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Herwig++  2.7.0
Herwig::MEChargedCurrentDIS Class Reference

The MEChargedCurrentDIS class provides the matrix elements for charged current DIS. More...

#include <MEChargedCurrentDIS.h>

Inheritance diagram for Herwig::MEChargedCurrentDIS:

List of all members.

Public Member Functions

 MEChargedCurrentDIS ()
 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 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 helicityME (vector< SpinorWaveFunction > &f1, vector< SpinorWaveFunction > &f2, vector< SpinorBarWaveFunction > &a1, vector< SpinorBarWaveFunction > &a2, bool lorder, bool qorder, bool me) const
 Matrix element for $\ell q\to \gamma/Z \to \ell q$.
virtual double A (tcPDPtr lin, tcPDPtr lout, tcPDPtr qin, tcPDPtr qout, Energy2 scale) const
 Calculate the coefficient A for the correlations in the hard radiation.
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

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

Private Attributes

AbstractFFVVertexPtr _theFFWVertex
 Pointer to the vertex for the helicity calculations.
unsigned int _maxflavour
 The allowed flavours of the incoming quarks.
unsigned int _massopt
 Option for the mass of the outgoing quarks.
ProductionMatrixElement _me
 Matrix element for spin correlations.
tcPDPtr _wp
 Pointers to the intermediates resonances.
tcPDPtr _wm
 Pointer to the $W^-$.

Static Private Attributes

static ClassDescription
< MEChargedCurrentDIS
initMEChargedCurrentDIS
 The static object used to initialize the description of this class.

Detailed Description

The MEChargedCurrentDIS class provides the matrix elements for charged current DIS.

By default both the incoming and outgong quarks are assumed to be massless although the mass of the outgoing quark can be included if required. This option should be used if top production is included.

See also:
The interfaces defined for MEChargedCurrentDIS.

Definition at line 29 of file MEChargedCurrentDIS.h.


Member Function Documentation

virtual IBPtr Herwig::MEChargedCurrentDIS::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 153 of file MEChargedCurrentDIS.h.

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.

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::MEChargedCurrentDIS::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 Herwig::DISBase.

virtual IBPtr Herwig::MEChargedCurrentDIS::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 159 of file MEChargedCurrentDIS.h.

double Herwig::MEChargedCurrentDIS::helicityME ( vector< SpinorWaveFunction > &  f1,
vector< SpinorWaveFunction > &  f2,
vector< SpinorBarWaveFunction > &  a1,
vector< SpinorBarWaveFunction > &  a2,
bool  lorder,
bool  qorder,
bool  me 
) const [protected]

Matrix element for $\ell q\to \gamma/Z \to \ell q$.

Parameters:
f1Fermion on lepton line
a1Anti-fermion on lepton line
f2Fermion on quark line
a2Anti-fermion on quark line
lorderThe order of particles on the lepton line
qorderThe order of particles on the quark line
meWhether or not to calculate the matrix element for spin correlations
static void Herwig::MEChargedCurrentDIS::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::DISBase.

virtual double Herwig::MEChargedCurrentDIS::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.

MEChargedCurrentDIS& Herwig::MEChargedCurrentDIS::operator= ( const MEChargedCurrentDIS ) [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::DISBase.

Function used to write out object persistently.

Parameters:
osthe persistent output stream written to.

Reimplemented from Herwig::DISBase.


Member Data Documentation

Pointers to the intermediates resonances.

Pointer to the $W^+$

Definition at line 217 of file MEChargedCurrentDIS.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 180 of file MEChargedCurrentDIS.h.


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