Class inheriting from SplittingQCD class. More...

#include <DireSplittingsQCD.h>

Inheritance diagram for Dire_isr_qcd_Q2qQqbarDist:

Public Member Functions
	Dire_isr_qcd_Q2qQqbarDist (string idIn, int softRS, Settings settings, ParticleData particleData, Rndm rndm, BeamParticle beamA, BeamParticle beamB, CoupSM coupSM, Info info, DireInfo direInfo)

bool	canRadiate (const Event &, pair< int, int >, unordered_map< string, bool >=unordered_map< string, bool >(), Settings =NULL, PartonSystems =NULL, BeamParticle *=NULL)
	Class inheriting from SplittingQCD class. More...

bool	canRadiate (const Event &, int iRadBef, int iRecBef, Settings =NULL, PartonSystems =NULL, BeamParticle *=NULL)

int	nEmissions ()

bool	isPartial ()

int	kinMap ()

int	motherID (int idDaughter)
	Return id of mother after splitting.

int	sisterID (int idDaughter)
	Return id of emission.

int	radBefID (int idRadAfter, int idEmtAfter)
	Return id of recombined radiator (before splitting!)

pair< int, int >	radBefCols (int colRadAfter, int acolRadAfter, int colEmtAfter, int acolEmtAfter)
	Return colours of recombined radiator (before splitting!)

double	gaugeFactor (int=0, int=0)
	Return color factor for splitting.

double	symmetryFactor (int=0, int=0)
	Return symmetry factor for splitting.

double	zSplit (double zMinAbs, double zMaxAbs, double m2dip)
	Pick z for new splitting. More...

double	overestimateInt (double zMinAbs, double zMaxAbs, double pT2Old, double m2dip, int order=-1)
	New overestimates, z-integrated versions. More...

double	overestimateDiff (double z, double m2dip, int order=-1)
	Return kernel for new splitting. More...

bool	calc (const Event &state=Event(), int order=-1)
	Functions to calculate the kernel from SplitInfo information. More...

Public Member Functions inherited from DireSplittingQCD
	DireSplittingQCD (string idIn, int softRS, Settings settings, ParticleData particleData, Rndm rndm, BeamParticle beamA, BeamParticle beamB, CoupSM coupSM, Info info, DireInfo direInfo)
	Constructor and destructor.

void	init ()

double	getNF (double pT2)
	AUXILIARY FUNCTIONS. More...

double	GammaQCD2 (double NF=5.)

double	GammaQCD3 (double NF=5.)

double	betaQCD0 (double NF=5.)

double	betaQCD1 (double NF=5.)

double	betaQCD2 (double NF=5.)

double	as2Pi (double pT2, int orderNow=-1, double renormMultFacNow=-1.)

double	softRescaleInt (int order)

double	softRescaleDiff (int order, double pT2, double renormMultFacNow=-1.)

double	beta0Endpoint (int order, double m2dip, double pT2, double z, double renormMultFacNow=-1.)

double	polevl (double x, double *coef, int N)
	Helper function to calculate dilogarithm.

double	DiLog (double x)
	Function to calculate dilogarithm.

vector< int >	sharedColor (const Event &event, int iRad, int iRec)

bool	hasSharedColor (const Event &event, int iRad, int iRec)

int	findCol (int col, vector< int > iExc, const Event &, int type)

bool	useFastFunctions ()

virtual vector< int >	radAndEmt (int idDaughter, int)

virtual int	couplingType (int, int)

virtual double	coupling (double z, double pT2, double m2dip, double renormMultFacNow=-1., pair< int, bool > radBef=pair< int, bool >(), pair< int, bool > recBef=pair< int, bool >())

virtual double	couplingScale2 (double z, double pT2, double m2dip, pair< int, bool > radBef, pair< int, bool > recBef)

virtual double	getJacobian (const Event &=Event(), PartonSystems *partonSystems=0)

virtual unordered_map< string, double >	getPhasespaceVars (const Event &=Event(), PartonSystems *=0)

double	sCoef (int powz)

double	sExp (int powz)

double	kCoef (int powz)

double	kExp (int powz)

double	cCoef (int powz)

double	cExp (int powz)

double	fCoef ()

bool	hasMECBef (const Event &state, double pT2)

bool	hasMECAft (const Event &state, double pT2)

Public Member Functions inherited from DireSplitting
	DireSplitting ()
	Constructor and destructor.

	DireSplitting (string idIn, int softRS, Settings settings, ParticleData particleData, Rndm rndm, BeamParticle beamA, BeamParticle beamB, CoupSM coupSMPtrIn, Info infoPtrIn, DireInfo direInfo)

void	init ()
	The Splitting class.

bool	is (ulong pattern)

string	name ()

virtual bool	aboveCutoff (double, const Particle &, const Particle &, int, PartonSystems *=NULL)
	Discard below the cut-off for the splitting.

virtual vector< pair< int, int > >	radAndEmtCols (int, int, Event)

virtual bool	canUseForBranching ()

virtual bool	swapRadEmt ()

virtual bool	isSymmetric (const Particle =NULL, const Particle =NULL)

virtual vector< int >	recPositions (const Event &, int, int)

virtual double	getKernel (string="")
	Functions to store and retrieve all the variants of the kernel.

virtual unordered_map< string, double >	getKernelVals ()

virtual void	clearKernels ()

void	setTimesPtr (shared_ptr< DireTimes > fsrIn)

void	setTimesDecPtr (shared_ptr< DireTimes > fsrIn)

void	setSpacePtr (shared_ptr< DireSpace > isrIn)

virtual bool	allow_z_endpoint_for_kinematics ()
	Treatment of additional virtual corrections.

virtual bool	allow_pT2_endpoint_for_kinematics ()

virtual bool	allow_sai_endpoint_for_kinematics ()

virtual bool	allow_xa_endpoint_for_kinematics ()

virtual void	try_z_endpoint ()
	Functions to set if kernel should contribute to a kinematical endpoint.

virtual void	try_pT2_endpoint ()

virtual void	try_sai_endpoint ()

virtual void	try_xa_endpoint ()

virtual bool	is_z_endpoint ()
	Return endpoint information.

virtual bool	is_pT2_endpoint ()

virtual bool	is_sai_endpoint ()

virtual bool	is_xa_endpoint ()

virtual double	tdire_ff (double, double t, double)
	Functions to calculate Dire variables from the evolution variables.

virtual double	zdire_ff (double z, double, double)

virtual double	tdire_fi (double, double t, double)

virtual double	zdire_fi (double z, double, double)

virtual double	tdire_if (double, double t, double)

virtual double	zdire_if (double z, double, double)

virtual double	tdire_ii (double, double t, double)

virtual double	zdire_ii (double z, double, double)

virtual void	storeOverhead (double pT2, double x, int radid, int nf, double val)

virtual double	overhead (double pT2, int idd, int nf)

Additional Inherited Members
Public Attributes inherited from DireSplittingQCD
double	CA
	VARIABLES.

double	TR

double	CF

double	pTmin

double	pT2minVariations

int	NF_qcd_fsr

int	orderSave

bool	usePDFalphas

bool	doVariations

bool	doCorrelations

bool	doMECs

double	alphaSorder

double	alphaS2pi

AlphaStrong	alphaS

int	asSchemeISR

int	asSchemeFSR

bool	useBackboneGluons

bool	doGeneralizedKernel

Public Attributes inherited from DireSplitting
double	renormMultFac

string	id

int	correctionOrder

Settings *	settingsPtr

ParticleData *	particleDataPtr

Rndm *	rndmPtr

BeamParticle *	beamAPtr

BeamParticle *	beamBPtr

CoupSM *	coupSMPtr

Info *	infoPtr

DireInfo *	direInfoPtr

bool	is_qcd
	Some short-cuts and string hashes to help avoid string comparisons.

bool	is_qed

bool	is_ewk

bool	is_fsr

bool	is_isr

bool	is_dire

ulong	nameHash

unordered_map< string, double >	kernelVals

DireSplitInfo	splitInfo

shared_ptr< DireSpace >	isr

shared_ptr< DireTimes >	fsr

shared_ptr< DireTimes >	fsrDec

multimap< double, OverheadInfo >	overhead_map

Static Public Attributes inherited from DireSplittingQCD
static const double	SMALL_TEVOL = 2.0
	The SplittingQCD class.

Detailed Description

Class inheriting from SplittingQCD class.

Member Function Documentation

bool calc	(	const Event &	state = `Event()`,
		int	order = `-1`
	)

virtual

Functions to calculate the kernel from SplitInfo information.

Return kernel for new splitting.

Dummy statement to avoid compiler warnings.

Read all splitting variables.

Do nothing without other NLO kernels!

Choose if simulating endpoint or differential 1->3 (latter containing both sai=0 and sai !=0). For choice of endpoint, set sai=0 later.

Get invariants.

Use only massless for now!

Discard splitting if not in allowed phase space.

Calculate kernel.

From xa integration volume?

Multiply by 2 since we randomly chose endpoint or fully differential.

Weight of sai-selection?

From xa integration volume?

Multiply by 2 since we randomly chose endpoint or fully differential.

Weight of sai-selection?

Remember that this might be an endpoint with vanishing sai.

Calculate argument of alphaS.

Insert value of kernel into kernel list.

Create muR-variations.

Multiply with z1 because of crossing.

Store higher order correction separately.

Store kernel values.

Reimplemented from DireSplitting.

bool canRadiate	(	const Event &	state,
		pair< int, int >	ints,
		unordered_map< string, bool >	= `unordered_map<string,bool>()`,
		Settings *	= `NULL`,
		PartonSystems *	= `NULL`,
		BeamParticle *	= `NULL`
	)

virtual

Class inheriting from SplittingQCD class.

SplittingQCD function Q->QG (ISR) Return true if this kernel should partake in the evolution.

Reimplemented from DireSplitting.

int kinMap ( )

virtual

Function to return an identifier for the phase space mapping that is used for setting up this splitting. return values: 1 –> Default Dire mapping. 2 –> Dire 1->3 mapping.

Reimplemented from DireSplitting.

double overestimateDiff	(	double	z,
		double	m2dip,
		int	order = `-1`
	)

virtual

Return kernel for new splitting.

Return overestimate for new splitting.

Do nothing without other NLO kernels!

Overestimate chosen to have accept weights below one for kappa~0.1

Conversions to light flavours can have very large PDF ratios at threshold. Thus, choose large overstimate a priori.

Reimplemented from DireSplitting.

double overestimateInt	(	double	zMinAbs,
		double	zMaxAbs,
		double	pT2Old,
		double	m2dip,
		int	order = `-1`
	)

virtual

New overestimates, z-integrated versions.

Do nothing without other NLO kernels!

Overestimate chosen to have accept weights below one for kappa~0.1 z est from 1/(z + kappa^2)

Conversions to light flavours can have very large PDF ratios at threshold. Thus, choose large overstimate a priori.

This splitting is down by one power of alphaS !

Reimplemented from DireSplitting.

double zSplit	(	double	zMinAbs,
		double	zMaxAbs,
		double	m2dip
	)

virtual

Pick z for new splitting.

z est from 1/(z + kappa^2)

Conversions to light flavours can have very large PDF ratios at threshold. Thus, choose large overstimate a priori.

Reimplemented from DireSplitting.

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

include/Pythia8/DireSplittingsQCD.h
src/DireSplittingsQCD.cc

Public Member Functions

Additional Inherited Members

Detailed Description

Member Function Documentation