PhotosParticle Class Reference

Inheritance diagram for PhotosParticle:

Public Member Functions
bool	hasDaughters ()
	Return whether the particle has any chidren.
PhotosParticle *	findLastSelf ()
	Traverse the event structure and find the final version of this particle which does not have a particle of it's own type as it's daughter. More...
std::vector< PhotosParticle * >	findProductionMothers ()
	Traverse the event structure and find the first set of mothers which are not of the same type as this particle.
std::vector< PhotosParticle * >	getDecayTree ()
	Return whole decay tree starting from this particle.
void	boostToRestFrame (PhotosParticle *boost)
	Transform this particles four momentum from the lab frome into the rest frame of the paramter PhotosParticle.
void	boostDaughtersToRestFrame (PhotosParticle *boost)
	Transform the four momentum of all the daughters recursively into the frame of the "particle" PhotosParticle.
void	boostFromRestFrame (PhotosParticle *boost)
	Transform this particles four momentum from the rest frame of the paramter PhotosParticle, back into the lab frame.
void	boostDaughtersFromRestFrame (PhotosParticle *boost)
	Transform this particles four momentum from the lab frame to the rest frame of the parameter PhotosParticle.
void	boostAlongZ (double pz, double e)
	Do a Lorenz transformation along the Z axis. More...
void	rotate (int axis, double phi, int second_axis=Z_AXIS)
	rotate this particles 4-momentum by an angle phi from the axisis "axis" towards the axis "second_axis". More...
void	rotateDaughters (int axis, double phi, int second_axis=Z_AXIS)
	rotate 4-momentum of daughters of this particle by an angle phi from the axisis "axis" towards the axis "second_axis".
double	getRotationAngle (int axis, int second_axis=Z_AXIS)
	Returns the angle around the axis "axis" needed to rotate the four momenum is such a way that the non-Z component disappears and Z>0. More...
double	getP ()
	Get scalar momentum.
double	getP (int axis)
	Get momentum component in the direction of "axis" (x,y,z)
void	setP (int axis, double p_component)
	Set momentum component in the direction of "axis" (x,y,z)
virtual double	getVirtuality ()
	Get sqrt(e^2-p^2)
virtual bool	checkMomentumConservation ()=0
	check that the 4 momentum in conserved at the vertices producing and ending this particle
virtual double	getPx ()=0
	Returns the px component of the four vector.
virtual double	getPy ()=0
	Returns the py component of the four vector.
virtual double	getPz ()=0
	Returns the pz component of the four vector.
virtual double	getE ()=0
	Returns the energy component of the four vector.
virtual double	getMass ()=0
	Get the invariant mass from the event record.
virtual void	setPx (double px)=0
	Set the px component of the four vector.
virtual void	setPy (double py)=0
	Set the px component of the four vector.
virtual void	setPz (double pz)=0
	Set the pz component of the four vector.
virtual void	setE (double e)=0
	Set the energy component of the four vector.
virtual void	setMothers (std::vector< PhotosParticle * > mothers)=0
	Set the mothers of this particle via a vector of PhotosParticle.
virtual void	setDaughters (std::vector< PhotosParticle * > daughters)=0
	Set the daughters of this particle via a vector of PhotosParticle.
virtual void	addDaughter (PhotosParticle *daughter)=0
	Add a new daughter to this particle.
virtual std::vector< PhotosParticle * >	getMothers ()=0
	Returns the mothers of this particle via a vector of PhotosParticle.
virtual std::vector< PhotosParticle * >	getDaughters ()=0
	Returns the daughters of this particle via a vector of PhotosParticle.
virtual std::vector< PhotosParticle * >	getAllDecayProducts ()=0
	Returns all particles in the decay tree of this particle via a vector of PhotosParticle.
virtual void	setPdgID (int pdg_id)=0
	Set the PDG ID code of this particle.
virtual void	setMass (double mass)=0
	Set the mass of this particle.
virtual void	setStatus (int status)=0
	Set the status of this particle.
virtual int	getPdgID ()=0
	Get the PDG ID code of this particle.
virtual int	getStatus ()=0
	Get the status of this particle.
virtual int	getBarcode ()=0
	Get the barcode of this particle.
virtual PhotosParticle *	createNewParticle (int pdg_id, int status, double mass, double px, double py, double pz, double e)=0
	Create a new particle of the same type, with the given properties. More...
virtual void	createHistoryEntry ()=0
	Create history entry of this particle before modifications of PHOTOS. More...
virtual void	createSelfDecayVertex (PhotosParticle *out)=0
	Create a self-decay vertex for this particle with 'out' being the outgoing particle in new vertex.
virtual void	print ()=0
	Print some information about this particle to standard output.

Static Public Attributes
static const int	STABLE = 1
	Stable particle status.
static const int	DECAYED = 2
	Decayed particle status.
static const int	HISTORY = 3
	History particle status.
static const int	X_AXIS = 1
	X Axis.
static const int	Y_AXIS = 2
	Y Axis.
static const int	Z_AXIS = 3
	Z Axis.
static const int	Z0 = 23
	Z0 particle.
static const int	HIGGS = 25
	H particle.
static const int	HIGGS_H = 35
	H0 particle.
static const int	HIGGS_A = 36
	A0 particle.
static const int	HIGGS_PLUS = 37
	H+ particle.
static const int	HIGGS_MINUS = -37
	H- particle.
static const int	W_PLUS = 24
	W+ particle.
static const int	W_MINUS = -24
	W- particle.
static const int	GAMMA = 22
	photon
static const int	TAU_PLUS = -15
	tau+ particle
static const int	TAU_MINUS = 15
	tau- particle
static const int	TAU_NEUTRINO = 16
	tau neutrino particle
static const int	TAU_ANTINEUTRINO = -16
	tau antineutrino particle
static const int	MUON_PLUS = -13
	muon+ particle
static const int	MUON_MINUS = 13
	muon- particle
static const int	MUON_NEUTRINO = 14
	muon neutrino particle
static const int	MUON_ANTINEUTRINO = -14
	muon antineutrino particle
static const int	POSITRON = -11
	e+ particle
static const int	ELECTRON = 11
	e- particle
static const int	ELECTRON_NEUTRINO = 12
	e neutrino particle
static const int	ELECTRON_ANTINEUTRINO = -12
	e antineutrino particle
static const int	UP = 2
	up quark
static const int	ANTIUP = -2
	anti-up quark
static const int	DOWN = 1
	down quark
static const int	ANTIDOWN = -1
	anti-down quark
static const int	OTHER = 0
	All other particle types.

Detailed Description

Definition at line 24 of file PhotosParticle.h.

Member Function Documentation

boostAlongZ()

void boostAlongZ	(	double	boost_pz,
		double	boost_e
	)

Do a Lorenz transformation along the Z axis.

Boost this vector along the Z direction.

Assume no momentum components in the X or Y directions.

Definition at line 148 of file PhotosParticle.cc.

createHistoryEntry()

virtual void createHistoryEntry ( )

pure virtual

Create history entry of this particle before modifications of PHOTOS.

Implementation of this method depends strongly on the event record.

Implemented in PhotosHEPEVTParticle.

createNewParticle()

virtual PhotosParticle* createNewParticle ( int  pdg_id, int  status, double  mass, double  px, double  py, double  pz, double  e  )

pure virtual

Create a new particle of the same type, with the given properties.

The new particle bares no relations to this particle, but it provides a way of creating a intance of the derived class. eg. createNewParticle() is used inside filhep_() so that an eg. PhotosHepMCParticle is created without the method having explicit knowledge of the PhotosHepMCParticle class

Implemented in PhotosHEPEVTParticle.

findLastSelf()

PhotosParticle * findLastSelf

(

)

Traverse the event structure and find the final version of this particle which does not have a particle of it's own type as it's daughter.

eg. Generally the final stable copy

Definition at line 15 of file PhotosParticle.cc.

getRotationAngle()

double getRotationAngle	(	int	axis,
		int	second_axis = Z_AXIS
	)

Returns the angle around the axis "axis" needed to rotate the four momenum is such a way that the non-Z component disappears and Z>0.

Get the angle needed to rotate the 4 momentum vector so that the x (y) component disapears.

This is used to in rotating the coordinate system into a frame with only a Z component before calling boostAlongZ().

(and the Z component is > 0)

if(getP(axis)==0){ if(getPz()>0) return 0; //no rotaion required else return M_PI; }

Definition at line 129 of file PhotosParticle.cc.

rotate()

void rotate	(	int	axis,
		double	phi,
		int	second_axis = Z_AXIS
	)

rotate this particles 4-momentum by an angle phi from the axisis "axis" towards the axis "second_axis".

Rotation around an axis X or Y.

Definition at line 161 of file PhotosParticle.cc.

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

• generators/kkmc/photospp/PhotosParticle.h
• generators/kkmc/photospp/PhotosParticle.cc