herwig is hosted by Hepforge, IPPP Durham
Herwig  7.1.4

Here is the documentation of the MEPP2VVPowheg class. More...

#include <MEPP2VVPowheg.h>

Inheritance diagram for Herwig::MEPP2VVPowheg:

Public Member Functions

 MEPP2VVPowheg ()
 The default constructor.
 
virtual bool generateKinematics (const double *r)
 Generate internal degrees of freedom given nDim() uniform random numbers in the interval $ ]0,1[ $. More...
 
virtual int nDim () const
 The number of internal degrees of freedom used in the matrix element.
 
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 Energy2 scale () const
 Return the scale associated with the last set phase space point.
 
bool sanityCheck () const
 This member check the collinear limits of the real emission matrix elements are equal to the appropriate combinations of Born ME's multiplied by the splitting functions.
 
Complex CKM (int ix, int iy) const
 Return the CKM matrix elements.
 
void getKinematics (double xt, double y, double theta2)
 Function to set the born variables.
 
double NLOweight () const
 Calculate the correction weight with which leading-order configurations are re-weighted.
 
double Lhat_ab (tcPDPtr a, tcPDPtr b, realVVKinematics Kinematics) const
 Calculate the ratio of the NLO luminosity to the LO luminosity function for the $q\bar{q}$ initiated channel.
 
double Vtilde_universal (realVVKinematics S) const
 Calculate the universal soft-virtual contribution to the NLO weight.
 
double Ctilde_Ltilde_qq_on_x (tcPDPtr a, tcPDPtr b, realVVKinematics C) const
 Function for calculation of the $q\bar{q}$ initiated real contribution.
 
double Ctilde_Ltilde_gq_on_x (tcPDPtr a, tcPDPtr b, realVVKinematics C) const
 Function for calculation of the $gq$ initiated real contribution.
 
double Rtilde_Ltilde_qqb_on_x (tcPDPtr a, tcPDPtr b) const
 Function for calculation of the $q\bar{q}$ initiated real contribution.
 
double Rtilde_Ltilde_qg_on_x (tcPDPtr a, tcPDPtr b) const
 Function for calculation of the $qg$ initiated real contribution.
 
double Rtilde_Ltilde_gqb_on_x (tcPDPtr a, tcPDPtr b) const
 Function for calculation of the $gqb$ initiated real contribution.
 
double M_V_regular (realVVKinematics S) const
 The regular part of the virtual correction matrix element(s). More...
 
Energy2 t_u_M_R_qqb (realVVKinematics R) const
 The matrix element q + qb -> n + g times tk*uk.
 
Energy2 t_u_M_R_qg (realVVKinematics R) const
 The matrix element q + g -> n + q times tk*uk.
 
Energy2 t_u_M_R_gqb (realVVKinematics R) const
 The matrix element g + qb -> n + q times tk*uk.
 
Energy2 t_u_M_R_qqb_hel_amp (realVVKinematics R) const
 The matrix element q + qb -> n + g times (tk*uk)^2 - using helicity amplitudes.
 
Energy2 t_u_M_R_qg_hel_amp (realVVKinematics R) const
 The matrix element q + g -> n + q times (tk*uk)^2 - using helicity amplitudes.
 
Energy2 t_u_M_R_gqb_hel_amp (realVVKinematics R) const
 The matrix element g + qb -> n + qb times (tk*uk)^2 - using helicity amplitudes.
 
double lo_me () const
 The leading order matrix element - using helicity amplitudes.
 
double M_Born_WZ (bornVVKinematics B) const
 The Born matrix element as given in Equation 3.1 - 3.3 in NPB 383 (1992) *** modulo a factor 1/(2s) ***, which is a flux factor that those authors absorb in the matrix element.
 
double M_Born_ZZ (bornVVKinematics B) const
 The Born matrix element as given in Equation 2.18 - 2.19 in NPB 357 (1991) *** modulo a factor 1/(2s) ***, which is a flux factor that those authors absorb in the matrix element.
 
double M_V_regular_ZZ (realVVKinematics S) const
 M_V_regular_ZZ is the regular part of the one-loop ZZ matrix element exactly as defined in Eqs. More...
 
Energy2 t_u_M_R_qqb_ZZ (realVVKinematics R) const
 t_u_M_R_qqb_ZZ is the q + qb -> n + g times tk*uk real emission matrix element as defined in Eq. More...
 
double M_Born_WW (bornVVKinematics B) const
 The Born matrix element as given in Equation 3.2 - 3.8 in NPB 410 (1993) *** modulo a factor 1/(2s) ***, which is a flux factor that those authors absorb in the matrix element.
 
double M_V_regular_WW (realVVKinematics S) const
 M_V_regular_WW is the regular part of the one-loop WW matrix element exactly as defined in Eqs. More...
 
Energy2 t_u_M_R_qqb_WW (realVVKinematics R) const
 t_u_M_R_qqb_WW is the q + qb -> n + g times tk*uk real emission matrix element as defined in Eq. More...
 
Energy2 mu_F2 () const
 Return the factorion scale squared.
 
Energy2 mu_UV2 () const
 Return the renormalisation scale squared.
 
Member functions for the generation of hard QCD radiation
virtual POWHEGType hasPOWHEGCorrection ()
 Has a POWHEG style correction.
 
virtual RealEmissionProcessPtr generateHardest (RealEmissionProcessPtr, ShowerInteraction inter)
 Apply the POWHEG style correction.
 
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::MEPP2VV
 MEPP2VV ()
 The default constructor.
 
virtual unsigned int orderInAlphaS () const
 Return the order in $\alpha_S$ in which this matrix element is given.
 
virtual unsigned int orderInAlphaEW () const
 Return the order in $\alpha_{EW}$ in which this matrix element is given.
 
virtual int process () const
 Return the process being run (WW/ZZ/WZ).
 
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 double getCosTheta (double cthmin, double cthmax, const double r)
 Used internally by generateKinematics, after calculating the limits on cos(theta).
 
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.
 
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.
 
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...
 
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...
 
- 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::MEPP2VV
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 ()
 

Public Attributes

double M_V_regular_
 Member variable to store the regular part of the virtual correction matrix element(s). More...
 
Energy2 t_u_M_R_qqb_
 Member variable to store the matrix element q + qb -> n + g times tk*uk.
 
Energy2 t_u_M_R_qg_
 Member variable to store the matrix element q + g -> n + q times tk*uk.
 
Energy2 t_u_M_R_gqb_
 Member variable to store the matrix element g + qb -> n + q times tk*uk.
 
Energy2 t_u_M_R_qqb_hel_amp_
 Member variable to store the matrix element q + qb -> n + g times (tk*uk)^2 - using helicity amplitudes.
 
Energy2 t_u_M_R_qg_hel_amp_
 Member variable to store the matrix element q + g -> n + q times (tk*uk)^2 - using helicity amplitudes.
 
Energy2 t_u_M_R_gqb_hel_amp_
 Member variable to store the matrix element g + qb -> n + qb times (tk*uk)^2 - using helicity amplitudes.
 
double M_Born_
 Member variable to store the Born matrix element as given in Equation 3.1 - 3.3 in NPB 383 (1992) *** modulo a factor 1/(2s) ***, which is a flux factor that those authors absorb in the matrix element.
 
- Public Attributes inherited from ThePEG::InterfacedBase
 initializing
 
 uninitialized
 
 initialized
 
 runready
 
- Public Attributes inherited from ThePEG::Pointer::ReferenceCounted
const unsigned long uniqueId
 

Protected Member Functions

double getResult (int emis_type, realVVKinematics R, Energy pT)
 Returns the matrix element for a given type of process, rapidity of the jet $y_j$ and transverse momentum $p_T$. More...
 
bool getEvent (vector< Lorentz5Momentum > &pnew, unsigned int &emissiontype)
 generates the hardest emission (yj,p) More...
 
void setTheScales (Energy pT)
 sets the QCD, EW and PDF scales More...
 
Energy2 t_u_M_R_qqb_hel_amp (realVVKinematics R, bool getMatrix) const
 The matrix element q + qb -> n + g times tk*uk.
 
Energy2 t_u_M_R_qg_hel_amp (realVVKinematics R, bool getMatrix) const
 The matrix element q + g -> n + q times tk*uk.
 
Energy2 t_u_M_R_gqb_hel_amp (realVVKinematics R, bool getMatrix) const
 The matrix element g + qb -> n + q times tk*uk.
 
double lo_me (bool getMatrix) 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...
 
void recalculateVertex ()
 Recalculate hard vertex to include spin correlations for radiative events.
 
bool isotropicDecayer ()
 Member which selects a two body decay mode for each vector boson and distributes decay products isotropically.
 
Energy2 triangleFn (Energy2, Energy2, Energy2)
 The triangle function lambda(x,y,z)=sqrt(x^2+y^2+z^2-2*x*y-2*y*z-2*x*z)
 
Standard Interfaced functions.
virtual void doinit ()
 Initialize this object after the setup phase before saving an EventGenerator to disk. 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...
 
- Protected Member Functions inherited from Herwig::MEPP2VV
double WWME (vector< SpinorWaveFunction > &f1, vector< SpinorBarWaveFunction > &a1, vector< VectorWaveFunction > &v1, vector< VectorWaveFunction > &v2, bool me) const
 Matrix element for $f\bar{f}\to W^+W^-$. More...
 
double WZME (vector< SpinorWaveFunction > &f1, vector< SpinorBarWaveFunction > &a1, vector< VectorWaveFunction > &v1, vector< VectorWaveFunction > &v2, bool me) const
 Matrix element for $f\bar{f}\to W^\pm Z^0$. More...
 
double ZZME (vector< SpinorWaveFunction > &f1, vector< SpinorBarWaveFunction > &a1, vector< VectorWaveFunction > &v1, vector< VectorWaveFunction > &v2, bool me) const
 Matrix element for $f\bar{f}\to Z^0Z^0$. More...
 
- 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.
 
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 void dofinish ()
 
virtual IVector getReferences ()
 
virtual void rebind (const TranslationMap &)
 
virtual void readSetup (istream &is)
 
virtual void doupdate ()
 
virtual void dofinish ()
 
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

MEPP2VVPowhegoperator= (const MEPP2VVPowheg &)
 The assignment operator is private and must never be called. More...
 

Private Attributes

double alphaS_
 The value of $\alpha_S$ used for the calculation.
 
bool realMESpinCorrelations_
 If this boolean is true the n+1 body helicity amplitudes will be used to calculate a hard vertex based on those kinematics for spin correlations in the decays.
 
double lo_me_
 The colour & spin averaged n-body (leading order) matrix element squared.
 
realVVKinematics R_
 The resolved 2->3 real emission kinematics.
 
unsigned int channel_
 This specifies the emitting configuration: 1: q + qbar -> V1 + V2 + g 2: q + g -> V1 + V2 + q 3: g + qbar -> V1 + V2 + qbar.
 
int fermionNumberOfMother_
 Identifies the space-like mother of the branching as quark (+1) or antiquark (-1):
 
ShowerAlphaPtr showerAlphaS_
 Pointer to the object calculating the strong coupling.
 
Energy min_pT_
 The transverse momentum of the jet.
 
Energy2 QCDScale_
 Scale for alpha_S: pT^2 of the diboson system.
 
Energy2 PDFScale_
 Scale for real emission PDF:
 
Energy2 EWScale_
 Scale of electroweak vertices: mVV^2 the invariant mass of the diboson system.
 
Complex productionMatrix_ [3][3][3][3]
 A matrix to hold the home-grown production matrix element.
 
double tiny
 Parameters for the NLO weight. More...
 
tcBeamPtr hadron_A_
 The BeamParticleData object for the plus and minus direction hadrons.
 
tcBeamPtr hadron_B_
 
bornVVKinematics B_
 Born / virtual 2->2 kinematics.
 
realVVKinematics S_
 Soft limit of the 2->3 real emission kinematics.
 
realVVKinematics SCp_
 Soft-collinear limit of the 2->3 kinematics (emission in +z direction).
 
realVVKinematics SCm_
 The collinear limit of the 2->3 kinematics (emission in -z direction).
 
realVVKinematics Cp_
 The collinear limit of the 2->3 kinematics (emission in +z direction).
 
realVVKinematics Cm_
 The collinear limit of the 2->3 kinematics (emission in -z direction).
 
realVVKinematics H_
 The resolved 2->3 real emission kinematics:
 
tcPDPtr ab_
 The ParticleData object for the plus and minus lo partons.
 
tcPDPtr bb_
 
tcPDPtr quark_
 The ParticleData object for the quark and antiquark (which can be in a different order to ab_ and bb_).
 
tcPDPtr antiquark_
 
double lo_lumi_
 Values of the PDF's before radiation.
 
double lo_me2_
 The value of the leading order qqbar->VV matrix element.
 
double CF_
 The CF_ colour factor.
 
double TR_
 The TR_ colour factor.
 
double NC_
 The number of colours.
 
double gW_
 The weak coupling and the sin (squared) of the Weinberg angle.
 
double sin2ThetaW_
 
double guL_
 The up and down, left handed, quark-boson couplings.
 
double gdL_
 
double guR_
 The up and down, right handed, quark-boson couplings (for WW & ZZ)
 
double gdR_
 
double eZ_
 The TGC coupling.
 
double eZ2_
 The TGC coupling squared. More...
 
double Fij2_
 The CKM factor (Fij^2)
 
unsigned int contrib_
 Whether to generate the positive, negative or leading order contribution.
 
unsigned int channels_
 Whether to generate all channels contributions or just qqb or just qg+gqb contributions.
 
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.
 
unsigned int removebr_
 Flag to remove or multiply in MCFM branching fractions for testing.
 
unsigned int scaleopt_
 Selects a dynamic (sHat) or fixed factorization scale.
 
Energy mu_F_
 The factorization scale.
 
Energy mu_UV_
 The renormalization scale.
 
Energy2 k1r_perp2_lab_
 The pT of V1 in a radiative event in the lab frame (for scale setting only)
 
Energy2 k2r_perp2_lab_
 The pT of V2 in a radiative event in the lab frame (for scale setting only)
 
vector< vector< Complex > > ckm_
 The ckm matrix elements (unsquared, to allow interference)
 
bool helicityConservation_
 Option to impose helicity conservation on the real NLO ME's (greatly improves evaluation time).
 
ProductionMatrixElement qqb_hel_amps_
 The q + qb -> v1 + v2 + g helicity amplitudes.
 
ProductionMatrixElement qg_hel_amps_
 The q + g -> v1 + v2 + q helicity amplitudes.
 
ProductionMatrixElement gqb_hel_amps_
 The g + qb -> v1 + v2 + qb helicity amplitudes.
 
AbstractFFVVertexPtr FFPvertex_
 The vertices. More...
 
AbstractFFVVertexPtr FFWvertex_
 The W fermion-antifermion vertex.
 
AbstractFFVVertexPtr FFZvertex_
 The Z fermion-antifermionvertex.
 
AbstractVVVVertexPtr WWWvertex_
 The triple electroweak gauge boson vertex.
 
AbstractFFVVertexPtr FFGvertex_
 The quark-antiquark gluon vertex.
 
double power_
 Constants for the sampling. More...
 
double preqqbar_
 The prefactor, $c$ for the $q\bar{q}$ channel.
 
double preqg_
 The prefactor, $c$ for the $qg$ channel.
 
double pregqbar_
 The prefactor, $c$ for the $g\bar{q}$ channel.
 
double b0_
 The QCD beta function divided by 4pi, (11-2/3*nf)/4/pi, with nf = 5.
 
Energy LambdaQCD_
 The fundamental QCD scale in the one-loop alpha_{S} used for the crude (not the very crude) overestimate of the Sudakov exponent. More...
 
vector< double > prefactor_
 The prefactors as a vector for easy use.
 
PPtr qProgenitor_
 Properties of the incoming particles. More...
 
PPtr qbProgenitor_
 
PPtr showerQuark_
 Pointers to the Shower particle objects for the partons.
 
PPtr showerAntiquark_
 
tcBeamPtr qHadron_
 Pointers to the BeamParticleData objects.
 
tcBeamPtr qbHadron_
 
PPtr gluon_
 Properties of the boson and jets. More...
 
PPtr V1_
 
PPtr V2_
 
vector< PPtrchildren_
 
bool flipped_
 Flag indicating if the q & qbar are flipped or not i.e. More...
 
double Yk_
 the rapidity of the jet
 
Energy pT_
 The transverse momentum of the jet.
 

Static Private Attributes

static ClassDescription< MEPP2VVPowheginitMEPP2VVPowheg
 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
 
- 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

Here is the documentation of the MEPP2VVPowheg class.

See also
The interfaces defined for MEPP2VVPowheg.

Definition at line 25 of file MEPP2VVPowheg.h.

Member Function Documentation

◆ clone()

virtual IBPtr Herwig::MEPP2VVPowheg::clone ( ) const
inlineprotectedvirtual

Make a simple clone of this object.

Returns
a pointer to the new object.

Reimplemented from Herwig::MEPP2VV.

Definition at line 349 of file MEPP2VVPowheg.h.

◆ doinit()

virtual void Herwig::MEPP2VVPowheg::doinit ( )
protectedvirtual

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

Exceptions
InitExceptionif object could not be initialized properly.

Reimplemented from Herwig::MEPP2VV.

◆ fullclone()

virtual IBPtr Herwig::MEPP2VVPowheg::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::MEPP2VV.

Definition at line 355 of file MEPP2VVPowheg.h.

◆ generateKinematics()

virtual bool Herwig::MEPP2VVPowheg::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::HwMEBase.

◆ getEvent()

bool Herwig::MEPP2VVPowheg::getEvent ( vector< Lorentz5Momentum > &  pnew,
unsigned int &  emissiontype 
)
protected

generates the hardest emission (yj,p)

Parameters
pnewThe momenta of the new particles
emissiontypeThe type of emission, as for getResult
Returns
Whether not an emission was generated

◆ getResult()

double Herwig::MEPP2VVPowheg::getResult ( int  emis_type,
realVVKinematics  R,
Energy  pT 
)
protected

Returns the matrix element for a given type of process, rapidity of the jet $y_j$ and transverse momentum $p_T$.

Parameters
emis_typethe type of emission, (0 is $q\bar{q}\to Vg$, 1 is $qg\to Vq$ and 2 is $g\bar{q}\to V\bar{q}$)
pTThe transverse momentum of the jet
RThe object containing the kinematics

◆ Init()

static void Herwig::MEPP2VVPowheg::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.

◆ lo_me()

double Herwig::MEPP2VVPowheg::lo_me ( bool  getMatrix) const
protected

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.

◆ M_V_regular()

double Herwig::MEPP2VVPowheg::M_V_regular ( realVVKinematics  S) const

The regular part of the virtual correction matrix element(s).

For WZ production this is given by Equation B.2 in NPB 383 (1992) 3-44 *** modulo a factor 1/(2s) ***, which is a flux factor that those authors absorb in the matrix element.

◆ M_V_regular_WW()

double Herwig::MEPP2VVPowheg::M_V_regular_WW ( realVVKinematics  S) const

M_V_regular_WW is the regular part of the one-loop WW matrix element exactly as defined in Eqs.

C.1 - C.7 of of NPB 410(1993)280-324 *** modulo a factor 1/(2s) ***, which is a flux factor that those authors absorb in the matrix element.

◆ M_V_regular_ZZ()

double Herwig::MEPP2VVPowheg::M_V_regular_ZZ ( realVVKinematics  S) const

M_V_regular_ZZ is the regular part of the one-loop ZZ matrix element exactly as defined in Eqs.

B.1 & B.2 of NPB 357(1991)409-438 *** modulo a factor 1/(2s) ***, which is a flux factor that those authors absorb in the matrix element.

◆ me2()

virtual double Herwig::MEPP2VVPowheg::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::MEPP2VV.

◆ operator=()

MEPP2VVPowheg& Herwig::MEPP2VVPowheg::operator= ( const MEPP2VVPowheg )
private

The assignment operator is private and must never be called.

In fact, it should not even be implemented.

◆ persistentInput()

void Herwig::MEPP2VVPowheg::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::MEPP2VVPowheg::persistentOutput ( PersistentOStream os) const

Function used to write out object persistently.

Parameters
osthe persistent output stream written to.

◆ setTheScales()

void Herwig::MEPP2VVPowheg::setTheScales ( Energy  pT)
protected

sets the QCD, EW and PDF scales

Parameters
pTThe pT of the current step in the veto algorithm

◆ t_u_M_R_qqb_WW()

Energy2 Herwig::MEPP2VVPowheg::t_u_M_R_qqb_WW ( realVVKinematics  R) const

t_u_M_R_qqb_WW is the q + qb -> n + g times tk*uk real emission matrix element as defined in Eq.

D.1-D.5 of NPB 410(1993)280-324 *** modulo a factor 1/(2s) ***, which is a flux factor that those authors absorb in the matrix element.

◆ t_u_M_R_qqb_ZZ()

Energy2 Herwig::MEPP2VVPowheg::t_u_M_R_qqb_ZZ ( realVVKinematics  R) const

t_u_M_R_qqb_ZZ is the q + qb -> n + g times tk*uk real emission matrix element as defined in Eq.

C.1 of NPB 357(1991)409-438 *** modulo a factor 1/(2s) ***, which is a flux factor that those authors absorb in the matrix element.

Member Data Documentation

◆ eZ2_

double Herwig::MEPP2VVPowheg::eZ2_
mutableprivate

The TGC coupling squared.

This is useful for debugging purposes when one wants to turn of t-channel * TGC interference contributions but leave the pure TGC contributions intact. It is also needed in order to transform WZ matrix elements into WW ones.

Definition at line 488 of file MEPP2VVPowheg.h.

◆ FFPvertex_

AbstractFFVVertexPtr Herwig::MEPP2VVPowheg::FFPvertex_
private

The vertices.

The photon fermion-antifermion vertex

Definition at line 579 of file MEPP2VVPowheg.h.

◆ flipped_

bool Herwig::MEPP2VVPowheg::flipped_
private

Flag indicating if the q & qbar are flipped or not i.e.

this is true if q enters from the -z direction in the lab frame.

Definition at line 795 of file MEPP2VVPowheg.h.

◆ gluon_

PPtr Herwig::MEPP2VVPowheg::gluon_
private

Properties of the boson and jets.

Pointers to the Shower particle objects for the partons

Definition at line 786 of file MEPP2VVPowheg.h.

◆ initMEPP2VVPowheg

ClassDescription<MEPP2VVPowheg> Herwig::MEPP2VVPowheg::initMEPP2VVPowheg
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 364 of file MEPP2VVPowheg.h.

◆ LambdaQCD_

Energy Herwig::MEPP2VVPowheg::LambdaQCD_
private

The fundamental QCD scale in the one-loop alpha_{S} used for the crude (not the very crude) overestimate of the Sudakov exponent.

The default value is set so such that alphaS(MZ), neglecting all flavour threshold effects i.e. MZ*exp(-1/2/b0_/alphaS(MZ)).

Definition at line 748 of file MEPP2VVPowheg.h.

◆ M_V_regular_

double Herwig::MEPP2VVPowheg::M_V_regular_
mutable

Member variable to store the regular part of the virtual correction matrix element(s).

For WZ production this is given by Equation B.2 in NPB 383 (1992) 3-44 *** modulo a factor 1/(2s) ***, which is a flux factor that those authors absorb in the matrix element.

Definition at line 200 of file MEPP2VVPowheg.h.

◆ power_

double Herwig::MEPP2VVPowheg::power_
private

Constants for the sampling.

The distribution is assumed to have the form $\frac{c}{{\rm GeV}}\times\left(\frac{{\rm GeV}}{p_T}\right)^n$ The power, $n$, for the sampling

Definition at line 720 of file MEPP2VVPowheg.h.

◆ qProgenitor_

PPtr Herwig::MEPP2VVPowheg::qProgenitor_
private

Properties of the incoming particles.

Pointers to the ShowerProgenitor objects for the partons

Definition at line 763 of file MEPP2VVPowheg.h.

◆ tiny

double Herwig::MEPP2VVPowheg::tiny
private

Parameters for the NLO weight.

Parameter to determine when to use limiting value of real emission matrix elements, to avoid rounding error issues.

Definition at line 383 of file MEPP2VVPowheg.h.


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