Herwig++
2.7.0
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The METRP2to2 class implements the matrix elements for Transplanckian scattering process.
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#include <METRP2to2.h>
Public Member Functions | |
METRP2to2 () | |
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 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 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 | |
void | setup_interpolator () |
Setup the interpolator. | |
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. | |
InvEnergy | bccalc (Energy2 s) const |
The function which calculates b_c according to hep-ph/0112161, eq. | |
double | A_ny (Energy2 s, Energy2 t) const |
A_ny calculates part of the matrix element squared (divided by 16 * pi^2) according to hep-ph/0112161. | |
double | fpoint (double x) const |
fpoint initializes the matrix of pre-calculated points for the functions F_n(y) (hep-ph/0112161, eq. | |
double | fnyasympt (double y) const |
The asymptotic form of the F_n(y) functions, used for y>20, according to hep-ph/0112161, eq. | |
Private Member Functions | |
METRP2to2 & | operator= (const METRP2to2 &) |
The assignment operator is private and must never be called. | |
Private Attributes | |
Interpolator< double, double >::Ptr | _interpol |
Interpolator. | |
unsigned int | _maxflavour |
Maximum number of quark flavours to include. | |
unsigned int | _ndim |
Number of Extra dimensions (>=2) | |
Energy | _planckmass |
The Extra-dimensional Planck mass. | |
unsigned int | _process |
Processes to include. |
The METRP2to2 class implements the matrix elements for Transplanckian scattering process.
Definition at line 28 of file METRP2to2.h.
double Herwig::METRP2to2::A_ny | ( | Energy2 | s, |
Energy2 | t | ||
) | const [protected] |
A_ny calculates part of the matrix element squared (divided by 16 * pi^2) according to hep-ph/0112161.
eq.(19)
InvEnergy Herwig::METRP2to2::bccalc | ( | Energy2 | s | ) | const [protected] |
The function which calculates b_c according to hep-ph/0112161, eq.
(18)
virtual IBPtr Herwig::METRP2to2::clone | ( | ) | const [protected, virtual] |
Make a simple clone of this object.
Implements ThePEG::InterfacedBase.
virtual Selector<const ColourLines *> Herwig::METRP2to2::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::METRP2to2::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::METRP2to2::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.
double Herwig::METRP2to2::fnyasympt | ( | double | y | ) | const [protected] |
The asymptotic form of the F_n(y) functions, used for y>20, according to hep-ph/0112161, eq.
(25)
double Herwig::METRP2to2::fpoint | ( | double | x | ) | const [protected] |
fpoint initializes the matrix of pre-calculated points for the functions F_n(y) (hep-ph/0112161, eq.
(20)
virtual IBPtr Herwig::METRP2to2::fullclone | ( | ) | const [protected, virtual] |
Make a clone of this object, possibly modifying the cloned object to make it sane.
Reimplemented from ThePEG::InterfacedBase.
virtual IVector Herwig::METRP2to2::getReferences | ( | ) | [protected, virtual] |
Return a vector of all pointers to Interfaced objects used in this object.
Reimplemented from ThePEG::InterfacedBase.
static void Herwig::METRP2to2::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::METRP2to2::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::METRP2to2::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::METRP2to2::persistentOutput | ( | PersistentOStream & | os | ) | const |
Function used to write out object persistently.
os | the persistent output stream written to. |
Reimplemented from Herwig::HwMEBase.
virtual void Herwig::METRP2to2::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.