The MEPP2HiggsPowheg class implements the matrix element for the process pp->Higgs with different Higgs shape prescriptions (see details in hep-ph/9505211) and the NLL corrected Higgs width (see details in the FORTRAN HERWIG manual). More...

#include <MEPP2HiggsPowheg.h>

Inheritance diagram for Herwig::MEPP2HiggsPowheg:

[legend]

Public Member Functions
	MEPP2HiggsPowheg ()
	The default constructor.

Virtual functions required by the MEBase class.
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 bool	generateKinematics (const double *r)
	Generate internal degrees of freedom given nDim() uniform random numbers in the interval \( ]0,1[ \).

virtual Energy2	scale () const
	Return the scale associated with the last set phase space point.

virtual int	nDim () const
	The number of internal degrees of freedom used in the matrix element.

Public Member Functions inherited from Herwig::MEPP2Higgs
	MEPP2Higgs ()
	The default constructor.

virtual CrossSection	dSigHatDR () const
	Return the matrix element for the kinematical configuation previously provided by the last call to setKinematics().

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 POWHEGType	hasPOWHEGCorrection ()
	Has a POWHEG style correction.

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

virtual void	initializeMECorrection (RealEmissionProcessPtr, double &, double &)
	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 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 void	getDiagrams () const
	Add all possible diagrams with the add() function.

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::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

Clone Methods.
const double	CF_
	Parameters for the NLO weight.

const double	CA_

const double	TR_

const int	nlf_
	Number of light flavours (in the beta function beta0_)

const double	beta0_
	(Proportional to) The beta function

unsigned int	contrib_
	Whether to generate the positive, negative or leading order contribution.

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 nlo_alphaS_opt_=1.

double	xt_
	Radiation variables.

double	y_
	The \(y\) angular variable.

double	lo_lumi_
	Values of the PDF's before radiation.

double	lo_ggME_
	The value of the leading order gg->H matrix element.

Energy2	p2_
	The invariant mass of the lo final state.

Energy2	s2_
	The invariant mass of the lo final state.

double	xbp_
	The momentum fraction of the plus parton in the Born process.

double	xbm_
	The momentum fraction of the minus parton in the Born process.

double	etabarp_
	The sqrt(1-xbp_)

double	etabarm_
	The sqrt(1-xbm_)

tcPDPtr	a_lo_
	The ParticleData object for the plus lo parton.

tcPDPtr	b_lo_
	The ParticleData object for the minus lo parton.

Ptr< BeamParticleData >::transient_const_pointer	hadron_A_
	The BeamParticleData object for the plus direction hadron.

Ptr< BeamParticleData >::transient_const_pointer	hadron_B_
	The BeamParticleData object for the minus direction hadron.

double	alphaS_
	The value of \(\alpha_S\) used for the calculation.

unsigned int	scaleopt_
	Selects a dynamic (sHat) or fixed factorization scale.

Energy	mu_F_
	The factorization scale.

Energy	mu_UV_
	The renormalization scale.

double	scaleFact_
	Prefactor if variable scale used.

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.

MEPP2HiggsPowheg &	operator= (const MEPP2HiggsPowheg &)=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.

void	get_born_variables () const
	Function to set the born variables.

double	NLOweight () const
	Calculate the correction weight with which leading-order configurations are re-weighted.

Energy2	s (double xt, double y) const
	Invariant required for the evaluation of next-to-leading order quantities (Frixione et al.

Energy2	tk (double xt, double y) const
	Invariant required for the evaluation of next-to-leading order quantities (Frixione et al.

Energy2	uk (double xt, double y) const
	Invariant required for the evaluation of next-to-leading order quantities (Frixione et al.

double	xbar (double y) const
	Calculate the minimum of \(x\).

double	etabar (double y) const
	Calculate auxiliary function of \(\bar{x}(y)\), \(\bar{\eta}(y)\).

double	x (double xt, double y) const
	Calculate the variable \(x=p^{2}/s\) from the integration variables.

double	xp (double x, double y) const
	Calculate the momentum fraction of the plus parton.

double	xm (double x, double y) const
	Calculate the momentum fraction of the minus parton.

double	Lhat_ab (tcPDPtr a, tcPDPtr b, double x, double y) const
	Calculate the ratio of the NLO luminosity to the LO luminosity function for the \(q\bar{q}\) initiated channel.

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

double	Ctilde_Ltilde_gg_on_x (tcPDPtr a, tcPDPtr b, double xt, double y) const
	Function for calculation of the \(gg\) initiated real contribution.

double	Ctilde_Ltilde_qg_on_x (tcPDPtr a, tcPDPtr b, double xt, double y) const
	Function for calculation of the \(qg\) initiated real contribution.

double	Ctilde_Ltilde_gq_on_x (tcPDPtr a, tcPDPtr b, double xt, double y) const
	Function for calculation of the \(gq\) initiated real contribution.

double	M_V_regular () const
	The regular part of the virtual correction matrix element(s)

Energy2	t_u_M_R_qqbar (double xt, double y) const
	The matrix element q + qbar -> n + g times tk*uk.

Energy2	t_u_M_R_qbarq (double xt, double y) const
	The matrix element qbar + q -> n + g times tk*uk.

Energy2	t_u_M_R_gg (double xt, double y) const
	The matrix element g + g -> n + g times tk*uk.

Energy2	t_u_M_R_qg (double xt, double y) const
	The matrix element q + g -> n + q times tk*uk.

Energy2	t_u_M_R_gq (double xt, double y) const
	The matrix element g + q -> n + q times tk*uk.

double	Rtilde_Ltilde_qqbar_on_x (tcPDPtr a, tcPDPtr b, double xt, double y) const
	Function for calculation of the \(q\bar{q}\) initiated real contribution.

double	Rtilde_Ltilde_qbarq_on_x (tcPDPtr a, tcPDPtr b, double xt, double y) const
	Function for calculation of the \(\bar{q}q\) initiated real contribution.

double	Rtilde_Ltilde_gg_on_x (tcPDPtr a, tcPDPtr b, double xt, double y) const
	Function for calculation of the \(qq\) initiated real contribution.

double	Rtilde_Ltilde_qg_on_x (tcPDPtr a, tcPDPtr b, double xt, double y) const
	Function for calculation of the \(qg\) initiated real contribution.

double	Rtilde_Ltilde_gq_on_x (tcPDPtr a, tcPDPtr b, double xt, double y) const
	Function for calculation of the \(gq\) initiated real contribution.

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

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::MEPP2Higgs
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

Protected Member Functions inherited from Herwig::MEPP2Higgs
virtual void	doinit ()
	Initialize this object after the setup phase before saving an EventGenerator to disk.

virtual void	dofinish ()
	Finalize this object.

Energy4	loME () const
	Members to calculate the real emission matrix elements.

Energy2	ggME (Energy2 s, Energy2 t, Energy2 u)
	The matrix element for \(gg\to H g\).

Energy2	qgME (Energy2 s, Energy2 t, Energy2 u)
	The matrix element for \(qg\to H q\).

Energy2	qbargME (Energy2 s, Energy2 t, Energy2 u)
	The matrix element for \(qbarg\to H qbar\).

Complex	B (Energy2 s, Energy2 mf2) const
	Members to calculate the functions for the loop diagrams.

complex< InvEnergy2 >	C (Energy2 s, Energy2 mf2) const
	The \(C(s)\) function of NBP339 (1990) 38-66.

complex< InvEnergy4 >	D (Energy2 s, Energy2 t, Energy2 u, Energy2 mf2) const
	The \(C(s)\) function of NBP339 (1990) 38-66.

Complex	dIntegral (Energy2 a, Energy2 b, double y0) const
	The integral \(\int\frac{dy}{y-y_0}\log(a-i\epsilon-b y(1-y))\) from NBP339 (1990) 38-66.

complex< Energy >	me1 (Energy2 s, Energy2 t, Energy2 u, Energy2 mf2, unsigned int i, unsigned int j, unsigned int k, unsigned int i1, unsigned int j1, unsigned int k1) const
	The \(M_{+++}\) matrix element of NBP339 (1990) 38-66.

complex< Energy >	me2 (Energy2 s, Energy2 t, Energy2 u, Energy2 mf2) const
	The \(M_{++-}\) matrix element of NBP339 (1990) 38-66.

Complex	F (double x) const
	The \(F(x)\) function for the leading-order result.

tPDPtr	quarkFlavour (tcPDFPtr pdf, Energy2 scale, double x, tcBeamPtr beam, double &pdfweight, bool anti)
	Method to extract the PDF weight for quark/antiquark initiated processes and select the quark flavour.

bool	applyHard (ParticleVector gluons, vector< tcBeamPtr > beams, PPtr higgs, unsigned int &iemit, unsigned int &itype, vector< Lorentz5Momentum > &pnew, pair< double, double > &xnew, tPDPtr &out)
	Return the momenta and type of hard matrix element correction.

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

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

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)

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 MEPP2HiggsPowheg class implements the matrix element for the process pp->Higgs with different Higgs shape prescriptions (see details in hep-ph/9505211) and the NLL corrected Higgs width (see details in the FORTRAN HERWIG manual).

See also: The interfaces defined for MEPP2HiggsPowheg.

Definition at line 30 of file MEPP2HiggsPowheg.h.

Member Function Documentation

◆ clone()

virtual IBPtr Herwig::MEPP2HiggsPowheg::clone ( ) const

inlineprotectedvirtual

Make a simple clone of this object.

Returns: a pointer to the new object.

Reimplemented from Herwig::MEPP2Higgs.

Definition at line 262 of file MEPP2HiggsPowheg.h.

◆ fullclone()

virtual IBPtr Herwig::MEPP2HiggsPowheg::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::MEPP2Higgs.

Definition at line 268 of file MEPP2HiggsPowheg.h.

◆ generateKinematics()

virtual bool Herwig::MEPP2HiggsPowheg::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.

Parameters

r	a pointer to the first of nDim() consecutive random numbers.

Returns: true if the generation succeeded, otherwise false.

Reimplemented from Herwig::MEPP2Higgs.

◆ Init()

static void Herwig::MEPP2HiggsPowheg::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.

◆ me2()

virtual double Herwig::MEPP2HiggsPowheg::me2 ( ) const

virtual

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.

Returns: the matrix element scaled with sHat() to give a dimensionless number.

Reimplemented from Herwig::MEPP2Higgs.

◆ nDim()

virtual int Herwig::MEPP2HiggsPowheg::nDim ( ) const

virtual

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

Reimplemented from Herwig::MEPP2Higgs.

◆ operator=()

MEPP2HiggsPowheg & Herwig::MEPP2HiggsPowheg::operator= ( const MEPP2HiggsPowheg & )

privatedelete

The assignment operator is private and must never be called.

In fact, it should not even be implemented.

◆ persistentInput()

void Herwig::MEPP2HiggsPowheg::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::MEPP2HiggsPowheg::persistentOutput ( PersistentOStream & os ) const

Function used to write out object persistently.

Parameters

os	the persistent output stream written to.

◆ s()

Energy2 Herwig::MEPP2HiggsPowheg::s	(	double	xt,
		double	y
	)		const

inline

Invariant required for the evaluation of next-to-leading order quantities (Frixione et al.

NPB.383 WZ production at colliders).

Definition at line 115 of file MEPP2HiggsPowheg.h.

References p2_, and x().

◆ scale()

virtual Energy2 Herwig::MEPP2HiggsPowheg::scale ( ) const

virtual

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

Reimplemented from Herwig::MEPP2Higgs.

◆ tk()

Energy2 Herwig::MEPP2HiggsPowheg::tk	(	double	xt,
		double	y
	)		const

inline

Invariant required for the evaluation of next-to-leading order quantities (Frixione et al.

NPB.383 WZ production at colliders).

Definition at line 123 of file MEPP2HiggsPowheg.h.

References p2_, and x().

◆ uk()

Energy2 Herwig::MEPP2HiggsPowheg::uk	(	double	xt,
		double	y
	)		const

inline

Invariant required for the evaluation of next-to-leading order quantities (Frixione et al.

NPB.383 WZ production at colliders).

Definition at line 132 of file MEPP2HiggsPowheg.h.

References p2_, and x().

◆ x()

double Herwig::MEPP2HiggsPowheg::x	(	double	xt,
		double	y
	)		const

inline

Calculate the variable \(x=p^{2}/s\) from the integration variables.

Definition at line 150 of file MEPP2HiggsPowheg.h.

References xbar().

Referenced by s(), tk(), and uk().

Member Data Documentation

◆ a_lo_

tcPDPtr Herwig::MEPP2HiggsPowheg::a_lo_

mutableprivate

The ParticleData object for the plus lo parton.

Definition at line 374 of file MEPP2HiggsPowheg.h.

Referenced by s(), tk(), and uk().

◆ s2_

Energy2 Herwig::MEPP2HiggsPowheg::s2_

mutableprivate

The invariant mass of the lo final state.

Definition at line 349 of file MEPP2HiggsPowheg.h.

◆ scaleFact_

double Herwig::MEPP2HiggsPowheg::scaleFact_

private

Prefactor if variable scale used.

Definition at line 414 of file MEPP2HiggsPowheg.h.

◆ scaleopt_

unsigned int Herwig::MEPP2HiggsPowheg::scaleopt_

private

Selects a dynamic (sHat) or fixed factorization scale.

Definition at line 399 of file MEPP2HiggsPowheg.h.

◆ TR_

const double Herwig::MEPP2HiggsPowheg::TR_

private

Definition at line 288 of file MEPP2HiggsPowheg.h.

◆ xbm_

double Herwig::MEPP2HiggsPowheg::xbm_

mutableprivate

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

Definition at line 359 of file MEPP2HiggsPowheg.h.

◆ xbp_

double Herwig::MEPP2HiggsPowheg::xbp_

mutableprivate

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

Definition at line 354 of file MEPP2HiggsPowheg.h.

◆ xt_

double Herwig::MEPP2HiggsPowheg::xt_

private

Radiation variables.

The \(\tilde{x}\) variable

Definition at line 323 of file MEPP2HiggsPowheg.h.

◆ y_

double Herwig::MEPP2HiggsPowheg::y_

private

The \(y\) angular variable.

Definition at line 328 of file MEPP2HiggsPowheg.h.

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

MEPP2HiggsPowheg.h

Public Member Functions

Clone Methods.

Functions used by the persistent I/O system.

Additional Inherited Members

Detailed Description

Member Function Documentation

◆ clone()

◆ fullclone()

◆ generateKinematics()

◆ Init()

◆ me2()

◆ nDim()

◆ operator=()

◆ persistentInput()

◆ persistentOutput()

◆ s()

◆ scale()

◆ tk()

◆ uk()

◆ x()

Member Data Documentation

◆ a_lo_

◆ alphaS_

◆ b_lo_

◆ beta0_

◆ CA_

◆ CF_

◆ contrib_

◆ etabarm_

◆ etabarp_

◆ fixed_alphaS_

◆ hadron_A_

◆ hadron_B_

◆ lo_ggME_

◆ lo_lumi_

◆ mu_F_

◆ mu_UV_

◆ nlf_

◆ nlo_alphaS_opt_

◆ p2_

◆ s2_

◆ scaleFact_

◆ scaleopt_

◆ TR_

◆ xbm_

◆ xbp_

◆ xt_

◆ y_