ThePEG::TwoCutBase Class Reference

This class corresponds to a kinematical cut to be made on a pair of particles in a hard sub-process. More...

#include <TwoCutBase.h>

Inheritance diagram for ThePEG::TwoCutBase:

List of all members.

Public Member Functions

virtual void describe () const

Describe the currently active cuts in the log file.

Standard constructors and destructors.

TwoCutBase ()

The default constructor.

virtual ~TwoCutBase ()

The destructor.

Virtual functions to be overridden by sub-classes.

virtual Energy2 minSij (tcPDPtr pi, tcPDPtr pj) const =0

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

virtual Energy2 minTij (tcPDPtr pi, tcPDPtr po) const =0

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 =0

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 Energy minKTClus (tcPDPtr pi, tcPDPtr pj) const =0

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

virtual double minDurham (tcPDPtr pi, tcPDPtr pj) const =0

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.

bool passCuts (tcCutsPtr parent, tcPPtr pi, tcPPtr pj, bool inci=false, bool incj=false) const

Return true if the given pair of particles passes the cuts.

Static Public Member Functions

static void Init ()

The standard Init function used to initialize the interfaces.

Private Member Functions

TwoCutBase & operator= (const TwoCutBase &)

The assignment operator is private and must never be called.

Static Private Attributes

static
AbstractNoPIOClassDescription
< TwoCutBase > initTwoCutBase

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

Detailed Description

This class corresponds to a kinematical cut to be made on a pair of particles in a hard sub-process.

There are six main virtual functions to be overridden by concrete sub-classes. minsSij(), minTij(), minDeltaR(), minKTClus() and minDurham() returns the minimum allowed values of pre defined kinematical variable. In addition the passCut() function should return true if a pair of particle with a given types and given momenta will pass the cuts.

See also:: The interfaces defined for TwoCutBase.

Definition at line 35 of file TwoCutBase.h.

Member Function Documentation

virtual Energy ThePEG::TwoCutBase::minKTClus	(	tcPDPtr	pi,
		tcPDPtr	pj
	)			const `[pure 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.

Implemented in ThePEG::KTClus, ThePEG::SimpleDISCut, and ThePEG::MadGraphTwoCut.

virtual double ThePEG::TwoCutBase::minDurham	(	tcPDPtr	pi,
		tcPDPtr	pj
	)			const `[pure 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.

Implemented in ThePEG::KTClus, ThePEG::SimpleDISCut, and ThePEG::MadGraphTwoCut.

virtual bool ThePEG::TwoCutBase::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 in ThePEG::KTClus, ThePEG::SimpleDISCut, and ThePEG::MadGraphTwoCut.

bool ThePEG::TwoCutBase::passCuts	(	tcCutsPtr	parent,
		tcPPtr	pi,
		tcPPtr	pj,
		bool	inci = `false`,
		bool	incj = `false`
	)			const

Return true if the given pair of particles passes the cuts.

inci and inj indicates if the corresponding particles are incoming.

static void ThePEG::TwoCutBase::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::Interfaced.

Reimplemented in ThePEG::KTClus, ThePEG::SimpleDISCut, and ThePEG::MadGraphTwoCut.

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

The assignment operator is private and must never be called.

In fact, it should not even be implemented.

Member Data Documentation

AbstractNoPIOClassDescription<TwoCutBase> ThePEG::TwoCutBase::initTwoCutBase [static, private]

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

Indicates that this is an abstract class with persistent data.

Definition at line 136 of file TwoCutBase.h.

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

TwoCutBase.h


Public Member Functions
virtual void	describe () const
	Describe the currently active cuts in the log file.
Standard constructors and destructors.
	TwoCutBase ()
	The default constructor.
virtual	~TwoCutBase ()
	The destructor.
Virtual functions to be overridden by sub-classes.
virtual Energy2	minSij (tcPDPtr pi, tcPDPtr pj) const =0
	Return the minimum allowed squared invariant mass of two outgoing partons of type pi and pj.
virtual Energy2	minTij (tcPDPtr pi, tcPDPtr po) const =0
	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 =0
	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 Energy	minKTClus (tcPDPtr pi, tcPDPtr pj) const =0
	Return the minimum allowed value of the longitudinally invariant $k_\perp$ -algorithms distance measure.
virtual double	minDurham (tcPDPtr pi, tcPDPtr pj) const =0
	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.
bool	passCuts (tcCutsPtr parent, tcPPtr pi, tcPPtr pj, bool inci=false, bool incj=false) const
	Return true if the given pair of particles passes the cuts.
Static Public Member Functions
static void	Init ()
	The standard Init function used to initialize the interfaces.
Private Member Functions
TwoCutBase &	operator= (const TwoCutBase &)
	The assignment operator is private and must never be called.
Static Private Attributes
static AbstractNoPIOClassDescription < TwoCutBase >	initTwoCutBase
	The static object used to initialize the description of this class.