The MEPP2WHPowheg class provides the next-to-leading order matrix elements for \(W^\pm\) in assoication with a Higgs boson in the PoOWHEG scheme. More...

#include <MEPP2WHPowheg.h>

Inheritance diagram for Herwig::MEPP2WHPowheg:

[legend]

Public Member Functions
	MEPP2WHPowheg ()
	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().

Public Member Functions inherited from Herwig::MEPP2WH
	MEPP2WH ()
	Default constructor.

virtual void	getDiagrams () const
	Add all possible diagrams with the add() function.

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::MEfftoVH
	MEfftoVH ()
	The default constructor.

virtual unsigned int	orderInAlphaS () const
	Return the order in \(\alpha_S\) in which this matrix element is given.

virtual unsigned int	orderInAlphaEW () const
	Return the order in \(\alpha_{EW}\) in which this matrix element is given.

virtual double	me2 () const
	The matrix element for the kinematical configuration previously provided by the last call to setKinematics(), suitably scaled by sHat() to give a dimension-less number.

virtual void	setKinematics ()
	Set the typed and momenta of the incoming and outgoing partons to be used in subsequent calls to me() and colourGeometries() according to the associated XComb object.

virtual Selector< DiagramIndex >	diagrams (const DiagramVector &dv) const
	Get diagram selector.

virtual Selector< const ColourLines * >	colourGeometries (tcDiagPtr diag) const
	Return a Selector with possible colour geometries for the selected diagram weighted by their relative probabilities.

virtual void	constructVertex (tSubProPtr)
	Construct the vertex of spin 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.

Public Member Functions inherited from Herwig::DrellYanBase
	DrellYanBase ()
	The default constructor.

virtual POWHEGType	hasPOWHEGCorrection ()
	Has a POWHEG style correction.

virtual bool	hasMECorrection ()
	Has an old fashioned ME correction.

virtual void	initializeMECorrection (RealEmissionProcessPtr, double &initial, double &final)
	Initialize the ME correction.

virtual RealEmissionProcessPtr	applyHardMatrixElementCorrection (RealEmissionProcessPtr)
	Apply the hard matrix element correction to a given hard process or decay.

virtual bool	softMatrixElementVeto (PPtr parent, PPtr progenitor, const bool &fs, const Energy &highestpT, const vector< tcPDPtr > &ids, const double &z, const Energy &scale, const Energy &pT)
	Apply the soft matrix element correction.

virtual RealEmissionProcessPtr	generateHardest (RealEmissionProcessPtr, ShowerInteraction)
	Apply the POWHEG style correction.

virtual void	setKinematics ()
	Set the typed and momenta of the incoming and outgoing partons to be used in subsequent calls to me() and colourGeometries() according to the associated XComb object.

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::HwMEBase
	HwMEBase ()
	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 ThePEG::MEBase
virtual unsigned int	orderInAlphaS () const=0

virtual unsigned int	orderInAlphaEW () const=0

virtual double	me2 () const=0

virtual Energy2	scale () const=0

virtual double	alphaS () const

virtual double	alphaEM () const

void	setKinematics (tPPair in, const PVector &out)

virtual void	setKinematics ()

virtual void	constructVertex (tSubProPtr sub)

virtual void	constructVertex (tSubProPtr sub, const ColourLines *cl)

virtual int	nDim () const

virtual bool	generateKinematics (const double *r)=0

virtual bool	wantCMS () const

virtual bool	headCuts () const

virtual bool	ignoreCuts () const

virtual bool	apply () const

virtual CrossSection	dSigHatDR () const=0

virtual map< string, double >	generateOptionalWeights ()

virtual bool	haveX1X2 () const

virtual bool	havePDFWeight1 () const

virtual bool	havePDFWeight2 () const

virtual bool	keepRandomNumbers () const

virtual void	generateSubCollision (SubProcess &)

virtual void	clearKinematics ()

virtual void	getDiagrams () const=0

virtual bool	noMirror () const

const DiagramVector &	diagrams () const

virtual Selector< const ColourLines * >	colourGeometries (tcDiagPtr diag) const=0

virtual const ColourLines &	selectColourGeometry (tcDiagPtr diag) const

virtual Selector< DiagramIndex >	diagrams (const DiagramVector &) const

virtual DiagramIndex	diagram (const DiagramVector &) const

bool	reweighted () const

double	reWeight () const

double	preWeight () const

void	addReweighter (tReweightPtr rw)

void	addPreweighter (tReweightPtr rw)

Ptr< Amplitude >::pointer	amplitude () const

void	amplitude (Ptr< Amplitude >::pointer amp)

Energy2	sHat () const

double	preweight () const

virtual void	flushCaches ()

virtual StdXCombPtr	makeXComb (Energy newMaxEnergy, const cPDPair &inc, tEHPtr newEventHandler, tSubHdlPtr newSubProcessHandler, tPExtrPtr newExtractor, tCascHdlPtr newCKKW, const PBPair &newPartonBins, tCutsPtr newCuts, const DiagramVector &newDiagrams, bool mir, const PartonPairVec &allPBins, tStdXCombPtr newHead=tStdXCombPtr(), tMEPtr newME=tMEPtr())

virtual StdXCombPtr	makeXComb (tStdXCombPtr newHead, const PBPair &newPartonBins, const DiagramVector &newDiagrams, tMEPtr newME=tMEPtr())

virtual void	fillProjectors ()

virtual void	setXComb (tStdXCombPtr)

const DVector &	meInfo () const

void	meInfo (const DVector &info) const

virtual int	maxMultCKKW () const

virtual int	minMultCKKW () const

virtual void	maxMultCKKW (int mult)

virtual void	minMultCKKW (int mult)

virtual void	setVetoScales (tSubProPtr) const

virtual unsigned int	orderInAlphaS () const=0

virtual unsigned int	orderInAlphaEW () const=0

virtual double	me2 () const=0

virtual Energy2	scale () const=0

virtual double	alphaS () const

virtual double	alphaEM () const

void	setKinematics (tPPair in, const PVector &out)

virtual void	setKinematics ()

virtual void	constructVertex (tSubProPtr sub)

virtual void	constructVertex (tSubProPtr sub, const ColourLines *cl)

virtual int	nDim () const

virtual bool	generateKinematics (const double *r)=0

virtual bool	wantCMS () const

virtual bool	headCuts () const

virtual bool	ignoreCuts () const

virtual bool	apply () const

virtual CrossSection	dSigHatDR () const=0

virtual map< string, double >	generateOptionalWeights ()

virtual bool	haveX1X2 () const

virtual bool	havePDFWeight1 () const

virtual bool	havePDFWeight2 () const

virtual bool	keepRandomNumbers () const

virtual void	generateSubCollision (SubProcess &)

virtual void	clearKinematics ()

virtual void	getDiagrams () const=0

virtual bool	noMirror () const

const DiagramVector &	diagrams () const

virtual Selector< const ColourLines * >	colourGeometries (tcDiagPtr diag) const=0

virtual const ColourLines &	selectColourGeometry (tcDiagPtr diag) const

virtual Selector< DiagramIndex >	diagrams (const DiagramVector &) const

virtual DiagramIndex	diagram (const DiagramVector &) const

bool	reweighted () const

double	reWeight () const

double	preWeight () const

void	addReweighter (tReweightPtr rw)

void	addPreweighter (tReweightPtr rw)

Ptr< Amplitude >::pointer	amplitude () const

void	amplitude (Ptr< Amplitude >::pointer amp)

Energy2	sHat () const

double	preweight () const

virtual void	flushCaches ()

virtual StdXCombPtr	makeXComb (Energy newMaxEnergy, const cPDPair &inc, tEHPtr newEventHandler, tSubHdlPtr newSubProcessHandler, tPExtrPtr newExtractor, tCascHdlPtr newCKKW, const PBPair &newPartonBins, tCutsPtr newCuts, const DiagramVector &newDiagrams, bool mir, const PartonPairVec &allPBins, tStdXCombPtr newHead=tStdXCombPtr(), tMEPtr newME=tMEPtr())

virtual StdXCombPtr	makeXComb (tStdXCombPtr newHead, const PBPair &newPartonBins, const DiagramVector &newDiagrams, tMEPtr newME=tMEPtr())

virtual void	fillProjectors ()

virtual void	setXComb (tStdXCombPtr)

const DVector &	meInfo () const

void	meInfo (const DVector &info) const

virtual int	maxMultCKKW () const

virtual int	minMultCKKW () const

virtual void	maxMultCKKW (int mult)

virtual void	minMultCKKW (int mult)

virtual void	setVetoScales (tSubProPtr) const

void	persistentOutput (PersistentOStream &os) const

void	persistentInput (PersistentIStream &is, int version)

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< StandardXComb >
const XC &	lastXComb () const

const XC &	lastXComb () const

tXCPtr	lastXCombPtr () const

tXCPtr	lastXCombPtr () const

const XC &	lastHeadXComb () const

const XC &	lastHeadXComb () const

tXCPtr	lastHeadXCombPtr () const

tXCPtr	lastHeadXCombPtr () const

const EventHandler &	lastEventHandler () const

const EventHandler &	lastEventHandler () const

tPExtrPtr	lastExtractor () const

tPExtrPtr	lastExtractor () const

PDFT	pdf (tcPPtr parton) const

PDFT	pdf (tcPPtr parton) const

const Cuts &	lastCuts () const

const Cuts &	lastCuts () const

tCutsPtr	lastCutsPtr () const

tCutsPtr	lastCutsPtr () const

const PPair &	lastParticles () const

const PPair &	lastParticles () const

Energy2	lastS () const

Energy2	lastS () const

const PPair &	lastPartons () const

const PPair &	lastPartons () const

Energy2	lastSHat () const

Energy2	lastSHat () const

double	lastTau () const

double	lastTau () const

double	lastY () const

double	lastY () const

double	lastP1 () const

double	lastP1 () const

double	lastP2 () const

double	lastP2 () const

double	lastL1 () const

double	lastL1 () const

double	lastL2 () const

double	lastL2 () const

double	lastX1 () const

double	lastX1 () const

double	lastX2 () const

double	lastX2 () const

double	lastE1 () const

double	lastE1 () const

double	lastE2 () const

double	lastE2 () const

double	lastFL1L2 () 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

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.

Protected Member Functions inherited from Herwig::MEPP2WH
Protected Member Functions inherited from Herwig::MEfftoVH
double	helicityME (vector< SpinorWaveFunction > &fin, vector< SpinorBarWaveFunction > &ain, vector< SpinorBarWaveFunction > &fout, vector< SpinorWaveFunction > &aout, bool me) const
	Matrix element for \(f\bar{f}\to V h^0\to f'\bar{f'} h^0\).

PDPtr	WPlus () const
	Access to the vector ParticleData objects.

PDPtr	WMinus () const
	Access to the \(W^-\) data.

PDPtr	Z0 () const
	Access to the \(Z^0\) data.

PDPtr	higgs () const
	Access to the higgs data.

void	higgs (PDPtr in)
	Set the higgs data.

void	setWWHVertex (AbstractVVSVertexPtr in)
	Set the pointer to the vector-vector-Higgs vertex.

void	lineShape (unsigned int in)
	Set the line shape treatment.

unsigned int	maxFlavour () const
	Maximum flavour of the incoming partons.

Protected Member Functions inherited from Herwig::DrellYanBase
bool	applyHard (ParticleVector &quarks, vector< tcBeamPtr > beams, Lorentz5Momentum boson, unsigned int &iemit, unsigned int &itype, vector< Lorentz5Momentum > &pnew, LorentzRotation &trans, pair< double, double > &xnew, Energy2 shad)
	Return the momenta and type of hard matrix element correction.

double	getResult (int emis_type, Energy pt, double yj)
	Returns the matrix element for a given type of process, rapidity of the jet \(y_j\) and transverse momentum \(p_T\).

bool	getEvent (vector< Lorentz5Momentum > &pnew, int &emissiontype)
	generates the hardest emission (yj,p)

virtual void	dofinish ()
	Finalize this object.

Protected Member Functions inherited from Herwig::HwMEBase
Energy2	tHat () const
	Return the \(\hat{t}\) of the last set phase space point.

Energy2	uHat () const
	Return the \(\hat{u}\) of the last set phase space point.

double	phi () const
	Return the azimuth angle of the last set phase space point.

void	tHat (Energy2 e2)
	Set the \(\hat{t}\) of the last set phase space point.

void	uHat (Energy2 e2)
	Set the \(\hat{u}\) of the last set phase space point.

void	phi (double phi)
	Set the azimuth angle of the last set phase space point.

void	massOption (vector< unsigned int > iopt)
	Set the treatment of the outgoing masses.

void	rescalingOption (unsigned int iopt)
	Rescaled momenta for the helicity ME.

bool	rescaleMomenta (const vector< Lorentz5Momentum > &, const cPDVector &)
	rescale the momenta for the computation of the helicity matrix element

const vector< Lorentz5Momentum > &	rescaledMomenta () const
	Access to the rescaled momenta.

bool	generateMasses (vector< Energy > &masses, double &mjac, const double *r)
	Generate the masses of the particles.

virtual double	getCosTheta (double cthmin, double cthmax, const double r)
	Used internally by generateKinematics, after calculating the limits on cos(theta).

Protected Member Functions inherited from ThePEG::MEBase
virtual void	doinit ()

virtual void	doinitrun ()

void	add (DiagPtr dp) const

vector< Lorentz5Momentum > &	meMomenta ()

void	lastME2 (double v) const

void	lastPreweight (double w) const

void	lastMECrossSection (CrossSection v) const

void	lastMEPDFWeight (double v) const

void	lastMECouplings (double v) const

void	jacobian (double j)

void	use (tcMEPtr other)

void	useDiagrams (tcMEPtr other) const

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)

Standard Interfaced functions.
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 \(T_R\) colour factor.

const double	CF_
	The \(C_F\) colour factor.

double	_alphaS2Pi
	The value of \(\frac{\alpha_S}{2\pi}\) used for the calculation.

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.

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 \(v\) angular variable.

double	_oldq
	Values of the PDF's before radiation.

double	_oldqbar
	For the antiquark.

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

MEPP2WHPowheg &	operator= (const MEPP2WHPowheg &)=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.

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 \(x=M_{B}^2/s\) from the integration variables.

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 \(x\).

double	Ltilde_qg (double x, double v) const
	Calculate the ratio of the radiative luminosity funcion to the Born luminosity function for the \(qg\) initiated channel.

double	Ltilde_gq (double x, double v) const
	Calculate the ratio of the radiative luminosity funcion to the Born luminosity function for the \(g\bar{q}\) initiated channel.

double	Ltilde_qq (double x, double v) const
	Calculate the ratio of the radiative luminosity funcion to the Born luminosity function for the \(q\bar{q}\) initiated channel.

double	Vtilde_qq () const
	Calculate the soft-virtual contribution to the NLO weight.

double	Ccalbar_qg (double x) const
	Function for calculation of the \(g\bar{q}\) and \(g\bar{q}\) initiated real contribution.

double	Fcal_qg (double x, double v) const
	Function for calculation of the \(qg\) initiated real contribution.

double	Fcal_gq (double x, double v) const
	Function for calculation of the \(g\bar{q}\) initiated real contribution.

double	Fcal_qq (double x, double v) const
	Function for calculation of the \(q\bar{q}\) initiated real contribution.

double	Ftilde_qg (double xt, double v) const
	Function for calculation of the \(qg\) initiated real contribution.

double	Ftilde_gq (double xt, double v) const
	Function for calculation of the \(g\bar{q}\) initiated real contribution.

double	Ftilde_qq (double xt, double v) const
	Function for calculation of the \(q\bar{q}\) initiated real contribution.

double	Ctilde_qg (double x, double v) const
	Function for calculation of the \(qg\) initiated real contribution.

double	Ctilde_gq (double x, double v) const
	Function for calculation of the \(g\bar{q}\) initiated real contribution.

double	Ctilde_qq (double x, double v) const
	Function for calculation of the \(q\bar{q}\) initiated real contribution.

Additional Inherited Members
Public Types inherited from Herwig::HwMEBase
enum	POWHEGType { No , ISR , FSR , Both }
	Virtual members to be overridden by inheriting classes which implement hard corrections. More...

Public Types inherited from ThePEG::MEBase
typedef vector< DiagPtr >	DiagramVector

typedef DiagramVector::size_type	DiagramIndex

typedef vector< ReweightPtr >	ReweightVector

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< StandardXComb >
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::MEPP2WH
static void	Init ()
	The standard Init function used to initialize the interfaces.

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

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

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

Static Public Member Functions inherited from ThePEG::MEBase
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

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

static void	registerRepository (IBPtr, string newName)

Protected Attributes inherited from ThePEG::LastXCombInfo< StandardXComb >
XCPtr	theLastXComb

Detailed Description

The MEPP2WHPowheg class provides the next-to-leading order matrix elements for \(W^\pm\) in assoication with a Higgs boson in the PoOWHEG scheme.

See also: The interfaces defined for MEPP2WHPowheg.

Definition at line 23 of file MEPP2WHPowheg.h.

Member Function Documentation

◆ clone()

virtual IBPtr Herwig::MEPP2WHPowheg::clone ( ) const

inlineprotectedvirtual

Make a simple clone of this object.

Returns: a pointer to the new object.

Reimplemented from Herwig::MEPP2WH.

Definition at line 207 of file MEPP2WHPowheg.h.

◆ doinit()

virtual void Herwig::MEPP2WHPowheg::doinit ( )

protectedvirtual

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

Exceptions

InitException if object could not be initialized properly.

Reimplemented from Herwig::MEPP2WH.

◆ dSigHatDR()

virtual CrossSection Herwig::MEPP2WHPowheg::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.

◆ fullclone()

virtual IBPtr Herwig::MEPP2WHPowheg::fullclone ( ) const

inlineprotectedvirtual

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::MEPP2WH.

Definition at line 213 of file MEPP2WHPowheg.h.

◆ generateKinematics()

virtual bool Herwig::MEPP2WHPowheg::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.

◆ Init()

static void Herwig::MEPP2WHPowheg::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.

◆ nDim()

virtual int Herwig::MEPP2WHPowheg::nDim ( ) const

virtual

The number of internal degreed of freedom used in the matrix element.

Reimplemented from Herwig::MEfftoVH.

◆ operator=()

MEPP2WHPowheg & Herwig::MEPP2WHPowheg::operator= ( const MEPP2WHPowheg & )

privatedelete

The assignment operator is private and must never be called.

In fact, it should not even be implemented.

◆ persistentInput()

void Herwig::MEPP2WHPowheg::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::MEPP2WHPowheg::persistentOutput ( PersistentOStream & os ) const

Function used to write out object persistently.

Parameters

os	the persistent output stream written to.

◆ scale()

virtual Energy2 Herwig::MEPP2WHPowheg::scale ( ) const

virtual

Return the scale associated with the last set phase space point.

Reimplemented from Herwig::MEfftoVH.

Member Data Documentation

◆ _a

double Herwig::MEPP2WHPowheg::_a

private

The magnitude of the correction term to reduce the negative contribution.

Definition at line 320 of file MEPP2WHPowheg.h.

◆ _alphaS2Pi

double Herwig::MEPP2WHPowheg::_alphaS2Pi

mutableprivate

The value of \(\frac{\alpha_S}{2\pi}\) used for the calculation.

Definition at line 286 of file MEPP2WHPowheg.h.

◆ _contrib

unsigned int Herwig::MEPP2WHPowheg::_contrib

Definition at line 336 of file MEPP2WHPowheg.h.

◆ _v

double Herwig::MEPP2WHPowheg::_v

private

The \(v\) angular variable.

Definition at line 361 of file MEPP2WHPowheg.h.

◆ _xb_a

double Herwig::MEPP2WHPowheg::_xb_a

mutableprivate

The momentum fraction of the first parton in the Born process.

Definition at line 241 of file MEPP2WHPowheg.h.

◆ _xb_b

double Herwig::MEPP2WHPowheg::_xb_b

mutableprivate

The momentum fraction of the second parton in the Born process.

Definition at line 246 of file MEPP2WHPowheg.h.

◆ _xt

double Herwig::MEPP2WHPowheg::_xt

private

Radiation variables.

The \(\tilde{x}\) variable

Definition at line 356 of file MEPP2WHPowheg.h.

◆ CF_

const double Herwig::MEPP2WHPowheg::CF_

private

The \(C_F\) colour factor.

Definition at line 281 of file MEPP2WHPowheg.h.

◆ TR_

const double Herwig::MEPP2WHPowheg::TR_

private

The \(T_R\) colour factor.

Definition at line 276 of file MEPP2WHPowheg.h.

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

MEPP2WHPowheg.h

Public Member Functions

Protected Member Functions

Standard Interfaced functions.

Functions used by the persistent I/O system.

Additional Inherited Members

Detailed Description

Member Function Documentation

◆ clone()

◆ doinit()

◆ dSigHatDR()

◆ fullclone()

◆ generateKinematics()

◆ Init()

◆ nDim()

◆ operator=()

◆ persistentInput()

◆ persistentOutput()

◆ scale()

Member Data Documentation

◆ _a

◆ _alphaS2Pi

◆ _contrib

◆ _fixed_alphaS

◆ _fixedScale

◆ _gluon

◆ _hadron_A

◆ _hadron_B

◆ _mll2

◆ _mu2

◆ _nlo_alphaS_opt

◆ _oldq

◆ _oldqbar

◆ _p

◆ _parton_a

◆ _parton_b

◆ _scaleFact

◆ _scaleopt

◆ _v

◆ _xb_a

◆ _xb_b

◆ _xt

◆ CF_

◆ TR_