A conversion trial function for initial-final, g -> qqbar. More...

#include <VinciaISR.h>

Inheritance diagram for TrialIFConvA:

Public Member Functions
virtual string	name () override
	Name of trial generator.

virtual double	aTrial (double saj, double sjk, double sAK) override
	A conversion trial function for IF (derived base class), g->qqbar. More...

virtual double	getQ2 (double saj, double sjk, double sAK) override
	Evolution scale.

virtual double	getQ2max (double sAK, double eA, double eBeamUsed) override

virtual double	genQ2run (double q2old, double sAK, double zMin, double zMax, double colFac, double PDFratio, double b0, double kR, double Lambda, double eA, double eK, double headroomFac=1.0, double enhanceFac=1.0) override
	Generate a new Q value, with first-order running alphaS. More...

virtual double	genQ2 (double q2old, double sAK, double zMin, double zMax, double colFac, double alphaSvalue, double PDFratio, double eA, double eK, double headroomFac=1.0, double enhanceFac=1.0) override
	Generate a new Q value, with constant trial alphaS. More...

virtual double	genZ (double zMin, double zMax) override
	Generate a new zeta value in [zMin,zMax].

virtual double	getIz (double zMin, double zMax) override
	The zeta integral.

virtual double	getZmin (double Qt2, double sAK, double eA, double eBeamUsed) override
	The zeta boundaries, for a given value of the evolution scale.

virtual double	getZmax (double Qt2, double sAK, double eA, double eBeamUsed) override

virtual double	getS1j (double Qt2, double zeta, double sAK) override
	Inverse transforms to obtain saj and sjk from Qt2 and zeta. More...

virtual double	getSj2 (double Qt2, double zeta, double sAK) override

virtual double	trialPDFratio (BeamParticle beamAPtr, BeamParticle beamBPtr, int iSys, int idA, int idK, double eA, double eK, double Qt2A, double Qt2B) override
	Trial PDF ratio. More...

Public Member Functions inherited from TrialGeneratorISR
	TrialGeneratorISR ()
	Constructor.

void	initPtr (Info *infoPtrIn)
	Initialize pointers. More...

virtual void	init (double mcIn, double mbIn)
	Initialize. More...

virtual double	genQ2thres (double q2old, double sAB, double zMin, double zMax, double colFac, double alphaSvalue, double PDFratio, int idA, int idB, double eA, double eB, bool useMpdf, double headroomFac=1.0, double enhanceFac=1.0)

virtual double	getTrialPDFratio ()
	Return last trial PDF ratio.

bool	checkInit ()
	Check initialization.

int	trialFlav ()
	Return the last trial flavor.

Additional Inherited Members
Protected Attributes inherited from TrialGeneratorISR
Info *	infoPtr {}
	Pointers.

Rndm *	rndmPtr {}

Settings *	settingsPtr {}

Logger *	loggerPtr {}

bool	useMevolSav
	Use m or pT evolution for collinear singularities.

double	shhSav
	s for hadron hadron.

int	trialFlavSav
	For conversion trial generators.

int	nGtoQISRSav

double	mbSav
	Masses.

double	mcSav

bool	sectorShower
	Doing a sector shower?

double	trialPDFratioSav
	Saved trial PDF ratio and trial tolerance.

double	TINYPDFtrial

Detailed Description

A conversion trial function for initial-final, g -> qqbar.

Member Function Documentation

double aTrial	(	double	saj,
		double	sjk,
		double	sAK
	)

overridevirtual

A conversion trial function for IF (derived base class), g->qqbar.

Trial antenna function. This trial currently uses the xf overestimate so no extra x-factor (but could be changed to use the f overestimate if many violations, and/or for valence flavours).

Trial antenna function.

Reimplemented from TrialGeneratorISR.

double genQ2	(	double	q2old,
		double	sAK,
		double	zMin,
		double	zMax,
		double	colFac,
		double	alphaSvalue,
		double	PDFratio,
		double	eA,
		double	eK,
		double	headroomFac = `1.0`,
		double	enhanceFac = `1.0`
	)

overridevirtual

Generate a new Q value, with constant trial alphaS.

Sanity checks.

Enhance factors < 1: do not modify trial probability

Generate new trial scale

Reimplemented from TrialGeneratorISR.

double genQ2run	(	double	q2old,
		double	sAK,
		double	zMin,
		double	zMax,
		double	colFac,
		double	PDFratio,
		double	b0,
		double	kR,
		double	Lambda,
		double	eA,
		double	eK,
		double	headroomFac = `1.0`,
		double	enhanceFac = `1.0`
	)

overridevirtual

Generate a new Q value, with first-order running alphaS.

Sanity checks.

Enhance factors < 1: do not modify trial probability.

Generate new trial scale.

Reimplemented from TrialGeneratorISR.

double getS1j	(	double	Qt2,
		double	zeta,
		double	sAK
	)

overridevirtual

Inverse transforms to obtain saj and sjk from Qt2 and zeta.

If zeta < 0, swap invariants.

Sanity check.

Reimplemented from TrialGeneratorISR.

double getSj2	(	double	Qt2,
		double	zeta,
		double	sAK
	)

overridevirtual

If zeta < 0, swap invariants.

Sanity check.

Reimplemented from TrialGeneratorISR.

double trialPDFratio	(	BeamParticle *	beamAPtr,
		BeamParticle *	beamBPtr,
		int	iSys,
		int	idA,
		int	idK,
		double	eA,
		double	eK,
		double	Qt2A,
		double	Qt2B
	)

overridevirtual

Trial PDF ratio.

Number of active flavours.

Old PDF.

Store trial PDF weights for later use to pick flavour.

Skip gluon.

PDF headroom and valence enhancement factor.

Pick trial flavour ID and store weight for that flavour, to be used in accept probability.

Return sum over all flavours, to be used as evolution coefficient.

Reimplemented from TrialGeneratorISR.

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

include/Pythia8/VinciaISR.h
src/VinciaISR.cc

Public Member Functions

Additional Inherited Members

Detailed Description

Member Function Documentation