#include <EvtVectorParticle.hh>

Inheritance diagram for EvtVectorParticle:

Public Member Functions
	EvtVectorParticle ()

virtual	~EvtVectorParticle ()

void	init (EvtId part_n, double e, double px, double py, double pz)

void	init (EvtId part_n, const EvtVector4R &p)

EvtVector4C	epsParent (int i) const

EvtVector4C	eps (int i) const

EvtSpinDensity	rotateToHelicityBasis () const

EvtSpinDensity	rotateToHelicityBasis (double alpha, double beta, double gamma) const

Public Member Functions inherited from EvtParticle
	EvtParticle ()

virtual	~EvtParticle ()

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

void	addDaug (EvtParticle *node)

void	decay ()

void	deleteTree ()

void	deleteDaughters (bool keepChannel=false)

void	setChannel (int i)

void	setGeneratorFlag (int flag)

int	getGeneratorFlag ()

void	makeDaughters (int ndaug, EvtId *id)

double	initializePhaseSpace (int numdaughter, EvtId *daughters, 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 ()

EvtVector4R	getP4Restframe ()

EvtVector4R	get4Pos ()

EvtParticle *	getParent ()

void	insertDaugPtr (int idaug, EvtParticle *partptr)

double	mass () const

int	firstornot () const

void	setFirstOrNot ()

void	resetFirstOrNot ()

EvtId	getId () const

EvtSpinType::spintype	getSpinType () const

int	getSpinStates () const

const EvtVector4R &	getP4 () const

void	setP4 (const EvtVector4R &p4)

int	getChannel () const

int	getNDaug () const

void	resetNDaug ()

void	printTree () const

void	printTreeRec (int level) const

std::string	writeTreeRec (std::string) const

void	dumpTree () const

void	dumpTreeRec (int level, int dj) const

std::string	treeStr () const

std::string	treeStrRec (int level) const

void	printParticle () const

void	setLifetime (double tau)

void	setLifetime ()

double	getLifetime ()

void	setDiagonalSpinDensity ()

void	setVectorSpinDensity ()

void	setPolarizedSpinDensity (double r00, double r11, double r22)

void	setSpinDensityForward (const EvtSpinDensity &rho)

void	setSpinDensityForwardHelicityBasis (const EvtSpinDensity &rho)

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

EvtSpinDensity	getSpinDensityForward ()

void	setSpinDensityBackward (const EvtSpinDensity &rho)

EvtSpinDensity	getSpinDensityBackward ()

void	noLifeTime ()

void	setId (EvtId id)

void	initDecay (bool useMinMass=false)

void	generateMassTree ()

double	compMassProb ()

void	setMass (double m)

bool	isInitialized ()

bool	hasValidP4 ()

bool	isDecayed ()

double *	decayProb ()

void	setDecayProb (double p)

void	setInclusiveMode (int im)

int	getInclusiveMode ()

Additional Inherited Members
Protected Member Functions inherited from EvtParticle
void	setp (double e, double px, double py, double pz)

void	setp (const EvtVector4R &p4)

void	setpart_num (EvtId particle_number)

Protected Attributes inherited from EvtParticle
bool	_validP4

Detailed Description

Definition at line 30 of file EvtVectorParticle.hh.

Constructor & Destructor Documentation

◆ EvtVectorParticle()

EvtVectorParticle::EvtVectorParticle ( )

inline

Definition at line 34 of file EvtVectorParticle.hh.

34{}

◆ ~EvtVectorParticle()

EvtVectorParticle::~EvtVectorParticle ( )

virtual

Definition at line 31 of file EvtVectorParticle.cc.

31{}

Member Function Documentation

◆ eps()

EvtVector4C EvtVectorParticle::eps ( int i ) const

inlinevirtual

Returns polarization vector in the particles own restframe.

Reimplemented from EvtParticle.

Definition at line 40 of file EvtVectorParticle.hh.

40{return _eps[i];}

◆ epsParent()

EvtVector4C EvtVectorParticle::epsParent ( int i ) const

inlinevirtual

Returns polarization vector in the parents restframe.

Reimplemented from EvtParticle.

Definition at line 39 of file EvtVectorParticle.hh.

39{return boostTo(_eps[i],this->getP4());}

boostTo

EvtDiracSpinor boostTo(const EvtDiracSpinor &sp, const EvtVector4R p4)

Definition EvtDiracSpinor.cc:75

EvtParticle::getP4

const EvtVector4R & getP4() const

Definition EvtParticle.cc:121

◆ init() [1/2]

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

virtual

Initialiaze particle with id and 4momentum.

Implements EvtParticle.

Definition at line 47 of file EvtVectorParticle.cc.

                                                              {
 
  _validP4=true;
  setp(p4);
  setpart_num(part_n);
  
  _eps[0].set(0.0,1.0,0.0,0.0);
  _eps[1].set(0.0,0.0,1.0,0.0);
  _eps[2].set(0.0,0.0,0.0,1.0);
 
  setLifetime();
}

◆ init() [2/2]

void EvtVectorParticle::init	(	EvtId	part_n,
		double	e,
		double	px,
		double	py,
		double	pz )

Definition at line 34 of file EvtVectorParticle.cc.

                                                                               {
 
  _validP4=true;
  setp(e,px,py,pz);
  setpart_num(part_n);
  
  _eps[0].set(0.0,1.0,0.0,0.0);
  _eps[1].set(0.0,0.0,1.0,0.0);
  _eps[2].set(0.0,0.0,0.0,1.0);
 
  setLifetime();
}

Referenced by EvtGen::generateEvent(), and EvtParticleFactory::particleFactory().

◆ rotateToHelicityBasis() [1/2]

EvtSpinDensity EvtVectorParticle::rotateToHelicityBasis ( ) const

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.

Implements EvtParticle.

Definition at line 61 of file EvtVectorParticle.cc.

                                                             {
 
  static EvtVector4C eplus(0.0,-1.0/sqrt(2.0),EvtComplex(0.0,-1.0/sqrt(2.0)),0.0);
  static EvtVector4C ezero(0.0,0.0,0.0,1.0);
  static EvtVector4C eminus(0.0,1.0/sqrt(2.0),EvtComplex(0.0,-1.0/sqrt(2.0)),0.0);
  
  static EvtVector4C eplusC(eplus.conj());
  static EvtVector4C ezeroC(ezero.conj());
  static EvtVector4C eminusC(eminus.conj());
 
  EvtSpinDensity R;
  R.SetDim(3);
 
  for ( int i=0; i<3; i++ ) {
    R.Set(0,i,(eplusC)*_eps[i]);
    R.Set(1,i,(ezeroC)*_eps[i]);
    R.Set(2,i,(eminusC)*_eps[i]);
  }
 
  return R;
 
}

◆ rotateToHelicityBasis() [2/2]

EvtSpinDensity EvtVectorParticle::rotateToHelicityBasis	(	double	alpha,
		double	beta,
		double	gamma ) const

virtual

Implements EvtParticle.

Definition at line 85 of file EvtVectorParticle.cc.

                                               {
 
  EvtVector4C eplus(0.0,-1.0/sqrt(2.0),EvtComplex(0.0,-1.0/sqrt(2.0)),0.0);
  EvtVector4C ezero(0.0,0.0,0.0,1.0);
  EvtVector4C eminus(0.0,1.0/sqrt(2.0),EvtComplex(0.0,-1.0/sqrt(2.0)),0.0);
  
  eplus.applyRotateEuler(alpha,beta,gamma);
  ezero.applyRotateEuler(alpha,beta,gamma);
  eminus.applyRotateEuler(alpha,beta,gamma);
 
  EvtSpinDensity R;
  R.SetDim(3);
 
 
  for ( int i=0; i<3; i++ ) {
    R.Set(0,i,(eplus.conj())*_eps[i]);
    R.Set(1,i,(ezero.conj())*_eps[i]);
    R.Set(2,i,(eminus.conj())*_eps[i]);
  }
 
  return R;
 
}

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

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ EvtVectorParticle()

◆ ~EvtVectorParticle()

Member Function Documentation

◆ eps()

◆ epsParent()

◆ init() [1/2]

◆ init() [2/2]

◆ rotateToHelicityBasis() [1/2]

◆ rotateToHelicityBasis() [2/2]