KLFitter::Permutations Class Reference

A class permuting jets, electrons, muons and photons. More...

#include <Permutations.h>

Public Member Functions
Constructors and destructors
	Permutations (KLFitter::Particles **p, KLFitter::Particles **pp)
	The default constructor. More...
	Permutations (const Permutations &o)
	The (defaulted) copy constructor.
	~Permutations ()
	The (defaulted) destructor.
Permutations &	operator= (const Permutations &obj)
	The (defaulted) assignment operator.
Member functions (Get)
KLFitter::Particles *	Particles ()
	Return the original particles. More...
KLFitter::Particles *	ParticlesPermuted ()
	Return the current permutation of jets and leptons. More...
std::vector< std::vector< int > > *	PermutationTable ()
	Return the permutation table. More...
int	NPermutations ()
	Return the number of permutations.
int	PermutationIndex ()
	Return the current permutation index. More...
std::vector< std::vector< int > > *	TablePartons ()
std::vector< std::vector< int > > *	TableElectrons ()
std::vector< std::vector< int > > *	TableMuons ()
std::vector< std::vector< int > > *	TablePhotons ()
std::vector< std::vector< int > > *	TableTracks ()
Member functions (Set)
int	SetParticles (KLFitter::Particles *particles)
	Set the original particles. More...
int	SetPermutation (int index)
	Set the permutation. More...
Member functions (misc)
int	CreatePermutations (int nPartonsInPermutations=-1)
	Create all possible permutations of jets and leptons. More...
int	InvariantParticlePermutations (KLFitter::Particles::ParticleType ptype, std::vector< int > indexVector)
	Remove permutations in which all indices in the vector indexVector are exchanged for the given particle type. More...
int	InvariantParticleGroupPermutations (KLFitter::Particles::ParticleType ptype, std::vector< int > indexVectorPosition1, std::vector< int > indexVectorPosition2)
	Remove permutations in which all indices in the vector indexVectorPosition1 are exchanged with the corresponding indices in indexVectorPosition2 for the given particle type. More...
int	RemoveParticlePermutations (KLFitter::Particles::ParticleType ptype, int index, int position)
	Remove permutations in which a certain particles is in a certain position. More...
int	Reset ()
	Reset Permutations. More...
int	CreateSubTable (int Nobj, std::vector< std::vector< int > > *table, int Nmax=-1)
	Creates table of permutations.

Detailed Description

A class permuting jets, electrons, muons and photons.

The class gets a pointer to the orignal set of particles and a pointer to the currently used permutations. It can calculate all permutations and created a table. The pointer of the current permutation is set to the entry in the table.

Constructor & Destructor Documentation

KLFitter::Permutations::Permutations	(	KLFitter::Particles **	p,
		KLFitter::Particles **	pp
	)

The default constructor.

Parameters

p	A pointer to the pointer to the original set of particles.
pp	A pointer to the pointer to the permutated set of particles.

Member Function Documentation

int KLFitter::Permutations::CreatePermutations

(

int

nPartonsInPermutations = -1

)

Create all possible permutations of jets and leptons.

However, make permutations with exactly nPartonsInPermutations.

int KLFitter::Permutations::InvariantParticleGroupPermutations	(	KLFitter::Particles::ParticleType	ptype,
		std::vector< int >	indexVectorPosition1,
		std::vector< int >	indexVectorPosition2
	)

Remove permutations in which all indices in the vector indexVectorPosition1 are exchanged with the corresponding indices in indexVectorPosition2 for the given particle type.

This is useful to reduce the number of permutations if interchanging a whole set of particles doesn't have any effect, e.g., the particles coming from the two hadronic top quarks in the fully hadronic channel.

Parameters

ptype	The type of the particle.
indexVectorPosition1	Vector of indices of first set of particle.
indexVectorPosition2	Vector of corresponding indices for second set of particle.

Returns

An error code.

int KLFitter::Permutations::InvariantParticlePermutations	(	KLFitter::Particles::ParticleType	ptype,
		std::vector< int >	indexVector
	)

Remove permutations in which all indices in the vector indexVector are exchanged for the given particle type.

This is useful to reduce the number of permutations if interchanging for example jets doesn't have any effect, e.g., if two jets come from a W (top).

Parameters

ptype	The type of the particle.
indexVector	Vector of indices.

Returns

An error code.

KLFitter::Particles* KLFitter::Permutations::Particles ( )

inline

Return the original particles.

Returns

A pointer to the particles.

KLFitter::Particles* KLFitter::Permutations::ParticlesPermuted ( )

inline

Return the current permutation of jets and leptons.

Returns

A pointer to the permuted particles.

int KLFitter::Permutations::PermutationIndex ( )

inline

Return the current permutation index.

Returns

The current permutation index.

std::vector< std::vector< int > > * KLFitter::Permutations::PermutationTable

(

)

Return the permutation table.

Returns

A pointer to the permutation table.

int KLFitter::Permutations::RemoveParticlePermutations	(	KLFitter::Particles::ParticleType	ptype,
		int	index,
		int	position
	)

Remove permutations in which a certain particles is in a certain position.

This is useful to reduce the number of permutations if for example a b-tagged jet is forbidden in the position of a light jet.

Parameters

ptype	The type of the particle.
index	The index of the particle.
position	The position in which it is forbidden.

Returns

An error code.

int KLFitter::Permutations::Reset

(

)

Reset Permutations.

Returns

An error code.

int KLFitter::Permutations::SetParticles

(

KLFitter::Particles *

particles

)

Set the original particles.

Parameters

particles

A set of particles.

Returns

An error code.

int KLFitter::Permutations::SetPermutation

(

int

index

)

Set the permutation.

Parameters

index

The permutation index.

Returns

An error code.

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

• include/KLFitter/Permutations.h
• src/Permutations.cxx