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Herwig++  2.7.0
RadiativeZPrime::MEqq2ZPrime2ZGamma Class Reference

The MEqq2ZPrime2ZGamma class implements the matrix element for $q\bar{q}\to Z'\to Z\gamma$. More...

#include <MEqq2ZPrime2ZGamma.h>

Inheritance diagram for RadiativeZPrime::MEqq2ZPrime2ZGamma:

List of all members.

Public Member Functions

 MEqq2ZPrime2ZGamma ()
 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 qqME (vector< SpinorWaveFunction > &fin, vector< SpinorBarWaveFunction > &ain, vector< VectorWaveFunction > &Zout, vector< VectorWaveFunction > &gammaout, bool me) const
 Matrix element for $q\bar{q}\to \gamma/Z \to f\bar{f}$.
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

MEqq2ZPrime2ZGammaoperator= (const MEqq2ZPrime2ZGamma &)
 The assignment operator is private and must never be called.

Private Attributes

tcPDPtr _zPrime
 Pointer to the $Z'$ ParticleData object.
ProductionMatrixElement _me
 Matrix element for spin correlations.
AbstractFFVVertexPtr _theFFZPrimeVertex
 Pointer to the vertices for the helicity calculations.
AbstractVVVVertexPtr _theGammaZPrimeZVertex
 Pointer to the $\gamma Z' Z vertex$.
unsigned int _maxflavour
 Switches to control the particles in the hard process.

Static Private Attributes

static ClassDescription
< MEqq2ZPrime2ZGamma
initMEqq2ZPrime2ZGamma
 The static object used to initialize the description of this class.

Detailed Description

The MEqq2ZPrime2ZGamma class implements the matrix element for $q\bar{q}\to Z'\to Z\gamma$.

See also:
The interfaces defined for MEqq2ZPrime2ZGamma.

Definition at line 28 of file MEqq2ZPrime2ZGamma.h.


Member Function Documentation

virtual IBPtr RadiativeZPrime::MEqq2ZPrime2ZGamma::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 131 of file MEqq2ZPrime2ZGamma.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 RadiativeZPrime::MEqq2ZPrime2ZGamma::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 RadiativeZPrime::MEqq2ZPrime2ZGamma::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 137 of file MEqq2ZPrime2ZGamma.h.

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 RadiativeZPrime::MEqq2ZPrime2ZGamma::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.

MEqq2ZPrime2ZGamma& RadiativeZPrime::MEqq2ZPrime2ZGamma::operator= ( const MEqq2ZPrime2ZGamma ) [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 RadiativeZPrime::MEqq2ZPrime2ZGamma::qqME ( vector< SpinorWaveFunction > &  fin,
vector< SpinorBarWaveFunction > &  ain,
vector< VectorWaveFunction > &  Zout,
vector< VectorWaveFunction > &  gammaout,
bool  me 
) const [protected]

Matrix element for $q\bar{q}\to \gamma/Z \to f\bar{f}$.

Parameters:
finSpinors for incoming quark
ainSpinors for incoming antiquark
ZoutPolarization vectors for outgoing Z
gammaoutPolarization vectors for the the outgoing photon
meWhether or not to calculate the matrix element for spin correlations

Member Data Documentation

Switches to control the particles in the hard process.

Allowed flavours for the incoming quarks

Definition at line 211 of file MEqq2ZPrime2ZGamma.h.

Pointer to the vertices for the helicity calculations.

Pointer to the $Z'$ vertex

Definition at line 191 of file MEqq2ZPrime2ZGamma.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 174 of file MEqq2ZPrime2ZGamma.h.


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