtStdHep &stdhep, EvtSecondary &secondary, EvtId *stable_parent_ihep)
void	makeStdHepRec (int firstparent, int lastparent, EvtStdHep &stdhep)
EvtParticle &	operator= (const EvtParticle &p)
	EvtParticle (const EvtParticle &p)

Private Attributes
EvtParticle *	_daug [MAX_DAUG]
size_t	_ndaug
EvtParticle *	_parent
int	_channel
int	_first
EvtId	_id
EvtVector4R	_p
EvtVector4R	_pBeforeFSR
double	_t
bool	_isInit
bool	_isDecayed
EvtSpinDensity	_rhoForward
EvtSpinDensity	_rhoBackward
int	_genlifetime
double *	_decayProb

Detailed Description

Definition at line 46 of file EvtParticle.hh.

Member Typedef Documentation

EvtAttDblMap

typedef std::map<std::string, double> EvtParticle::EvtAttDblMap

protected

Definition at line 462 of file EvtParticle.hh.

EvtAttIntMap

typedef std::map<std::string, int> EvtParticle::EvtAttIntMap

protected

Definition at line 458 of file EvtParticle.hh.

Constructor & Destructor Documentation

EvtParticle() [1/2]

EvtParticle::EvtParticle

(

)

Default constructor.

Definition at line 60 of file EvtParticle.cpp.

~EvtParticle()

EvtParticle::~EvtParticle ( )

virtual

Destructor.

Definition at line 55 of file EvtParticle.cpp.

EvtParticle() [2/2]

EvtParticle::EvtParticle ( const EvtParticle &  p )

private

Member Function Documentation

addDaug()

void EvtParticle::addDaug

(

EvtParticle *

node

)

Add another daughter to the particle

Definition at line 118 of file EvtParticle.cpp.

compMassProb()

double EvtParticle::compMassProb

(

)

Definition at line 562 of file EvtParticle.cpp.

decay()

void EvtParticle::decay

(

)

Decay particle

Definition at line 443 of file EvtParticle.cpp.

decayProb()

double* EvtParticle::decayProb ( )

inline

Definition at line 409 of file EvtParticle.hh.

deleteDaughters()

void EvtParticle::deleteDaughters

(

bool

keepChannel = false

)

Definition at line 596 of file EvtParticle.cpp.

deleteTree()

void EvtParticle::deleteTree

(

)

Delete a decay chain

Definition at line 609 of file EvtParticle.cpp.

eps()

EvtVector4C EvtParticle::eps ( int  i ) const

virtual

Returns polarization vector in the particles own restframe.

Reimplemented in EvtVectorParticle.

Definition at line 628 of file EvtParticle.cpp.

epsParent()

EvtVector4C EvtParticle::epsParent ( int  i ) const

virtual

Returns polarization vector in the parents restframe.

Reimplemented in EvtVectorParticle.

Definition at line 616 of file EvtParticle.cpp.

epsParentPhoton()

EvtVector4C EvtParticle::epsParentPhoton ( int  i )

virtual

Returns polarization vector in the parents restframe for a photon.

Reimplemented in EvtPhotonParticle.

Definition at line 640 of file EvtParticle.cpp.

epsPhoton()

EvtVector4C EvtParticle::epsPhoton ( int  i )

virtual

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

Reimplemented in EvtPhotonParticle.

Definition at line 652 of file EvtParticle.cpp.

epsTensor()

EvtTensor4C EvtParticle::epsTensor ( int  i ) const

virtual

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

Reimplemented in EvtTensorParticle.

Definition at line 725 of file EvtParticle.cpp.

epsTensorParent()

EvtTensor4C EvtParticle::epsTensorParent ( int  i ) const

virtual

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

Reimplemented in EvtTensorParticle.

Definition at line 713 of file EvtParticle.cpp.

firstornot()

int EvtParticle::firstornot

(

)

const

Used internally to decide if first time particle is decayed.

Definition at line 125 of file EvtParticle.cpp.

generateMassTree()

bool EvtParticle::generateMassTree

(

)

Definition at line 514 of file EvtParticle.cpp.

get4Pos()

EvtVector4R EvtParticle::get4Pos

(

)

const

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

Definition at line 798 of file EvtParticle.cpp.

getAttribute()

int EvtParticle::getAttribute

(

std::string

attName

)

Definition at line 1289 of file EvtParticle.cpp.

getAttributeDouble()

double EvtParticle::getAttributeDouble

(

std::string

attName

)

Definition at line 1305 of file EvtParticle.cpp.

getChannel()

int EvtParticle::getChannel

(

)

const

Retunrs the decay channel.

Definition at line 155 of file EvtParticle.cpp.

getDaug()

EvtParticle * EvtParticle::getDaug

(

int

i

)

Get pointer the the i:th daugther.

Definition at line 91 of file EvtParticle.cpp.

getId()

EvtId EvtParticle::getId

(

)

const

Returns Id of particle.

Definition at line 130 of file EvtParticle.cpp.

getLifetime()

double EvtParticle::getLifetime

(

)

Returns the lifetime.

Definition at line 113 of file EvtParticle.cpp.

getName()

std::string EvtParticle::getName

(

)

Definition at line 1283 of file EvtParticle.cpp.

getNDaug()

size_t EvtParticle::getNDaug

(

)

const

Returns number of daugthers.

Definition at line 160 of file EvtParticle.cpp.

getP4()

const EvtVector4R & EvtParticle::getP4

(

)

const

Returns 4momentum in parents restframe.

Definition at line 150 of file EvtParticle.cpp.

getP4Lab()

EvtVector4R EvtParticle::getP4Lab

(

)

const

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

Definition at line 761 of file EvtParticle.cpp.

getP4LabBeforeFSR()

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.

Definition at line 777 of file EvtParticle.cpp.

getP4Restframe()

EvtVector4R EvtParticle::getP4Restframe

(

)

const

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

Definition at line 793 of file EvtParticle.cpp.

getParent()

EvtParticle * EvtParticle::getParent

(

)

const

Returns pointer to parent particle.

Definition at line 96 of file EvtParticle.cpp.

getPDGId()

int EvtParticle::getPDGId

(

)

const

Returns the PDG id of the particle

Definition at line 135 of file EvtParticle.cpp.

getSpinDensityBackward()

EvtSpinDensity EvtParticle::getSpinDensityBackward ( )

inline

Get backward spin density matrix.

Definition at line 377 of file EvtParticle.hh.

getSpinDensityForward()

EvtSpinDensity EvtParticle::getSpinDensityForward ( )

inline

Get forward spin density matrix.

Definition at line 364 of file EvtParticle.hh.

getSpinStates()

int EvtParticle::getSpinStates

(

)

const

Returns number of spin states of the particle.

Definition at line 145 of file EvtParticle.cpp.

getSpinType()

EvtSpinType::spintype EvtParticle::getSpinType

(

)

const

Returns particle type.

Definition at line 140 of file EvtParticle.cpp.

hasValidP4()

bool EvtParticle::hasValidP4 ( )

inline

Definition at line 403 of file EvtParticle.hh.

init()

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

pure virtual

Initialiaze particle with id and 4momentum.

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

initDecay()

void EvtParticle::initDecay

(

bool

useMinMass = false

)

Definition at line 250 of file EvtParticle.cpp.

initializePhaseSpace()

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.

Definition at line 1102 of file EvtParticle.cpp.

insertDaugPtr()

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

inline

Makes partptr the idaug:th daugther.

Definition at line 220 of file EvtParticle.hh.

isDecayed()

bool EvtParticle::isDecayed ( )

inline

Definition at line 404 of file EvtParticle.hh.

isInitialized()

bool EvtParticle::isInitialized ( )

inline

Definition at line 402 of file EvtParticle.hh.

makeDaughters() [1/2]

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.

Definition at line 1239 of file EvtParticle.cpp.

makeDaughters() [2/2]

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.

Definition at line 1214 of file EvtParticle.cpp.

makeStdHep() [1/2]

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

Makes stdhep list

Definition at line 854 of file EvtParticle.cpp.

makeStdHep() [2/2]

void EvtParticle::makeStdHep

(

EvtStdHep &

stdhep

)

Definition at line 885 of file EvtParticle.cpp.

makeStdHepRec() [1/2]

void EvtParticle::makeStdHepRec ( int  firstparent, int  lastparent, EvtStdHep &  stdhep, EvtSecondary &  secondary, EvtId *  stable_parent_ihep  )

private

Definition at line 902 of file EvtParticle.cpp.

makeStdHepRec() [2/2]

void EvtParticle::makeStdHepRec ( int  firstparent, int  lastparent, EvtStdHep &  stdhep  )

private

Definition at line 933 of file EvtParticle.cpp.

mass()

double EvtParticle::mass

(

)

const

Returns mass of particle.

Definition at line 165 of file EvtParticle.cpp.

nextIter()

EvtParticle * EvtParticle::nextIter

(

EvtParticle *

rootOfTree = 0

)

Iterates over the particles in a decay chain.

Definition at line 821 of file EvtParticle.cpp.

noLifeTime()

void EvtParticle::noLifeTime ( )

inline

Definition at line 382 of file EvtParticle.hh.

operator=()

EvtParticle& EvtParticle::operator= ( const EvtParticle &  p )

private

printParticle()

void EvtParticle::printParticle

(

)

const

Prints information for the particle.

Definition at line 1022 of file EvtParticle.cpp.

printTree()

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.

Definition at line 978 of file EvtParticle.cpp.

printTreeRec()

void EvtParticle::printTreeRec

(

unsigned int

level

)

const

Definition at line 949 of file EvtParticle.cpp.

resetFirstOrNot()

void EvtParticle::resetFirstOrNot

(

)

Definition at line 81 of file EvtParticle.cpp.

resetNDaug()

void EvtParticle::resetNDaug ( )

inline

Definition at line 286 of file EvtParticle.hh.

rotateToHelicityBasis() [1/2]

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

rotateToHelicityBasis() [2/2]

virtual EvtSpinDensity EvtParticle::rotateToHelicityBasis ( double  alpha, double  beta, double  gamma  ) const

pure virtual

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

setAttribute()

void EvtParticle::setAttribute ( std::string  attName, int  attValue  )

inline

Definition at line 418 of file EvtParticle.hh.

setAttributeDouble()

void EvtParticle::setAttributeDouble ( std::string  attName, double  attValue  )

inline

Definition at line 428 of file EvtParticle.hh.

setChannel()

void EvtParticle::setChannel

(

int

i

)

Should only be used internally.

Definition at line 86 of file EvtParticle.cpp.

setDecayProb()

void EvtParticle::setDecayProb

(

double

p

)

Definition at line 1276 of file EvtParticle.cpp.

setDiagonalSpinDensity()

void EvtParticle::setDiagonalSpinDensity

(

)

Set diagonal spindensity matrix.

Definition at line 170 of file EvtParticle.cpp.

setFirstOrNot()

void EvtParticle::setFirstOrNot

(

)

Definition at line 77 of file EvtParticle.cpp.

setFSRP4toZero()

void EvtParticle::setFSRP4toZero ( )

inline

Definition at line 275 of file EvtParticle.hh.

setId()

void EvtParticle::setId ( EvtId  id )

inline

Definition at line 385 of file EvtParticle.hh.

setLifetime() [1/2]

void EvtParticle::setLifetime

(

double

tau

)

Set lifetime of the particle in parents restframe.

Definition at line 101 of file EvtParticle.cpp.

setLifetime() [2/2]

void EvtParticle::setLifetime

(

)

Generate lifetime according to pure exponential.

Definition at line 106 of file EvtParticle.cpp.

setMass()

void EvtParticle::setMass ( double  m )

inline

Definition at line 392 of file EvtParticle.hh.

setp() [1/2]

void EvtParticle::setp ( double  e, double  px, double  py, double  pz  )

inlineprotected

Definition at line 437 of file EvtParticle.hh.

setp() [2/2]

void EvtParticle::setp ( const EvtVector4R &  p4 )

inlineprotected

Definition at line 443 of file EvtParticle.hh.

setP4()

void EvtParticle::setP4 ( const EvtVector4R &  p4 )

inline

Sets the 4momentum in the parents restframe.

Definition at line 267 of file EvtParticle.hh.

setP4WithFSR()

void EvtParticle::setP4WithFSR ( const EvtVector4R &  p4 )

inline

Definition at line 273 of file EvtParticle.hh.

setpart_num()

void EvtParticle::setpart_num ( EvtId  particle_number )

inlineprotected

Definition at line 449 of file EvtParticle.hh.

setSpinDensityBackward()

void EvtParticle::setSpinDensityBackward ( const EvtSpinDensity &  rho )

inline

Set backward spin density matrix.

Definition at line 369 of file EvtParticle.hh.

setSpinDensityForward()

void EvtParticle::setSpinDensityForward ( const EvtSpinDensity &  rho )

inline

Set forward spin density matrix.

Definition at line 337 of file EvtParticle.hh.

setSpinDensityForwardHelicityBasis() [1/2]

void EvtParticle::setSpinDensityForwardHelicityBasis

(

const EvtSpinDensity &

rho

)

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

Definition at line 196 of file EvtParticle.cpp.

setSpinDensityForwardHelicityBasis() [2/2]

void EvtParticle::setSpinDensityForwardHelicityBasis	(	const EvtSpinDensity &	rho,
		double	alpha,
		double	beta,
		double	gamma
	)

Definition at line 222 of file EvtParticle.cpp.

setVectorSpinDensity()

void EvtParticle::setVectorSpinDensity

(

)

Set spindensity matrix for e+e- -> V

Definition at line 175 of file EvtParticle.cpp.

sp()

EvtDiracSpinor EvtParticle::sp ( int  i ) const

virtual

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

Reimplemented in EvtDiracParticle.

Definition at line 677 of file EvtParticle.cpp.

spNeutrino()

EvtDiracSpinor EvtParticle::spNeutrino ( ) const

virtual

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

Reimplemented in EvtNeutrinoParticle.

Definition at line 701 of file EvtParticle.cpp.

spParent()

EvtDiracSpinor EvtParticle::spParent ( int  i ) const

virtual

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

Reimplemented in EvtDiracParticle.

Definition at line 665 of file EvtParticle.cpp.

spParentNeutrino()

EvtDiracSpinor EvtParticle::spParentNeutrino ( ) const

virtual

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

Reimplemented in EvtNeutrinoParticle.

Definition at line 689 of file EvtParticle.cpp.

spRS()

EvtRaritaSchwinger EvtParticle::spRS ( int  i ) const

virtual

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

Reimplemented in EvtRaritaSchwingerParticle.

Definition at line 749 of file EvtParticle.cpp.

spRSParent()

EvtRaritaSchwinger EvtParticle::spRSParent ( int  i ) const

virtual

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

Reimplemented in EvtRaritaSchwingerParticle.

Definition at line 737 of file EvtParticle.cpp.

treeStr()

std::string EvtParticle::treeStr

(

)

const

Definition at line 1012 of file EvtParticle.cpp.

treeStrRec()

std::string EvtParticle::treeStrRec

(

unsigned int

level

)

const

Definition at line 990 of file EvtParticle.cpp.

Member Data Documentation

_channel

int EvtParticle::_channel

private

Definition at line 469 of file EvtParticle.hh.

_daug

EvtParticle* EvtParticle::_daug[MAX_DAUG]

private

Definition at line 466 of file EvtParticle.hh.

_dblAttributes

EvtAttDblMap EvtParticle::_dblAttributes

protected

Definition at line 463 of file EvtParticle.hh.

_decayProb

double* EvtParticle::_decayProb

private

Definition at line 495 of file EvtParticle.hh.

_first

int EvtParticle::_first

private

Definition at line 470 of file EvtParticle.hh.

_genlifetime

int EvtParticle::_genlifetime

private

Definition at line 488 of file EvtParticle.hh.

_id

EvtId EvtParticle::_id

private

Definition at line 471 of file EvtParticle.hh.

_intAttributes

EvtAttIntMap EvtParticle::_intAttributes

protected

Definition at line 459 of file EvtParticle.hh.

_isDecayed

bool EvtParticle::_isDecayed

private

Definition at line 476 of file EvtParticle.hh.

_isInit

bool EvtParticle::_isInit

private

Definition at line 475 of file EvtParticle.hh.

_ndaug

size_t EvtParticle::_ndaug

private

Definition at line 467 of file EvtParticle.hh.

_p

EvtVector4R EvtParticle::_p

private

Definition at line 472 of file EvtParticle.hh.

_parent

EvtParticle* EvtParticle::_parent

private

Definition at line 468 of file EvtParticle.hh.

_pBeforeFSR

EvtVector4R EvtParticle::_pBeforeFSR

private

Definition at line 473 of file EvtParticle.hh.

_rhoBackward

EvtSpinDensity EvtParticle::_rhoBackward

private

Definition at line 481 of file EvtParticle.hh.

_rhoForward

EvtSpinDensity EvtParticle::_rhoForward

private

Definition at line 480 of file EvtParticle.hh.

_t

double EvtParticle::_t

private

Definition at line 474 of file EvtParticle.hh.

_validP4

bool EvtParticle::_validP4

protected

Definition at line 455 of file EvtParticle.hh.

---

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

• EvtGenBase/EvtParticle.hh
• src/EvtGenBase/EvtParticle.cpp