Herwig++
2.7.0
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The MENeutralCurrentDIS class provides the matrix elements for neutral current DIS. More...
#include <MENeutralCurrentDIS.h>
Public Member Functions | |
MENeutralCurrentDIS () | |
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 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 | helicityME (vector< SpinorWaveFunction > &f1, vector< SpinorWaveFunction > &f2, vector< SpinorBarWaveFunction > &a1, vector< SpinorBarWaveFunction > &a2, bool lorder, bool qorder, bool me) const |
Matrix element for ![]() | |
unsigned int | gammaZOption () const |
Option for treatment of ![]() | |
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. | |
Standard Interfaced functions. | |
virtual void | doinit () |
Initialize this object after the setup phase before saving an EventGenerator to disk. | |
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. | |
Private Member Functions | |
MENeutralCurrentDIS & | operator= (const MENeutralCurrentDIS &) |
The assignment operator is private and must never be called. | |
Private Attributes | |
ProductionMatrixElement | _me |
Matrix element for spin correlations. | |
AbstractFFVVertexPtr | _theFFZVertex |
Pointer to the vertices for the helicity calculations. | |
AbstractFFVVertexPtr | _theFFPVertex |
Pointer to the photon vertex. | |
tcPDPtr | _z0 |
Pointers to the intermediate resonances. | |
tcPDPtr | _gamma |
Pointer to the photon ParticleData object. | |
int | _minflavour |
Switches to control the particles in the hard process. | |
int | _maxflavour |
Maximum flavour of the incoming quarks. | |
unsigned int | _gammaZ |
Whether to include both ![]() ![]() | |
double | _sinW |
Electroweak parameters. | |
double | _cosW |
![]() | |
Energy2 | _mz2 |
The square of the Z mass. | |
Static Private Attributes | |
static ClassDescription < MENeutralCurrentDIS > | initMENeutralCurrentDIS |
The static object used to initialize the description of this class. |
The MENeutralCurrentDIS class provides the matrix elements for neutral current DIS.
For consistency both the incoming and outgoing quarks are assumed to be massless.
Definition at line 27 of file MENeutralCurrentDIS.h.
virtual IBPtr Herwig::MENeutralCurrentDIS::clone | ( | ) | const [inline, protected, virtual] |
Make a simple clone of this object.
Implements ThePEG::InterfacedBase.
Definition at line 168 of file MENeutralCurrentDIS.h.
virtual Selector<const ColourLines *> Herwig::MENeutralCurrentDIS::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::MENeutralCurrentDIS::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::MENeutralCurrentDIS::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 Herwig::DISBase.
virtual IBPtr Herwig::MENeutralCurrentDIS::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 174 of file MENeutralCurrentDIS.h.
double Herwig::MENeutralCurrentDIS::helicityME | ( | vector< SpinorWaveFunction > & | f1, |
vector< SpinorWaveFunction > & | f2, | ||
vector< SpinorBarWaveFunction > & | a1, | ||
vector< SpinorBarWaveFunction > & | a2, | ||
bool | lorder, | ||
bool | qorder, | ||
bool | me | ||
) | const [protected] |
Matrix element for .
f1 | Fermion on lepton line |
a1 | Anti-fermion on lepton line |
f2 | Fermion on quark line |
a2 | Anti-fermion on quark line |
lorder | The order of particles on the lepton line |
qorder | The order of particles on the quark line |
me | Whether or not to calculate the matrix element for spin correlations |
static void Herwig::MENeutralCurrentDIS::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::MENeutralCurrentDIS::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.
MENeutralCurrentDIS& Herwig::MENeutralCurrentDIS::operator= | ( | const MENeutralCurrentDIS & | ) | [private] |
The assignment operator is private and must never be called.
In fact, it should not even be implemented.
void Herwig::MENeutralCurrentDIS::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::DISBase.
void Herwig::MENeutralCurrentDIS::persistentOutput | ( | PersistentOStream & | os | ) | const |
Function used to write out object persistently.
os | the persistent output stream written to. |
Reimplemented from Herwig::DISBase.
int Herwig::MENeutralCurrentDIS::_minflavour [private] |
Switches to control the particles in the hard process.
Minimumflavour of the incoming quarks
Definition at line 230 of file MENeutralCurrentDIS.h.
double Herwig::MENeutralCurrentDIS::_sinW [private] |
Pointer to the vertices for the helicity calculations.
Pointer to the Z vertex
Definition at line 200 of file MENeutralCurrentDIS.h.
tcPDPtr Herwig::MENeutralCurrentDIS::_z0 [private] |
Pointers to the intermediate resonances.
Pointer to the Z ParticleData object
Definition at line 215 of file MENeutralCurrentDIS.h.
ClassDescription<MENeutralCurrentDIS> Herwig::MENeutralCurrentDIS::initMENeutralCurrentDIS [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 183 of file MENeutralCurrentDIS.h.