Pythia7::TimeShowerHandler Class Reference

TimeShowerHandler is a wrapper around the internal Shower::TimeShower class to perform a space-like parton shower. More...

#include <TimeShowerHandler.h>

Inheritance diagram for Pythia7::TimeShowerHandler:

ThePEG::HandlerBase ThePEG::HandlerBaseT< T > ThePEG::Interfaced ThePEG::InterfacedBase ThePEG::Base ThePEG::Named ThePEG::Pointer::ReferenceCounted

List of all members.

Public Member Functions

Shower::TimeShowergetModel ()
 Set the static parameters of the underlying model object and return an instance.
int angularOrder () const
 Angular ordering; = 0: off, = 1: on for g emission, = 2: on also for $g\rightarrow q \bar{q}$ splitting.
int nQuark () const
 Number of allowed quark flavours in $g\rightarrow q \bar{q}$ branching.
int alphaSMode () const
 Running of alpha_strong in evolution: = 0: fixed; = 1: scale $Q^2/4$; = 2: scale $p_\perp^2$; = 3: scale $p_\perp^2$, except for $g\rightarrow q \bar{q}$, where it is $Q^2/4$.
int MEMode () const
 Also allow a QED shower together with QCD ones: = 0: no; = 1: radiate on-shell photons; = 2 : also allow photons to branch.
int QEDShower () const
 Also allow a QED shower together with QCD ones: = 0: no; = 1: radiate on-shell photons; = 2 : also allow photons to branch.
int initialCone () const
 Restrict first emission within cone given by colour flow in hard process.
int phiPolAsym () const
 Azimuthal asymmetry induced by gluon polarization.
int phoCoherAsym () const
 Azimuthal asymmetry induced by colour coherence.
int respectScale () const
 Use the scale variable of original partons to restrict branchings.
Energy Q0 () const
 Parton shower cut-off mass for QCD emissions.
Energy Q0ChgQ () const
 Parton shower cut-off mass for photon coupling to coloured particle.
Energy Q0ChgL () const
 Parton shower cut-off mass for pure QED branchings.
double alphaSFix () const
 Fixed alpha_strong value for AlphaSMode == 0.
Energy Lambda5 () const
 $\Lambda_{\mbox{QCD}}$ (five flavours) in alpha_strong for AlphaSMode >= 1.
double alphaEMFix () const
 Fixed $\alpha_{\mbox{EM}}$ value.
double Q0FracPS () const
 Fraction of Q0 cut-off mass used as safety margin in daughter mass sum.
Standard constructors and destructors.
 TimeShowerHandler ()
 The default constructor.
 TimeShowerHandler (const TimeShowerHandler &)
 The copy constructor.
virtual ~TimeShowerHandler ()
 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 ()
 Standard Init function used to initialize the interfaces.

Protected Member Functions

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 doupdate () throw (UpdateException)
 Check sanity of the object during the setup phase.
virtual void doinit () throw (InitException)
 Initialize this object after the setup phase before saving an EventGenerator to disk.
virtual void doinitrun ()
 Initialize this object.
virtual void dofinish ()
 Finalize this object.
virtual void rebind (const TranslationMap &trans) throw (RebindException)
 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

TimeShowerHandleroperator= (const TimeShowerHandler &)
 Private and non-existent assignment operator.

Private Attributes

Shower::TimeShowertheShowerModel
 The object implementing the actual model.
int theAngularOrdering
 Angular ordering; = 0: off, = 1: on for g emission, = 2: on also for g -> q qbar splitting.
int theNQuark
 Number of allowed quark flavours in g -> q qbar branching.
int theAlphaSMode
 Running of alpha_strong in evolution: = 0: fixed; = 1: scale Q^2/4; = 2: scale pT^2; = 3: scale pT2, except for g -> q qbar, where it is Q^2/4 .
int theMEMode
 Also allow a QED shower together with QCD ones: = 0: no; = 1: radiate on-shell photons; = 2 : also allow photons to branch.
int theQEDShower
 Also allow a QED shower together with QCD ones: = 0: no; = 1: radiate on-shell photons; = 2 : also allow photons to branch.
int theInitialCone
 Restrict first emission within cone given by colour flow in hard process.
int thePhiPolAsym
 Azimuthal asymmetry induced by gluon polarization.
int thePhiCoherAsym
 Azimuthal asymmetry induced by colour coherence.
int theRespectScale
 Use the scale variable of original partons to restrict branchings.
Energy theQ0
 Parton shower cut-off mass for QCD emissions.
Energy theQ0ChgQ
 Parton shower cut-off mass for photon coupling to coloured particle.
Energy theQ0ChgL
 Parton shower cut-off mass for pure QED branchings.
double theAlphaSFix
 Fixed alpha_strong value for AlphaSMode == 0.
Energy theLambda5
 Lambda_QCD(five flavours) in alpha_strong for AlphaSMode >= 1.
double theAlphaEMFix
 Fixed alpha_EM value.
double theQ0FracPS
 Fraction of Q0 cut-off mass used as safety margin in daughter mass sum.

Static Private Attributes

static ClassDescription
< TimeShowerHandler
initTimeShowerHandler
 Describe a concrete class with persistent data.


Detailed Description

TimeShowerHandler is a wrapper around the internal Shower::TimeShower class to perform a space-like parton shower.

See also:
The interfaces defined for TimeShowerHandler.

Definition at line 22 of file TimeShowerHandler.h.


Member Function Documentation

int Pythia7::TimeShowerHandler::initialCone (  )  const [inline]

Restrict first emission within cone given by colour flow in hard process.

= 0: no; = 1: yes, isotropic phi angle inside cone; = 2: yes, also with anisotropic phi angle inside cone.

int Pythia7::TimeShowerHandler::phiPolAsym (  )  const [inline]

Azimuthal asymmetry induced by gluon polarization.

= 0: no; = 1: yes.

int Pythia7::TimeShowerHandler::phoCoherAsym (  )  const [inline]

Azimuthal asymmetry induced by colour coherence.

= 0: no; = 1: yes.

int Pythia7::TimeShowerHandler::respectScale (  )  const [inline]

Use the scale variable of original partons to restrict branchings.

= 0: no; = 1: yes, $Q^2 <$ scale; = 2: yes, $p_\perp^2 <$ scale, = 3: yes, $(E\theta)^2 <$ scale; = 4: yes, $\theta^2 <$ scale. (In all cases relations are approximate.)

Energy Pythia7::TimeShowerHandler::Q0ChgL (  )  const [inline]

Parton shower cut-off mass for pure QED branchings.

Assumed <= Q0CHGQ.

double Pythia7::TimeShowerHandler::Q0FracPS (  )  const [inline]

Fraction of Q0 cut-off mass used as safety margin in daughter mass sum.

Relevant for total parton multiplicity.

void Pythia7::TimeShowerHandler::persistentOutput ( PersistentOStream os  )  const

Function used to write out object persistently.

Parameters:
os the persistent output stream written to.

Reimplemented from ThePEG::Interfaced.

void Pythia7::TimeShowerHandler::persistentInput ( PersistentIStream is,
int  version 
)

Function used to read in object persistently.

Parameters:
is the persistent input stream read from.
version the version number of the object when written.

Reimplemented from ThePEG::Interfaced.

virtual IBPtr Pythia7::TimeShowerHandler::clone (  )  const [inline, protected, virtual]

Make a simple clone of this object.

Returns:
a pointer to the new object.

Implements ThePEG::InterfacedBase.

virtual IBPtr Pythia7::TimeShowerHandler::fullclone (  )  const [inline, protected, virtual]

Make a clone of this object, possibly modifying the cloned object to make it sane.

Returns:
a pointer to the new object.

Reimplemented from ThePEG::InterfacedBase.

virtual void Pythia7::TimeShowerHandler::doinit (  )  throw (InitException) [inline, protected, virtual]

Initialize this object after the setup phase before saving an EventGenerator to disk.

Exceptions:
InitException if object could not be initialized properly.

Reimplemented from ThePEG::InterfacedBase.

virtual void Pythia7::TimeShowerHandler::doinitrun (  )  [inline, protected, virtual]

Initialize this object.

Called in the run phase just before a run begins.

Reimplemented from ThePEG::InterfacedBase.

virtual void Pythia7::TimeShowerHandler::dofinish (  )  [inline, protected, virtual]

Finalize this object.

Called in the run phase just after a run has ended. Used eg. to write out statistics.

Reimplemented from ThePEG::InterfacedBase.

virtual void Pythia7::TimeShowerHandler::rebind ( const TranslationMap trans  )  throw (RebindException) [inline, 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.

Parameters:
trans a TranslationMap relating the original objects to their respective clones.
Exceptions:
RebindException if no cloned object was found for a given pointer.

Reimplemented from ThePEG::InterfacedBase.

virtual IVector Pythia7::TimeShowerHandler::getReferences (  )  [inline, protected, virtual]

Return a vector of all pointers to Interfaced objects used in this object.

Returns:
a vector of pointers.

Reimplemented from ThePEG::InterfacedBase.


Member Data Documentation

Restrict first emission within cone given by colour flow in hard process.

= 0: no; = 1: yes, isotropic phi angle inside cone; = 2: yes, also with anisotropic phi angle inside cone.

Definition at line 291 of file TimeShowerHandler.h.

Azimuthal asymmetry induced by gluon polarization.

= 0: no; = 1: yes.

Definition at line 298 of file TimeShowerHandler.h.

Azimuthal asymmetry induced by colour coherence.

= 0: no; = 1: yes.

Definition at line 305 of file TimeShowerHandler.h.

Use the scale variable of original partons to restrict branchings.

= 0: no; = 1: yes, the Q2 < scale; = 2: yes, the pT2 < scale, = 3: yes, the (E*theta)^2 < scale; = 4: yes, the theta^2 < scale. (In all cases relations are approximate.)

Definition at line 314 of file TimeShowerHandler.h.

Parton shower cut-off mass for pure QED branchings.

Assumed <= Q0CHGQ.

Definition at line 332 of file TimeShowerHandler.h.

Fraction of Q0 cut-off mass used as safety margin in daughter mass sum.

Relevant for total parton multiplicity.

Definition at line 357 of file TimeShowerHandler.h.


The documentation for this class was generated from the following file:

Generated on Thu Apr 29 12:45:34 2010 for Pythia7 by  doxygen 1.5.5