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Herwig 7.3.0
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Herwig::QuarkoniumDecayer Class Reference
Decay classes

The QuarkoniumDecayer class is designed for the partonic decay of bottom and charmonium resonances. More...

#include <QuarkoniumDecayer.h>

Inheritance diagram for Herwig::QuarkoniumDecayer:
Inheritance graph
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Public Member Functions

 QuarkoniumDecayer ()
 Standard ctors and dtor.
 
virtual bool accept (tcPDPtr parent, const tPDVector &children) const
 Check if this decayer can perfom the decay for a particular mode.
 
virtual ParticleVector decay (const Particle &parent, const tPDVector &children) const
 Perform the decay of the particle to the specified decay products.
 
virtual void dataBaseOutput (ofstream &os, bool header) const
 Output the setup information for the particle database.
 
void persistentOutput (PersistentOStream &) const
 Standard Persistent stream methods.
 
void persistentInput (PersistentIStream &, int)
 Standard Persistent stream methods.
 
- Public Member Functions inherited from Herwig::PartonicDecayerBase
 PartonicDecayerBase ()
 The default constructor.
 
virtual ParticleVector decay (const DecayMode &dm, const Particle &p) const
 Perform a decay for a given DecayMode and a given Particle instance.
 
void persistentOutput (PersistentOStream &os) const
 Function used to write out object persistently.
 
void persistentInput (PersistentIStream &is, int version)
 Function used to read in object persistently.
 
- Public Member Functions inherited from Herwig::HwDecayerBase
 HwDecayerBase ()
 The default constructor.
 
virtual bool accept (const DecayMode &dm) const
 Check if this decayer can perfom the decay specified by the given decay mode.
 
virtual POWHEGType hasPOWHEGCorrection ()
 Has a POWHEG style correction.
 
virtual bool hasMECorrection ()
 Has an old fashioned ME correction.
 
virtual void initializeMECorrection (RealEmissionProcessPtr, double &, double &)
 Initialize the ME correction.
 
virtual RealEmissionProcessPtr applyHardMatrixElementCorrection (RealEmissionProcessPtr)
 Apply the hard matrix element correction to a given hard process or decay.
 
virtual bool softMatrixElementVeto (PPtr parent, PPtr progenitor, const bool &fs, const Energy &highestpT, const vector< tcPDPtr > &ids, const double &z, const Energy &scale, const Energy &pT)
 Apply the soft matrix element correction.
 
virtual RealEmissionProcessPtr generateHardest (RealEmissionProcessPtr)
 Apply the POWHEG style correction.
 
void persistentOutput (PersistentOStream &os) const
 Function used to write out object persistently.
 
void persistentInput (PersistentIStream &is, int version)
 Function used to read in object persistently.
 
bool initialize () const
 Access to the initialize variable.
 
bool databaseOutput () const
 Access the database output variable.
 
- Public Member Functions inherited from ThePEG::Decayer
void persistentOutput (PersistentOStream &os) const
 
void persistentInput (PersistentIStream &is, int version)
 
virtual bool accept (const DecayMode &dm) const=0
 
virtual bool needsFullStep () const
 
virtual ParticleVector decay (const DecayMode &dm, const Particle &p) const=0
 
virtual ParticleVector decay (const DecayMode &dm, const Particle &p, Step &step) const
 
virtual double brat (const DecayMode &dm, const ParticleData &pd, double oldbrat) const
 
virtual double brat (const DecayMode &dm, const Particle &p, double oldbrat) const
 
virtual ParticleVector getChildren (const DecayMode &dm, const Particle &parent) const
 
virtual void finalBoost (const Particle &parent, const ParticleVector &children) const
 
virtual void setScales (const Particle &parent, const ParticleVector &children) const
 
Ptr< Amplitude >::pointer amplitude () const
 
- Public Member Functions inherited from ThePEG::HandlerBaseT< UseRandom >
double rnd () const
 
double rnd (double xu) const
 
double rnd (double xl, double xu) const
 
bool rndbool () const
 
bool rndbool (double p) const
 
bool rndbool (double p1, double p2) const
 
int rndsign (double p1, double p2, double p3) const
 
int rnd2 (double p0, double p1) const
 
int rnd3 (double p0, double p1, double p2) const
 
int rnd4 (double p0, double p1, double p2, double p3) const
 
long irnd (long xu=2) const
 
long irnd (long xl, long xu) const
 
const StandardModelBase & SM () const
 
tSMPtr standardModel () const
 
- Public Member Functions inherited from ThePEG::Interfaced
virtual bool defaultInit ()
 
PPtr getParticle (PID) const
 
PDPtr getParticleData (PID) const
 
bool used () const
 
void useMe () const
 
tEGPtr generator () const
 
void persistentOutput (PersistentOStream &os) const
 
void persistentInput (PersistentIStream &is, int version)
 
PPtr getParticle (PID) const
 
PDPtr getParticleData (PID) const
 
bool used () const
 
void useMe () const
 
tEGPtr generator () const
 
- Public Member Functions inherited from ThePEG::InterfacedBase
string fullName () const
 
string name () const
 
string path () const
 
string comment () const
 
void setup (istream &is)
 
void update ()
 
void init ()
 
virtual bool preInitialize () const
 
void initrun ()
 
void finish ()
 
void touch ()
 
void reset ()
 
void clear ()
 
InitState state () const
 
bool locked () const
 
bool touched () const
 
virtual IBPtr fullclone () const
 
void persistentOutput (PersistentOStream &os) const
 
void persistentInput (PersistentIStream &is, int version)
 
virtual void debugme () const
 
void update ()
 
void init ()
 
virtual bool preInitialize () const
 
void initrun ()
 
void finish ()
 
void touch ()
 
void reset ()
 
void clear ()
 
InitState state () const
 
bool locked () const
 
bool touched () const
 
virtual IBPtr fullclone () const
 
- Public Member Functions inherited from ThePEG::Base
void debug () const
 
virtual void debugme () const
 
- Public Member Functions inherited from ThePEG::Pointer::ReferenceCounted
CounterType referenceCount () const
 
- Public Member Functions inherited from ThePEG::Named
 Named (const string &newName=string())
 
 Named (const Named &)=default
 
const string & name () const
 
bool operator== (const Named &other) const
 
bool operator< (const Named &other) const
 

Static Public Member Functions

static void Init ()
 Standard Init function used to initialize the interface.
 
- Static Public Member Functions inherited from Herwig::PartonicDecayerBase
static void Init ()
 The standard Init function used to initialize the interfaces.
 
- Static Public Member Functions inherited from Herwig::HwDecayerBase
static void Init ()
 The standard Init function used to initialize the interfaces.
 
- Static Public Member Functions inherited from ThePEG::Decayer
static void Init ()
 
static ParticleVector DecayParticle (tPPtr parent, Step &step, long maxtry=1000)
 
- 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

virtual IBPtr clone () const
 Standard clone methods.
 
virtual IBPtr fullclone () const
 Standard clone methods.
 
- Protected Member Functions inherited from Herwig::PartonicDecayerBase
virtual void doinit ()
 Initialize this object after the setup phase before saving an EventGenerator to disk.
 
bool duplicateMode (const Particle &parent, const vector< tPPtr > &hadrons) const
 Check hadrons produced in a partonic hadron decay do not reproduce an inclusive mode.
 
PVector shower (const Particle &parent, ParticleVector &partons) const
 Perform the parton shower.
 
bool timeLikeShower (tShowerParticlePtr particle, Branching fb, bool first, PVector &output) const
 
- Protected Member Functions inherited from Herwig::HwDecayerBase
virtual void dofinish ()
 Finalize this object.
 
void fixRho (RhoDMatrix &) const
 Set rho to be diagonal if no correlations.
 
- Protected Member Functions inherited from ThePEG::Interfaced
void reporeg (IBPtr object, string name) const
 
bool setDefaultReference (PtrT &ptr, string classname, string objectname)
 
 Interfaced (const string &newName)
 
 Interfaced (const Interfaced &i)
 
void setGenerator (tEGPtr generator)
 
- Protected Member Functions inherited from ThePEG::InterfacedBase
virtual void readSetup (istream &is)
 
virtual void doupdate ()
 
virtual void doinit ()
 
virtual void doinitrun ()
 
virtual void dofinish ()
 
virtual IVector getReferences ()
 
virtual void rebind (const TranslationMap &)
 
virtual IBPtr clone () const=0
 
 InterfacedBase (string newName)
 
 InterfacedBase (const InterfacedBase &i)
 
virtual void readSetup (istream &is)
 
virtual void doupdate ()
 
virtual void doinit ()
 
virtual void doinitrun ()
 
virtual void dofinish ()
 
virtual IVector getReferences ()
 
virtual void rebind (const TranslationMap &)
 
- Protected Member Functions inherited from ThePEG::Pointer::ReferenceCounted
 ReferenceCounted (const ReferenceCounted &)
 
ReferenceCounted & operator= (const ReferenceCounted &)
 
- Protected Member Functions inherited from ThePEG::Named
const Named & operator= (const Named &other)
 
const string & name (const string &newName)
 

Private Member Functions

const QuarkoniumDecayer & operator= (const QuarkoniumDecayer &)=delete
 Private and non-existent assignment operator.
 

Private Attributes

int MECode
 The code for the type of matrix element being used.
 

Additional Inherited Members

- Public Types inherited from Herwig::HwDecayerBase
enum  POWHEGType { No , ISR , FSR , Both }
 Virtual members to be overridden by inheriting classes which implement hard corrections. More...
 
- Public Types inherited from ThePEG::InterfacedBase
enum  InitState
 
- Public Types inherited from ThePEG::Pointer::ReferenceCounted
typedef unsigned int CounterType
 
- 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)
 

Detailed Description

The QuarkoniumDecayer class is designed for the partonic decay of bottom and charmonium resonances.

In general it is used for decays of the type:

  • \(q,\bar{q}\) decay to a quark-antiquark pair generally using phase space, i.e. MECode=0.
  • \(g,g\) decay to two gluons normally using phase space, i.e. MECode=0.
  • \(g,g,g\) decay to three gluons, this will normally use the Ore-Powell matrix element, i.e. MECode=130.
  • \(g,g,\gamma\) decay to two gluons and a photon, this will normally use the Ore-Powell matrix element, i.e. MECode=130.

This class supports two values of the MECode variable which can be set using the interface

  • MECode=0 flat-phase space
  • MECode=130 The Ore-Powell onium matrix element.

This is designed to be the same as the FORTRAN HERWIG routine.

See also
HeavyDecayer
Hw64Decayer
Decayer

Definition at line 50 of file QuarkoniumDecayer.h.

Member Function Documentation

◆ accept()

virtual bool Herwig::QuarkoniumDecayer::accept ( tcPDPtr  parent,
const tPDVector &  children 
) const
virtual

Check if this decayer can perfom the decay for a particular mode.

Parameters
parentThe decaying particle
childrenThe decay products
Returns
true If this decayer can handle the given mode, otherwise false.

Implements Herwig::PartonicDecayerBase.

◆ clone()

virtual IBPtr Herwig::QuarkoniumDecayer::clone ( ) const
protectedvirtual

Standard clone methods.

Standard clone methods

Implements ThePEG::InterfacedBase.

◆ dataBaseOutput()

virtual void Herwig::QuarkoniumDecayer::dataBaseOutput ( ofstream &  os,
bool  header 
) const
virtual

Output the setup information for the particle database.

Parameters
osThe stream to output the information to
headerWhether or not to output the information for MySQL

Reimplemented from Herwig::PartonicDecayerBase.

◆ decay()

virtual ParticleVector Herwig::QuarkoniumDecayer::decay ( const Particle &  parent,
const tPDVector &  children 
) const
virtual

Perform the decay of the particle to the specified decay products.

Parameters
parentThe decaying particle
childrenThe decay products
Returns
a ParticleVector containing the decay products.

Implements Herwig::PartonicDecayerBase.

◆ fullclone()

virtual IBPtr Herwig::QuarkoniumDecayer::fullclone ( ) const
protectedvirtual

Standard clone methods.

Reimplemented from ThePEG::InterfacedBase.

Member Data Documentation

◆ MECode

int Herwig::QuarkoniumDecayer::MECode
private

The code for the type of matrix element being used.

Definition at line 128 of file QuarkoniumDecayer.h.

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