BrancherRF base class for resonance-final antennae. More...

#include <VinciaFSR.h>

Inheritance diagram for BrancherRF:

Public Member Functions
	BrancherRF (int iSysIn, Event &event, bool sectorShowerIn, vector< int > allIn)
	Base class constructor = inherited from Brancher.

virtual void	initRF (Event &event, vector< int > allIn, unsigned int posResIn, unsigned int posFIn, double q2cut, ZetaGeneratorSet *zetaGenSet)=0
	RF branchers have a different initBrancher structure.

void	resetRF (int iSysIn, Event &event, vector< int > allIn, unsigned int posResIn, unsigned int posFIn, double q2cut, ZetaGeneratorSet *zetaGenSet)
	Reset the brancher.

int	iNew ()
	Setter methods that are common for all derived RF classes. More...

void	setMaps (int sizeOld)
	Method to make mothers2daughters and daughters2mothers pairs. More...

int	posR () const
	Return position of resonance and colour-connected final-state parton.

int	posF () const

double	getQ2Max (int evType)
	Return maximum Q2.

Public Member Functions inherited from Brancher
	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 ()

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 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.

Protected Member Functions
double	getsAK (double mA, double mK, double mAK)
	Protected helper methods for internal class use.

double	calcQ2Max (double mA, double mAK, double mK)

bool	vetoPhSpPoint (const vector< double > &invariants, int verboseIn)
	Veto point if outside available phase space. More...

Protected Attributes
unsigned int	posRes {}

unsigned int	posFinal {}

double	mRes {}
	Mass of resonance.

double	mFinal {}
	Mass of final state parton in antennae.

double	mRecoilers {}

double	sAK {}

double	q2MaxSav {}
	Max Q2 for this brancher, still an overestimate.

double	colFacSav {}

bool	colFlowRtoF {}

map< unsigned int, unsigned int >	posNewtoOld {}

Protected Attributes inherited from Brancher
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 {}

Additional Inherited Members
Public Attributes inherited from Brancher
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

Detailed Description

BrancherRF base class for resonance-final antennae.

Member Function Documentation

int iNew ( )

virtual

Setter methods that are common for all derived RF classes.

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

BrancherRF base class for storing information on antennae between a coloured resonance and final state parton.

Reimplemented from Brancher.

int posF ( ) const

inlinevirtual

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

Reimplemented from Brancher.

void setMaps ( int sizeOld )

virtual

Method to make mothers2daughters and daughters2mothers pairs.

For updating the children of existing parents. Save children of F (treat like 1->2 splitting).

Save recoilers and insert the new emission at position 1.

Reimplemented from Brancher.

bool vetoPhSpPoint	(	const vector< double > &	invariants,
		int	verboseIn
	)

protected

Veto point if outside available phase space.

Make copies of masses (just for compactness of notation).

Common sense: saj, sjk > 0. Not an error for splitters - mass effects can make negative and push outside generated phase space.

On-shell X condition.

On-shell j,k conditions.

When |cosTheta| < 1.

This condition may be sufficient to remove above conditions. TODO use gramdet here

Member Data Documentation

bool colFlowRtoF {}

protected

Store whether the colour flow is from R to F (e.g. t -> bW+) or F to R (e.g. tbar -> bbarW-).

double mRecoilers {}

protected

Collective mass of rest of downstream decay products of resonance these will just take recoil.

unsigned int posRes {}

protected

Save reference to position in vectors of resonance and colour connected parton.

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

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

Public Member Functions

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Member Function Documentation

Member Data Documentation