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Herwig  7.1.4

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:

Public Member Functions

 MEPP2HiggsPowheg ()
 The default constructor.
 
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. More...
 
Energy2 tk (double xt, double y) const
 Invariant required for the evaluation of next-to-leading order quantities (Frixione et al. More...
 
Energy2 uk (double xt, double y) const
 Invariant required for the evaluation of next-to-leading order quantities (Frixione et al. More...
 
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.
 
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. More...
 
virtual bool generateKinematics (const double *r)
 Generate internal degrees of freedom given nDim() uniform random numbers in the interval $ ]0,1[ $. 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.
 
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::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(). 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.
 
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 (ShowerProgenitorPtr initial, ShowerParticlePtr parent, Branching br)
 Apply the soft matrix element correction. More...
 
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< DiagramIndexdiagrams (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.
 
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 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 DiagramVectordiagrams () const
 
virtual const ColourLinesselectColourGeometry (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 DVectormeInfo () 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 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 DiagramVectordiagrams () const
 
virtual const ColourLinesselectColourGeometry (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 DVectormeInfo () 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())
 
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 StandardXComblastXComb () const
 
const StandardXComblastXComb () const
 
tXCPtr lastXCombPtr () const
 
tXCPtr lastXCombPtr () const
 
const StandardXComblastHeadXComb () const
 
const StandardXComblastHeadXComb () const
 
tXCPtr lastHeadXCombPtr () const
 
tXCPtr lastHeadXCombPtr () const
 
const EventHandlerlastEventHandler () const
 
const EventHandlerlastEventHandler () const
 
tPExtrPtr lastExtractor () const
 
tPExtrPtr lastExtractor () const
 
PDFT pdf (tcPPtr parton) const
 
PDFT pdf (tcPPtr parton) const
 
const CutslastCuts () const
 
const CutslastCuts () const
 
tCutsPtr lastCutsPtr () const
 
tCutsPtr lastCutsPtr () const
 
const PPairlastParticles () const
 
const PPairlastParticles () const
 
Energy2 lastS () const
 
Energy2 lastS () const
 
const PPairlastPartons () const
 
const PPairlastPartons () 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 cPDVectormePartonData () const
 
const cPDVectormePartonData () 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::MEPP2Higgs
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

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...
 
- Protected Member Functions inherited from Herwig::MEPP2Higgs
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 $y_j$ and transverse momentum $p_T$. More...
 
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 $gg\to H g$.
 
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. More...
 
complex< InvEnergy2 > C (Energy2 s, Energy2 mf2) const
 The $C(s)$ function of NBP339 (1990) 38-66. More...
 
complex< InvEnergy4 > D (Energy2 s, Energy2 t, Energy2 u, Energy2 mf2) const
 The $C(s)$ function of NBP339 (1990) 38-66. More...
 
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. 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 $M_{+++}$ matrix element of NBP339 (1990) 38-66. More...
 
complex< Energy > me2 (Energy2 s, Energy2 t, Energy2 u, Energy2 mf2) const
 The $M_{++-}$ matrix element of NBP339 (1990) 38-66. More...
 
Complex F (double x) const
 The $F(x)$ 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 $\hat{t}$ 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 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 &)
 
ReferenceCountedoperator= (const ReferenceCounted &)
 
 ReferenceCounted (const ReferenceCounted &)
 
ReferenceCountedoperator= (const ReferenceCounted &)
 
- Protected Member Functions inherited from ThePEG::Named
const Namedoperator= (const Named &other)
 
const string & name (const string &newName)
 

Private Member Functions

MEPP2HiggsPowhegoperator= (const MEPP2HiggsPowheg &)
 The assignment operator is private and must never be called. More...
 

Private Attributes

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.
 
const double CF_
 Parameters for the NLO weight. More...
 
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. More...
 
double y_
 The $y$ angular variable.
 

Static Private Attributes

static ClassDescription< MEPP2HiggsPowheginitMEPP2HiggsPowheg
 The static object used to initialize the description of this class. More...
 

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< ReweightPtrReweightVector
 
- 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
 

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
ra 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.

◆ operator=()

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

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
isthe persistent input stream read from.
versionthe version number of the object when written.

◆ persistentOutput()

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

Function used to write out object persistently.

Parameters
osthe 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.

◆ 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.

◆ 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.

Member Data Documentation

◆ CF_

const double Herwig::MEPP2HiggsPowheg::CF_
private

Parameters for the NLO weight.

The colour factors

Definition at line 294 of file MEPP2HiggsPowheg.h.

◆ initMEPP2HiggsPowheg

ClassDescription<MEPP2HiggsPowheg> Herwig::MEPP2HiggsPowheg::initMEPP2HiggsPowheg
staticprivate

The static object used to initialize the description of this class.

Indicates that this is a concrete class with persistent data.

Definition at line 277 of file MEPP2HiggsPowheg.h.

◆ xt_

double Herwig::MEPP2HiggsPowheg::xt_
private

Radiation variables.

The $\tilde{x}$ variable

Definition at line 329 of file MEPP2HiggsPowheg.h.


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