Herwig++
2.7.0
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The MEPP2ZHPowheg class implements the matrix element for .
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#include <MEPP2ZHPowheg.h>
Public Member Functions | |
MEPP2ZHPowheg () | |
The default constructor. | |
Virtual functions required by the MEBase class. | |
virtual Energy2 | scale () const |
Return the scale associated with the last set phase space point. | |
virtual int | nDim () const |
The number of internal degreed of freedom used in the matrix element. | |
virtual bool | generateKinematics (const double *r) |
Generate internal degrees of freedom given 'nDim()' uniform random numbers in the interval ]0,1[. | |
virtual CrossSection | dSigHatDR () const |
Return the matrix element for the kinematical configuation previously provided by the last call to setKinematics(). | |
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 | NLOweight () const |
Calculate the correction weight with which leading-order configurations are re-weighted. | |
double | x (double xt, double v) const |
Calculate the variable ![]() | |
double | x_a (double x, double v) const |
Calculate the momentum fraction of the first parton. | |
double | x_b (double x, double v) const |
Calculate the momentum fraction of second parton. | |
double | xbar (double v) const |
Calculate the minimum of ![]() | |
double | Ltilde_qg (double x, double v) const |
Calculate the ratio of the radiative luminosity funcion to the Born luminosity function for the ![]() | |
double | Ltilde_gq (double x, double v) const |
Calculate the ratio of the radiative luminosity funcion to the Born luminosity function for the ![]() | |
double | Ltilde_qq (double x, double v) const |
Calculate the ratio of the radiative luminosity funcion to the Born luminosity function for the ![]() | |
double | Vtilde_qq () const |
Calculate the soft-virtual contribution to the NLO weight. | |
double | Ccalbar_qg (double x) const |
Function for calculation of the ![]() ![]() | |
double | Fcal_qg (double x, double v) const |
Function for calculation of the ![]() | |
double | Fcal_gq (double x, double v) const |
Function for calculation of the ![]() | |
double | Fcal_qq (double x, double v) const |
Function for calculation of the ![]() | |
double | Ftilde_qg (double xt, double v) const |
Function for calculation of the ![]() | |
double | Ftilde_gq (double xt, double v) const |
Function for calculation of the ![]() | |
double | Ftilde_qq (double xt, double v) const |
Function for calculation of the ![]() | |
double | Ctilde_qg (double x, double v) const |
Function for calculation of the ![]() | |
double | Ctilde_gq (double x, double v) const |
Function for calculation of the ![]() | |
double | Ctilde_qq (double x, double v) const |
Function for calculation of the ![]() | |
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 | |
MEPP2ZHPowheg & | operator= (const MEPP2ZHPowheg &) |
The assignment operator is private and must never be called. | |
Private Attributes | |
double | _xb_a |
The momentum fraction of the first parton in the Born process. | |
double | _xb_b |
The momentum fraction of the second parton in the Born process. | |
tcPDPtr | _parton_a |
The ParticleData object for the first parton in the Born process. | |
tcPDPtr | _parton_b |
The ParticleData object for the second parton in the Born process. | |
Ptr< BeamParticleData > ::transient_const_pointer | _hadron_A |
The BeamParticleData object for the first hadron. | |
Ptr< BeamParticleData > ::transient_const_pointer | _hadron_B |
The BeamParticleData object for the second hadron. | |
tcPDPtr | _gluon |
the ParticleData object for the gluon | |
const double | TR_ |
The ![]() | |
const double | CF_ |
The ![]() | |
double | _alphaS2Pi |
The value of ![]() | |
Energy2 | _mll2 |
The mass squared of the lepton pair. | |
Energy2 | _mu2 |
The renormalization/factorization scale. | |
unsigned int | _contrib |
Parameters for the NLO weight. | |
unsigned int | _nlo_alphaS_opt |
Whether to use a fixed or a running QCD coupling for the NLO weight. | |
double | _fixed_alphaS |
The value of alphaS to use for the nlo weight if _nloalphaSopt=1. | |
double | _a |
The magnitude of the correction term to reduce the negative contribution. | |
double | _p |
The power of the correction term to reduce the negative contribution. | |
double | _eps |
Cut-off for the correction function. | |
unsigned int | _scaleopt |
Choice of the scale. | |
Energy | _fixedScale |
Fixed scale if used. | |
double | _scaleFact |
Prefactor if variable scale used. | |
double | _xt |
Radiation variables. | |
double | _v |
The ![]() | |
double | _oldq |
Values of the PDF's before radiation. | |
double | _oldqbar |
For the antiquark. | |
Static Private Attributes | |
static ClassDescription < MEPP2ZHPowheg > | initMEPP2ZHPowheg |
The static object used to initialize the description of this class. |
The MEPP2ZHPowheg class implements the matrix element for .
Definition at line 22 of file MEPP2ZHPowheg.h.
virtual IBPtr Herwig::MEPP2ZHPowheg::clone | ( | ) | const [inline, protected, virtual] |
Make a simple clone of this object.
Reimplemented from Herwig::MEPP2ZH.
Definition at line 205 of file MEPP2ZHPowheg.h.
virtual void Herwig::MEPP2ZHPowheg::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::MEPP2ZH.
virtual CrossSection Herwig::MEPP2ZHPowheg::dSigHatDR | ( | ) | const [virtual] |
Return the matrix element for the kinematical configuation previously provided by the last call to setKinematics().
Uses me().
Reimplemented from Herwig::MEfftoVH.
virtual IBPtr Herwig::MEPP2ZHPowheg::fullclone | ( | ) | const [inline, protected, virtual] |
Make a clone of this object, possibly modifying the cloned object to make it sane.
Reimplemented from Herwig::MEPP2ZH.
Definition at line 211 of file MEPP2ZHPowheg.h.
virtual bool Herwig::MEPP2ZHPowheg::generateKinematics | ( | const double * | r | ) | [virtual] |
Generate internal degrees of freedom given 'nDim()' uniform random numbers in the interval ]0,1[.
To help the phase space generator, the 'dSigHatDR()' should be a smooth function of these numbers, although this is not strictly necessary. Return false if the chosen points failed the kinematical cuts.
Reimplemented from Herwig::MEfftoVH.
static void Herwig::MEPP2ZHPowheg::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::MEPP2ZH.
MEPP2ZHPowheg& Herwig::MEPP2ZHPowheg::operator= | ( | const MEPP2ZHPowheg & | ) | [private] |
The assignment operator is private and must never be called.
In fact, it should not even be implemented.
void Herwig::MEPP2ZHPowheg::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::MEPP2ZH.
void Herwig::MEPP2ZHPowheg::persistentOutput | ( | PersistentOStream & | os | ) | const |
Function used to write out object persistently.
os | the persistent output stream written to. |
Reimplemented from Herwig::MEPP2ZH.
unsigned int Herwig::MEPP2ZHPowheg::_contrib [private] |
Parameters for the NLO weight.
Whether to generate the positive, negative or leading order contribution
Definition at line 309 of file MEPP2ZHPowheg.h.
double Herwig::MEPP2ZHPowheg::_oldq [mutable, private] |
unsigned int Herwig::MEPP2ZHPowheg::_scaleopt [private] |
double Herwig::MEPP2ZHPowheg::_xt [private] |
ClassDescription<MEPP2ZHPowheg> Herwig::MEPP2ZHPowheg::initMEPP2ZHPowheg [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 232 of file MEPP2ZHPowheg.h.