The EventHandler is the base class used to implement event handlers in ThePEG. More...

#include <EventHandler.h>

Inheritance diagram for ThePEG::EventHandler:

[legend]

Public Types
enum	ConsistencyLevel { clNoCheck, clCollision, clStep, clPrintCollision, clPrintStep }
	Enumerate the different levels of consistency checking. More...

typedef vector< HandlerGroupBase * >	GroupVector
	A vector of `HandlerGroup`s. More...

Public Types inherited from ThePEG::InterfacedBase
enum	InitState { initializing = -1, uninitialized = 0, initialized = 1, runready = 2 }
	Enumeration reflecting the state of an InterfacedBase object. More...

Public Types inherited from ThePEG::Pointer::ReferenceCounted
typedef unsigned int	CounterType
	The integer type used for counting.

Public Types inherited from ThePEG::LastXCombInfo<>
typedef ThePEG::Ptr< XComb >::pointer	XCPtr
	Alias for a reference counted pointer to XC . More...

typedef ThePEG::Ptr< XComb >::const_pointer	cXCPtr
	Alias for a reference counted pointer to a const XC . More...

typedef ThePEG::Ptr< XComb >::transient_pointer	tXCPtr
	Alias for a transient pointer to XC . More...

typedef ThePEG::Ptr< XComb >::transient_const_pointer	tcXCPtr
	Alias for a transient pointer to a const XC . More...

Public Member Functions
Standard constructors and destructors.
	EventHandler (bool warnincomplete=true)
	Default constructor.

	EventHandler (const EventHandler &)
	Copy-constructor.

virtual	~EventHandler ()
	Destructor.

Main functions, some of which may be overridden by subclasses.
virtual void	initialize ()
	Initialize this event handler and all related objects needed to generate events.

virtual EventPtr	generateEvent ()
	Generate an event. More...

tEventPtr	generateEvent (tEventPtr e)
	Generate an Event, where the initial state is supplied from the outside. More...

tEventPtr	generateEvent (tStepPtr s)
	Generate an Event, where the initial state is supplied as a single step from the outside. More...

virtual EventPtr	continueEvent ()
	Continue generating an event if the generation has been stopped before finishing.

tCollPtr	continueCollision ()
	Continue the generation of a Collision. More...

void	clearEvent ()
	Clear all step handlers, making the handler ready for a new event.

virtual void	select (tXCombPtr newXComb)
	Change the XComb object.

virtual bool	empty () const
	Returns true if there are no step handlers left to apply to the current event;.

virtual void	statistics (ostream &) const
	Write out accumulated statistics about intergrated cross sections and stuff.

virtual CrossSection	histogramScale () const
	Histogram scale. More...

virtual CrossSection	integratedXSec () const
	The total integrated cross section of the processes generated in this run. More...

virtual CrossSection	integratedXSecErr () const
	The estimated error in the total integrated cross section of the processes generated in this run. More...

Simple access functions.
long	maxLoop () const
	Return the maximum number attemts allowed to select a sub-process for each event.

const cPDPair &	incoming () const
	The pair of incoming particle types. More...

const LuminosityFunction &	lumiFn () const
	Access the luminosity function.

tcLumiFnPtr	lumiFnPtr () const
	Access the luminosity function.

tLumiFnPtr	lumiFnPtr ()
	Access to the luminosity function.

tCutsPtr	cuts () const
	The kinematical cuts to used by subclasses which do not provide their own.

tPExtrPtr	partonExtractor () const
	A PartonExtractor object to be used by sub classes which do not provide their own.

tCascHdlPtr	cascadeHandler () const
	Return a pointer (possibly null) to the assigned main CascadeHandler.

tCascHdlPtr	CKKWHandler () const
	Return a pointer (possibly null) to the assigned main CascadeHandler to be used as CKKW-reweighter.

tEventPtr	currentEvent () const
	Gget current event.

tCollPtr	currentCollision () const
	Get current collision.

tStepPtr	currentStep () const
	Get current step.

bool	weighted () const
	Return true if this event handler should produce weightes events.

int	statLevel () const
	The level of statistics. More...

ConsistencyLevel	consistencyLevel () const
	Determines how often the event handler should check for charge and energy-momentum conservation.

double	consistencyEpsilon () const
	The maximum fraction of the total invariant mass of a collision that any of the components of the summed momentum is allowed to change during the generation.

Internal functions used by main functions and possibly
from the outside.
void	performStep (tStepHdlPtr handler, tHintPtr hint)
	Perform a given step using a handler and a hint.

void	addStep (Group::Level, Group::Handler, tStepHdlPtr=tStepHdlPtr(), tHintPtr=tHintPtr())
	In the curresnt list of step handlers to go through, add another step handler and/or hint.

tStepPtr	newStep (tcStepHdlPtr sh)
	Create a new step and make it current. More...

void	popStep ()
	Remove the last step.

virtual void	initGroups ()
	Initialize the groups of step handlers.

void	currentEvent (tEventPtr e)
	Set current event.

void	currentCollision (tCollPtr c)
	Set current collision.

void	currentStep (tStepPtr s)
	Set current step.

tStepHdlPtr	currentStepHandler () const
	Get current StepHandler.

void	currentStepHandler (tStepHdlPtr sh)
	Set current StepHandler.

void	throwCurrent ()
	Throw away the current event/collision.

virtual void	clean ()
	Throw away the last generated event before generating a new one.

virtual void	checkConsistency () const
	Check that the charge and energy-momentum in the last step of the current collision is consistent with the incoming particles. More...

Functions used by the persistent I/O system.
void	persistentOutput (PersistentOStream &os) const
	Function used to write out object persistently. More...

void	persistentInput (PersistentIStream &is, int version)
	Function used to read in object persistently. More...

Public Member Functions inherited from ThePEG::HandlerBaseT< UseRandom >
double	rnd () const
	Return a simple flat random number in the range ]0,1[.

double	rnd (double xu) const
	Return a simple flat random number in the range ]0,xu[.

double	rnd (double xl, double xu) const
	Return a simple flat random number in the range ]xl,xu[.

bool	rndbool () const
	Return true with 50% probability.

bool	rndbool (double p) const
	Return a true with probability p.

bool	rndbool (double p1, double p2) const
	Return a true with probability p1/(p1+p2).

int	rndsign (double p1, double p2, double p3) const
	Return -1, 0, or 1 with relative probabilities p1, p2, p3.

int	rnd2 (double p0, double p1) const
	Return an integer with probability p /(p0+p1).

int	rnd3 (double p0, double p1, double p2) const
	Return an integer with probability p /(p0+p1+p2).

int	rnd4 (double p0, double p1, double p2, double p3) const
	Return an integer/ with probability p (p0+p1+p2+p3).

long	irnd (long xu=2) const
	Return a simple flat random integrer number in the range [0,xu[.

long	irnd (long xl, long xu) const
	Return a simple flat random integrer number in the range [xl,xu[.

const StandardModelBase &	SM () const
	Return a reference to the object containing the standard model parameters for this run.

tSMPtr	standardModel () const
	Return a pointer to the object containing the standard model parameters for this run.

virtual	~HandlerBaseT ()
	Destructor.

Public Member Functions inherited from ThePEG::Interfaced
virtual	~Interfaced ()
	Empty virtual destructor.

virtual bool	defaultInit ()
	Functions which are to be used during the actual event generation, after the setup is complete. More...

PPtr	getParticle (PID) const
	Create a new Particle instance given a id number.

PDPtr	getParticleData (PID) const
	Return a pointer to the ParticleData object corresponding to the given id number.

bool	used () const
	Returns true if this object has actally been used.

void	useMe () const
	Should be called to indicate that this object has actually been used.

tEGPtr	generator () const
	Return a pointer to the EventGenerator controlling the run. More...

void	persistentOutput (PersistentOStream &os) const
	Function used to write out object persistently. More...

void	persistentInput (PersistentIStream &is, int version)
	Function used to read in object persistently. More...

Public Member Functions inherited from ThePEG::InterfacedBase
virtual	~InterfacedBase ()
	The virtual (empty) destructor;.

string	fullName () const
	Returns the full name of this object including its path, e.g. More...

string	name () const
	Returns the name of this object, without the path.

string	path () const
	Returns the path to this object including the trailing '/'. More...

string	comment () const
	Returns a comment assigned to this object.

void	setup (istream &is)
	Read setup info from a standard istream is. More...

virtual void	debugme () const
	Print out debugging information for this object on std::cerr. More...

void	update ()
	Calls the doupdate() function with recursion prevention.

void	init ()
	Calls the doinit() function with recursion prevention.

virtual bool	preInitialize () const
	Return true if this object needs to be initialized before all other objects (except those for which this function also returns true). More...

void	initrun ()
	Calls the doinitrun() function with recursion prevention.

void	finish ()
	Calls the dofinish() function with recursion prevention.

void	touch ()
	This function should be called every time something in this object has changed in a way that a sanity check with update() is needed.

void	reset ()
	Set the state of this object to uninitialized.

void	clear ()
	Calls reset() and unTouch().

InitState	state () const
	Return the state of initialization of this object.

bool	locked () const
	Return true if the BaseRepository is not allowed to change the state of this object.

bool	touched () const
	Return true if the state of this object has been changed since the last call to update().

void	persistentOutput (PersistentOStream &os) const
	Function used to write out object persistently. More...

void	persistentInput (PersistentIStream &is, int version)
	Function used to read in object persistently. More...

Public Member Functions inherited from ThePEG::Base
virtual	~Base ()
	The virtual destructor.

void	debug () const
	Print out debugging information for this object on std::cerr. More...

Public Member Functions inherited from ThePEG::Pointer::ReferenceCounted
CounterType	referenceCount () const
	Return the reference count.

Public Member Functions inherited from ThePEG::Named
	Named (const string &newName=string())
	Constructor with name.

	Named (const Named &)=default
	Explicit default copy-constructor (too avoid compiler warnings)

const string &	name () const
	Return name.

bool	operator== (const Named &other) const
	Test for equality.

bool	operator< (const Named &other) const
	Lexicographical comparison.

Public Member Functions inherited from ThePEG::LastXCombInfo<>
const XComb &	lastXComb () const
	Return a reference to the last selected XComb.

tXCPtr	lastXCombPtr () const
	Return a pointer to the last selected XComb.

const XComb &	lastHeadXComb () const
	If the last selected XComb object belongs to a group of XComb's return a reference to the head XComb object for this group.

tXCPtr	lastHeadXCombPtr () const
	If the last selected XComb object belongs to a group of XComb's return a pointer to the head XComb object for this group.

const EventHandler &	lastEventHandler () const
	Return a reference to the currently used EventHandler.

tPExtrPtr	lastExtractor () const
	A pointer to the currently used parton extractor.

PDFT	pdf (tcPPtr parton) const
	Return the parton density used to extract the given parton. More...

const Cuts &	lastCuts () const
	A reference to the currently used kinematical cuts.

tCutsPtr	lastCutsPtr () const
	A pointer to the currently used kinematical cuts.

const PPair &	lastParticles () const
	Return the pair of incoming parton instances.

Energy2	lastS () const
	The last generated total energy squared of the incoming particles.

const PPair &	lastPartons () const
	Return the pair of incoming parton instances.

Energy2	lastSHat () const
	The last used interval in total parton-parton energy squared.

double	lastTau () const
	Return lastSHat()/lastS().

double	lastY () const
	The generated rapidity of the hard scattering sub-system.

double	lastP1 () const
	Log of one over the momentum fraction of the first incoming particle w.r.t. More...

double	lastP2 () const
	Log of one over the momentum fraction of the second incoming particle w.r.t. More...

double	lastL1 () const
	Log of one over the first incoming parton momentum fraction w.r.t. More...

double	lastL2 () const
	Log of one over the second incoming parton momentum fraction w.r.t. More...

double	lastX1 () const
	The first incoming parton momentum fraction w.r.t. More...

double	lastX2 () const
	The second incoming parton momentum fraction w.r.t. More...

double	lastE1 () const
	Return 1-lastX1() to highest possible precision for x $\rightarrow$ 1.

double	lastE2 () const
	Return 1-lastX2() to highest possible precision for x $\rightarrow$ 1.

double	lastFL1L2 () const
	The product of the parton density functions at the last generated phase-space point.

Energy2	lastScale () const
	The chosen scale of the hard scattering.

double	lastAlphaS () const
	Get the $\alpha_S$ used in the hard scattering. More...

double	lastAlphaEM () const
	Get the $\alpha_{EM}$ used in the hard scattering. More...

const vector< Lorentz5Momentum > &	meMomenta () const
	Return the momenta of the incoming and outgoing partons to be used by the matrix element object, in the order specified by the TreeDiagram objects given by the matrix element.

double	lastME2 () const
	Return the matrix element squared as calculated for the last phase space point. More...

double	lastPreweight () const
	Return the last preweight factor.

double	jacobian () const
	Get the last jacobian obtained when generating the kinematics for the call to dSigHatDR.

CrossSection	lastMECrossSection () const
	Return the partonic cross section as calculated for the last phase space point. More...

double	lastMEPDFWeight () const
	Return the PDF weight as calculated for the last phase space point, if the matrix element does supply PDF weights. More...

double	lastMECouplings () const
	Return the coupling weight as calculated for the last phase space point.

tSubProPtr	subProcess () const
	Return the SubProcess object corresponding to the last generated sub-process.

const cPDVector &	mePartonData () const
	Return the incoming and outgoing parton types to be used by the matrix element object, in the order specified by the TreeDiagram objects given by the matrix element.

Static Public Member Functions
static void	Init ()
	Standard Init function used to initialize the interface.

Static Public Member Functions inherited from ThePEG::HandlerBase
static void	Init ()
	Standard Init function used to initialize the interface.

Static Public Member Functions inherited from ThePEG::Interfaced
static void	Init ()
	Standard Init function.

Static Public Member Functions inherited from ThePEG::InterfacedBase
static void	Init ()
	Standard Init function.

Static Public Member Functions inherited from ThePEG::Base
static void	Init ()
	The standard Init function used to initialize the interfaces. More...

Protected Member Functions
LuminosityFunction &	lumiFn ()
	Access to the luminosity function.

void	setupGroups ()
	Setup the step handler groups.

GroupVector &	groups ()
	Access the step handler groups.

const GroupVector &	groups () const
	Access the step handler groups.

void	lumiFn (LumiFnPtr)
	Set the luminosity function.

Clone Methods.
virtual IBPtr	clone () const
	Make a simple clone of this object. More...

virtual IBPtr	fullclone () const
	Make a clone of this object, possibly modifying the cloned object to make it sane. More...

Standard Interfaced functions.
virtual void	dofinish ()
	Finalize this object. More...

virtual void	rebind (const TranslationMap &trans)
	Rebind pointer to other Interfaced objects. More...

virtual IVector	getReferences ()
	Return a vector of all pointers to Interfaced objects used in this object. More...

Protected Member Functions inherited from ThePEG::Interfaced
void	reporeg (IBPtr object, string name) const
	Register the given object in the Repository with the given name in a subdirectory with the same name as this object. More...

template<typename PtrT >
bool	setDefaultReference (PtrT &ptr, string classname, string objectname)
	If the pointer, ptr, to an object is not set, create an object of class classname and register it with the Repository with the given objectname in a sib-directory with the same name as this object.

	Interfaced ()
	Protected default constructor.

	Interfaced (const string &newName)
	Protected constructor taking a name as argument.

	Interfaced (const Interfaced &i)
	Protected copy-constructor.

void	setGenerator (tEGPtr generator)
	Protected function to reset the generator pointer, required for automatic decayer generation in Herwig++ BSM models.

Protected Member Functions inherited from ThePEG::InterfacedBase
	InterfacedBase ()
	Protected default constructor.

	InterfacedBase (string newName)
	Protected constructor with the name given as argument.

	InterfacedBase (const InterfacedBase &i)
	Protected copy-constructor.

virtual void	readSetup (istream &is)
	Read setup info from a standard istream is. More...

virtual void	doupdate ()
	Check sanity of the object during the setup phase. More...

virtual void	doinit ()
	Initialize this object after the setup phase before saving an EventGenerator to disk. More...

virtual void	doinitrun ()
	Initialize this object. More...

Protected Member Functions inherited from ThePEG::Pointer::ReferenceCounted
	ReferenceCounted ()
	Default constructor.

	ReferenceCounted (const ReferenceCounted &)
	Copy-constructor.

ReferenceCounted &	operator= (const ReferenceCounted &)
	Assignment.

Protected Member Functions inherited from ThePEG::Named
const Named &	operator= (const Named &other)
	Assignment.

const string &	name (const string &newName)
	Set new name.

Protected Attributes
HandlerGroup< SubProcessHandler >	optSubprocessGroup
	Utility object to facilitate default selection of step handlers.

HandlerGroup< CascadeHandler >	optCascadeGroup
	Utility object to facilitate default selection of step handlers.

HandlerGroup< MultipleInteractionHandler >	optMultiGroup
	Utility object to facilitate default selection of step handlers.

HandlerGroup< HadronizationHandler >	optHadronizationGroup
	Utility object to facilitate default selection of step handlers.

HandlerGroup< DecayHandler >	optDecayGroup
	Utility object to facilitate default selection of step handlers.

GroupVector	optGroups
	Utility object to facilitate default selection of step handlers.

bool	warnIncomplete
	Emit warning that this EventHandler is incomplete.

cPDPair	theIncoming
	The pair of incoming particle types. More...

Protected Attributes inherited from ThePEG::LastXCombInfo<>
XCPtr	theLastXComb
	The pointer to the last selected XComb.

Private Member Functions
void	interfaceSetPostSubProcessHandler (StepHdlPtr, int)
	Utility function for the interface. More...

void	interfaceInsertPostSubProcessHandler (StepHdlPtr, int)
	Utility function for the interface. More...

void	interfaceErasePostSubProcessHandler (int)
	Utility function for the interface. More...

vector< StepHdlPtr >	interfaceGetPostSubProcessHandler () const
	Utility function for the interface. More...

void	interfaceSetPreCascadeHandler (StepHdlPtr, int)
	Utility function for the interface. More...

void	interfaceInsertPreCascadeHandler (StepHdlPtr, int)
	Utility function for the interface. More...

void	interfaceErasePreCascadeHandler (int)
	Utility function for the interface. More...

vector< StepHdlPtr >	interfaceGetPreCascadeHandler () const
	Utility function for the interface. More...

void	interfaceSetCascadeHandler (CascHdlPtr)
	Utility function for the interface. More...

CascHdlPtr	interfaceGetCascadeHandler () const
	Utility function for the interface. More...

void	interfaceSetPostCascadeHandler (StepHdlPtr, int)
	Utility function for the interface. More...

void	interfaceInsertPostCascadeHandler (StepHdlPtr, int)
	Utility function for the interface. More...

void	interfaceErasePostCascadeHandler (int)
	Utility function for the interface. More...

vector< StepHdlPtr >	interfaceGetPostCascadeHandler () const
	Utility function for the interface. More...

void	interfaceSetPreMultipleInteractionHandler (StepHdlPtr, int)
	Utility function for the interface. More...

void	interfaceInsertPreMultipleInteractionHandler (StepHdlPtr, int)
	Utility function for the interface. More...

void	interfaceErasePreMultipleInteractionHandler (int)
	Utility function for the interface. More...

vector< StepHdlPtr >	interfaceGetPreMultipleInteractionHandler () const
	Utility function for the interface. More...

void	interfaceSetMultipleInteractionHandler (MIHdlPtr)
	Utility function for the interface. More...

MIHdlPtr	interfaceGetMultipleInteractionHandler () const
	Utility function for the interface. More...

void	interfaceSetPostMultipleInteractionHandler (StepHdlPtr, int)
	Utility function for the interface. More...

void	interfaceInsertPostMultipleInteractionHandler (StepHdlPtr, int)
	Utility function for the interface. More...

void	interfaceErasePostMultipleInteractionHandler (int)
	Utility function for the interface. More...

vector< StepHdlPtr >	interfaceGetPostMultipleInteractionHandler () const
	Utility function for the interface. More...

void	interfaceSetPreHadronizationHandler (StepHdlPtr, int)
	Utility function for the interface. More...

void	interfaceInsertPreHadronizationHandler (StepHdlPtr, int)
	Utility function for the interface. More...

void	interfaceErasePreHadronizationHandler (int)
	Utility function for the interface. More...

vector< StepHdlPtr >	interfaceGetPreHadronizationHandler () const
	Utility function for the interface. More...

void	interfaceSetHadronizationHandler (HadrHdlPtr)
	Utility function for the interface. More...

HadrHdlPtr	interfaceGetHadronizationHandler () const
	Utility function for the interface. More...

void	interfaceSetPostHadronizationHandler (StepHdlPtr, int)
	Utility function for the interface. More...

void	interfaceInsertPostHadronizationHandler (StepHdlPtr, int)
	Utility function for the interface. More...

void	interfaceErasePostHadronizationHandler (int)
	Utility function for the interface. More...

vector< StepHdlPtr >	interfaceGetPostHadronizationHandler () const
	Utility function for the interface. More...

void	interfaceSetPreDecayHandler (StepHdlPtr, int)
	Utility function for the interface. More...

void	interfaceInsertPreDecayHandler (StepHdlPtr, int)
	Utility function for the interface. More...

void	interfaceErasePreDecayHandler (int)
	Utility function for the interface. More...

vector< StepHdlPtr >	interfaceGetPreDecayHandler () const
	Utility function for the interface. More...

void	interfaceSetDecayHandler (DecayHdlPtr)
	Utility function for the interface. More...

DecayHdlPtr	interfaceGetDecayHandler () const
	Utility function for the interface. More...

void	interfaceSetPostDecayHandler (StepHdlPtr, int)
	Utility function for the interface. More...

void	interfaceInsertPostDecayHandler (StepHdlPtr, int)
	Utility function for the interface. More...

void	interfaceErasePostDecayHandler (int)
	Utility function for the interface. More...

vector< StepHdlPtr >	interfaceGetPostDecayHandler () const
	Utility function for the interface. More...

EventHandler &	operator= (const EventHandler &)=delete
	Private and non-existent assignment operator.

Private Attributes
long	theMaxLoop
	The maximum number of attempts to select a sub-process allowed per event.

bool	weightedEvents
	True if this event handler should produce weightes events.

int	theStatLevel
	Controlls the amount of statistics written out after each run to the EventGenerators .out file.

ConsistencyLevel	theConsistencyLevel
	Determines how often the event handler should check for charge and energy-momentum conservation.

double	theConsistencyEpsilon
	The maximum fraction of the total invariant mass of a collision that any of the components of the summed momentum is allowed to change during the generation.

LumiFnPtr	theLumiFn
	Pointer to a luminosity function tobe used by subclasses.

CutsPtr	theCuts
	The kinematical cuts to used by subclasses which do not provide their own.

PExtrPtr	thePartonExtractor
	A PartonExtractor object to be used by sub classes which do not provide their own.

HandlerGroup< SubProcessHandler >	theSubprocessGroup
	The SubProcessHandler group.

HandlerGroup< CascadeHandler >	theCascadeGroup
	The CascadeHandler group.

HandlerGroup< MultipleInteractionHandler >	theMultiGroup
	The MultipleInteractionHandler group.

HandlerGroup< HadronizationHandler >	theHadronizationGroup
	The HadronizationHandler group.

HandlerGroup< DecayHandler >	theDecayGroup
	The DecayHandler group.

GroupVector	theGroups
	The step handler groups.

EventPtr	theCurrentEvent
	The current Event.

CollPtr	theCurrentCollision
	The current Collision.

StepPtr	theCurrentStep
	The current Step.

StepHdlPtr	theCurrentStepHandler
	The current StepHandler.

Static Private Attributes
static ClassDescription< EventHandler >	initEventHandler
	Describe a concrete class with persistent data. More...

Additional Inherited Members
Public Attributes inherited from ThePEG::Pointer::ReferenceCounted
const unsigned long	uniqueId
	The unique ID. More...

Static Protected Member Functions inherited from ThePEG::Interfaced
static void	registerRepository (IBPtr)
	Register an Interfaced object with the Repository.

static void	registerRepository (IBPtr, string newName)
	Register an Interfaced object with the Repository, giving it a name.

Detailed Description

The EventHandler is the base class used to implement event handlers in ThePEG.

Objects of this class is assigned to an EventGenerator object which supervises a run. This base class is not able to generate complete events, although it does have a virtual generateEvent(). If the EventGenerator to which an EventGenerator is assinged is asked to generate a full event, it will call the generateEvent() function which will write an error message and abort the run.

Objects of this base class can, however, be used to administer the evolution of a partially generated event supplied from the outside. To specify this event evolution the EventHandler maintains five groups of so-called StepHandlers implemented as HandlerGroups. Each group have a main step handler: SubProcessHandler, CascadeHandler, MultipleInteractionHandler, HadronizationHandler and DecayHandler respectively, whereof the first group only uses the post-handler part of the group.

The EventHandler class inherits from the LastXCombInfo class to have easy interface to the information in the last selected XComb which carries information about the hard sub-process in the event.

If a sub-class implements the generation of sub-processes and thus becomes a full event handler it should implement the generateEvent() function appropriately. It should also set the flag warnIncomplete to false, to avoid warnings when initialized as the main EventHandler of an Eventgenerator.

See also: The interfaces defined for EventHandler.; Collision; StepHandler; HandlerGroup; SubProcessHandler; CascadeHandler; MultipleInteractionHandler; HadronizationHandler; DecayHandler

Definition at line 63 of file EventHandler.h.

Member Typedef Documentation

◆ GroupVector

typedef vector<HandlerGroupBase *> ThePEG::EventHandler::GroupVector

A vector of HandlerGroups.

Definition at line 77 of file EventHandler.h.

Member Enumeration Documentation

◆ ConsistencyLevel

enum ThePEG::EventHandler::ConsistencyLevel

Enumerate the different levels of consistency checking.

Enumerator
clNoCheck	Do not perform consistency checks.
clCollision	Check every Collision.
clStep	Check every Step.
clPrintCollision	Check every Collision. Print event if inconsistent.
clPrintStep	Check every Step. Print event if inconsistent.

Definition at line 68 of file EventHandler.h.

Member Function Documentation

◆ checkConsistency()

virtual void ThePEG::EventHandler::checkConsistency ( ) const

virtual

Check that the charge and energy-momentum in the last step of the current collision is consistent with the incoming particles.

If not, a warning will be generated.

Referenced by currentStepHandler().

◆ clone()

virtual IBPtr ThePEG::EventHandler::clone ( ) const

protectedvirtual

Make a simple clone of this object.

Returns: a pointer to the new object.

Implements ThePEG::InterfacedBase.

Reimplemented in ThePEG::StandardEventHandler, and ThePEG::LesHouchesEventHandler.

Referenced by currentStepHandler().

◆ continueCollision()

tCollPtr ThePEG::EventHandler::continueCollision ( )

Continue the generation of a Collision.

Used if the generation was previously interrupted.

◆ dofinish()

virtual void ThePEG::EventHandler::dofinish ( )

inlineprotectedvirtual

Finalize this object.

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

Reimplemented from ThePEG::InterfacedBase.

Reimplemented in ThePEG::StandardEventHandler, and ThePEG::LesHouchesEventHandler.

Definition at line 416 of file EventHandler.h.

References clean(), ThePEG::InterfacedBase::dofinish(), getReferences(), and rebind().

◆ fullclone()

virtual IBPtr ThePEG::EventHandler::fullclone ( ) const

protectedvirtual

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.

Reimplemented in ThePEG::StandardEventHandler, and ThePEG::LesHouchesEventHandler.

Referenced by currentStepHandler().

◆ generateEvent() [1/3]

virtual EventPtr ThePEG::EventHandler::generateEvent ( )

virtual

Generate an event.

This base class is not capable of generating complete events and calling this function will result in an exception. Sub-classes which are capable of generating complete events from scratch must override this function.

Reimplemented in ThePEG::StandardEventHandler, and ThePEG::LesHouchesEventHandler.

◆ generateEvent() [2/3]

tEventPtr ThePEG::EventHandler::generateEvent ( tEventPtr e )

Generate an Event, where the initial state is supplied from the outside.

Returns: a pointer to the generated Event.

◆ generateEvent() [3/3]

tEventPtr ThePEG::EventHandler::generateEvent ( tStepPtr s )

Generate an Event, where the initial state is supplied as a single step from the outside.

Returns: a pointer to the generated Event.

◆ getReferences()

virtual IVector ThePEG::EventHandler::getReferences ( )

protectedvirtual

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

Returns: a vector of pointers.

Reimplemented from ThePEG::InterfacedBase.

Referenced by dofinish().

◆ histogramScale()

virtual CrossSection ThePEG::EventHandler::histogramScale ( ) const

virtual

Histogram scale.

A histogram bin which has been filled with the weights associated with the Event objects should be scaled by this factor to give the correct cross section. This version of the function will produce an error message. It is up to a sub-class able to generate full events to return the correct value.

Reimplemented in ThePEG::StandardEventHandler, and ThePEG::LesHouchesEventHandler.

◆ incoming()

const cPDPair& ThePEG::EventHandler::incoming ( ) const

inline

The pair of incoming particle types.

These are null if not set by a subclass.

Definition at line 206 of file EventHandler.h.

References theIncoming.

◆ integratedXSec()

virtual CrossSection ThePEG::EventHandler::integratedXSec ( ) const

virtual

The total integrated cross section of the processes generated in this run.

This version of the function will produce an error message. It is up to a sub-class able to generate full events to return the correct value.

Returns: 0 if no integrated cross section could be estimated.

Reimplemented in ThePEG::StandardEventHandler, and ThePEG::LesHouchesEventHandler.

◆ integratedXSecErr()

virtual CrossSection ThePEG::EventHandler::integratedXSecErr ( ) const

virtual

The estimated error in the total integrated cross section of the processes generated in this run.

This version of the function will produce an error message. It is up to a sub-class able to generate full events to return the correct value.

Returns: 0 if no integrated cross section error could be estimated.

Reimplemented in ThePEG::LesHouchesEventHandler, and ThePEG::StandardEventHandler.