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Herwig++  2.7.0
Herwig::QTildeFinder Class Reference

The QTildeFinder class is responsible for finding the partners and setting the initial evolution scales for the shower evolution described in JHEP 0312:045,2003. More...

#include <QTildeFinder.h>

Inheritance diagram for Herwig::QTildeFinder:

List of all members.

Public Member Functions

 QTildeFinder ()
 The default constructor.
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

virtual pair< Energy, Energy > calculateFinalFinalScales (const ShowerPPair &)
 Given a pair of particles, supposedly partners w.r.t.
virtual pair< Energy, Energy > calculateInitialInitialScales (const ShowerPPair &)
 Calculate the initial evolution scales for two initial-state particles.
virtual pair< Energy, Energy > calculateInitialFinalScales (const ShowerPPair &, const bool isDecayCase)
 Calculate the initial evolution scales for one initial and one final-state particles.
unsigned int finalFinalConditions () const
 Access function for the initial conditions for the shower.
unsigned int initialFinalDecayConditions () const
 Initial conditions for the shower of an initial-final decay colour connection.
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

QTildeFinderoperator= (const QTildeFinder &)
 The assignment operator is private and must never be called.

Private Attributes

unsigned int _finalFinalConditions
 Flags controlling the initial conditions for the shower.
unsigned int _initialFinalDecayConditions
 Initial conditions for the shower with an initial-final decay colour connection.
unsigned int _initialInitialConditions
 Initial conditions for the shower with an initial-initial colour connection.

Detailed Description

The QTildeFinder class is responsible for finding the partners and setting the initial evolution scales for the shower evolution described in JHEP 0312:045,2003.

See also:
The interfaces defined for QTildeFinder.

Definition at line 31 of file QTildeFinder.h.


Member Function Documentation

virtual pair<Energy,Energy> Herwig::QTildeFinder::calculateFinalFinalScales ( const ShowerPPair ) [protected, virtual]

Given a pair of particles, supposedly partners w.r.t.

an interaction, this method returns their initial evolution scales as a pair. If something wrong happens, it returns the null (ZERO,ZERO) pair. This method is used by the above setXXXInitialEvolutionScales methods. Calculate the initial evolution scales for two final-state particles

Implements Herwig::PartnerFinder.

virtual IBPtr Herwig::QTildeFinder::clone ( ) const [inline, protected, virtual]

Make a simple clone of this object.

Returns:
a pointer to the new object.

Implements ThePEG::InterfacedBase.

Definition at line 126 of file QTildeFinder.h.

unsigned int Herwig::QTildeFinder::finalFinalConditions ( ) const [inline, protected]

Access function for the initial conditions for the shower.

Initial conditions for the shower of a final-final colour connection

  • 0 is the symmetric choice
  • 1 is maximal emmision from the coloured particle
  • 2 is maximal emmision from the anticoloured particle
  • 3 is randomly selected maximal emmision

Definition at line 105 of file QTildeFinder.h.

virtual IBPtr Herwig::QTildeFinder::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.

Definition at line 132 of file QTildeFinder.h.

static void Herwig::QTildeFinder::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 Herwig::PartnerFinder.

unsigned int Herwig::QTildeFinder::initialFinalDecayConditions ( ) const [inline, protected]

Initial conditions for the shower of an initial-final decay colour connection.

  • 0 is the symmetric choice
  • 1 is maximal emission from the decay product
  • 2 is the smooth choice

Definition at line 114 of file QTildeFinder.h.

QTildeFinder& Herwig::QTildeFinder::operator= ( const QTildeFinder ) [private]

The assignment operator is private and must never be called.

In fact, it should not even be implemented.

void Herwig::QTildeFinder::persistentInput ( PersistentIStream is,
int  version 
)

Function used to read in object persistently.

Parameters:
isthe persistent input stream read from.
versionthe version number of the object when written.

Reimplemented from Herwig::PartnerFinder.

Function used to write out object persistently.

Parameters:
osthe persistent output stream written to.

Reimplemented from Herwig::PartnerFinder.


Member Data Documentation

Flags controlling the initial conditions for the shower.

Initial conditions for the shower with a final-final colour connection

Definition at line 153 of file QTildeFinder.h.

Initial conditions for the shower with an initial-final decay colour connection.

This is done according to the top decay colour connection calculation in JHEP12(2003)_045. The options act as follows: 0: This is the default 'symmetric' choice which more or less divides the phase space evenly between the parent and its charged child. 1: This 'maximal' choice maximises the phase space available for gluons emitted from the charged child. 2: This (experimental) 'smooth' choice does not suffer from a discontinuity at the boundary between the region populated by emissions from the charged child and the region populated by emissions from the parent. This does, however, mean that the phase space available for emissions from the charged child is fairly minimal.

Definition at line 169 of file QTildeFinder.h.

Initial conditions for the shower with an initial-initial colour connection.

This is done according to the colour connection calculation in JHEP12(2003)_045. The options act as follows: 0: This is the default 'symmetric' choice which more or less divides the phase space evenly between the two incoming partons. 1: This increases the phase space for emission from "parton b". 2: This increases the phase space for emission from "parton c".

Definition at line 180 of file QTildeFinder.h.


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