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Herwig 7.3.0
Herwig::OneKaonTwoPionCurrent Class Reference

The OneKaonTwoPionCurrent class implements the model of M. More...

#include <OneKaonTwoPionCurrent.h>

Inheritance diagram for Herwig::OneKaonTwoPionCurrent:

Public Member Functions

 OneKaonTwoPionCurrent ()
 The default constructor.
 
Methods for the construction of the phase space integrator.
virtual bool createMode (int icharge, tcPDPtr resonance, FlavourInfo flavour, unsigned int imode, PhaseSpaceModePtr mode, unsigned int iloc, int ires, PhaseSpaceChannel phase, Energy upp)
 Complete the construction of the decay mode for integration.classes inheriting from this one.
 
virtual vector< LorentzPolarizationVectorEcurrent (tcPDPtr resonance, FlavourInfo flavour, const int imode, const int ichan, Energy &scale, const tPDVector &outgoing, const vector< Lorentz5Momentum > &momenta, DecayIntegrator::MEOption meopt) const
 Hadronic current.
 
virtual bool accept (vector< int > id)
 Accept the decay.
 
virtual unsigned int decayMode (vector< int > id)
 Return the decay mode number for a given set of particles in the current.
 
virtual tPDVector particles (int icharge, unsigned int imode, int iq, int ia)
 The particles produced by the current.
 
virtual void dataBaseOutput (ofstream &os, bool header, bool create) const
 Output the setup information for the particle database.
 
- Public Member Functions inherited from Herwig::WeakCurrent
 WeakCurrent ()
 Default constructor.
 
unsigned int numberOfModes () const
 Return the number of modes handled by this current.
 
virtual void constructSpinInfo (ParticleVector decay) const
 Construct the SpinInfo for the decay products.
 
void decayModeInfo (unsigned int imode, int &iq, int &ia) const
 Information on a decay mode.
 
void persistentOutput (PersistentOStream &os) const
 Function used to write out object persistently.
 
void persistentInput (PersistentIStream &is, int version)
 Function used to read in object persistently.
 
- Public Member Functions inherited from ThePEG::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
 

Clone Methods.

vector< double > _rho1wgts
 Parameters for the \(\rho\) in the axial-vector terms.
 
vector< Energy > _rho1mass
 Masses.
 
vector< Energy > _rho1width
 Widths.
 
vector< double > _kstar1wgts
 Parameters for the \(K^*\) in the axial-vector terms.
 
vector< Energy > _kstar1mass
 Masses.
 
vector< Energy > _kstar1width
 Widths.
 
vector< double > _kstar2wgts
 Parameters for the \(K^*\) in the vector terms.
 
vector< Energy > _kstar2mass
 Masses.
 
vector< Energy > _kstar2width
 Widths.
 
vector< Energy > _k1mass
 Parameters for the three meson resonances.
 
vector< Energy > _k1width
 The widths of the \(K_1\) resonances.
 
vector< double > _k1wgta
 The weights for the different \(K_1\) resonances for \(K_1\to K^*\pi\).
 
vector< double > _k1wgtb
 The weights for the different \(K_1\) resonaces for \(K_1\to\rho K\).
 
Energy _fpi
 The pion decay constant, \(f_\pi\).
 
Energy _mpi
 The pion mass.
 
Energy _mK
 The kaon mass.
 
virtual IBPtr clone () const
 Make a simple clone of this object.
 
virtual IBPtr fullclone () const
 Make a clone of this object, possibly modifying the cloned object to make it sane.
 
virtual void doinit ()
 Initialize this object after the setup phase before saving and EventGenerator to disk.
 
OneKaonTwoPionCurrentoperator= (const OneKaonTwoPionCurrent &)=delete
 The assignment operator is private and must never be called.
 
Complex Trho1 (Energy2 q2, int ires) const
 The \(\rho\) lineshape for the axial-vector terms.
 
Complex TKstar1 (Energy2 q2, int ires) const
 The \(K^*\) lineshape for the axial-vector terms.
 
Complex TKstar2 (Energy2 q2, int ires) const
 The \(K^*\) lineshape for the vector terms.
 
Complex TK1 (Energy2 q2, unsigned int iopt, int ires) const
 The \(K_1\) line shape.
 

Functions used by the persistent I/O system.

void persistentOutput (PersistentOStream &os) const
 Function used to write out object persistently.
 
void persistentInput (PersistentIStream &is, int version)
 Function used to read in object persistently.
 
static void Init ()
 The standard Init function used to initialize the interfaces.
 

Additional Inherited Members

- Public Types inherited from ThePEG::InterfacedBase
enum  InitState
 
- Public Types inherited from ThePEG::Pointer::ReferenceCounted
typedef unsigned int CounterType
 
- Static Public Member Functions inherited from Herwig::WeakCurrent
static void Init ()
 Standard Init function used to initialize the interfaces.
 
- Static Public Member Functions inherited from ThePEG::Interfaced
static void Init ()
 
- Static Public Member Functions inherited from ThePEG::InterfacedBase
static void Init ()
 
- Static Public Member Functions inherited from ThePEG::Base
static void Init ()
 
- Public Attributes inherited from ThePEG::InterfacedBase
 initializing
 
 uninitialized
 
 initialized
 
 runready
 
- Public Attributes inherited from ThePEG::Pointer::ReferenceCounted
const unsigned long uniqueId
 
- Protected Member Functions inherited from Herwig::WeakCurrent
void addDecayMode (int iq, int ia)
 Add a decay mode to the list.
 
void setInitialModes (unsigned int nmodes)
 Set initial number of modes.
 
- 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 &)
 
ReferenceCountedoperator= (const ReferenceCounted &)
 
- Protected Member Functions inherited from ThePEG::Named
const Namedoperator= (const Named &other)
 
const string & name (const string &newName)
 
- Static Protected Member Functions inherited from ThePEG::Interfaced
static void registerRepository (IBPtr)
 
static void registerRepository (IBPtr, string newName)
 

Detailed Description

The OneKaonTwoPionCurrent class implements the model of M.

Finkemeier and E.~Mirkes, Z. Phys. C 69 (1996) 243 [arXiv:hep-ph/9503474], for the weak current for three mesons where at least one of the mesons is a kaon.

This is the base class for the three meson decays of the weak current. It is designed so that the currents for the following modes can be implemented in classes inheriting from this

  • \( \pi^- \pi^- \pi^+ \), (imode=0)
  • \( \pi^0 \pi^0 \pi^- \), (imode=1)
  • \( K^- \pi^- K^+ \), (imode=2)
  • \( K^0 \pi^- \bar{K}^0\), (imode=3)
  • \( K^- \pi^0 K^0 \), (imode=4)
  • \( \pi^0 \pi^0 K^- \), (imode=5)
  • \( K^- \pi^- \pi^+ \), (imode=6)
  • \( \pi^- \bar{K}^0 \pi^0 \), (imode=7)
  • \( \pi^- \pi^0 \eta \), (imode=8)

obviously there are other modes with three pseudoscalar mesons for the decay of the weak current but this model original came from \(\tau\) decay where these are the only modes. However one case which is important is the inclusion of the mixing in the neutral kaon sector for which we include the additional currents

  • \( K^0_S \pi^- K^0_S\), (imode=9)
  • \( K^0_L \pi^- K^0_L\), (imode=10)
  • \( K^0_S \pi^- K^0_L\), (imode=11)

    In this case the current is given by

    \[ J^\mu = \left(g^{\mu\nu}-\frac{q^\mu q^\nu}{q^2}\right) \left[F_1(p_2-p_3)^\mu +F_2(p_3-p_1)^\mu+F_3(p_1-p_2)^\mu\right] +q^\mu F_4 +F_5\epsilon^{\mu\alpha\beta\gamma}p_1^\alpha p_2^\beta p_3^\gamma \]

    where

  • \(p_{1,2,3}\) are the momenta of the mesons in the order given above.
  • \(F_1,F_2,F_3,F_4,F_5\) are the form factors which must be calculated in the calculateFormFactors member which should be implemented in classes inheriting from this.
See also
WeakCurrent.
Author
Peter Richardson
See also
The interfaces defined for OneKaonTwoPionCurrent.

Definition at line 71 of file OneKaonTwoPionCurrent.h.

Member Function Documentation

◆ accept()

virtual bool Herwig::OneKaonTwoPionCurrent::accept ( vector< int >  id)
virtual

Accept the decay.

Checks the mesons against the list.

Parameters
idThe id's of the particles in the current.
Returns
Can this current have the external particles specified.

Implements Herwig::WeakCurrent.

◆ clone()

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

Make a simple clone of this object.

Returns
a pointer to the new object.

Implements ThePEG::InterfacedBase.

◆ createMode()

virtual bool Herwig::OneKaonTwoPionCurrent::createMode ( int  icharge,
tcPDPtr  resonance,
FlavourInfo  flavour,
unsigned int  imode,
PhaseSpaceModePtr  mode,
unsigned int  iloc,
int  ires,
PhaseSpaceChannel  phase,
Energy  upp 
)
virtual

Complete the construction of the decay mode for integration.classes inheriting from this one.

This method is purely virtual and must be implemented in the classes inheriting from WeakCurrent.

Parameters
ichargeThe total charge of the outgoing particles in the current.
resonanceIf specified only include terms with this particle
flavourInformation on the required flavours of the quarks
imodeThe mode in the current being asked for.
modeThe phase space mode for the integration
ilocThe location of the of the first particle from the current in the list of outgoing particles.
iresThe location of the first intermediate for the current.
phaseThe prototype phase space channel for the integration.
uppThe maximum possible mass the particles in the current are allowed to have.
Returns
Whether the current was sucessfully constructed.

Implements Herwig::WeakCurrent.

◆ current()

virtual vector< LorentzPolarizationVectorE > Herwig::OneKaonTwoPionCurrent::current ( tcPDPtr  resonance,
FlavourInfo  flavour,
const int  imode,
const int  ichan,
Energy &  scale,
const tPDVector outgoing,
const vector< Lorentz5Momentum > &  momenta,
DecayIntegrator::MEOption  meopt 
) const
virtual

Hadronic current.

This method is purely virtual and must be implemented in all classes inheriting from this one.

Parameters
resonanceIf specified only include terms with this particle
flavourInformation on the required flavours of the quarks
imodeThe mode
ichanThe phase-space channel the current is needed for.
scaleThe invariant mass of the particles in the current.
outgoingThe particles produced in the decay
momentaThe momenta of the particles produced in the decay
meoptOption for the calculation of the matrix element
Returns
The current.

Implements Herwig::WeakCurrent.

◆ dataBaseOutput()

virtual void Herwig::OneKaonTwoPionCurrent::dataBaseOutput ( ofstream &  os,
bool  header,
bool  create 
) 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
createWhether or not to add a statement creating the object

Reimplemented from Herwig::WeakCurrent.

◆ decayMode()

virtual unsigned int Herwig::OneKaonTwoPionCurrent::decayMode ( vector< int >  id)
virtual

Return the decay mode number for a given set of particles in the current.

Checks the mesons against the list.

Parameters
idThe id's of the particles in the current.
Returns
The number of the mode

Implements Herwig::WeakCurrent.

◆ doinit()

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

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

Exceptions
InitExceptionif object could not be initialized properly.

Reimplemented from ThePEG::InterfacedBase.

◆ fullclone()

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

Make a clone of this object, possibly modifying the cloned object to make it sane.

Returns
a pointer to the new object.

Reimplemented from ThePEG::InterfacedBase.

◆ Init()

static void Herwig::OneKaonTwoPionCurrent::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.

◆ operator=()

OneKaonTwoPionCurrent & Herwig::OneKaonTwoPionCurrent::operator= ( const OneKaonTwoPionCurrent )
privatedelete

The assignment operator is private and must never be called.

In fact, it should not even be implemented.

◆ particles()

virtual tPDVector Herwig::OneKaonTwoPionCurrent::particles ( int  icharge,
unsigned int  imode,
int  iq,
int  ia 
)
virtual

The particles produced by the current.

This returns the mesons for the mode.

Parameters
ichargeThe total charge of the particles in the current.
imodeThe mode for which the particles are being requested
iqThe PDG code for the quark
iaThe PDG code for the antiquark
Returns
The external particles for the current.

Implements Herwig::WeakCurrent.

◆ persistentInput()

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

Function used to write out object persistently.

Parameters
osthe persistent output stream written to.

◆ TK1()

Complex Herwig::OneKaonTwoPionCurrent::TK1 ( Energy2  q2,
unsigned int  iopt,
int  ires 
) const
private

The \(K_1\) line shape.

Parameters
q2The scale \(q^2\) for the Breit-Wigner
ioptWhether this is \(K^*\pi\) or \(\rho K\).
iresthe resonance

◆ TKstar1()

Complex Herwig::OneKaonTwoPionCurrent::TKstar1 ( Energy2  q2,
int  ires 
) const
inlineprivate

The \(K^*\) lineshape for the axial-vector terms.

Parameters
q2The scale \(q^2\) for the lineshape
iresWhich \(K^*\) multiplet

Definition at line 249 of file OneKaonTwoPionCurrent.h.

References _kstar1mass, _kstar1wgts, _kstar1width, _mK, and _mpi.

◆ TKstar2()

Complex Herwig::OneKaonTwoPionCurrent::TKstar2 ( Energy2  q2,
int  ires 
) const
inlineprivate

The \(K^*\) lineshape for the vector terms.

Parameters
q2The scale \(q^2\) for the lineshape
iresWhich \(K^*\) multiplet

Definition at line 269 of file OneKaonTwoPionCurrent.h.

References _kstar2mass, _kstar2wgts, _kstar2width, _mK, and _mpi.

◆ Trho1()

Complex Herwig::OneKaonTwoPionCurrent::Trho1 ( Energy2  q2,
int  ires 
) const
inlineprivate

The \(\rho\) lineshape for the axial-vector terms.

Parameters
q2The scale \(q^2\) for the lineshape
iresWhich \(\rho\) multiplet

Definition at line 229 of file OneKaonTwoPionCurrent.h.

References _mpi, _rho1mass, _rho1wgts, and _rho1width.

Member Data Documentation

◆ _fpi

Energy Herwig::OneKaonTwoPionCurrent::_fpi
private

The pion decay constant, \(f_\pi\).

Definition at line 383 of file OneKaonTwoPionCurrent.h.

◆ _k1mass

vector<Energy> Herwig::OneKaonTwoPionCurrent::_k1mass
private

Parameters for the three meson resonances.

The masses of the \(aK1\) resonances.

Definition at line 362 of file OneKaonTwoPionCurrent.h.

◆ _k1wgta

vector<double> Herwig::OneKaonTwoPionCurrent::_k1wgta
private

The weights for the different \(K_1\) resonances for \(K_1\to K^*\pi\).

Definition at line 372 of file OneKaonTwoPionCurrent.h.

◆ _k1wgtb

vector<double> Herwig::OneKaonTwoPionCurrent::_k1wgtb
private

The weights for the different \(K_1\) resonaces for \(K_1\to\rho K\).

Definition at line 377 of file OneKaonTwoPionCurrent.h.

◆ _k1width

vector<Energy> Herwig::OneKaonTwoPionCurrent::_k1width
private

The widths of the \(K_1\) resonances.

Definition at line 367 of file OneKaonTwoPionCurrent.h.

◆ _kstar1mass

vector<Energy> Herwig::OneKaonTwoPionCurrent::_kstar1mass
private

Masses.

Definition at line 326 of file OneKaonTwoPionCurrent.h.

Referenced by TKstar1().

◆ _kstar1wgts

vector<double> Herwig::OneKaonTwoPionCurrent::_kstar1wgts
private

Parameters for the \(K^*\) in the axial-vector terms.

Weight for the different resonances

Definition at line 321 of file OneKaonTwoPionCurrent.h.

Referenced by TKstar1().

◆ _kstar1width

vector<Energy> Herwig::OneKaonTwoPionCurrent::_kstar1width
private

Widths.

Definition at line 331 of file OneKaonTwoPionCurrent.h.

Referenced by TKstar1().

◆ _kstar2mass

vector<Energy> Herwig::OneKaonTwoPionCurrent::_kstar2mass
private

Masses.

Definition at line 346 of file OneKaonTwoPionCurrent.h.

Referenced by TKstar2().

◆ _kstar2wgts

vector<double> Herwig::OneKaonTwoPionCurrent::_kstar2wgts
private

Parameters for the \(K^*\) in the vector terms.

Weight for the different resonances

Definition at line 341 of file OneKaonTwoPionCurrent.h.

Referenced by TKstar2().

◆ _kstar2width

vector<Energy> Herwig::OneKaonTwoPionCurrent::_kstar2width
private

Widths.

Definition at line 351 of file OneKaonTwoPionCurrent.h.

Referenced by TKstar2().

◆ _mK

Energy Herwig::OneKaonTwoPionCurrent::_mK
private

The kaon mass.

Definition at line 393 of file OneKaonTwoPionCurrent.h.

Referenced by TKstar1(), and TKstar2().

◆ _mpi

Energy Herwig::OneKaonTwoPionCurrent::_mpi
private

The pion mass.

Definition at line 388 of file OneKaonTwoPionCurrent.h.

Referenced by TKstar1(), TKstar2(), and Trho1().

◆ _rho1mass

vector<Energy> Herwig::OneKaonTwoPionCurrent::_rho1mass
private

Masses.

Definition at line 306 of file OneKaonTwoPionCurrent.h.

Referenced by Trho1().

◆ _rho1wgts

vector<double> Herwig::OneKaonTwoPionCurrent::_rho1wgts
private

Parameters for the \(\rho\) in the axial-vector terms.

Weight for the different resonances

Definition at line 301 of file OneKaonTwoPionCurrent.h.

Referenced by Trho1().

◆ _rho1width

vector<Energy> Herwig::OneKaonTwoPionCurrent::_rho1width
private

Widths.

Definition at line 311 of file OneKaonTwoPionCurrent.h.

Referenced by Trho1().


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