Pythia7::TimeShowerHandler Class Reference

TimeShowerHandler is a wrapper around the internal Shower::TimeShower class to perform a space-like parton shower. More...

#include <TimeShowerHandler.h>

Inheritance diagram for Pythia7::TimeShowerHandler:

List of all members.

Public Member Functions

Shower::TimeShower * getModel ()

Set the static parameters of the underlying model object and return an instance.

int angularOrder () const

Angular ordering; = 0: off, = 1: on for g emission, = 2: on also for $g\rightarrow q \bar{q}$ splitting.

int nQuark () const

Number of allowed quark flavours in $g\rightarrow q \bar{q}$ branching.

int alphaSMode () const

Running of alpha_strong in evolution: = 0: fixed; = 1: scale $Q^2/4$ ; = 2: scale $p_\perp^2$ ; = 3: scale $p_\perp^2$ , except for $g\rightarrow q \bar{q}$ , where it is $Q^2/4$ .

int MEMode () const

Also allow a QED shower together with QCD ones: = 0: no; = 1: radiate on-shell photons; = 2 : also allow photons to branch.

int QEDShower () const

Also allow a QED shower together with QCD ones: = 0: no; = 1: radiate on-shell photons; = 2 : also allow photons to branch.

int initialCone () const

Restrict first emission within cone given by colour flow in hard process.

int phiPolAsym () const

Azimuthal asymmetry induced by gluon polarization.

int phoCoherAsym () const

Azimuthal asymmetry induced by colour coherence.

int respectScale () const

Use the scale variable of original partons to restrict branchings.

Energy Q0 () const

Parton shower cut-off mass for QCD emissions.

Energy Q0ChgQ () const

Parton shower cut-off mass for photon coupling to coloured particle.

Energy Q0ChgL () const

Parton shower cut-off mass for pure QED branchings.

double alphaSFix () const

Fixed alpha_strong value for AlphaSMode == 0.

Energy Lambda5 () const

$\Lambda_{\mbox{QCD}}$ (five flavours) in alpha_strong for AlphaSMode >= 1.

double alphaEMFix () const

Fixed $\alpha_{\mbox{EM}}$ value.

double Q0FracPS () const

Fraction of Q0 cut-off mass used as safety margin in daughter mass sum.

Standard constructors and destructors.

TimeShowerHandler ()

The default constructor.

TimeShowerHandler (const TimeShowerHandler &)

The copy constructor.

virtual ~TimeShowerHandler ()

The destructor.

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 ()

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.

Standard Interfaced functions.

virtual void doupdate () throw (UpdateException)

Check sanity of the object during the setup phase.

virtual void doinit () throw (InitException)

Initialize this object after the setup phase before saving an EventGenerator to disk.

virtual void doinitrun ()

Initialize this object.

virtual void dofinish ()

Finalize this object.

virtual void rebind (const TranslationMap &trans) throw (RebindException)

Rebind pointer to other Interfaced objects.

virtual IVector getReferences ()

Return a vector of all pointers to Interfaced objects used in this object.

Private Member Functions

TimeShowerHandler & operator= (const TimeShowerHandler &)

Private and non-existent assignment operator.

Private Attributes

Shower::TimeShower * theShowerModel

The object implementing the actual model.

int theAngularOrdering

Angular ordering; = 0: off, = 1: on for g emission, = 2: on also for g -> q qbar splitting.

int theNQuark

Number of allowed quark flavours in g -> q qbar branching.

int theAlphaSMode

Running of alpha_strong in evolution: = 0: fixed; = 1: scale Q^2/4; = 2: scale pT^2; = 3: scale pT2, except for g -> q qbar, where it is Q^2/4 .

int theMEMode

Also allow a QED shower together with QCD ones: = 0: no; = 1: radiate on-shell photons; = 2 : also allow photons to branch.

int theQEDShower

Also allow a QED shower together with QCD ones: = 0: no; = 1: radiate on-shell photons; = 2 : also allow photons to branch.

int theInitialCone

Restrict first emission within cone given by colour flow in hard process.

int thePhiPolAsym

Azimuthal asymmetry induced by gluon polarization.

int thePhiCoherAsym

Azimuthal asymmetry induced by colour coherence.

int theRespectScale

Use the scale variable of original partons to restrict branchings.

Energy theQ0

Parton shower cut-off mass for QCD emissions.

Energy theQ0ChgQ

Parton shower cut-off mass for photon coupling to coloured particle.

Energy theQ0ChgL

Parton shower cut-off mass for pure QED branchings.

double theAlphaSFix

Fixed alpha_strong value for AlphaSMode == 0.

Energy theLambda5

Lambda_QCD(five flavours) in alpha_strong for AlphaSMode >= 1.

double theAlphaEMFix

Fixed alpha_EM value.

double theQ0FracPS

Fraction of Q0 cut-off mass used as safety margin in daughter mass sum.

Static Private Attributes

static ClassDescription
< TimeShowerHandler > initTimeShowerHandler

Describe a concrete class with persistent data.

Detailed Description

TimeShowerHandler is a wrapper around the internal Shower::TimeShower class to perform a space-like parton shower.

See also:: The interfaces defined for TimeShowerHandler.

Definition at line 22 of file TimeShowerHandler.h.

Member Function Documentation

int Pythia7::TimeShowerHandler::initialCone ( ) const [inline]

Restrict first emission within cone given by colour flow in hard process.

= 0: no; = 1: yes, isotropic phi angle inside cone; = 2: yes, also with anisotropic phi angle inside cone.

int Pythia7::TimeShowerHandler::phiPolAsym ( ) const [inline]

Azimuthal asymmetry induced by gluon polarization.

= 0: no; = 1: yes.

int Pythia7::TimeShowerHandler::phoCoherAsym ( ) const [inline]

Azimuthal asymmetry induced by colour coherence.

= 0: no; = 1: yes.

int Pythia7::TimeShowerHandler::respectScale ( ) const [inline]

Use the scale variable of original partons to restrict branchings.

= 0: no; = 1: yes, $Q^2 <$ scale; = 2: yes, $p_\perp^2 <$ scale, = 3: yes, $(E\theta)^2 <$ scale; = 4: yes, $\theta^2 <$ scale. (In all cases relations are approximate.)

Energy Pythia7::TimeShowerHandler::Q0ChgL ( ) const [inline]

Parton shower cut-off mass for pure QED branchings.

Assumed <= Q0CHGQ.

double Pythia7::TimeShowerHandler::Q0FracPS ( ) const [inline]

Fraction of Q0 cut-off mass used as safety margin in daughter mass sum.

Relevant for total parton multiplicity.

void Pythia7::TimeShowerHandler::persistentOutput ( PersistentOStream & os ) const

Function used to write out object persistently.

Parameters:

os

the persistent output stream written to.

Reimplemented from ThePEG::Interfaced.

void Pythia7::TimeShowerHandler::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.

virtual IBPtr Pythia7::TimeShowerHandler::clone ( ) const [inline, protected, virtual]

Make a simple clone of this object.

Returns:: a pointer to the new object.

Implements ThePEG::InterfacedBase.

virtual IBPtr Pythia7::TimeShowerHandler::fullclone ( ) const [inline, 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.

virtual void Pythia7::TimeShowerHandler::doinit ( ) throw (InitException) [inline, protected, virtual]

Initialize this object after the setup phase before saving an EventGenerator to disk.

Exceptions:

InitException

if object could not be initialized properly.

Reimplemented from ThePEG::InterfacedBase.

virtual void Pythia7::TimeShowerHandler::doinitrun ( ) [inline, protected, virtual]

Initialize this object.

Called in the run phase just before a run begins.

Reimplemented from ThePEG::InterfacedBase.

virtual void Pythia7::TimeShowerHandler::dofinish ( ) [inline, protected, virtual]

Finalize this object.

Called in the run phase just after a run has ended. Used eg. to write out statistics.

Reimplemented from ThePEG::InterfacedBase.

virtual void Pythia7::TimeShowerHandler::rebind ( const TranslationMap & trans ) throw (RebindException) [inline, protected, virtual]

Rebind pointer to other Interfaced objects.

Called in the setup phase after all objects used in an EventGenerator has been cloned so that the pointers will refer to the cloned objects afterwards.

Parameters:

trans

a TranslationMap relating the original objects to their respective clones.

Exceptions:

RebindException

if no cloned object was found for a given pointer.

Reimplemented from ThePEG::InterfacedBase.

virtual IVector Pythia7::TimeShowerHandler::getReferences ( ) [inline, protected, virtual]

Return a vector of all pointers to Interfaced objects used in this object.

Returns:: a vector of pointers.

Reimplemented from ThePEG::InterfacedBase.

Member Data Documentation

int Pythia7::TimeShowerHandler::theInitialCone [private]

Restrict first emission within cone given by colour flow in hard process.

= 0: no; = 1: yes, isotropic phi angle inside cone; = 2: yes, also with anisotropic phi angle inside cone.

Definition at line 291 of file TimeShowerHandler.h.

int Pythia7::TimeShowerHandler::thePhiPolAsym [private]

Azimuthal asymmetry induced by gluon polarization.

= 0: no; = 1: yes.

Definition at line 298 of file TimeShowerHandler.h.

int Pythia7::TimeShowerHandler::thePhiCoherAsym [private]

Azimuthal asymmetry induced by colour coherence.

= 0: no; = 1: yes.

Definition at line 305 of file TimeShowerHandler.h.

int Pythia7::TimeShowerHandler::theRespectScale [private]

Use the scale variable of original partons to restrict branchings.

= 0: no; = 1: yes, the Q2 < scale; = 2: yes, the pT2 < scale, = 3: yes, the (E*theta)^2 < scale; = 4: yes, the theta^2 < scale. (In all cases relations are approximate.)

Definition at line 314 of file TimeShowerHandler.h.

Energy Pythia7::TimeShowerHandler::theQ0ChgL [private]

Parton shower cut-off mass for pure QED branchings.

Assumed <= Q0CHGQ.

Definition at line 332 of file TimeShowerHandler.h.

double Pythia7::TimeShowerHandler::theQ0FracPS [private]

Fraction of Q0 cut-off mass used as safety margin in daughter mass sum.

Relevant for total parton multiplicity.

Definition at line 357 of file TimeShowerHandler.h.

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

TimeShowerHandler.h


Public Member Functions
Shower::TimeShower *	getModel ()
	Set the static parameters of the underlying model object and return an instance.
int	angularOrder () const
	Angular ordering; = 0: off, = 1: on for g emission, = 2: on also for $g\rightarrow q \bar{q}$ splitting.
int	nQuark () const
	Number of allowed quark flavours in $g\rightarrow q \bar{q}$ branching.
int	alphaSMode () const
	Running of alpha_strong in evolution: = 0: fixed; = 1: scale ; = 2: scale $p_\perp^2$ ; = 3: scale $p_\perp^2$ , except for $g\rightarrow q \bar{q}$ , where it is .
int	MEMode () const
	Also allow a QED shower together with QCD ones: = 0: no; = 1: radiate on-shell photons; = 2 : also allow photons to branch.
int	QEDShower () const
	Also allow a QED shower together with QCD ones: = 0: no; = 1: radiate on-shell photons; = 2 : also allow photons to branch.
int	initialCone () const
	Restrict first emission within cone given by colour flow in hard process.
int	phiPolAsym () const
	Azimuthal asymmetry induced by gluon polarization.
int	phoCoherAsym () const
	Azimuthal asymmetry induced by colour coherence.
int	respectScale () const
	Use the scale variable of original partons to restrict branchings.
Energy	Q0 () const
	Parton shower cut-off mass for QCD emissions.
Energy	Q0ChgQ () const
	Parton shower cut-off mass for photon coupling to coloured particle.
Energy	Q0ChgL () const
	Parton shower cut-off mass for pure QED branchings.
double	alphaSFix () const
	Fixed alpha_strong value for AlphaSMode == 0.
Energy	Lambda5 () const
	$\Lambda_{\mbox{QCD}}$ (five flavours) in alpha_strong for AlphaSMode >= 1.
double	alphaEMFix () const
	Fixed $\alpha_{\mbox{EM}}$ value.
double	Q0FracPS () const
	Fraction of Q0 cut-off mass used as safety margin in daughter mass sum.
Standard constructors and destructors.
	TimeShowerHandler ()
	The default constructor.
	TimeShowerHandler (const TimeShowerHandler &)
	The copy constructor.
virtual	~TimeShowerHandler ()
	The destructor.
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 ()
	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.
Standard Interfaced functions.
virtual void	doupdate () throw (UpdateException)
	Check sanity of the object during the setup phase.
virtual void	doinit () throw (InitException)
	Initialize this object after the setup phase before saving an EventGenerator to disk.
virtual void	doinitrun ()
	Initialize this object.
virtual void	dofinish ()
	Finalize this object.
virtual void	rebind (const TranslationMap &trans) throw (RebindException)
	Rebind pointer to other Interfaced objects.
virtual IVector	getReferences ()
	Return a vector of all pointers to Interfaced objects used in this object.
Private Member Functions
TimeShowerHandler &	operator= (const TimeShowerHandler &)
	Private and non-existent assignment operator.
Private Attributes
Shower::TimeShower *	theShowerModel
	The object implementing the actual model.
int	theAngularOrdering
	Angular ordering; = 0: off, = 1: on for g emission, = 2: on also for g -> q qbar splitting.
int	theNQuark
	Number of allowed quark flavours in g -> q qbar branching.
int	theAlphaSMode
	Running of alpha_strong in evolution: = 0: fixed; = 1: scale Q^2/4; = 2: scale pT^2; = 3: scale pT2, except for g -> q qbar, where it is Q^2/4 .
int	theMEMode
	Also allow a QED shower together with QCD ones: = 0: no; = 1: radiate on-shell photons; = 2 : also allow photons to branch.
int	theQEDShower
	Also allow a QED shower together with QCD ones: = 0: no; = 1: radiate on-shell photons; = 2 : also allow photons to branch.
int	theInitialCone
	Restrict first emission within cone given by colour flow in hard process.
int	thePhiPolAsym
	Azimuthal asymmetry induced by gluon polarization.
int	thePhiCoherAsym
	Azimuthal asymmetry induced by colour coherence.
int	theRespectScale
	Use the scale variable of original partons to restrict branchings.
Energy	theQ0
	Parton shower cut-off mass for QCD emissions.
Energy	theQ0ChgQ
	Parton shower cut-off mass for photon coupling to coloured particle.
Energy	theQ0ChgL
	Parton shower cut-off mass for pure QED branchings.
double	theAlphaSFix
	Fixed alpha_strong value for AlphaSMode == 0.
Energy	theLambda5
	Lambda_QCD(five flavours) in alpha_strong for AlphaSMode >= 1.
double	theAlphaEMFix
	Fixed alpha_EM value.
double	theQ0FracPS
	Fraction of Q0 cut-off mass used as safety margin in daughter mass sum.
Static Private Attributes
static ClassDescription < TimeShowerHandler >	initTimeShowerHandler
	Describe a concrete class with persistent data.