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Herwig++  2.7.0
Herwig::MEPP2SingleTop Class Reference

The MEPP2SingleTop class implements the matrix element for the production of a single top quark. More...

#include <MEPP2SingleTop.h>

Inheritance diagram for Herwig::MEPP2SingleTop:

List of all members.

Public Member Functions

 MEPP2SingleTop ()
 The default constructor.
Virtual functions required by the MEBase class.
virtual unsigned int orderInAlphaS () const
 Return the order in $\alpha_S$ in which this matrix element is given.
virtual unsigned int orderInAlphaEW () const
 Return the order in $\alpha_{EW}$ in which this matrix element is given.
virtual double me2 () const
 The matrix element for the kinematical configuration previously provided by the last call to setKinematics(), suitably scaled by sHat() to give a dimension-less number.
virtual Energy2 scale () const
 Return the scale associated with the last set phase space point.
virtual void getDiagrams () const
 Add all possible diagrams with the add() function.
virtual Selector< DiagramIndexdiagrams (const DiagramVector &dv) const
 Get diagram selector.
virtual Selector< const
ColourLines * > 
colourGeometries (tcDiagPtr diag) const
 Return a Selector with possible colour geometries for the selected diagram weighted by their relative probabilities.
virtual void constructVertex (tSubProPtr)
 Construct the vertex of spin correlations.
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

double sChannelME (vector< SpinorWaveFunction > &fin, vector< SpinorBarWaveFunction > &ain, vector< SpinorBarWaveFunction > &fout, vector< SpinorWaveFunction > &aout, bool me) const
 Matrix Elements ofr the different processes.
double tChannelME (vector< SpinorWaveFunction > &f1, vector< SpinorBarWaveFunction > &a1, vector< SpinorWaveFunction > &f2, vector< SpinorBarWaveFunction > &a2, bool me) const
 Matrix element for $qq\to t q$.
double tWME (vector< SpinorWaveFunction > &fin, vector< VectorWaveFunction > &gin, vector< SpinorBarWaveFunction > &fout, vector< VectorWaveFunction > &Wout, bool me) const
 Matrix element for $qg\to t W$.
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 doinit ()
 Initialize this object after the setup phase before saving an EventGenerator to disk.

Private Member Functions

MEPP2SingleTopoperator= (const MEPP2SingleTop &)
 The assignment operator is private and must never be called.

Private Attributes

unsigned int process_
 Which processes to include.
int maxflavour_
 Allowed flavours of the incoming quarks.
int topOption_
 Treatment of the top quark mass.
int wOption_
 Treatment of the W mass.
ProductionMatrixElement me_
 The matrix element.
AbstractFFVVertexPtr FFWvertex_
 Vertices.
AbstractFFVVertexPtr FFGvertex_
 FFGVertex.

Static Private Attributes

static ClassDescription
< MEPP2SingleTop
initMEPP2SingleTop
 The static object used to initialize the description of this class.

Detailed Description

The MEPP2SingleTop class implements the matrix element for the production of a single top quark.

See also:
The interfaces defined for MEPP2SingleTop.

Definition at line 23 of file MEPP2SingleTop.h.


Member Function Documentation

virtual IBPtr Herwig::MEPP2SingleTop::clone ( ) const [protected, virtual]

Make a simple clone of this object.

Returns:
a pointer to the new object.

Implements ThePEG::InterfacedBase.

virtual Selector<const ColourLines *> Herwig::MEPP2SingleTop::colourGeometries ( tcDiagPtr  diag) const [virtual]

Return a Selector with possible colour geometries for the selected diagram weighted by their relative probabilities.

Parameters:
diagthe diagram chosen.
Returns:
the possible colour geometries weighted by their relative probabilities.

Implements ThePEG::MEBase.

virtual Selector<DiagramIndex> Herwig::MEPP2SingleTop::diagrams ( const DiagramVector dv) const [virtual]

Get diagram selector.

With the information previously supplied with the setKinematics method, a derived class may optionally override this method to weight the given diagrams with their (although certainly not physical) relative probabilities.

Parameters:
dvthe diagrams to be weighted.
Returns:
a Selector relating the given diagrams to their weights.

Reimplemented from ThePEG::MEBase.

virtual void Herwig::MEPP2SingleTop::doinit ( ) [protected, virtual]

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

Exceptions:
InitExceptionif object could not be initialized properly.

Reimplemented from ThePEG::InterfacedBase.

virtual IBPtr Herwig::MEPP2SingleTop::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.

static void Herwig::MEPP2SingleTop::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::HwMEBase.

virtual double Herwig::MEPP2SingleTop::me2 ( ) const [virtual]

The matrix element for the kinematical configuration previously provided by the last call to setKinematics(), suitably scaled by sHat() to give a dimension-less number.

Returns:
the matrix element scaled with sHat() to give a dimensionless number.

Implements ThePEG::MEBase.

MEPP2SingleTop& Herwig::MEPP2SingleTop::operator= ( const MEPP2SingleTop ) [private]

The assignment operator is private and must never be called.

In fact, it should not even be implemented.

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::HwMEBase.

Function used to write out object persistently.

Parameters:
osthe persistent output stream written to.

Reimplemented from Herwig::HwMEBase.

double Herwig::MEPP2SingleTop::sChannelME ( vector< SpinorWaveFunction > &  fin,
vector< SpinorBarWaveFunction > &  ain,
vector< SpinorBarWaveFunction > &  fout,
vector< SpinorWaveFunction > &  aout,
bool  me 
) const [protected]

Matrix Elements ofr the different processes.

Matrix element for $q\bar{q}\to W \to t\bar{f}$.

Parameters:
finSpinors for incoming quark
ainSpinors for incoming antiquark
foutSpinors for incoming quark
aoutSpinors for incoming antiquark
meWhether or not to calculate the matrix element for spin correlations
double Herwig::MEPP2SingleTop::tChannelME ( vector< SpinorWaveFunction > &  f1,
vector< SpinorBarWaveFunction > &  a1,
vector< SpinorWaveFunction > &  f2,
vector< SpinorBarWaveFunction > &  a2,
bool  me 
) const [protected]

Matrix element for $qq\to t q$.

Parameters:
f1Spinors for incoming quark
a1Spinors for incoming antiquark
f2Spinors for incoming quark
a2Spinors for incoming antiquark
meWhether or not to calculate the matrix element for spin correlations
double Herwig::MEPP2SingleTop::tWME ( vector< SpinorWaveFunction > &  fin,
vector< VectorWaveFunction > &  gin,
vector< SpinorBarWaveFunction > &  fout,
vector< VectorWaveFunction > &  Wout,
bool  me 
) const [protected]

Matrix element for $qg\to t W$.

Parameters:
finSpinors for incoming quark
ginPolarization vectors for the incoming gluon
foutSpinors for outgoing quark
WoutPolarization vectors for the outgoing W
meWhether or not to calculate the matrix element for spin correlations

Member Data Documentation

Vertices.

FFWVertex

Definition at line 218 of file MEPP2SingleTop.h.

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

Indicates that this is a concrete class with persistent data.

Definition at line 201 of file MEPP2SingleTop.h.


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