Here is the documentation of the PowhegHandler class. More...

#include <PowhegHandler.h>

Inheritance diagram for Herwig::PowhegHandler:

[legend]

Public Member Functions
	PowhegHandler ()
	The default constructor.

virtual double	reweightCKKW (int minMult, int maxMult)
	Perform CKKW reweighting.

virtual HardTreePtr	generateCKKW (ShowerTreePtr tree) const
	Generate hard emissions for CKKW etc.

Public Member Functions inherited from Herwig::MatchingHandler
	MatchingHandler (bool reWeight=false)
	The default constructor.

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.

Public Member Functions inherited from Herwig::ShowerHandler
	ShowerHandler ()
	Default constructor.

virtual	~ShowerHandler ()
	Destructor.

virtual void	cascade ()
	The main method which manages the multiple interactions and starts the shower by calling cascade(sub, lastXC).

virtual bool	showerHardProcessVeto () const
	Hook to allow vetoing of event after showering hard sub-process as in e.g.

virtual bool	isReshuffling () const
	Return true, if this cascade handler will perform reshuffling from hard process masses.

virtual bool	retConstituentMasses () const
	Return true, if this cascade handler will put the final state particles to their constituent mass.

virtual bool	canHandleMatchboxTrunc () const
	Return true, if the shower handler can generate a truncated shower for POWHEG style events generated using Matchbox.

Energy	pdfFreezingScale () const
	Get the PDF freezing scale.

PDFPtr	getPDFA () const
	Get the local PDFs.

PDFPtr	getPDFB () const
	Get the local PDFs.

bool	firstInteraction () const
	Return true if currently the primary subprocess is showered.

tHwRemDecPtr	remnantDecayer () const
	Return the remnant decayer.

void	splitHardProcess (tPVector tagged, PerturbativeProcessPtr &hard, DecayProcessMap &decay) const
	Split the hard process into production and decays.

bool	doesSplitHardProcess () const
	Information if the Showerhandler splits the hard process.

tDMPtr	decay (PerturbativeProcessPtr, DecayProcessMap &decay, bool radPhotons=false) const
	Decay a particle.

tDMPtr	findDecayMode (const string &tag) const
	Cached lookup of decay modes.

bool	doRadiation () const
	Switch for any radiation.

bool	doFSR () const
	Switch on or off final state radiation.

bool	doISR () const
	Switch on or off initial state radiation.

bool	hardScaleIsMuF () const
	Return true if maximum pt should be deduced from the factorization scale.

double	factorizationScaleFactor () const
	The factorization scale factor.

double	renFac () const
	The renormalization scale factor.

double	facFac () const
	The factorization scale factor.

double	renormalizationScaleFactor () const
	The renormalization scale factor.

double	hardScaleFactor () const
	The scale factor for the hard scale.

bool	restrictPhasespace () const
	Return true, if the phase space restrictions of the dipole shower should be applied.

Ptr< HardScaleProfile >::tptr	profileScales () const
	Return profile scales.

virtual Energy	hardScale () const
	Return the relevant hard scale to be used in the profile scales.

virtual int	showerPhaseSpaceOption () const
	Return information about shower phase space choices.

map< string, ShowerVariation > &	showerVariations ()
	Access the shower variations.

const map< string, ShowerVariation > &	showerVariations () const
	Return the shower variations.

map< string, double > &	currentWeights ()
	Access the current Weights.

const map< string, double > &	currentWeights () const
	Return the current Weights.

void	reweight (double w)
	Change the current reweighting factor.

double	reweight () const
	Return the current reweighting factor.

unsigned int	spinCorrelations () const
	Access to switches for spin correlations.

virtual bool	correlations () const
	Any correlations.

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.

bool	decaysInShower (long id) const
	Check if a particle decays in the shower.

Public Member Functions inherited from ThePEG::CascadeHandler
virtual void	handle (EventHandler &eh, const tPVector &tagged, const Hint &hint)

virtual void	cascade ()=0

virtual double	reweightCKKW (int minMult, int maxMult)

const tPVector &	tagged () const

const Hint &	hint () const

const PDF &	firstPDF () const

const PDF &	secondPDF () const

const pair< PDF, PDF > &	pdfs () const

void	resetPDFs (const pair< tcPDFPtr, tcPDFPtr > &pdfpair)

void	resetPDFs (const pair< tcPDFPtr, tcPDFPtr > &pdfpair, PBPair ppair)

void	setXComb (tXCombPtr xc)

virtual bool	isReshuffling () const

bool	didRunCascade () const

virtual void	handle (EventHandler &eh, const tPVector &tagged, const Hint &hint)

virtual void	cascade ()=0

virtual double	reweightCKKW (int minMult, int maxMult)

Public Member Functions inherited from ThePEG::StepHandler
virtual void	handle (EventHandler &eh, const tPVector &tagged, const Hint &hint)=0

tEHPtr	eventHandler () const

void	eventHandler (tEHPtr)

tStepPtr	newStep ()

tStepPtr	currentStep ()

virtual void	handle (EventHandler &eh, const tPVector &tagged, const Hint &hint)=0

Public Member Functions inherited from ThePEG::HandlerBaseT< UseRandom >
double	rnd () const

double	rnd (double xu) const

double	rnd (double xl, double xu) const

bool	rndbool () const

bool	rndbool (double p) const

bool	rndbool (double p1, double p2) const

int	rndsign (double p1, double p2, double p3) const

int	rnd2 (double p0, double p1) const

int	rnd3 (double p0, double p1, double p2) const

int	rnd4 (double p0, double p1, double p2, double p3) const

long	irnd (long xu=2) const

long	irnd (long xl, long xu) const

const StandardModelBase &	SM () const

tSMPtr	standardModel () const

Public Member Functions inherited from ThePEG::Interfaced
virtual bool	defaultInit ()

PPtr	getParticle (PID) const

PDPtr	getParticleData (PID) const

bool	used () const

void	useMe () const

tEGPtr	generator () const

void	persistentOutput (PersistentOStream &os) const

void	persistentInput (PersistentIStream &is, int version)

PPtr	getParticle (PID) const

PDPtr	getParticleData (PID) const

bool	used () const

void	useMe () const

tEGPtr	generator () const

Public Member Functions inherited from ThePEG::InterfacedBase
string	fullName () const

string	name () const

string	path () const

string	comment () const

void	setup (istream &is)

void	update ()

void	init ()

virtual bool	preInitialize () const

void	initrun ()

void	finish ()

void	touch ()

void	reset ()

void	clear ()

InitState	state () const

bool	locked () const

bool	touched () const

virtual IBPtr	fullclone () const

void	persistentOutput (PersistentOStream &os) const

void	persistentInput (PersistentIStream &is, int version)

virtual void	debugme () const

void	update ()

void	init ()

virtual bool	preInitialize () const

void	initrun ()

void	finish ()

void	touch ()

void	reset ()

void	clear ()

InitState	state () const

bool	locked () const

bool	touched () const

virtual IBPtr	fullclone () const

Public Member Functions inherited from ThePEG::Base
void	debug () const

virtual void	debugme () const

Public Member Functions inherited from ThePEG::Pointer::ReferenceCounted
CounterType	referenceCount () const

Public Member Functions inherited from ThePEG::Named
	Named (const string &newName=string())

	Named (const Named &)=default

const string &	name () const

bool	operator== (const Named &other) const

bool	operator< (const Named &other) const

Public Member Functions inherited from ThePEG::LastXCombInfo< typename XC >
const XC &	lastXComb () const

tXCPtr	lastXCombPtr () const

const XC &	lastHeadXComb () const

tXCPtr	lastHeadXCombPtr () const

const EventHandler &	lastEventHandler () const

tPExtrPtr	lastExtractor () const

PDFT	pdf (tcPPtr parton) const

const Cuts &	lastCuts () const

tCutsPtr	lastCutsPtr () const

const PPair &	lastParticles () const

Energy2	lastS () const

const PPair &	lastPartons () const

Energy2	lastSHat () const

double	lastTau () const

double	lastY () const

double	lastP1 () const

double	lastP2 () const

double	lastL1 () const

double	lastL2 () const

double	lastX1 () const

double	lastX2 () const

double	lastE1 () const

double	lastE2 () const

double	lastFL1L2 () const

Energy2	lastScale () const

double	lastAlphaS () const

double	lastAlphaEM () const

const vector< Lorentz5Momentum > &	meMomenta () const

double	lastME2 () const

double	lastPreweight () const

double	jacobian () const

CrossSection	lastMECrossSection () const

double	lastMEPDFWeight () const

double	lastMECouplings () const

tSubProPtr	subProcess () const

const cPDVector &	mePartonData () const

const XC &	lastXComb () const

tXCPtr	lastXCombPtr () const

const XC &	lastHeadXComb () const

tXCPtr	lastHeadXCombPtr () const

const EventHandler &	lastEventHandler () const

tPExtrPtr	lastExtractor () const

PDFT	pdf (tcPPtr parton) const

const Cuts &	lastCuts () const

tCutsPtr	lastCutsPtr () const

const PPair &	lastParticles () const

Energy2	lastS () const

const PPair &	lastPartons () const

Energy2	lastSHat () const

double	lastTau () const

double	lastY () const

double	lastP1 () const

double	lastP2 () const

double	lastL1 () const

double	lastL2 () const

double	lastX1 () const

double	lastX2 () const

double	lastE1 () const

double	lastE2 () const

double	lastFL1L2 () const

Clone Methods.
unsigned int	pTDefinition_
	Control over the selection of the maximum \(p_T\) for emission.

Energy	maxpT_
	Maximum pT for the shower for non-emission events.

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.

PowhegHandler &	operator= (const PowhegHandler &)=delete
	The assignment operator is private and must never be called.

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 void	Init ()
	The standard Init function used to initialize the interfaces.

virtual double	sudakovWeight (CKKWTreePtr)
	Calculate the Sudakov weight.

virtual PotentialTree	chooseHardTree (double totalWeight, double nonOrderedWeight)
	Select the hard tree.

Additional Inherited Members
Public Types inherited from Herwig::ShowerHandler
typedef pair< tRemPPtr, tRemPPtr >	RemPair
	Typedef for a pair of ThePEG::RemnantParticle pointers.

typedef multiset< tcPDPtr, ParticleOrdering >	OrderedParticles
	A container for ordered particles required for constructing tags for decay mode lookup.

Public Types inherited from ThePEG::InterfacedBase
enum	InitState

Public Types inherited from ThePEG::Pointer::ReferenceCounted
typedef unsigned int	CounterType

Public Types inherited from ThePEG::LastXCombInfo< typename XC >
typedef ThePEG::Ptr< XC >::pointer	XCPtr

typedef ThePEG::Ptr< XC >::const_pointer	cXCPtr

typedef ThePEG::Ptr< XC >::transient_pointer	tXCPtr

typedef ThePEG::Ptr< XC >::transient_const_pointer	tcXCPtr

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

Static Public Member Functions inherited from Herwig::ShowerHandler
static const tShowerHandlerPtr	currentHandler ()
	pointer to "this", the current ShowerHandler.

static bool	currentHandlerIsSet ()
	pointer to "this", the current ShowerHandler.

static void	Init ()
	The standard Init function used to initialize the interfaces.

Static Public Member Functions inherited from ThePEG::CascadeHandler
static void	setDidRunCascade (bool c)

static void	Init ()

Static Public Member Functions inherited from ThePEG::StepHandler
static void	Init ()

Static Public Member Functions inherited from ThePEG::HandlerBase
static void	Init ()

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

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

Static Public Member Functions inherited from ThePEG::Base
static void	Init ()

Public Attributes inherited from ThePEG::InterfacedBase
	initializing

	uninitialized

	initialized

	runready

Public Attributes inherited from ThePEG::Pointer::ReferenceCounted
const unsigned long	uniqueId

Protected Member Functions inherited from Herwig::MatchingHandler
virtual void	doinit ()
	Initialize this object after the setup phase before saving an EventGenerator to disk.

MEPtr	matrixElement () const
	Access to the core matrix element.

HwMEBasePtr	HWMatrixElement () const
	Access to the core Hw++ matrix element.

PExtrPtr	partonExtractor ()
	The PartonExtractor object used to construct remnants.

PartonPairVec	partonBins ()
	The pairs of PartonBin objects describing the partons which can be extracted by the PartonExtractor object.

void	partonBins (PartonPairVec bins)
	The pairs of PartonBin objects describing the partons which can be extracted by the PartonExtractor object.

CutsPtr &	cuts ()
	The Cuts object to be used for this reader.

void	initialiseMatching (int minMult, int maxMult)
	Initialise the matching.

ShowerAlphaPtr	alphaS ()
	Pointer to the object calculating the strong coupling.

bool	rejectNonAngularOrdered ()
	whether to just reject event if there are no angular ordered histories (true) or to choose one of the non angular ordered histories (false)

bool	rejectNoShowerHistory ()
	whether to reject events (true) for which there is no parton shower interpretation or just shower them with no reweighting

Energy2	sHat () const
	Access to basic info on the event.

void	sHat (Energy2 in)
	Centre of mass energy.

Energy	pdfScale () const
	The fixed factorization scale used in the MEs.

void	pdfScale (Energy in)
	The fixed factorization scale used in the MEs.

double	alphaSMG () const
	The fixed alphaS value that was used to generate parton configurations.

void	alphaSMG (double in)
	The fixed alphaS value that was used to generate parton configurations.

bool	noShowerHistory ()
	Whether we are treating an event with no shower interpretation.

bool	highestMult () const
	whether the current event is a highest multiplicity event.

bool	lowestMult () const
	whether the current event is a lowest multiplicity event

set< ProtoBranchingPtr > &	protoBranchings ()
	Storage of potential shower interpretations.

set< ProtoTreePtr > &	protoTrees ()
	The ProtoTrees which will become CKKWTrees.

PotentialTree &	hardTree ()
	Access to the select tree.

void	hardTree (PotentialTree in)
	Access to the select tree.

CKKWTreePtr	getCKKWTree () const
	access to the hard tree object

vector< pair< PotentialTree, double > > &	hardTrees ()
	The possible shower configurations that are angular-ordered.

vector< pair< PotentialTree, double > > &	nonOrderedTrees ()
	The possible shower configurations that are not angular-ordered.

double	getDiagram (PotentialTree &)
	Returns the diagram corresponding to the (leading-order) hardTree.

void	fillProtoTrees (ProtoTreePtr)
	Recursive function to find all possible clustered trees.

bool	updateSubProcess ()
	update sub process based on the CKKWTree and Diagram

PotentialTree	doClustering ()
	Creates all (ordered) cluster histories and selects one.

tProtoBranchingPtr	getCluster (tProtoBranchingPtr, tProtoBranchingPtr)
	Function looks to see if a cluster of the branchings already exists in protoBranchings_ if so returns the pointer to that protoBranching if not creates the hardBranchings, adds it to protoBranchings and returns the pointer.

bool	repeatProtoTree (ProtoTreePtr currentProtoTree)
	Checks whether a ProtoTree containing the same branchings already exists in protoTrees_ in which case the current tree is a repeat and should be removed (and not recursed)

BranchingElement	allowedFinalStateBranching (tProtoBranchingPtr &, tProtoBranchingPtr &)
	Returns the branching element for an FS-FS clustering.

BranchingElement	allowedInitialStateBranching (tProtoBranchingPtr &, tProtoBranchingPtr &)
	Returns the branching element for an IS-FS clustering.

void	findDecayingParticles (PPtr parent)
	Find decaying particles.

map< PPtr, ParticleVector >::const_iterator	parent (PPtr parent)
	Check if a decayed particle.

void	addDecayProducts (SubProPtr subProcess, PPtr parent, map< PPtr, ParticleVector >::const_iterator decay, const LorentzRotation &boost) const
	Add the decay products of a particle to the new SubProcess.

Protected Member Functions inherited from Herwig::ShowerHandler
virtual tPPair	cascade (tSubProPtr sub, XCPtr xcomb)
	The main method which manages the showering of a subprocess.

void	prepareCascade (tSubProPtr sub)
	Set up for the cascade.

void	boostCollision (bool boost)
	Boost all the particles in the collision so that the collision always occurs in the rest frame with the incoming particles along the z axis.

void	setCurrentHandler ()
	Set/unset the current shower handler.

void	unSetCurrentHandler ()
	Unset the current handler.

tSubProPtr	currentSubProcess () const
	Return the currently used SubProcess.

tPPair	incomingBeams () const
	Access to the incoming beam particles.

void	combineWeights ()
	Weight handling for shower variations.

void	initializeWeights ()
	Initialise the weights in currentEvent()

void	resetWeights ()
	Reset the current weights.

unsigned int	maxtry () const
	Return the maximum number of attempts for showering a given subprocess.

bool	includeSpaceTime () const
	Parameters for the space-time model.

Energy2	vMin () const
	The minimum virtuality for the space-time model.

virtual void	doinitrun ()
	Initialize this object.

virtual void	dofinish ()
	Finalize this object.

bool	isMPIOn () const
	Return true if multiple parton interactions are switched on and can be used for this beam setup.

tUEBasePtr	getMPIHandler () const
	Access function for the MPIHandler, it should only be called after checking with isMPIOn.

bool	isResolvedHadron (tPPtr)
	Is a beam particle where hadronic structure is resolved.

RemPair	getRemnants (PBIPair incbins)
	Get the remnants from the ThePEG::PartonBinInstance es and do some checks.

void	setMPIPDFs ()
	Reset the PDF's after the hard collision has been showered.

void	findDecayProducts (PPtr parent, PerturbativeProcessPtr hard, DecayProcessMap &decay) const
	Members to handle splitting up of hard process and decays.

void	createDecayProcess (PPtr parent, PerturbativeProcessPtr hard, DecayProcessMap &decay) const
	Find decay products from the hard process and create decay processes.

Protected Member Functions inherited from ThePEG::StepHandler
void	createNewStep ()

Protected Member Functions inherited from ThePEG::Interfaced
void	reporeg (IBPtr object, string name) const

bool	setDefaultReference (PtrT &ptr, string classname, string objectname)

	Interfaced (const string &newName)

	Interfaced (const Interfaced &i)

void	setGenerator (tEGPtr generator)

Protected Member Functions inherited from ThePEG::InterfacedBase
virtual void	readSetup (istream &is)

virtual void	doupdate ()

virtual void	doinit ()

virtual void	doinitrun ()

virtual void	dofinish ()

virtual IVector	getReferences ()

virtual void	rebind (const TranslationMap &)

virtual IBPtr	clone () const=0

	InterfacedBase (string newName)

	InterfacedBase (const InterfacedBase &i)

virtual void	readSetup (istream &is)

virtual void	doupdate ()

virtual void	doinit ()

virtual void	doinitrun ()

virtual void	dofinish ()

virtual IVector	getReferences ()

virtual void	rebind (const TranslationMap &)

Protected Member Functions inherited from ThePEG::Pointer::ReferenceCounted
	ReferenceCounted (const ReferenceCounted &)

ReferenceCounted &	operator= (const ReferenceCounted &)

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

const string &	name (const string &newName)

Static Protected Member Functions inherited from ThePEG::Interfaced
static void	registerRepository (IBPtr)

static void	registerRepository (IBPtr, string newName)

Protected Attributes inherited from ThePEG::LastXCombInfo< typename XC >
XCPtr	theLastXComb

Detailed Description

Here is the documentation of the PowhegHandler class.

See also: The interfaces defined for PowhegHandler.

Definition at line 20 of file PowhegHandler.h.

Constructor & Destructor Documentation

◆ PowhegHandler()

Herwig::PowhegHandler::PowhegHandler ( )

inline

The default constructor.

Definition at line 27 of file PowhegHandler.h.

Member Function Documentation

◆ chooseHardTree()

virtual PotentialTree Herwig::PowhegHandler::chooseHardTree	(	double	totalWeight,
		double	nonOrderedWeight
	)

protectedvirtual

Select the hard tree.

Implements Herwig::MatchingHandler.

◆ clone()

virtual IBPtr Herwig::PowhegHandler::clone ( ) const

protectedvirtual

Make a simple clone of this object.

Returns: a pointer to the new object.

Reimplemented from Herwig::ShowerHandler.

◆ fullclone()

virtual IBPtr Herwig::PowhegHandler::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 Herwig::ShowerHandler.

◆ Init()

static void Herwig::PowhegHandler::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.

◆ operator=()

PowhegHandler & Herwig::PowhegHandler::operator= ( const PowhegHandler & )

privatedelete

The assignment operator is private and must never be called.

In fact, it should not even be implemented.

◆ persistentInput()

void Herwig::PowhegHandler::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.

◆ persistentOutput()

void Herwig::PowhegHandler::persistentOutput ( PersistentOStream & os ) const

Function used to write out object persistently.

Parameters

os	the persistent output stream written to.

◆ reweightCKKW()

virtual double Herwig::PowhegHandler::reweightCKKW	(	int	minMult,
		int	maxMult
	)

virtual

Perform CKKW reweighting.

Reimplemented from ThePEG::CascadeHandler.

◆ sudakovWeight()

virtual double Herwig::PowhegHandler::sudakovWeight ( CKKWTreePtr )

inlineprotectedvirtual

Calculate the Sudakov weight.

Implements Herwig::MatchingHandler.

Definition at line 69 of file PowhegHandler.h.

Member Data Documentation

◆ maxpT_

Energy Herwig::PowhegHandler::maxpT_

private

Maximum pT for the shower for non-emission events.

Definition at line 111 of file PowhegHandler.h.

◆ pTDefinition_

unsigned int Herwig::PowhegHandler::pTDefinition_

private

Control over the selection of the maximum \(p_T\) for emission.

Definition at line 106 of file PowhegHandler.h.

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

PowhegHandler.h

Public Member Functions

Clone Methods.

Functions used by the persistent I/O system.

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ PowhegHandler()

Member Function Documentation

◆ chooseHardTree()

◆ clone()

◆ fullclone()

◆ Init()

◆ operator=()

◆ persistentInput()

◆ persistentOutput()

◆ reweightCKKW()

◆ sudakovWeight()

Member Data Documentation

◆ maxpT_

◆ pTDefinition_