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Herwig++  2.7.0
Herwig::MEHiggsPair Class Reference

The MEHiggsPair class implements the matrix elements for HiggsPairian $2\to2$ scattering process. More...

#include <MEHiggsPair.h>

Inheritance diagram for Herwig::MEHiggsPair:

List of all members.

Public Member Functions

 MEHiggsPair ()
 The default constructor.
virtual void setKinematics ()
 Set the typed and momenta of the incoming and outgoing partons to be used in subsequent calls to me() and colourGeometries() according to the associated XComb object.
virtual int nDim () const
 The number of internal degrees of freedom used in the matrix element.
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 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 bool generateKinematics (const double *r)
 Generate internal degrees of freedom.
virtual CrossSection dSigHatDR () const
 Return the matrix element squared differential in the variables given by the last call to generateKinematics().
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 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.
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

PDPtr higgs () const
 Access to the higgs data.
void higgs (PDPtr in)
 Set the higgs data.
Standard Interfaced functions.
virtual void doinit ()
 Initialize this object after the setup phase before saving an EventGenerator to disk.
virtual void rebind (const TranslationMap &trans)
 Rebind pointer to other Interfaced objects.
virtual IVector getReferences ()
 Return a vector of all pointers to Interfaced objects used in this object.
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.

Helper functions for me2.

static ClassDescription
< MEHiggsPair
initMEHiggsPair
 The static object used to initialize the description of this class.
PDPtr _higgs
 The higgs boson.
Energy _topmass
Energy _bottommass
Energy _zmass
Energy _m1
Energy _m2
Energy _heavyHmass
Energy _heavyHwidth
GenericMassGeneratorPtr _hmass
 The mass generator for the Higgs.
double _selfcoupling
 multiplier for the SM triple-coupling
double _hhHcoupling
 multiplier for the hhH triple-coupling
unsigned int _process
 Processes to include.
Energy _mh
 On-shell mass for the higgs.
Energy _wh
 On-shell width for the higgs.
MEHiggsPairoperator= (const MEHiggsPair &)
 The assignment operator is private and must never be called.
virtual vector< Complexiniscal (double AMQ, double S, double T, double U, double M1, double M2) const
virtual double MATRIX (double S, double T, double U, double M1, double M2) const

Detailed Description

The MEHiggsPair class implements the matrix elements for HiggsPairian $2\to2$ scattering process.

Definition at line 63 of file MEHiggsPair.h.


Member Function Documentation

virtual IBPtr Herwig::MEHiggsPair::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::MEHiggsPair::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::MEHiggsPair::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::MEHiggsPair::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::MEHiggsPair::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.

virtual IVector Herwig::MEHiggsPair::getReferences ( ) [protected, virtual]

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

Returns:
a vector of pointers.

Reimplemented from ThePEG::InterfacedBase.

static void Herwig::MEHiggsPair::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::MEHiggsPair::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.

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

The assignment operator is private and must never be called.

In fact, it should not even be implemented.

void Herwig::MEHiggsPair::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::HwMEBase.

Function used to write out object persistently.

Parameters:
osthe persistent output stream written to.

Reimplemented from Herwig::HwMEBase.

virtual void Herwig::MEHiggsPair::rebind ( const TranslationMap trans) [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:
transa TranslationMap relating the original objects to their respective clones.
Exceptions:
RebindExceptionif no cloned object was found for a given pointer.

Reimplemented from ThePEG::InterfacedBase.


Member Data Documentation

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

Indicates that this is a concrete class with persistent data.

Definition at line 249 of file MEHiggsPair.h.


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