#include <EvtNeutrinoParticle.hh>

Inheritance diagram for EvtNeutrinoParticle:

Public Member Functions
	EvtNeutrinoParticle ()

virtual	~EvtNeutrinoParticle ()

void	init (EvtId part_n, const EvtVector4R &p4)

EvtDiracSpinor	spParentNeutrino () const

EvtDiracSpinor	spNeutrino () const

EvtSpinDensity	rotateToHelicityBasis () const

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

Public Member Functions inherited from EvtParticle
	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 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 EvtNeutrinoParticle.hh.

Constructor & Destructor Documentation

◆ EvtNeutrinoParticle()

EvtNeutrinoParticle::EvtNeutrinoParticle ( )

Definition at line 36 of file EvtNeutrinoParticle.cc.

◆ ~EvtNeutrinoParticle()

EvtNeutrinoParticle::~EvtNeutrinoParticle ( )

virtual

Definition at line 34 of file EvtNeutrinoParticle.cc.

34{}

Member Function Documentation

◆ init()

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

virtual

Initialiaze particle with id and 4momentum.

Implements EvtParticle.

Definition at line 41 of file EvtNeutrinoParticle.cc.

                                                                {
  
  _validP4=true;
  setp(p4);
  setpart_num(part_n);
   
  double e,px,py,pz;
  e=p4.get(0);
  px=p4.get(1);
  py=p4.get(2);
  pz=p4.get(3);
 
  if (EvtPDL::getStdHep(part_n)==0){
    report(ERROR,"EvtGen") << "Error in EvtNeutrinoParticle::init, part_n="
               << part_n.getId()<<endl;
  }
 
  if (EvtPDL::getStdHep(part_n)>0){  
  
    double beta,alpha,p2,norm;
  
    // See Sakurai p. 167-169
    // and Renton p. 126
  
    p2=px*px+py*py+pz*pz;
  
    beta=acos(pz/sqrt(p2));
    alpha=atan2(py,px);
  
    norm=sqrt(2*e);
  
    double cosb,sinb,cosa,sina;
  
    cosb=cos(0.5*beta);
    sinb=sin(0.5*beta);
  
    cosa=cos(0.5*alpha);
    sina=sin(0.5*alpha);
  
    spinor_parent.set(-norm*sinb*EvtComplex(cosa,-sina),
            norm*cosb*EvtComplex(cosa,sina),
            norm*sinb*EvtComplex(cosa,-sina),
            -norm*cosb*EvtComplex(cosa,sina));
 
  }
  else{
 
    px=-p4.get(1);
    py=-p4.get(2);
    pz=-p4.get(3);
   
    double pn,sqrpn;
 
    pn=e;
    sqrpn=sqrt(pn-pz);
   
    spinor_parent.set((1.0/sqrpn)*EvtComplex(px,-py),
                      EvtComplex(sqrpn,0.0),
              (-1.0/sqrpn)*EvtComplex(px,-py),
              -EvtComplex(sqrpn,0.0)); 
 
 
  }
 
  setLifetime();
 
} 

Referenced by EvtParticleFactory::particleFactory().

◆ rotateToHelicityBasis() [1/2]

EvtSpinDensity EvtNeutrinoParticle::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 126 of file EvtNeutrinoParticle.cc.

                                                               {
 
  report(ERROR,"EvtGen") << "rotateToHelicityBasis not implemented for neutrino."; 
  report(ERROR,"EvtGen") << "Will terminate execution."; 
 
  ::abort();
 
  EvtSpinDensity rho;
  return rho;
  
}

◆ rotateToHelicityBasis() [2/2]

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

virtual

Implements EvtParticle.

Definition at line 138 of file EvtNeutrinoParticle.cc.

                                                 {
 
  report(ERROR,"EvtGen") << "rotateToHelicityBasis(alpha,beta,gamma) not implemented for neutrino."; 
  report(ERROR,"EvtGen") << "Will terminate execution."; 
 
  ::abort();
 
  EvtSpinDensity rho;
  return rho;
 
}

◆ spNeutrino()

EvtDiracSpinor EvtNeutrinoParticle::spNeutrino ( ) const

virtual

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

Reimplemented from EvtParticle.

Definition at line 115 of file EvtNeutrinoParticle.cc.

                                                     {
 
  report(ERROR,"EvtGen") << "Tried to get neutrino spinor in restframe"; 
  report(ERROR,"EvtGen") << "Will terminate execution."; 
 
  ::abort();
 
  return spinor_rest;
}

◆ spParentNeutrino()

EvtDiracSpinor EvtNeutrinoParticle::spParentNeutrino ( ) const

virtual

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

Reimplemented from EvtParticle.

Definition at line 110 of file EvtNeutrinoParticle.cc.

                                                           {
  
  return spinor_parent;
}

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

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ EvtNeutrinoParticle()

◆ ~EvtNeutrinoParticle()

Member Function Documentation

◆ init()

◆ rotateToHelicityBasis() [1/2]

◆ rotateToHelicityBasis() [2/2]

◆ spNeutrino()

◆ spParentNeutrino()