Class for performing QED showers. More...

#include <VinciaQED.h>

Inheritance diagram for VinciaQED:

Public Member Functions
	VinciaQED ()
	Constructor.

void	initPtr (Info infoPtrIn, VinciaCommon vinComPtrIn) override
	Initialise pointers (called at construction time). More...

void	init (BeamParticle beamAPtrIn=0, BeamParticle beamBPtrIn=0) override
	Initialise settings for current run (called as part of Pythia::init()). More...

bool	prepare (int iSysIn, Event &event, bool isBelowHadIn) override
	Prepare to shower a system. More...

void	update (Event &event, int iSys) override
	Update QED shower system(s) each time something has changed in event. More...

virtual void	setVerbose (int verboseIn) override
	Set or change verbosity level, and propagate to QED systems.

void	clear (int iSys=-1) override
	Clear everything, or specific system.

double	q2Next (Event &event, double q2Start, double) override
	Generate a trial scale. More...

int	sysWin () override
	Return the system window.

bool	lastIsSplitting () override
	Information about last branching.

bool	lastIsInitial () override

bool	acceptTrial (Event &event) override
	Generate kinematics and check veto. More...

void	updateEvent (Event &event) override
	Update event after branching accepted. More...

void	updatePartonSystems (Event &event) override
	Update partonSystems after branching accepted. More...

double	q2minColoured () override
	Return scales.

double	q2min () override

unsigned int	nBranchers () override
	Getter for number of systems.

unsigned int	nResDec () override
	This module does not implement resonance decays.

Public Member Functions inherited from VinciaModule
	VinciaModule ()
	Default constructor.

virtual	~VinciaModule ()=default
	Default destructor.

virtual void	load ()
	Some early initialisation (needed for EW shower).

bool	isInit ()

virtual bool	polarise (vector< Particle > &)
	Select helicities for a system of particles.

virtual bool	lastIsResonanceDecay ()

Friends
class	VinciaFSR
	Friends for internal private members.

Additional Inherited Members
Public Attributes inherited from VinciaModule
BeamParticle *	beamAPtr {}
	Members.

BeamParticle *	beamBPtr {}

Info *	infoPtr {}

ParticleData *	particleDataPtr {}

Logger *	loggerPtr {}

PartonSystems *	partonSystemsPtr {}

Rndm *	rndmPtr {}

Settings *	settingsPtr {}

VinciaCommon *	vinComPtr {}

Protected Attributes inherited from VinciaModule
int	verbose

bool	isInitPtr

bool	isInitSav

Detailed Description

Class for performing QED showers.

Member Function Documentation

bool acceptTrial ( Event & event )

overridevirtual

Generate kinematics and check veto.

Check the veto.

Verbose output.

Delegate.

Done.

Implements VinciaModule.

void init	(	BeamParticle *	beamAPtrIn = `0`,
		BeamParticle *	beamBPtrIn = `0`
	)

overridevirtual

Initialise settings for current run (called as part of Pythia::init()).

Initialize settings for current run.

Verbose setting

Initialize alphaEM

Change Pythia settings, initialize, then change them back.

Get settings.

QED cutoff for coloured particles/hadronisation scale.

Set beam pointers.

Initialise the empty templates we use to make new QED shower systems.

All done.

Implements VinciaModule.

void initPtr	(	Info *	infoPtrIn,
		VinciaCommon *	vinComPtrIn
	)

overridevirtual

Initialise pointers (called at construction time).

Class for performing QED showers.

Initialize the pointers.

Initialise the empty templates we use to make new QED shower systems.

Done.

Implements VinciaModule.

bool prepare	(	int	iSysIn,
		Event &	event,
		bool	isBelowHadIn
	)

overridevirtual

Prepare to shower a system.

Check if QED is switched on for this system.

Verbose output

Above or below hadronisation scale.

If below hadronization scale or this is resonance system, clear information about any other systems.

Initialize windows for the hard system and the final after-beam-remnants system.

The cutoff scale is the lowest window boundary, then step up to q2Max successively by factor winStep

Special case: iSysIn = -1 implies below hadronisation scale. Collect all final-state particles into one new system. Note: this system will have sum(charge) != 0 if the sum of the beam charges is nonzero.

Loop over all particles in event rather than all parton systems since beam remnant partons not part of any partonSystem.

Safety checks for systems that should have been deleted.

Add and prepare new system for initial- and final-state photon emissions.

Add and prepare new system for final-state photon splittings.

Add and prepare new system for initial-state photon conversions.

Done.

Implements VinciaModule.

double q2Next	(	Event &	event,
		double	q2Start,
		double
	)

overridevirtual

Generate a trial scale.

Get a trial from every system.

Sanity check.

Verbose output.

Emissions.

Splittings (no point trying if starting scale is below electron mass).

Conversions.

Done.

Implements VinciaModule.

void update	(	Event &	event,
		int	iSys
	)

overridevirtual

Update QED shower system(s) each time something has changed in event.

Find index of the system.

Done.

Implements VinciaModule.

void updateEvent ( Event & event )

overridevirtual

Update event after branching accepted.

Update Event after QED shower branching.

Verbose output.

Delegate.

Done.

Implements VinciaModule.

void updatePartonSystems ( Event & event )

overridevirtual

Update partonSystems after branching accepted.

Update PartonSystems after QED shower branching.

Verbose output.

Delegate.

Done.

Implements VinciaModule.

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

include/Pythia8/VinciaQED.h
src/VinciaQED.cc

Public Member Functions

Friends

Additional Inherited Members

Detailed Description

Member Function Documentation