Herwig++
2.7.0
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DipoleSplittingKinematics is the base class for dipole splittings as performed in the dipole shower. More...
#include <DipoleSplittingKinematics.h>
Public Types | |
enum | ZSamplingOptions { FlatZ = 0, OneOverZ, OneOverOneMinusZ, OneOverZOneMinusZ } |
Enumerate the variants of sampling z. | |
Public Member Functions | |
virtual pair< double, double > | kappaSupport (const DipoleSplittingInfo &) const |
Return the boundaries in between the evolution variable random number is to be sampled; the lower cuoff is assumed to correspond to the infrared cutoff. | |
virtual pair< double, double > | xiSupport (const DipoleSplittingInfo &) const |
Return the boundaries in between the momentum fraction random number is to be sampled. | |
virtual Energy | dipoleScale (const Lorentz5Momentum &pEmitter, const Lorentz5Momentum &pSpectator) const |
Return the dipole scale associated to the given pair of emitter and spectator. | |
virtual Energy | ptMax (Energy dScale, double emX, double specX, const DipoleIndex &dIndex, const DipoleSplittingKernel &split) const =0 |
Return the maximum pt for the given dipole scale. | |
virtual Energy | QMax (Energy dScale, double emX, double specX, const DipoleIndex &dIndex, const DipoleSplittingKernel &split) const =0 |
Return the maximum virtuality for the given dipole scale. | |
virtual Energy | PtFromQ (Energy scale, const DipoleSplittingInfo &) const =0 |
Return the pt given a virtuality. | |
virtual Energy | QFromPt (Energy scale, const DipoleSplittingInfo &) const =0 |
Return the virtuality given a pt. | |
virtual Energy | IRCutoff () const |
Return the infrared cutoff. | |
double | xMin () const |
Return the minimum momentum fraction for incoming partons. | |
Energy | generatePt (double r, Energy dScale, double emX, double specX, const DipoleIndex &dIndex, const DipoleSplittingKernel &split, double &weight) const |
Generate a pt. | |
virtual double | ptToRandom (Energy pt, Energy dScale, double emX, double specX, const DipoleIndex &dIndex, const DipoleSplittingKernel &split) const |
Return the random number associated to the given pt. | |
virtual pair< double, double > | zBoundaries (Energy pt, const DipoleSplittingInfo &dInfo, const DipoleSplittingKernel &split) const =0 |
Return the boundaries on the momentum fraction. | |
double | generateZ (double r, Energy pt, int sampling, const DipoleSplittingInfo &dInfo, const DipoleSplittingKernel &split, double &weight) const |
Generate a z value flat. | |
virtual bool | generateSplitting (double kappa, double xi, double phi, DipoleSplittingInfo &dIndex, const DipoleSplittingKernel &)=0 |
Generate splitting variables given three random numbers and the momentum fractions of the emitter and spectator. | |
double | jacobian () const |
Get the splitting phasespace weight associated to the last call to generateSplitting. | |
virtual bool | haveOverestimate () const |
Return true, if this splitting kinematics class is capable of delivering an overestimate to the jacobian. | |
virtual double | jacobianOverestimate () const |
Return the overestimated jacobian for the last generated parameters. | |
Energy | lastPt () const |
Return the last generated pt. | |
double | lastZ () const |
Return the last generated momentum fraction. | |
double | lastPhi () const |
Return the last generated azimuthal angle. | |
double | lastEmitterZ () const |
Return the momentum fraction, by which the emitter's momentum fraction should be divided after the splitting. | |
double | lastSpectatorZ () const |
Return the momentum fraction, by which the spectator's momentum fraction should be divided after the splitting. | |
const vector< double > & | lastSplittingParameters () const |
Return any additional parameters needed to evaluate the splitting kernel or to generate the full splitting. | |
void | prepareSplitting (DipoleSplittingInfo &dInfo) |
Complete a DipoleSplittingInfo object with the parameters generated by the last call to generateSplitting() | |
virtual void | generateKinematics (const Lorentz5Momentum &pEmitter, const Lorentz5Momentum &pSpectator, const DipoleSplittingInfo &dInfo)=0 |
Generate the full kinematics given emitter and spectator momentum and a previously completeted DipoleSplittingInfo object. | |
const Lorentz5Momentum & | lastEmitterMomentum () const |
Return the emitter's momentum after the splitting. | |
const Lorentz5Momentum & | lastSpectatorMomentum () const |
Return the spectator's momentum after the splitting. | |
const Lorentz5Momentum & | lastEmissionMomentum () const |
Return the emission's momentum. | |
virtual bool | doesTransform () const |
virtual Lorentz5Momentum | transform (const Lorentz5Momentum &p) const |
Standard constructors and destructors. | |
DipoleSplittingKinematics () | |
The default constructor. | |
virtual | ~DipoleSplittingKinematics () |
The destructor. | |
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 | |
Lorentz5Momentum | getKt (const Lorentz5Momentum &p1, const Lorentz5Momentum &p2, Energy pt, double phi, bool spacelike=false) const |
Calculate a transverse momentum for the given momenta, invariant pt and azimuth. | |
void | jacobian (double w) |
Set the splitting phasespace weight associated to the last call to generateSplitting. | |
void | lastPt (Energy p) |
Set the last generated pt. | |
void | lastZ (double z) |
Set the last generated momentum fraction. | |
void | lastPhi (double p) |
Set the last generated azimuthal angle. | |
void | lastEmitterZ (double z) |
Set the momentum fraction, by which the emitter's momentum fraction should be divided after the splitting. | |
void | lastSpectatorZ (double z) |
Set the momentum fraction, by which the spectator's momentum fraction should be divided after the splitting. | |
vector< double > & | splittingParameters () |
Access any additional parameters needed to evaluate the splitting kernel or to generate the full splitting. | |
void | emitterMomentum (const Lorentz5Momentum &p) |
Set the emitter's momentum after the splitting. | |
void | spectatorMomentum (const Lorentz5Momentum &p) |
Set the spectator's momentum after the splitting. | |
void | emissionMomentum (const Lorentz5Momentum &p) |
Set the emission's momentum. | |
Protected Attributes | |
Ptr< DipoleMCCheck >::ptr | theMCCheck |
Pointer to a check histogram object. | |
Private Member Functions | |
DipoleSplittingKinematics & | operator= (const DipoleSplittingKinematics &) |
The assignment operator is private and must never be called. | |
Private Attributes | |
Energy | theIRCutoff |
The infrared cutoff associated to this splitting kinematics. | |
double | theXMin |
The minimum momentum fraction for incoming partons. | |
double | theJacobian |
The last calculated splitting phase space weight. | |
Energy | theLastPt |
The last generated pt. | |
double | theLastZ |
The last generated momentum fraction. | |
double | theLastPhi |
The last generated azimuthal angle. | |
double | theLastEmitterZ |
The momentum fraction, by which the emitter's momentum fraction should be divided after the splitting. | |
double | theLastSpectatorZ |
The momentum fraction, by which the spectator's momentum fraction should be divided after the splitting. | |
vector< double > | theLastSplittingParameters |
Any additional parameters needed to evaluate the splitting kernel or to generate the full splitting. | |
Lorentz5Momentum | theEmitterMomentum |
The emitter's momentum after the splitting. | |
Lorentz5Momentum | theEmissionMomentum |
The emission's momentum after the splitting. | |
Lorentz5Momentum | theSpectatorMomentum |
The spectator's momentum after the splitting. | |
Static Private Attributes | |
static AbstractClassDescription < DipoleSplittingKinematics > | initDipoleSplittingKinematics |
The static object used to initialize the description of this class. |
DipoleSplittingKinematics is the base class for dipole splittings as performed in the dipole shower.
Definition at line 38 of file DipoleSplittingKinematics.h.
virtual Energy Herwig::DipoleSplittingKinematics::dipoleScale | ( | const Lorentz5Momentum & | pEmitter, |
const Lorentz5Momentum & | pSpectator | ||
) | const [inline, virtual] |
Return the dipole scale associated to the given pair of emitter and spectator.
This should be the invariant mass or absolute value final/final or initial/initial and the absolute value of the momentum transfer for intial/final or final/initial dipoles.
Reimplemented in Herwig::IFMassiveKinematics, Herwig::FFMassiveKinematics, and Herwig::FIMassiveKinematics.
Definition at line 82 of file DipoleSplittingKinematics.h.
References sqrt().
virtual bool Herwig::DipoleSplittingKinematics::generateSplitting | ( | double | kappa, |
double | xi, | ||
double | phi, | ||
DipoleSplittingInfo & | dIndex, | ||
const DipoleSplittingKernel & | |||
) | [pure virtual] |
Generate splitting variables given three random numbers and the momentum fractions of the emitter and spectator.
Return true on success.
Implemented in Herwig::IFMassiveKinematics, Herwig::FFMassiveKinematics, Herwig::FIMassiveKinematics, Herwig::IFLightKinematics, Herwig::IILightKinematics, Herwig::FFLightKinematics, and Herwig::FILightKinematics.
static void Herwig::DipoleSplittingKinematics::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 ThePEG::HandlerBase.
Reimplemented in Herwig::FFMassiveKinematics, Herwig::FIMassiveKinematics, Herwig::IFMassiveKinematics, Herwig::IILightKinematics, Herwig::IFLightKinematics, Herwig::FFLightKinematics, and Herwig::FILightKinematics.
double Herwig::DipoleSplittingKinematics::jacobian | ( | ) | const [inline] |
Get the splitting phasespace weight associated to the last call to generateSplitting.
This is taken to be the single particle phasespace times 16 ^2 divided by the relevant propagator invariant.
Definition at line 184 of file DipoleSplittingKinematics.h.
void Herwig::DipoleSplittingKinematics::jacobian | ( | double | w | ) | [inline, protected] |
Set the splitting phasespace weight associated to the last call to generateSplitting.
This is taken to be the single particle phasespace times 16 ^2 divided by the relevant propagator invariant.
Definition at line 296 of file DipoleSplittingKinematics.h.
DipoleSplittingKinematics& Herwig::DipoleSplittingKinematics::operator= | ( | const DipoleSplittingKinematics & | ) | [private] |
The assignment operator is private and must never be called.
In fact, it should not even be implemented.
void Herwig::DipoleSplittingKinematics::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 ThePEG::Interfaced.
Reimplemented in Herwig::FFMassiveKinematics, Herwig::FIMassiveKinematics, Herwig::IFMassiveKinematics, Herwig::IILightKinematics, Herwig::IFLightKinematics, Herwig::FFLightKinematics, and Herwig::FILightKinematics.
void Herwig::DipoleSplittingKinematics::persistentOutput | ( | PersistentOStream & | os | ) | const |
Function used to write out object persistently.
os | the persistent output stream written to. |
Reimplemented from ThePEG::Interfaced.
Reimplemented in Herwig::FFMassiveKinematics, Herwig::FIMassiveKinematics, Herwig::IFMassiveKinematics, Herwig::IILightKinematics, Herwig::IFLightKinematics, Herwig::FFLightKinematics, and Herwig::FILightKinematics.
AbstractClassDescription<DipoleSplittingKinematics> Herwig::DipoleSplittingKinematics::initDipoleSplittingKinematics [static, private] |
The static object used to initialize the description of this class.
Indicates that this is an abstract class.
Definition at line 460 of file DipoleSplittingKinematics.h.