ThePEG::KTClus Class Reference

This clas implements the cuts relevant for the $\Delta R$ -measure in the longitudinally invariant kt-algorithm. More...

#include <KTClus.h>

Inheritance diagram for ThePEG::KTClus:

List of all members.

Public Member Functions

virtual void describe () const

Describe the currently active cuts in the log file.

Standard constructors and destructors.

KTClus ()

The default constructor.

Overridden virtual functions defined in the base class.

virtual Energy minKTClus (tcPDPtr pi, tcPDPtr pj) const

Return the minimum allowed value of the longitudinally invariant $k_\perp$ -algorithms distance measure.

virtual Energy2 minSij (tcPDPtr pi, tcPDPtr pj) const

Return the minimum allowed squared invariant mass of two outgoing partons of type pi and pj.

virtual Energy2 minTij (tcPDPtr pi, tcPDPtr po) const

Return the minimum allowed value of the negative of the squared invariant mass of an incoming parton of type pi and an outgoing parton of type po.

virtual double minDeltaR (tcPDPtr pi, tcPDPtr pj) const

Return the minimum allowed value of $\Delta R_{ij}=\sqrt{\Delta\eta_{ij}^2+\Delta\phi_{ij}^2}$ of two outgoing partons of type pi and pj.

virtual double minDurham (tcPDPtr pi, tcPDPtr pj) const

Return the minimum allowed value of the Durham $k_\perp$ -algorithms distance measure.

virtual bool passCuts (tcCutsPtr parent, tcPDPtr pitype, tcPDPtr pjtype, LorentzMomentum pi, LorentzMomentum pj, bool inci=false, bool incj=false) const

Return true if a pair of particles with type pitype and pjtype and momenta pi and pj respectively passes the cuts.

Functions used by the persistent I/O system.

void persistentOutput (PersistentOStream &os) const

Function used to write out object persistently.

void persistentInput (PersistentIStream &is, int version)

Function used to read in object persistently.

Static Public Member Functions

static void Init ()

The standard Init function used to initialize the interfaces.

Protected Member Functions

Clone Methods.

virtual IBPtr clone () const

Make a simple clone of this object.

virtual IBPtr fullclone () const

Make a clone of this object, possibly modifying the cloned object to make it sane.

Private Member Functions

KTClus & operator= (const KTClus &)

The assignment operator is private and must never be called.

Private Attributes

Energy theCut

The minimum allowed value of the longitudinally invariant $k_\perp$ -algorithms distance measure.

bool onlyJets

If true, only apply the cut to pairs of coloured particles.

Static Private Attributes

static ClassDescription< KTClus > initKTClus

The static object used to initialize the description of this class.

Detailed Description

This clas implements the cuts relevant for the $\Delta R$ -measure in the longitudinally invariant kt-algorithm.

By default the cut is only applied to coloured particles, but optionally it may be applied to all particle types.

See also:: The interfaces defined for KTClus.

Definition at line 28 of file KTClus.h.

Member Function Documentation

virtual Energy ThePEG::KTClus::minKTClus	(	tcPDPtr	pi,
		tcPDPtr	pj
	)			const `[virtual]`

Return the minimum allowed value of the longitudinally invariant $k_\perp$ -algorithms distance measure.

This is defined as $\min(p_{\perp i}, p_{\perp j})\sqrt{\Delta\eta_{ij}^2+\Delta\phi_{ij}^2}$ for two outgoing partons, or simply $p_{\perp i}$ or $p_{\perp j}$ for a single outgoing parton. Returns 0 if both partons are incoming. A null pointer indicates an incoming parton, hence the type of the incoming parton is irrelevant.

Implements ThePEG::TwoCutBase.

virtual Energy2 ThePEG::KTClus::minSij	(	tcPDPtr	pi,
		tcPDPtr	pj
	)			const `[virtual]`

Return the minimum allowed squared invariant mass of two outgoing partons of type pi and pj.

Returns zero.

Implements ThePEG::TwoCutBase.

virtual Energy2 ThePEG::KTClus::minTij	(	tcPDPtr	pi,
		tcPDPtr	po
	)			const `[virtual]`

Return the minimum allowed value of the negative of the squared invariant mass of an incoming parton of type pi and an outgoing parton of type po.

Returns zero.

Implements ThePEG::TwoCutBase.

virtual double ThePEG::KTClus::minDeltaR	(	tcPDPtr	pi,
		tcPDPtr	pj
	)			const `[virtual]`

Return the minimum allowed value of $\Delta R_{ij}=\sqrt{\Delta\eta_{ij}^2+\Delta\phi_{ij}^2}$ of two outgoing partons of type pi and pj.

Returns zero.

Implements ThePEG::TwoCutBase.

virtual double ThePEG::KTClus::minDurham	(	tcPDPtr	pi,
		tcPDPtr	pj
	)			const `[virtual]`

Return the minimum allowed value of the Durham $k_\perp$ -algorithms distance measure.

This is defined as $2\min(E_j^2, E_j^2)(1-\cos\theta_{ij})/\hat{s}$ for two outgoing partons. Returns zero.

Implements ThePEG::TwoCutBase.

virtual bool ThePEG::KTClus::passCuts	(	tcCutsPtr	parent,
		tcPDPtr	pitype,
		tcPDPtr	pjtype,
		LorentzMomentum	pi,
		LorentzMomentum	pj,
		bool	inci = `false`,
		bool	incj = `false`
	)			const `[virtual]`

Return true if a pair of particles with type pitype and pjtype and momenta pi and pj respectively passes the cuts.

inci and inj indicates if the corresponding particles are incoming.

Reimplemented from ThePEG::TwoCutBase.

void ThePEG::KTClus::persistentOutput ( PersistentOStream & os ) const

Function used to write out object persistently.

Parameters:

os

the persistent output stream written to.

Reimplemented from ThePEG::Interfaced.

void ThePEG::KTClus::persistentInput	(	PersistentIStream &	is,
		int	version
	)

Function used to read in object persistently.

Parameters:

	is	the persistent input stream read from.
	version	the version number of the object when written.

Reimplemented from ThePEG::Interfaced.

static void ThePEG::KTClus::Init ( ) [static]

The standard Init function used to initialize the interfaces.

Called exactly once for each class by the class description system before the main function starts or when this class is dynamically loaded.

Reimplemented from ThePEG::TwoCutBase.

virtual IBPtr ThePEG::KTClus::clone ( ) const [protected, virtual]

Make a simple clone of this object.

Returns:: a pointer to the new object.

Implements ThePEG::InterfacedBase.

virtual IBPtr ThePEG::KTClus::fullclone ( ) const [protected, virtual]

Make a clone of this object, possibly modifying the cloned object to make it sane.

Returns:: a pointer to the new object.

Reimplemented from ThePEG::InterfacedBase.

KTClus& ThePEG::KTClus::operator= ( const KTClus & ) [private]

The assignment operator is private and must never be called.

In fact, it should not even be implemented.

Member Data Documentation

ClassDescription<KTClus> ThePEG::KTClus::initKTClus [static, private]

The static object used to initialize the description of this class.

Indicates that this is a concrete class with persistent data.

Definition at line 162 of file KTClus.h.

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

KTClus.h


Public Member Functions
virtual void	describe () const
	Describe the currently active cuts in the log file.
Standard constructors and destructors.
	KTClus ()
	The default constructor.
Overridden virtual functions defined in the base class.
virtual Energy	minKTClus (tcPDPtr pi, tcPDPtr pj) const
	Return the minimum allowed value of the longitudinally invariant $k_\perp$ -algorithms distance measure.
virtual Energy2	minSij (tcPDPtr pi, tcPDPtr pj) const
	Return the minimum allowed squared invariant mass of two outgoing partons of type pi and pj.
virtual Energy2	minTij (tcPDPtr pi, tcPDPtr po) const
	Return the minimum allowed value of the negative of the squared invariant mass of an incoming parton of type pi and an outgoing parton of type po.
virtual double	minDeltaR (tcPDPtr pi, tcPDPtr pj) const
	Return the minimum allowed value of $\Delta R_{ij}=\sqrt{\Delta\eta_{ij}^2+\Delta\phi_{ij}^2}$ of two outgoing partons of type pi and pj.
virtual double	minDurham (tcPDPtr pi, tcPDPtr pj) const
	Return the minimum allowed value of the Durham $k_\perp$ -algorithms distance measure.
virtual bool	passCuts (tcCutsPtr parent, tcPDPtr pitype, tcPDPtr pjtype, LorentzMomentum pi, LorentzMomentum pj, bool inci=false, bool incj=false) const
	Return true if a pair of particles with type pitype and pjtype and momenta pi and pj respectively passes the cuts.
Functions used by the persistent I/O system.
void	persistentOutput (PersistentOStream &os) const
	Function used to write out object persistently.
void	persistentInput (PersistentIStream &is, int version)
	Function used to read in object persistently.
Static Public Member Functions
static void	Init ()
	The standard Init function used to initialize the interfaces.
Protected Member Functions
Clone Methods.
virtual IBPtr	clone () const
	Make a simple clone of this object.
virtual IBPtr	fullclone () const
	Make a clone of this object, possibly modifying the cloned object to make it sane.
Private Member Functions
KTClus &	operator= (const KTClus &)
	The assignment operator is private and must never be called.
Private Attributes
Energy	theCut
	The minimum allowed value of the longitudinally invariant $k_\perp$ -algorithms distance measure.
bool	onlyJets
	If true, only apply the cut to pairs of coloured particles.
Static Private Attributes
static ClassDescription< KTClus >	initKTClus
	The static object used to initialize the description of this class.