Herwig
7.2.1
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The MEPP2Higgs 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 <MEPP2Higgs.h>
Public Member Functions | |
MEPP2Higgs () | |
The default constructor. | |
virtual CrossSection | dSigHatDR () const |
Return the matrix element for the kinematical configuation previously provided by the last call to setKinematics(). More... | |
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. | |
Member functions for the generation of hard QCD radiation | |
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. More... | |
virtual RealEmissionProcessPtr | generateHardest (RealEmissionProcessPtr, ShowerInteraction) |
Apply the POWHEG style correction. | |
Virtual functions required by the MEBase class. | |
virtual unsigned int | orderInAlphaS () const |
Return the order in in which this matrix element is given. | |
virtual unsigned int | orderInAlphaEW () const |
Return the order in 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. More... | |
virtual bool | generateKinematics (const double *r) |
Generate internal degrees of freedom given nDim() uniform random numbers in the interval . More... | |
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. | |
virtual void | getDiagrams () const |
Add all possible diagrams with the add() function. | |
virtual Selector< DiagramIndex > | diagrams (const DiagramVector &dv) const |
Get diagram selector. More... | |
virtual Selector< const ColourLines * > | colourGeometries (tcDiagPtr diag) const |
Return a Selector with possible colour geometries for the selected diagram weighted by their relative probabilities. More... | |
virtual void | constructVertex (tSubProPtr) |
Construct the vertex of spin correlations. | |
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 Herwig::HwMEBase | |
HwMEBase () | |
Default constructor. | |
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::MEBase | |
virtual double | alphaS () const |
virtual double | alphaEM () const |
void | setKinematics (tPPair in, const PVector &out) |
virtual void | constructVertex (tSubProPtr sub, const ColourLines *cl) |
virtual bool | wantCMS () const |
virtual bool | headCuts () const |
virtual bool | ignoreCuts () const |
virtual bool | apply () const |
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 bool | noMirror () const |
const DiagramVector & | diagrams () const |
virtual const ColourLines & | selectColourGeometry (tcDiagPtr diag) 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) |
virtual double | alphaS () const |
virtual double | alphaEM () const |
void | setKinematics (tPPair in, const PVector &out) |
virtual void | constructVertex (tSubProPtr sub, const ColourLines *cl) |
virtual bool | wantCMS () const |
virtual bool | headCuts () const |
virtual bool | ignoreCuts () const |
virtual bool | apply () const |
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 bool | noMirror () const |
const DiagramVector & | diagrams () const |
virtual const ColourLines & | selectColourGeometry (tcDiagPtr diag) 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 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 |
void | persistentOutput (PersistentOStream &os) const |
void | persistentInput (PersistentIStream &is, int version) |
Public Member Functions inherited from ThePEG::InterfacedBase | |
string | fullName () const |
string | name () const |
string | path () const |
string | comment () const |
void | setup (istream &is) |
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 |
void | persistentOutput (PersistentOStream &os) const |
void | persistentInput (PersistentIStream &is, int version) |
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 |
void | persistentOutput (PersistentOStream &os) const |
void | persistentInput (PersistentIStream &is, int version) |
Public Member Functions inherited from ThePEG::Base | |
void | debug () 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 StandardXComb & | lastXComb () const |
const StandardXComb & | lastXComb () const |
tXCPtr | lastXCombPtr () const |
tXCPtr | lastXCombPtr () const |
const StandardXComb & | lastHeadXComb () const |
const StandardXComb & | 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 |
Energy2 | lastScale () const |
double | lastAlphaS () const |
double | lastAlphaS () const |
double | lastAlphaEM () const |
double | lastAlphaEM () const |
const vector< Lorentz5Momentum > & | meMomenta () const |
const vector< Lorentz5Momentum > & | meMomenta () const |
double | lastME2 () const |
double | lastME2 () const |
double | lastPreweight () const |
double | lastPreweight () const |
double | jacobian () const |
double | jacobian () const |
CrossSection | lastMECrossSection () const |
CrossSection | lastMECrossSection () const |
double | lastMEPDFWeight () const |
double | lastMEPDFWeight () const |
double | lastMECouplings () const |
double | lastMECouplings () const |
tSubProPtr | subProcess () const |
tSubProPtr | subProcess () const |
const cPDVector & | mePartonData () const |
const cPDVector & | mePartonData () const |
Static Public Member Functions | |
static void | Init () |
The standard Init function used to initialize the interfaces. More... | |
Static Public Member Functions inherited from Herwig::HwMEBase | |
static void | Init () |
The standard Init function used to initialize the interfaces. More... | |
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 () |
Protected Member Functions | |
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. More... | |
bool | getEvent (vector< Lorentz5Momentum > &pnew, int &emissiontype) |
generates the hardest emission (yj,p) More... | |
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 and transverse momentum . More... | |
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 | doinit () |
Initialize this object after the setup phase before saving an EventGenerator to disk. More... | |
virtual void | dofinish () |
Finalize this object. More... | |
Energy4 | loME () const |
Members to calculate the real emission matrix elements. More... | |
Energy2 | ggME (Energy2 s, Energy2 t, Energy2 u) |
The matrix element for . | |
Energy2 | qgME (Energy2 s, Energy2 t, Energy2 u) |
The matrix element for . | |
Energy2 | qbargME (Energy2 s, Energy2 t, Energy2 u) |
The matrix element for . | |
Complex | B (Energy2 s, Energy2 mf2) const |
Members to calculate the functions for the loop diagrams. More... | |
complex< InvEnergy2 > | C (Energy2 s, Energy2 mf2) const |
The function of NBP339 (1990) 38-66. More... | |
complex< InvEnergy4 > | D (Energy2 s, Energy2 t, Energy2 u, Energy2 mf2) const |
The function of NBP339 (1990) 38-66. More... | |
Complex | dIntegral (Energy2 a, Energy2 b, double y0) const |
The integral from NBP339 (1990) 38-66. More... | |
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 matrix element of NBP339 (1990) 38-66. More... | |
complex< Energy > | me2 (Energy2 s, Energy2 t, Energy2 u, Energy2 mf2) const |
The matrix element of NBP339 (1990) 38-66. More... | |
Complex | F (double x) const |
The function for the leading-order result. | |
Protected Member Functions inherited from Herwig::HwMEBase | |
void | massOption (vector< unsigned int > iopt) |
Set the treatment of the outgoing masses. More... | |
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). | |
Energy2 | tHat () const |
Return the of the last set phase space point. | |
Energy2 | uHat () const |
Return the 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 of the last set phase space point. | |
void | uHat (Energy2 e2) |
Set the of the last set phase space point. | |
void | phi (double phi) |
Set the azimuth angle of the last set phase space point. | |
void | rescalingOption (unsigned int iopt) |
Rescaled momenta for the helicity ME. More... | |
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. | |
Protected Member Functions inherited from ThePEG::MEBase | |
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 |
virtual void | doinitrun () |
virtual void | doinitrun () |
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 | |
InterfacedBase (string newName) | |
InterfacedBase (const InterfacedBase &i) | |
virtual void | readSetup (istream &is) |
virtual void | doupdate () |
virtual IVector | getReferences () |
virtual void | rebind (const TranslationMap &) |
virtual void | readSetup (istream &is) |
virtual void | doupdate () |
virtual IVector | getReferences () |
virtual void | rebind (const TranslationMap &) |
Protected Member Functions inherited from ThePEG::Pointer::ReferenceCounted | |
ReferenceCounted (const ReferenceCounted &) | |
ReferenceCounted & | operator= (const 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) |
Private Member Functions | |
MEPP2Higgs & | operator= (const MEPP2Higgs &)=delete |
The assignment operator is private and must never be called. More... | |
double | ggME (vector< VectorWaveFunction > g1, vector< VectorWaveFunction > g2, ScalarWaveFunction &, bool calc) const |
Members to return the matrix elements for the different subprocesses. More... | |
double | qqME (vector< SpinorWaveFunction > &fin, vector< SpinorBarWaveFunction > &ain, ScalarWaveFunction &, bool calc) const |
Calculates the matrix element for the process q,qbar->h. More... | |
Private Attributes | |
unsigned int | scaleopt_ |
Selects a dynamic (sHat) or fixed factorization scale. | |
Energy | mu_F_ |
The value associated to the fixed factorization scale option. | |
unsigned int | shapeOption_ |
Defines the Higgs resonance shape. | |
unsigned int | processOption_ |
The processes to be included (GG->H and/or qq->H) | |
int | minFlavour_ |
Minimum flavour of incoming quarks. | |
int | maxFlavour_ |
Maximum flavour of incoming quarks. | |
ProductionMatrixElement | me_ |
Matrix element for spin correlations. | |
AbstractVVSVertexPtr | HGGVertex_ |
Pointer to the H-> 2 gluon vertex (used in gg->H) | |
AbstractFFSVertexPtr | HFFVertex_ |
Pointer to the fermion-fermion Higgs vertex (used in qq->H) | |
GenericMassGeneratorPtr | hmass_ |
The mass generator for the Higgs. | |
Energy | mh_ |
On-shell mass for the higgs. | |
Energy | wh_ |
On-shell width for the higgs. | |
ShowerAlphaPtr | alpha_ |
Pointer to the object calculating the strong coupling. | |
Energy2 | mh2_ |
Mass squared of Higgs. | |
double | channelwgtA_ |
Relative weight of the to the channel. | |
double | channelwgtB_ |
Relative weight for the to the channel. | |
vector< double > | channelWeights_ |
Weights for the channels as a vector. | |
double | ggPow_ |
Power for the importance sampling of the component. | |
double | qgPow_ |
Power for the importance sampling of the and components. | |
double | enhance_ |
The enhancement factor for initial-state radiation. | |
unsigned int | nover_ |
Number of weights greater than 1. | |
unsigned int | ntry_ |
Number of attempts. | |
unsigned int | ngen_ |
Number which suceed. | |
double | maxwgt_ |
Maximum weight. | |
Energy | minpT_ |
The transverse momentum of the jet. | |
bool | spinCorrelations_ |
Whether of not to construct the vertex for spin correlations. | |
unsigned int | minLoop_ |
Stuff for the ME correction. More... | |
unsigned int | maxLoop_ |
Maximum flavour of quarks to include in the loops. | |
unsigned int | massOption_ |
Option for treatment of the fermion loops. | |
unsigned int | mu_R_opt_ |
Option for dynamic scale choice in alpha_S (0=mT,>0=pT) | |
unsigned int | mu_F_opt_ |
Option for dynamic scale choice in PDFs (0=mT,>0=pT) | |
Complex | bi_ [5] |
Storage of the loop functions. More... | |
complex< InvEnergy2 > | ci_ [8] |
C functions. | |
complex< InvEnergy4 > | di_ [4] |
D functions. | |
double | power_ |
Constants for the sampling. More... | |
double | pregg_ |
The prefactor, for the channel. | |
double | preqg_ |
The prefactor, for the channel. | |
double | pregqbar_ |
The prefactor, for the channel. | |
vector< double > | prefactor_ |
The prefactors as a vector for easy use. | |
vector< tcBeamPtr > | beams_ |
Properties of the incoming particles. More... | |
vector< tcPDPtr > | partons_ |
Pointers to the ParticleDataObjects for the partons. | |
double | yh_ |
Properties of the boson and jets. More... | |
Energy | mass_ |
The mass of the Higgs boson. | |
double | yj_ |
the rapidity of the jet | |
Energy | pt_ |
The transverse momentum of the jet. | |
tcPDPtr | out_ |
The outgoing parton. | |
Static Private Attributes | |
static const complex< Energy2 > | epsi_ |
Small complex number to regularize some integrals. | |
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< StandardXComb >::pointer | XCPtr |
typedef ThePEG::Ptr< StandardXComb >::const_pointer | cXCPtr |
typedef ThePEG::Ptr< StandardXComb >::transient_pointer | tXCPtr |
typedef ThePEG::Ptr< StandardXComb >::transient_const_pointer | tcXCPtr |
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 |
The MEPP2Higgs 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).
Definition at line 38 of file MEPP2Higgs.h.
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protected |
Return the momenta and type of hard matrix element correction.
gluons | The original incoming particles. |
beams | The BeamParticleData objects |
higgs | The original outgoing higgs |
iemit | Whether the first (0) or second (1) particle emitted the radiation |
itype | The type of radiated particle (0 is gluon, 1 is quark and 2 is antiquark) |
pnew | The momenta of the new particles |
xnew | The new values of the momentuym fractions |
out | The ParticleData object for the outgoing parton |
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protected |
Members to calculate the functions for the loop diagrams.
The function of NBP339 (1990) 38-66
s | The scale |
mf2 | The fermion mass squared. |
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protected |
The function of NBP339 (1990) 38-66.
s | The scale |
mf2 | The fermion mass squared. |
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inlineprotectedvirtual |
Make a simple clone of this object.
Implements ThePEG::InterfacedBase.
Reimplemented in Herwig::MEPP2HiggsPowheg.
Definition at line 227 of file MEPP2Higgs.h.
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virtual |
Return a Selector with possible colour geometries for the selected diagram weighted by their relative probabilities.
diag | the diagram chosen. |
Implements ThePEG::MEBase.
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protected |
The function of NBP339 (1990) 38-66.
s | The invariant |
t | The invariant |
u | The invariant |
mf2 | The fermion mass squared |
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virtual |
Get diagram selector.
With the information previously supplied with the setKinematics method, a derived class may optionally override this method to weight the given diagrams with their (although certainly not physical) relative probabilities.
dv | the diagrams to be weighted. |
Reimplemented from ThePEG::MEBase.
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protected |
The integral from NBP339 (1990) 38-66.
a | The parameter . |
b | The parameter . |
y0 | The parameter . |
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protectedvirtual |
Finalize this object.
Called in the run phase just after a run has ended. Used eg. to write out statistics.
Reimplemented from ThePEG::InterfacedBase.
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protectedvirtual |
Initialize this object after the setup phase before saving an EventGenerator to disk.
InitException | if object could not be initialized properly. |
Reimplemented from ThePEG::MEBase.
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virtual |
Return the matrix element for the kinematical configuation previously provided by the last call to setKinematics().
Uses me().
Reimplemented from Herwig::HwMEBase.
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inlineprotectedvirtual |
Make a clone of this object, possibly modifying the cloned object to make it sane.
Reimplemented from ThePEG::InterfacedBase.
Reimplemented in Herwig::MEPP2HiggsPowheg.
Definition at line 233 of file MEPP2Higgs.h.
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virtual |
Generate internal degrees of freedom given nDim() uniform random numbers in the interval .
To help the phase space generator, the dSigHatDR should be a smooth function of these numbers, although this is not strictly necessary.
r | a pointer to the first of nDim() consecutive random numbers. |
Reimplemented from Herwig::HwMEBase.
Reimplemented in Herwig::MEPP2HiggsPowheg.
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protected |
generates the hardest emission (yj,p)
pnew | The momenta of the new particles |
emissiontype | The type of emission, as for getResult |
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protected |
Returns the matrix element for a given type of process, rapidity of the jet and transverse momentum .
emis_type | the type of emission, (0 is , 1 is and 2 is ) |
pt | The transverse momentum of the jet |
yj | The rapidity of the jet |
outParton | the outgoing parton |
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private |
Members to return the matrix elements for the different subprocesses.
Calculates the matrix element for the process g,g->h (via quark loops)
g1 | a vector of wave functions of the first incoming gluon |
g2 | a vector of wave functions of the second incoming gluon |
calc | Whether or not to calculate the matrix element for spin correlations |
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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.
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protected |
Members to calculate the real emission matrix elements.
The leading-order matrix element for
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protected |
The matrix element of NBP339 (1990) 38-66.
s | The invariant |
t | The invariant |
u | The invariant |
mf2 | The fermion mass squared. |
i | Which of the stored values to use for . |
j | Which of the stored values to use for . |
k | Which of the stored values to use for . |
i1 | Which of the stored values to use for . |
j1 | Which of the stored values to use for . |
k1 | Which of the stored values to use for . |
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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.
Implements ThePEG::MEBase.
Reimplemented in Herwig::MEPP2HiggsPowheg.
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protected |
The matrix element of NBP339 (1990) 38-66.
s | The invariant |
t | The invariant |
u | The invariant |
mf2 | The fermion mass squared. |
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privatedelete |
The assignment operator is private and must never be called.
In fact, it should not even be implemented.
void Herwig::MEPP2Higgs::persistentInput | ( | PersistentIStream & | is, |
int | version | ||
) |
Function used to read in object persistently.
is | the persistent input stream read from. |
version | the version number of the object when written. |
void Herwig::MEPP2Higgs::persistentOutput | ( | PersistentOStream & | os | ) | const |
Function used to write out object persistently.
os | the persistent output stream written to. |
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private |
Calculates the matrix element for the process q,qbar->h.
fin | a vector of quark spinors |
ain | a vector of anti-quark spinors |
calc | Whether or not to calculate the matrix element for spin correlations |
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virtual |
Apply the soft matrix element correction.
parent | The initial particle in the current branching |
progenitor | The progenitor particle of the jet |
fs | Whether the emission is initial or final-state |
highestpT | The highest pT so far in the shower |
ids | ids of the particles produced in the branching |
z | The momentum fraction of the branching |
scale | the evolution scale of the branching |
pT | The transverse momentum of the branching |
Reimplemented from Herwig::HwMEBase.
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private |
Properties of the incoming particles.
Pointers to the BeamParticleData objects
Definition at line 664 of file MEPP2Higgs.h.
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mutableprivate |
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private |
Stuff for the ME correction.
Parameters for the evaluation of the loops for the matrix elements Minimum flavour of quarks to include in the loops
Definition at line 508 of file MEPP2Higgs.h.
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private |
Constants for the sampling.
The distribution is assumed to have the form The power, , for the sampling
Definition at line 629 of file MEPP2Higgs.h.
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private |
Properties of the boson and jets.
The rapidity of the Higgs boson
Definition at line 679 of file MEPP2Higgs.h.