Resolution Class Reference

A simple class for containing evolution variable definitions. More...

#include <VinciaCommon.h>

Public Member Functions
void	initPtr (Settings *settingsPtrIn, Info *infoPtrIn, VinciaCommon *vinComPtrIn)
	Initialize pointers (must be done before init).
bool	init ()
	Initialize. More...
double	q2evol (VinciaClustering &clus)
	Method to calculate (and set) evolution variable. More...
double	xTevol (VinciaClustering &clus)
	Get dimensionless evolution variable. More...
double	q2sector (VinciaClustering &clus)
	Top-level function to calculate (and set) sector resolution. More...
VinciaClustering	findSector (vector< Particle > &state, map< int, int > flavsBorn)
VinciaClustering	findSector (vector< Particle > &state, int nqpMin=0, int ngMin=0)
VinciaClustering	getMinSector (vector< VinciaClustering > &clusterings)
	Find sector with minimal q2sector in list of clusterings. More...
bool	sectorVeto (double q2In, vector< Particle > &state, map< int, int > nFlavsBorn)
bool	sectorVeto (const VinciaClustering &clusMin, const VinciaClustering &clus)
	Check sector veto, given two clusterings. More...
void	setVerbose (int verboseIn)
	Set verbosity level.

Detailed Description

A simple class for containing evolution variable definitions.

Member Function Documentation

VinciaClustering findSector	(	vector< Particle > &	state,
		map< int, int >	nFlavsBorn
	)

Find sector with minimal resolution. Optionally resolve Born: avoid clusterings that would not lead to a specified (Born) configuration.

Top-level function to find sector with minimal resolution while resolving a Born configuration.

Get all clusterings.

Sanity check.

Return clustering with smallest resolution.

VinciaClustering findSector	(	vector< Particle > &	state,
		int	nqpMin = 0,
		int	ngMin = 0
	)

Find sector with minimal resolution. Optionally avoid sectors that cluster beyond a minimal number of quark pairs or gluons.

Top-level function to find sector with minimal resolution while retaining a minimal number of quark pairs and gluons.

Get all clusterings.

Return clustering with smallest resolution.

VinciaClustering getMinSector

(

vector< VinciaClustering > &

clusterings

)

Find sector with minimal q2sector in list of clusterings.

Set starting scale.

Loop over all clusterings and save one with minimal resolution.

bool init

(

)

Initialize.

The Resolution class.

Initialize.

Check that pointers initialized.

Set members.

double q2evol

(

VinciaClustering &

clus

)

Method to calculate (and set) evolution variable.

Method to calculate evolution variable for a given clustering.

2 -> 3 branchings.

Fetch invariants.

Fetch masses.

Final-Final configuration.

Initial-Final/Resonance-Final configuration.

Initial-Initial configuration.

Implement other branchings here.

double q2sector

(

VinciaClustering &

clus

)

Top-level function to calculate (and set) sector resolution.

Top-level function to calculate sector resolution for a given clustering.

2 -> 3 branchings.

Implement other branchings here.

bool sectorVeto ( double  q2In, vector< Particle > &  state, map< int, int >  nFlavsBorn  )

inline

Sector veto to check whether given value of resolution is minimal, given we want to preserve a certain Born configuration. Returns true = vetoed, and false = not vetoed.

bool sectorVeto	(	const VinciaClustering &	clusMin,
		const VinciaClustering &	clus
	)

Check sector veto, given two clusterings.

Sanity check: always veto if NANs.

Check resolution scales. Note: in principle, we could implement a random choice here, when the two scales are two close.

double xTevol

(

VinciaClustering &

clus

)

Get dimensionless evolution variable.

Method to calculate dimensionless evolution variable. Note: calls q2evol(), so will set dimensionful evolution variable in the VinciaClustering object.

Calculate dimensionful evolution variable first.

Get normalisation.

Norm is sIK.

Norm is saj+sak.

Norm is sab.

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

• include/Pythia8/VinciaCommon.h
• src/VinciaCommon.cc