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Herwig 7.3.0
Herwig::ThreePionCLEOCurrent Class Reference

The ThreePionCLEOCurrent class implements the decay of the weak current to three pions using the currents from CLEO Phys. More...

#include <ThreePionCLEOCurrent.h>

Inheritance diagram for Herwig::ThreePionCLEOCurrent:

Public Member Functions

 ThreePionCLEOCurrent ()
 Default constructor.
 
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.
 
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 void dataBaseOutput (ofstream &os, bool header, bool create) const
 Output the setup information for the particle database.
 
double threeBodyMatrixElement (const int iopt, const Energy2 q2, const Energy2 s3, const Energy2 s2, const Energy2 s1, const Energy m1, const Energy m2, const Energy m3) const
 the matrix element for the a1 decay to calculate the running width
 
- 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
 

Protected Member Functions

Clone Methods.
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.
 
- 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)
 

Friends

class ThreePionCLEOa1MatrixElement
 The matrix element for the running \(a_1\) width is a friend to keep some members private.
 

Standard Interfaced functions.

vector< Energy > _rhomass
 Masses of the \(\rho\) resonances.
 
vector< Energy > _rhowidth
 Widths of the \(\rho\) resonances.
 
Energy _f2mass
 Mass of the \(f_2\) resonance.
 
Energy _f2width
 Width of the \(f_2\) resonance.
 
Energy _f0mass
 Mass of the \(f_0(1370)\) resonance.
 
Energy _f0width
 Width of the \(f_0(1370)\) resonance.
 
Energy _sigmamass
 Mass of the \(\sigma\) resonance.
 
Energy _sigmawidth
 Width of the \(\sigma\) resonance.
 
Energy _mpi0
 Mass of the neutral pion.
 
Energy _mpic
 Mass of the charged pion.
 
Energy _a1mass
 The \(a_1\) mass.
 
Energy _a1width
 The \(a_1\) width.
 
Energy _mKstar
 Mass of the \(K^*\) resonace.
 
Energy _mK
 Mass of the \(K\) resonace.
 
double _gammk
 Coupling for the \(KK^*\) term in the running width.
 
Energy _fpi
 pion decay constant
 
InvEnergy _fact
 The prefactor.
 
vector< double > _rhomagP
 Magnitude of the \(p\)-wave couplings of the rho resonance, \(g^P_{\rho_k}\), ( \(\beta_{1,2}\) in the CLEO paper.)
 
vector< double > _rhophaseP
 Phase of the \(p\)-wave couplings of the rho resonance, \(g^P_{\rho_k}\), ( \(\beta_{1,2}\) in the CLEO paper.)
 
vector< Complex_rhocoupP
 \(p\)-wave couplings of the rho resonance, \(g^P_{\rho_k}\), ( \(\beta_{1,2}\) in the CLEO paper.)
 
vector< InvEnergy2 > _rhomagD
 Magnitude of the \(d\)-wave couplings of the rho resonance, \(g^D_{\rho_k}\), ( \(\beta_{3,4}\) in the CLEO paper.)
 
vector< double > _rhophaseD
 Phase of the \(d\)-wave couplings of the rho resonance, \(g^D_{\rho_k}\), ( \(\beta_{3,4}\) in the CLEO paper.)
 
vector< complex< InvEnergy2 > > _rhocoupD
 \(d\)-wave couplings of the rho resonance, \(g^D_{\rho_k}\), ( \(\beta_{3,4}\) in the CLEO paper.)
 
InvEnergy2 _f2mag
 Magntiude of the coupling of the \(f_2\) resonance, \(g_{f_2}\), ( \(\beta_5\) in the CLEO paper.)
 
double _f2phase
 Phase of the coupling of the \(f_2\) resonance, \(g_{f_2}\), ( \(\beta_5\) in the CLEO paper.)
 
complex< InvEnergy2 > _f2coup
 Coupling of the \(f_2\) resonance, \(g_{f_2}\), ( \(\beta_5\) in the CLEO paper.)
 
double _f0mag
 Magntiude of the coupling of the \(f_0(1370)\) resonance, \(g_{f_0}\), ( \(\beta_6\) in the CLEO paper.)
 
double _f0phase
 Phase of the coupling of the \(f_0(1370)\) resonance, \(g_{f_0}\), ( \(\beta_6\) in the CLEO paper.)
 
Complex _f0coup
 Coupling of the \(f_0(1370)\) resonance, \(g_{f_0}\), ( \(\beta_6\) in the CLEO paper.)
 
double _sigmamag
 Magntiude of the coupling of the \(\sigma\) resonance, \(g_\sigma\), ( \(\beta_7\) in the CLEO paper.)
 
double _sigmaphase
 Phase of the coupling of the \(\sigma\) resonance, \(g_\sigma\), ( \(\beta_7\) in the CLEO paper.)
 
Complex _sigmacoup
 Coupling of the \(\sigma\) resonance, \(g_\sigma\), ( \(\beta_7\) in the CLEO paper.)
 
vector< Energy > _a1runwidth
 The \(a_1\) width for the running \(a_1\) width calculation.
 
vector< Energy2 > _a1runq2
 The \(q^2\) for the running \(a_1\) width calculation.
 
Interpolator< Energy, Energy2 >::Ptr _a1runinter
 The interpolator for the running \(a_1\) width calculation.
 
bool _initializea1
 Initialize the running \(a_1\) width.
 
bool _a1opt
 Option for the \(a_1\) width.
 
Energy _maxmass
 The maximum mass of the hadronic system.
 
Energy _maxcalc
 The maximum mass when the running width was calculated.
 
virtual void doinit ()
 Initialize this object after the setup phase before saving and EventGenerator to disk.
 
virtual void doinitrun ()
 Initialize this object to the begining of the run phase.
 
virtual void doupdate ()
 Check sanity of the object during the setup phase.
 
ThreePionCLEOCurrentoperator= (const ThreePionCLEOCurrent &)=delete
 Private and non-existent assignment operator.
 
Energy a1width (Energy2 q2) const
 The \(a_1\) running width.
 
void inita1Width (int iopt)
 Initialize the \(a_1\) running width.
 
Complex a1BreitWigner (Energy2 q2) const
 \(a_1\) Breit-Wigner
 

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 ()
 Standard Init function used to initialize the interfaces.
 
void CLEOFormFactor (int imode, int ichan, Energy2 q2, Energy2 s1, Energy2 s2, Energy2 s3, Complex &F1, Complex &F2, Complex &F3) const
 Calculate CLEO form factors for the current.
 

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
 
- Static Protected Member Functions inherited from ThePEG::Interfaced
static void registerRepository (IBPtr)
 
static void registerRepository (IBPtr, string newName)
 

Detailed Description

The ThreePionCLEOCurrent class implements the decay of the weak current to three pions using the currents from CLEO Phys.

Rev. D 61,012002. This is a model including two \(\rho\) mesons in both \(s\) and \(p\) wave, a \(\sigma\), the \(f_2\) and \(f_0(1370)\).

The form factors for the \(a_1^+ \to \pi^0 \pi^0 \pi^+\) mode are

\[F_1=\sum_k\left\{g^P_{\rho_k}B_{\rho_k}^P(s_1) -\frac{g^D_{\rho_k}}3B_{\rho_k}^P(s_2) \left((s_3-m_{\pi^+}^2)-(s_1-m_{\pi^0}^2)\right)\right\} +\frac23\left(g_\sigma B^S_\sigma(s_3)+g_{f_0}B^S_{f_0}(s_3)\right) +\frac{g_{f_2}}{18s_3}(q^2-m_{\pi^+}^2+s_3)(4m_{\pi^0}^2-s_3)B^D_{f_2}(s_3) *\]

\[F_2=\sum_k\left\{-\frac13g^P_{\rho_k}B_{\rho_k}^P(s_2) -g^D_{\rho_k}B_{\rho_k}^P(s_1) \left((s_3-m_{\pi^+}^2)-(s_2-m_{\pi^0}^2)\right)\right\} +\frac23\left(g_\sigma B^S_\sigma(s_3)+g_{f_0}B^S_{f_0}(s_3)\right) +\frac1{18s_3}g_{f_2}(q^2-m_{\pi^+}^2+s_3)(4m_{\pi^0}^2-s_3)B^D_{f_2}(s_3) *\]

\[F_3=\sum_k g^D_{\rho_k}\left\{ -\frac13B_{\rho_k}^P(s_1)\left((s_3-m_{\pi^+}^2)-(s_2-m_{\pi^0}^2)\right) +\frac13B_{\rho_k}^P(s_2)\left((s_3-m_{\pi^+}^2)-(s_1-m_{\pi^0}^2)\right)\right\} -\frac{g_{f_2}}2(s_1-s_2)B^D_{f_2}(s_3)\]

The form factors for \(a_1^+\to \pi^+ \pi^+ \pi^-\) mode

\[F_1=\sum_k\left\{-g^P_{\rho_k}B_{\rho_k}^P(s_1) -\frac{g^D_{\rho_k}}3B_{\rho_k}^P(s_2)(s_1-s_3)\right\} -\frac23\left(g_\sigma B^S_\sigma(s_2)+g_{f_0} B^S_{f_0}(s_2)\right) +g_{f_2}\left(\frac12(s_3-s_2)B^D_{f_2}(s_1) -\frac1{18s_2}(4m_{\pi^+}^2-s_2)(q^2+s_2-m_{\pi^+}^2)B^D_{f_2}(s_2)\right)\]

\[F_2=\sum_k\left\{-g^P_{\rho_k}B_{\rho_k}^P(s_2) -\frac{g^D_{\rho_k}}3B_{\rho_k}^P(s_1)(s_2-s_3)\right\} -\frac23\left(g_\sigma B^S_\sigma(s_1)+g_{f_0} B^S_{f_0}(s_1)\right) +g_{f_2}\left(\frac12(s_3-s_1)B^D_{f_2}(s_2) -\frac1{18s_1}(4m_{\pi^+}^2-s_1)(q^2+s_1-m_{\pi^+}^2)B^D_{f_2}(s_1)\right)\]

\[F_3=\sum_k -g^D_{\rho_k}\left( \frac13(s_2-s_3)B_{\rho_k}^P(s_1) -\frac13(s_1-s_3)B_{\rho_k}^P(s_2)\right) -\frac23\left(g_\sigma B^S_\sigma(s_1)+g_{f_0}B^S_{f_0}(s_1)\right) +\frac23\left(g_\sigma B^S_\sigma(s_2)+g_{f_0}B^S_{f_0}(s_2)\right)\]

\[ +g_{f_2}\left(-\frac1{18s_1}(4m_{\pi^+}^2-s_1)(q^2+s_1-m_{\pi^+}^2)B^D_{f_2}(s_1) +\frac1{18s_2}(4m_{\pi^+}^2-s_2)(q^2+s_2-m_{\pi^+}^2)B^D_{f_2}(s_2)\right)\]

where

  • \(g_{f_2}\) is the coupling of the \(f_2\) to the \(a_1\)
  • \(g_{f_0}\) is the coupling of the \(f_0(1370)\) to the \(a_1\)
  • \(g_{\sigma}\) is the coupling of the \(\sigma\) to the \(a_1\)
  • \(g^P_{\rho_k}\) is the \(p\)-wave coupling of the \(\rho_k\) multiplet to the \(a_1\).
  • \(g^D_{\rho_k}\) is the \(d\)-wave coupling of the \(\rho_k\) multiplet to the \(a_1\).
  • \(s_3=m^2_{12}\) is the invariant mass squared of particles 1 and 2.
  • \(s_2=m^2_{13}\) is the invariant mass squared of particles 1 and 3.
  • \(s_1=m^2_{23}\) is the invariant mass squared of particles 2 and 3.

The Breit-Wigner factors are given by \(B^L_Y(s_i) = \frac{m^2_Y}{m^2_Y-s_i+im_Y\Gamma^{Y,L}(s_i)}\) where \(\Gamma^{Y,L}(s_i) = \Gamma^Y\left(\frac{p(s_i)}{p(M_Y}\right)^{2L+1}\frac{m_Y}{\sqrt{s_i}}\) \(m_Y\) and \(\Gamma^Y\) are the mass and width of the particle \(Y\) respectively. \(p(s_i)\) is the momentum of the outgoing pion in the rest frame of the resonance \(Y\).

See also
a1ThreePionCLEODecayer
ThreePionCLEOa1MatrixElement

Definition at line 98 of file ThreePionCLEOCurrent.h.

Member Function Documentation

◆ a1BreitWigner()

Complex Herwig::ThreePionCLEOCurrent::a1BreitWigner ( Energy2  q2) const
inlineprivate

\(a_1\) Breit-Wigner

Parameters
q2The scale \(q^2\) for the Breit-Wigner
Returns
The Breit-Wigner

Definition at line 320 of file ThreePionCLEOCurrent.h.

References _a1mass, a1width(), and ThePEG::sqrt().

◆ a1width()

Energy Herwig::ThreePionCLEOCurrent::a1width ( Energy2  q2) const
private

The \(a_1\) running width.

Parameters
q2The scale \(q^2\) for the Breit-Wigner
Returns
The \(a_1\) running width.

Referenced by a1BreitWigner().

◆ accept()

virtual bool Herwig::ThreePionCLEOCurrent::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.

◆ CLEOFormFactor()

void Herwig::ThreePionCLEOCurrent::CLEOFormFactor ( int  imode,
int  ichan,
Energy2  q2,
Energy2  s1,
Energy2  s2,
Energy2  s3,
Complex F1,
Complex F2,
Complex F3 
) const
protected

Calculate CLEO form factors for the current.

Implements the form factors described above.

Parameters
imodeThe mode
ichanThe phase space channel
q2The scale \(q^2\) for the current.
s1The invariant mass squared of particles 2 and 3, \(s_1=m^2_{23}\).
s2The invariant mass squared of particles 1 and 3, \(s_2=m^2_{13}\).
s3The invariant mass squared of particles 1 and 2, \(s_3=m^2_{12}\).
F1The form factor \(F_1\).
F2The form factor \(F_2\).
F3The form factor \(F_3\).

◆ clone()

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

Make a simple clone of this object.

Returns
a pointer to the new object.

Implements ThePEG::InterfacedBase.

Definition at line 262 of file ThreePionCLEOCurrent.h.

◆ createMode()

virtual bool Herwig::ThreePionCLEOCurrent::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::ThreePionCLEOCurrent::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::ThreePionCLEOCurrent::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::ThreePionCLEOCurrent::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::ThreePionCLEOCurrent::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.

◆ doinitrun()

virtual void Herwig::ThreePionCLEOCurrent::doinitrun ( )
protectedvirtual

Initialize this object to the begining of the run phase.

Reimplemented from ThePEG::InterfacedBase.

◆ doupdate()

virtual void Herwig::ThreePionCLEOCurrent::doupdate ( )
protectedvirtual

Check sanity of the object during the setup phase.

Reimplemented from ThePEG::InterfacedBase.

◆ fullclone()

virtual IBPtr Herwig::ThreePionCLEOCurrent::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 ThePEG::InterfacedBase.

Definition at line 268 of file ThreePionCLEOCurrent.h.

◆ inita1Width()

void Herwig::ThreePionCLEOCurrent::inita1Width ( int  iopt)
private

Initialize the \(a_1\) running width.

Parameters
ioptInitialization option (-1 full calculation, 0 set up the interpolation)

◆ particles()

virtual tPDVector Herwig::ThreePionCLEOCurrent::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::ThreePionCLEOCurrent::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::ThreePionCLEOCurrent::persistentOutput ( PersistentOStream os) const

Function used to write out object persistently.

Parameters
osthe persistent output stream written to.

◆ threeBodyMatrixElement()

double Herwig::ThreePionCLEOCurrent::threeBodyMatrixElement ( const int  iopt,
const Energy2  q2,
const Energy2  s3,
const Energy2  s2,
const Energy2  s1,
const Energy  m1,
const Energy  m2,
const Energy  m3 
) const

the matrix element for the a1 decay to calculate the running width

Parameters
ioptThe mode
q2The mass of the decaying off-shell \(a_1\), \(q^2\).
s3The invariant mass squared of particles 1 and 2, \(s_3=m^2_{12}\).
s2The invariant mass squared of particles 1 and 3, \(s_2=m^2_{13}\).
s1The invariant mass squared of particles 2 and 3, \(s_1=m^2_{23}\).
m1The mass of the first outgoing particle.
m2The mass of the second outgoing particle.
m3The mass of the third outgoing particle.
Returns
The matrix element squared summed over spins.

Friends And Related Function Documentation

◆ ThreePionCLEOa1MatrixElement

friend class ThreePionCLEOa1MatrixElement
friend

The matrix element for the running \(a_1\) width is a friend to keep some members private.

Definition at line 104 of file ThreePionCLEOCurrent.h.

Member Data Documentation

◆ _a1mass

Energy Herwig::ThreePionCLEOCurrent::_a1mass
private

The \(a_1\) mass.

Definition at line 382 of file ThreePionCLEOCurrent.h.

Referenced by a1BreitWigner().

◆ _a1opt

bool Herwig::ThreePionCLEOCurrent::_a1opt
private

Option for the \(a_1\) width.

Definition at line 528 of file ThreePionCLEOCurrent.h.

◆ _a1runinter

Interpolator<Energy,Energy2>::Ptr Herwig::ThreePionCLEOCurrent::_a1runinter
private

The interpolator for the running \(a_1\) width calculation.

Definition at line 518 of file ThreePionCLEOCurrent.h.

◆ _a1runq2

vector<Energy2> Herwig::ThreePionCLEOCurrent::_a1runq2
private

The \(q^2\) for the running \(a_1\) width calculation.

Definition at line 512 of file ThreePionCLEOCurrent.h.

◆ _a1runwidth

vector<Energy> Herwig::ThreePionCLEOCurrent::_a1runwidth
private

The \(a_1\) width for the running \(a_1\) width calculation.

Definition at line 507 of file ThreePionCLEOCurrent.h.

◆ _a1width

Energy Herwig::ThreePionCLEOCurrent::_a1width
private

The \(a_1\) width.

Definition at line 387 of file ThreePionCLEOCurrent.h.

◆ _f0coup

Complex Herwig::ThreePionCLEOCurrent::_f0coup
private

Coupling of the \(f_0(1370)\) resonance, \(g_{f_0}\), ( \(\beta_6\) in the CLEO paper.)

Definition at line 484 of file ThreePionCLEOCurrent.h.

◆ _f0mag

double Herwig::ThreePionCLEOCurrent::_f0mag
private

Magntiude of the coupling of the \(f_0(1370)\) resonance, \(g_{f_0}\), ( \(\beta_6\) in the CLEO paper.)

Definition at line 472 of file ThreePionCLEOCurrent.h.

◆ _f0mass

Energy Herwig::ThreePionCLEOCurrent::_f0mass
private

Mass of the \(f_0(1370)\) resonance.

Definition at line 352 of file ThreePionCLEOCurrent.h.

◆ _f0phase

double Herwig::ThreePionCLEOCurrent::_f0phase
private

Phase of the coupling of the \(f_0(1370)\) resonance, \(g_{f_0}\), ( \(\beta_6\) in the CLEO paper.)

Definition at line 478 of file ThreePionCLEOCurrent.h.

◆ _f0width

Energy Herwig::ThreePionCLEOCurrent::_f0width
private

Width of the \(f_0(1370)\) resonance.

Definition at line 357 of file ThreePionCLEOCurrent.h.

◆ _f2coup

complex<InvEnergy2> Herwig::ThreePionCLEOCurrent::_f2coup
private

Coupling of the \(f_2\) resonance, \(g_{f_2}\), ( \(\beta_5\) in the CLEO paper.)

Definition at line 466 of file ThreePionCLEOCurrent.h.

◆ _f2mag

InvEnergy2 Herwig::ThreePionCLEOCurrent::_f2mag
private

Magntiude of the coupling of the \(f_2\) resonance, \(g_{f_2}\), ( \(\beta_5\) in the CLEO paper.)

Definition at line 454 of file ThreePionCLEOCurrent.h.

◆ _f2mass

Energy Herwig::ThreePionCLEOCurrent::_f2mass
private

Mass of the \(f_2\) resonance.

Definition at line 342 of file ThreePionCLEOCurrent.h.

◆ _f2phase

double Herwig::ThreePionCLEOCurrent::_f2phase
private

Phase of the coupling of the \(f_2\) resonance, \(g_{f_2}\), ( \(\beta_5\) in the CLEO paper.)

Definition at line 460 of file ThreePionCLEOCurrent.h.

◆ _f2width

Energy Herwig::ThreePionCLEOCurrent::_f2width
private

Width of the \(f_2\) resonance.

Definition at line 347 of file ThreePionCLEOCurrent.h.

◆ _fact

InvEnergy Herwig::ThreePionCLEOCurrent::_fact
private

The prefactor.

Definition at line 412 of file ThreePionCLEOCurrent.h.

◆ _fpi

Energy Herwig::ThreePionCLEOCurrent::_fpi
private

pion decay constant

Definition at line 407 of file ThreePionCLEOCurrent.h.

◆ _gammk

double Herwig::ThreePionCLEOCurrent::_gammk
private

Coupling for the \(KK^*\) term in the running width.

Definition at line 402 of file ThreePionCLEOCurrent.h.

◆ _initializea1

bool Herwig::ThreePionCLEOCurrent::_initializea1
private

Initialize the running \(a_1\) width.

Definition at line 523 of file ThreePionCLEOCurrent.h.

◆ _maxcalc

Energy Herwig::ThreePionCLEOCurrent::_maxcalc
private

The maximum mass when the running width was calculated.

Definition at line 538 of file ThreePionCLEOCurrent.h.

◆ _maxmass

Energy Herwig::ThreePionCLEOCurrent::_maxmass
private

The maximum mass of the hadronic system.

Definition at line 533 of file ThreePionCLEOCurrent.h.

◆ _mK

Energy Herwig::ThreePionCLEOCurrent::_mK
private

Mass of the \(K\) resonace.

Definition at line 397 of file ThreePionCLEOCurrent.h.

◆ _mKstar

Energy Herwig::ThreePionCLEOCurrent::_mKstar
private

Mass of the \(K^*\) resonace.

Definition at line 392 of file ThreePionCLEOCurrent.h.

◆ _mpi0

Energy Herwig::ThreePionCLEOCurrent::_mpi0
private

Mass of the neutral pion.

Definition at line 372 of file ThreePionCLEOCurrent.h.

◆ _mpic

Energy Herwig::ThreePionCLEOCurrent::_mpic
private

Mass of the charged pion.

Definition at line 377 of file ThreePionCLEOCurrent.h.

◆ _rhocoupD

vector<complex<InvEnergy2> > Herwig::ThreePionCLEOCurrent::_rhocoupD
private

\(d\)-wave couplings of the rho resonance, \(g^D_{\rho_k}\), ( \(\beta_{3,4}\) in the CLEO paper.)

Definition at line 448 of file ThreePionCLEOCurrent.h.

◆ _rhocoupP

vector<Complex> Herwig::ThreePionCLEOCurrent::_rhocoupP
private

\(p\)-wave couplings of the rho resonance, \(g^P_{\rho_k}\), ( \(\beta_{1,2}\) in the CLEO paper.)

Definition at line 430 of file ThreePionCLEOCurrent.h.

◆ _rhomagD

vector<InvEnergy2> Herwig::ThreePionCLEOCurrent::_rhomagD
private

Magnitude of the \(d\)-wave couplings of the rho resonance, \(g^D_{\rho_k}\), ( \(\beta_{3,4}\) in the CLEO paper.)

Definition at line 436 of file ThreePionCLEOCurrent.h.

◆ _rhomagP

vector<double> Herwig::ThreePionCLEOCurrent::_rhomagP
private

Magnitude of the \(p\)-wave couplings of the rho resonance, \(g^P_{\rho_k}\), ( \(\beta_{1,2}\) in the CLEO paper.)

Definition at line 418 of file ThreePionCLEOCurrent.h.

◆ _rhomass

vector<Energy> Herwig::ThreePionCLEOCurrent::_rhomass
private

Masses of the \(\rho\) resonances.

Definition at line 332 of file ThreePionCLEOCurrent.h.

◆ _rhophaseD

vector<double> Herwig::ThreePionCLEOCurrent::_rhophaseD
private

Phase of the \(d\)-wave couplings of the rho resonance, \(g^D_{\rho_k}\), ( \(\beta_{3,4}\) in the CLEO paper.)

Definition at line 442 of file ThreePionCLEOCurrent.h.

◆ _rhophaseP

vector<double> Herwig::ThreePionCLEOCurrent::_rhophaseP
private

Phase of the \(p\)-wave couplings of the rho resonance, \(g^P_{\rho_k}\), ( \(\beta_{1,2}\) in the CLEO paper.)

Definition at line 424 of file ThreePionCLEOCurrent.h.

◆ _rhowidth

vector<Energy> Herwig::ThreePionCLEOCurrent::_rhowidth
private

Widths of the \(\rho\) resonances.

Definition at line 337 of file ThreePionCLEOCurrent.h.

◆ _sigmacoup

Complex Herwig::ThreePionCLEOCurrent::_sigmacoup
private

Coupling of the \(\sigma\) resonance, \(g_\sigma\), ( \(\beta_7\) in the CLEO paper.)

Definition at line 502 of file ThreePionCLEOCurrent.h.

◆ _sigmamag

double Herwig::ThreePionCLEOCurrent::_sigmamag
private

Magntiude of the coupling of the \(\sigma\) resonance, \(g_\sigma\), ( \(\beta_7\) in the CLEO paper.)

Definition at line 490 of file ThreePionCLEOCurrent.h.

◆ _sigmamass

Energy Herwig::ThreePionCLEOCurrent::_sigmamass
private

Mass of the \(\sigma\) resonance.

Definition at line 362 of file ThreePionCLEOCurrent.h.

◆ _sigmaphase

double Herwig::ThreePionCLEOCurrent::_sigmaphase
private

Phase of the coupling of the \(\sigma\) resonance, \(g_\sigma\), ( \(\beta_7\) in the CLEO paper.)

Definition at line 496 of file ThreePionCLEOCurrent.h.

◆ _sigmawidth

Energy Herwig::ThreePionCLEOCurrent::_sigmawidth
private

Width of the \(\sigma\) resonance.

Definition at line 367 of file ThreePionCLEOCurrent.h.


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