#include <VinciaFSR.h>

Inheritance diagram for Brancher:

Public Member Functions
	Brancher (int iSysIn, Event &event, bool sectorShowerIn, vector< int > iIn)
	Main base class constructor.

	Brancher (int iSysIn, Event &event, bool sectorShowerIn, int iIn0, int iIn1, int iIn2=0)
	Wrapper for 2- and 3-parton parents.

virtual	~Brancher ()
	Base class must have a virtual destructor.

void	reset (int iSysIn, Event &event, vector< int > iIn)
	Reset (common functionality implemented in base class). More...

void	reset (int iSysIn, Event &event, int i0In, int i1In, int i2In=0)
	Wrapper for simple 2- (or 3-) parton antennae.

int	i0 () const
	Methods to get (explicit for up to 3 parents, otherwise just use iVec).

int	i1 () const

int	i2 () const

int	iVec (unsigned int i) const

vector< int >	iVec ()

int	id0 () const

int	id1 () const

int	id2 () const

vector< int >	idVec () const

int	colType0 () const

int	colType1 () const

int	colType2 () const

vector< int >	colTypeVec () const

int	col0 () const

int	col1 () const

int	col2 () const

vector< int >	colVec () const

int	acol0 () const

int	acol1 () const

int	acol2 () const

vector< int >	acolVec () const

int	h0 () const

int	h1 () const

int	h2 () const

vector< int >	hVec () const

double	m0 () const

double	m1 () const

double	m2 () const

vector< double >	mVec () const

vector< double >	getmPostVec ()

int	colTag ()

virtual double	getQ2Max (int)=0

int	system () const
	Methods to return saved/derived quantities.

double	mAnt () const

double	m2Ant () const

double	sAnt () const

double	kallenFac () const

double	enhanceFac () const

double	q2Trial () const

enum AntFunType	antFunTypePhys () const

virtual double	genQ2 (int evTypeIn, double q2MaxNow, Rndm rndmPtr, Logger loggerPtr, const EvolutionWindow *evWindowPtrIn, double colFac, vector< double > headroomIn, vector< double > enhanceFacIn, int verboseIn)=0
	Generate a new Q2 scale.

virtual bool	genInvariants (vector< double > &invariants, Rndm , int, Logger )

virtual double	pAccept (const double, Logger *, int=0)

virtual double	getpTscale ()
	Compute pT scale of trial branching.

virtual double	getXj ()
	Return Xj.

virtual int	idNew () const

virtual double	mNew () const

virtual bool	getNewParticles (Event &event, vector< Vec4 > momIn, vector< int > hIn, vector< Particle > &pNew, Rndm rndmPtr, VinciaColour colourPtr)=0
	Return new particles, must be implemented by derived class.

virtual void	list (string header="none", bool withLegend=true) const
	Simple print utility, showing the contents of the Brancher. More...

virtual void	setidPost ()
	Set post-branching IDs and masses. Base class is for gluon emission.

virtual vector< double >	setmPostVec ()

virtual void	setStatPost ()

virtual void	setMaps (int)

virtual int	iNew ()
	Return index of new particle (slightly arbitrary choice for splittings).

virtual int	posR () const

virtual int	posF () const

virtual int	getSector ()
	Return sector label.

enum BranchType	getBranchType ()
	Return branch type.

bool	isSwapped ()
	Check if swapped.

vector< double >	getInvariants ()
	Return the saved invariants.

void	resetEnhanceFac (const double enhanceIn)
	This method allows to reset enhanceFac if we do an accept/reject.

bool	hasTrial () const

void	needsNewTrial ()
	Method to mark new trial needed without erasing current one.

void	eraseTrial ()
	Method to mark new trial needed and erase current one.

Public Attributes
shared_ptr< TrialGenerator >	trialGenPtr = {}
	Object to perform trial generation.

map< int, pair< int, int > >	mothers2daughters
	Publicly accessible members for storing mother/daughter connections.

map< int, pair< int, int > >	daughters2mothers

Protected Attributes
int	systemSav {}
	Data members for storing information about parent partons.

vector< int >	iSav

vector< int >	idSav

vector< int >	colTypeSav

vector< int >	hSav

vector< int >	colSav

vector< int >	acolSav

vector< int >	idPostSav

vector< int >	statPostSav

vector< double >	mSav

vector< double >	mPostSav

int	colTagSav {}

int	evTypeSav {}

const EvolutionWindow *	evWindowSav {}
	All alphaS information.

double	mAntSav {}
	Saved antenna mass parameters.

double	m2AntSav {}

double	kallenFacSav {}

double	sAntSav {}

bool	hasTrialSav {false}
	Data members for storing information about generated trial branching.

double	headroomSav {1.}

double	enhanceSav {1.}

double	q2BegSav {}

double	q2NewSav {}

vector< double >	invariantsSav

bool	swapped {false}
	If true, flip identities of A and B.

bool	sectorShower {}
	Parameters for the sector shower.

int	iSectorWinner {}

Detailed Description

The Brancher class, base class containing a generic set of "parent partons" as well as virtual methods for generating trial branchings.

Member Function Documentation

virtual bool genInvariants	(	vector< double > &	invariants,
		Rndm *	,
		int	,
		Logger *
	)

inlinevirtual

Generate complementary invariant(s) for saved trial. Return false if no physical kinematics possible. Base class returns false.

Reimplemented in BrancherEmitRF, BrancherSplitFF, and BrancherEmitFF.

virtual double getQ2Max ( int )

pure virtual

Method to get maximum value of evolution scale for this brancher. Must be redefined in base classes.

Implemented in BrancherRF, BrancherSplitFF, and BrancherEmitFF.

bool hasTrial ( ) const

inline

Method to see if a saved trial has been generated, and to erase memory of it.

virtual int idNew ( ) const

inlinevirtual

What kind of particle(s) are being created, e.g. return 21 for gluon emission, quark flavour for splitting, etc.

Reimplemented in BrancherSplitFF, and BrancherEmitFF.

void list	(	string	header = `"none"`,
		bool	withLegend = `true`
	)		const

virtual

Simple print utility, showing the contents of the Brancher.

Simple print utility, showing the contents of the Brancher. Base class implementation allows for up to three explicit parents.

Check if we are asked to output a header.

Mothers in iSav list. Baseline 2->3 but also allow for 3->4. (Set up for right-justified printing.)

Resonance-Final antennae R and F mothers + list of recoilers.

virtual double pAccept	(	const double	,
		Logger *	,
		int	= `0`
	)

inlinevirtual

Compute antPhys/antTrial, given an input value for antPhys. Base class returns 0.

Reimplemented in BrancherEmitRF, BrancherSplitFF, and BrancherEmitFF.

virtual int posF ( ) const

inlinevirtual

Method returns pos of colour-connected daughter to resonance if there is one participating in decay, -1 otherwise.

Reimplemented in BrancherRF.

virtual int posR ( ) const

inlinevirtual

Method returns pos of resonance if there is one participating in decay, -1 otherwise.

Reimplemented in BrancherRF.

void reset	(	int	iSysIn,
		Event &	event,
		vector< int >	iIn
	)

Reset (common functionality implemented in base class).

Reset.

The Brancher class, base class containing a generic set of "parent partons" as well as virtual methods for generating trial branchings.

Save info on parents and resize vectors.

Compute and store antenna invariant mass.

Massless parents: sIK = m2IK and kallenFac = 1.0.

Mass corrections to sAnt and kallenFac.

sIK = m2IK - m2I - m2K.

Phase-space correction non-unity if both parents massive. Note, so far only defined for 2-parton systems.

vector< double > setmPostVec ( )

virtual

mi

mj

mk

Reimplemented in BrancherSplitRF, BrancherEmitRF, and BrancherSplitFF.

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

include/Pythia8/VinciaFSR.h
src/VinciaFSR.cc

Public Member Functions

Public Attributes

Protected Attributes

Detailed Description

Member Function Documentation