Herwig++
2.7.0
|
The MEQCD2to2 class provides the matrix elements for QCD scattering processes in hadron-hadron collisions.
More...
#include <MEQCD2to2.h>
Public Member Functions | |
MEQCD2to2 () | |
The default constructor. | |
Virtual functions required by the MEBase class. | |
virtual unsigned int | orderInAlphaS () const |
Return the order in ![]() | |
virtual unsigned int | orderInAlphaEW () const |
Return the order in ![]() | |
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< DiagramIndex > | diagrams (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 | gg2ggME (vector< VectorWaveFunction > &g1, vector< VectorWaveFunction > &g2, vector< VectorWaveFunction > &g3, vector< VectorWaveFunction > &g4, unsigned int flow) const |
Members to calculate the matrix elements. | |
double | gg2qqbarME (vector< VectorWaveFunction > &g1, vector< VectorWaveFunction > &g2, vector< SpinorBarWaveFunction > &q, vector< SpinorWaveFunction > &qbar, unsigned int flow) const |
Matrix element for ![]() | |
double | qqbar2ggME (vector< SpinorWaveFunction > &q, vector< SpinorBarWaveFunction > &qbar, vector< VectorWaveFunction > &g1, vector< VectorWaveFunction > &g2, unsigned int flow) const |
Matrix element for ![]() | |
double | qg2qgME (vector< SpinorWaveFunction > &qin, vector< VectorWaveFunction > &g2, vector< SpinorBarWaveFunction > &qout, vector< VectorWaveFunction > &g4, unsigned int flow) const |
Matrix element for ![]() | |
double | qbarg2qbargME (vector< SpinorBarWaveFunction > &qin, vector< VectorWaveFunction > &g2, vector< SpinorWaveFunction > &qout, vector< VectorWaveFunction > &g4, unsigned int flow) const |
Matrix elements for ![]() | |
double | qq2qqME (vector< SpinorWaveFunction > &q1, vector< SpinorWaveFunction > &q2, vector< SpinorBarWaveFunction > &q3, vector< SpinorBarWaveFunction > &q4, unsigned int flow) const |
Matrix element for ![]() | |
double | qbarqbar2qbarqbarME (vector< SpinorBarWaveFunction > &q1, vector< SpinorBarWaveFunction > &q2, vector< SpinorWaveFunction > &q3, vector< SpinorWaveFunction > &q4, unsigned int flow) const |
Matrix element for ![]() | |
double | qqbar2qqbarME (vector< SpinorWaveFunction > &q1, vector< SpinorBarWaveFunction > &q2, vector< SpinorBarWaveFunction > &q3, vector< SpinorWaveFunction > &q4, unsigned int flow) const |
Matrix element for ![]() | |
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. | |
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. | |
Private Member Functions | |
MEQCD2to2 & | operator= (const MEQCD2to2 &) |
The assignment operator is private and must never be called. | |
Private Attributes | |
unsigned int | _maxflavour |
Maximum numbere of quark flavours to include. | |
unsigned int | _process |
Processes to include. | |
unsigned int | _flow |
Colour flow. | |
unsigned int | _diagram |
Diagram. | |
ProductionMatrixElement | _me |
Matrix element. | |
AbstractVVVVVertexPtr | _ggggvertex |
Vertices needed to compute the diagrams. | |
AbstractVVVVertexPtr | _gggvertex |
![]() | |
AbstractFFVVertexPtr | _qqgvertex |
![]() | |
PDPtr | _gluon |
ParticleData objects of the partons. | |
vector< PDPtr > | _quark |
the quarks | |
vector< PDPtr > | _antiquark |
the antiquarks | |
Static Private Attributes | |
static ClassDescription < MEQCD2to2 > | initMEQCD2to2 |
The static object used to initialize the description of this class. |
The MEQCD2to2 class provides the matrix elements for QCD scattering processes in hadron-hadron collisions.
Definition at line 35 of file MEQCD2to2.h.
virtual IBPtr Herwig::MEQCD2to2::clone | ( | ) | const [inline, protected, virtual] |
Make a simple clone of this object.
Implements ThePEG::InterfacedBase.
Definition at line 245 of file MEQCD2to2.h.
virtual Selector<const ColourLines *> Herwig::MEQCD2to2::colourGeometries | ( | tcDiagPtr | diag | ) | const [virtual] |
Return a Selector with possible colour geometries for the selected diagram weighted by their relative probabilities.
diag | the diagram chosen. |
Implements ThePEG::MEBase.
virtual Selector<DiagramIndex> Herwig::MEQCD2to2::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.
dv | the diagrams to be weighted. |
Reimplemented from ThePEG::MEBase.
virtual void Herwig::MEQCD2to2::doinit | ( | ) | [protected, virtual] |
Initialize this object after the setup phase before saving an EventGenerator to disk.
InitException | if object could not be initialized properly. |
Reimplemented from ThePEG::InterfacedBase.
virtual IBPtr Herwig::MEQCD2to2::fullclone | ( | ) | const [inline, protected, virtual] |
Make a clone of this object, possibly modifying the cloned object to make it sane.
Reimplemented from ThePEG::InterfacedBase.
Definition at line 251 of file MEQCD2to2.h.
virtual IVector Herwig::MEQCD2to2::getReferences | ( | ) | [protected, virtual] |
Return a vector of all pointers to Interfaced objects used in this object.
Reimplemented from ThePEG::InterfacedBase.
double Herwig::MEQCD2to2::gg2ggME | ( | vector< VectorWaveFunction > & | g1, |
vector< VectorWaveFunction > & | g2, | ||
vector< VectorWaveFunction > & | g3, | ||
vector< VectorWaveFunction > & | g4, | ||
unsigned int | flow | ||
) | const [protected] |
Members to calculate the matrix elements.
Matrix element for .
g1 | The wavefunctions for the first incoming gluon |
g2 | The wavefunctions for the second incoming gluon |
g3 | The wavefunctions for the first outgoing gluon |
g4 | The wavefunctions for the second outgoing gluon |
flow | The colour flow |
double Herwig::MEQCD2to2::gg2qqbarME | ( | vector< VectorWaveFunction > & | g1, |
vector< VectorWaveFunction > & | g2, | ||
vector< SpinorBarWaveFunction > & | q, | ||
vector< SpinorWaveFunction > & | qbar, | ||
unsigned int | flow | ||
) | const [protected] |
Matrix element for .
g1 | The wavefunctions for the first incoming gluon |
g2 | The wavefunctions for the second incoming gluon |
q | The wavefunction for the outgoing quark |
qbar | The wavefunction for the outgoing antiquark |
flow | The colour flow |
static void Herwig::MEQCD2to2::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::MEQCD2to2::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.
Implements ThePEG::MEBase.
The assignment operator is private and must never be called.
In fact, it should not even be implemented.
void Herwig::MEQCD2to2::persistentInput | ( | PersistentIStream & | is, |
int | version | ||
) |
Function used to read in object persistently.
is | the persistent input stream read from. |
version | the version number of the object when written. |
Reimplemented from Herwig::HwMEBase.
void Herwig::MEQCD2to2::persistentOutput | ( | PersistentOStream & | os | ) | const |
Function used to write out object persistently.
os | the persistent output stream written to. |
Reimplemented from Herwig::HwMEBase.
double Herwig::MEQCD2to2::qbarg2qbargME | ( | vector< SpinorBarWaveFunction > & | qin, |
vector< VectorWaveFunction > & | g2, | ||
vector< SpinorWaveFunction > & | qout, | ||
vector< VectorWaveFunction > & | g4, | ||
unsigned int | flow | ||
) | const [protected] |
Matrix elements for .
qin | The wavefunction for the incoming antiquark |
g2 | The wavefunction for the incoming gluon |
qout | The wavefunction for the outgoing antiquark |
g4 | The wavefunction for the outgoing gluon |
flow | The colour flow |
double Herwig::MEQCD2to2::qbarqbar2qbarqbarME | ( | vector< SpinorBarWaveFunction > & | q1, |
vector< SpinorBarWaveFunction > & | q2, | ||
vector< SpinorWaveFunction > & | q3, | ||
vector< SpinorWaveFunction > & | q4, | ||
unsigned int | flow | ||
) | const [protected] |
Matrix element for .
q1 | The wavefunction for the first incoming antiquark |
q2 | The wavefunction for the second incoming antiquark |
q3 | The wavefunction for the first outgoing antiquark |
q4 | The wavefunction for the second outgoing antiquark |
flow | The colour flow |
double Herwig::MEQCD2to2::qg2qgME | ( | vector< SpinorWaveFunction > & | qin, |
vector< VectorWaveFunction > & | g2, | ||
vector< SpinorBarWaveFunction > & | qout, | ||
vector< VectorWaveFunction > & | g4, | ||
unsigned int | flow | ||
) | const [protected] |
Matrix element for .
qin | The wavefunction for the incoming quark |
g2 | The wavefunction for the incoming gluon |
qout | The wavefunction for the outgoing quark |
g4 | The wavefunction for the outgoing gluon |
flow | The colour flow |
double Herwig::MEQCD2to2::qq2qqME | ( | vector< SpinorWaveFunction > & | q1, |
vector< SpinorWaveFunction > & | q2, | ||
vector< SpinorBarWaveFunction > & | q3, | ||
vector< SpinorBarWaveFunction > & | q4, | ||
unsigned int | flow | ||
) | const [protected] |
Matrix element for .
q1 | The wavefunction for the first incoming quark |
q2 | The wavefunction for the second incoming quark |
q3 | The wavefunction for the first outgoing quark |
q4 | The wavefunction for the second outgoing quark |
flow | The colour flow |
double Herwig::MEQCD2to2::qqbar2ggME | ( | vector< SpinorWaveFunction > & | q, |
vector< SpinorBarWaveFunction > & | qbar, | ||
vector< VectorWaveFunction > & | g1, | ||
vector< VectorWaveFunction > & | g2, | ||
unsigned int | flow | ||
) | const [protected] |
Matrix element for .
q | The wavefunction for the incoming quark |
qbar | The wavefunction for the incoming antiquark |
g1 | The wavefunctions for the first outgoing gluon |
g2 | The wavefunctions for the second outgoing gluon |
flow | The colour flow |
double Herwig::MEQCD2to2::qqbar2qqbarME | ( | vector< SpinorWaveFunction > & | q1, |
vector< SpinorBarWaveFunction > & | q2, | ||
vector< SpinorBarWaveFunction > & | q3, | ||
vector< SpinorWaveFunction > & | q4, | ||
unsigned int | flow | ||
) | const [protected] |
Matrix element for .
q1 | The wavefunction for the incoming quark |
q2 | The wavefunction for the incoming antiquark |
q3 | The wavefunction for the outgoing quark |
q4 | The wavefunction for the outgoing antiquark |
flow | The colour flow |
virtual void Herwig::MEQCD2to2::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.
trans | a TranslationMap relating the original objects to their respective clones. |
RebindException | if no cloned object was found for a given pointer. |
Reimplemented from ThePEG::InterfacedBase.
PDPtr Herwig::MEQCD2to2::_gluon [private] |
ClassDescription<MEQCD2to2> Herwig::MEQCD2to2::initMEQCD2to2 [static, private] |
The static object used to initialize the description of this class.
Indicates that this is a concrete class with persistent data.
Definition at line 292 of file MEQCD2to2.h.