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Public Member Functions | Static Public Member Functions | Protected Member Functions | Private Member Functions | Private Attributes
Herwig::KaonThreeMesonCurrent Class Reference

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

#include <KaonThreeMesonCurrent.h>

Inheritance diagram for Herwig::KaonThreeMesonCurrent:
Inheritance graph
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List of all members.

Public Member Functions

 KaonThreeMesonCurrent ()
 The default constructor.
virtual void dataBaseOutput (ofstream &os, bool header, bool create) const
 Output the setup information for the particle database.
double threeBodyMatrixElement (const int imode, 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 $a_1$ decay to calculate the running width
Methods for the construction of the phase space integrator.
virtual bool createMode (int icharge, unsigned int imode, DecayPhaseSpaceModePtr mode, unsigned int iloc, unsigned int ires, DecayPhaseSpaceChannelPtr phase, Energy upp)
 Complete the construction of the decay mode for integration.
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 Public Member Functions

static void Init ()
 The standard Init function used to initialize the interfaces.

Protected Member Functions

virtual bool acceptMode (int) const
 Can the current handle a particular set of mesons.
virtual FormFactors calculateFormFactors (const int ichan, const int imode, Energy2 q2, Energy2 s1, Energy2 s2, Energy2 s3) const
 Calculate the form factor for the current.
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.
Standard Interfaced functions.
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.

Private Member Functions

KaonThreeMesonCurrent & operator= (const KaonThreeMesonCurrent &)
 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 Trho2 (Energy2 q2, int ires) const
 The $\rho$ lineshape for the 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 $\rho$ lineshape for the vector terms.
Complex BWrho1 (Energy2 q2, unsigned int ires) const
 The $\rho$ Breit-Wigner for the axial-vector terms.
Complex BWrho2 (Energy2 q2, unsigned int ires) const
 The $\rho$ Breit-Wigner for the vector terms.
Complex BWKstar1 (Energy2 q2, unsigned int ires) const
 The $K^*$ Breit-Wigner for the axial-vector terms.
Complex BWKstar2 (Energy2 q2, unsigned int ires) const
 The $K^*$ Breit-Wigner for the vector terms.
Complex a1BreitWigner (Energy2 q2) const
 $a_1$ Breit-Wigner
Complex TK1 (Energy2 q2, unsigned int iopt, int ires) const
 The $K_1$ line shape.
Complex K1BreitWigner (Energy2 q2, unsigned int ires) const
 The $K_1$ Breit-Wigner.
Energy a1Width (Energy2 q2) const
 The $a_1$ running width.
double g (Energy2 q2) const
 The $g(Q^2)$ function of Kuhn and Santamaria.
void inita1Width (int iopt)
 Initialize the $a_1$ running width.
Complex Tomega (Energy2 q2, int ires) const
 The $T_\omega$ function.
Complex OmegaPhiBreitWigner (Energy2 q2, unsigned int ires) const
 The $\omega$ and $\phi$ Breit-Wigner.
Complex TOmegaKStar (Energy2 s1, Energy2 s2, int ires) const
 The $\omega-\phi$ $K^*$ form-factor for the $F_5$ form-factor.

Private Attributes

double _omegaKstarwgt
 The relative weight of the $\omega-\phi$ and $K^*$ where needed.
Energy _fpi
 The pion decay constant, $f_\pi$.
Energy _mpi
 The pion mass.
Energy _mK
 The kaon mass.
Energy _maxmass
 The maximum mass of the hadronic system.
Energy _maxcalc
 The maximum mass when the running width was calculated.
vector< double > _rho1wgts
 Parameters for the $\rho$ in the axial-vector terms.
vector< Energy > _rho1mass
 Masses.
vector< Energy > _rho1width
 Widths.
vector< double > _rho2wgts
 Parameters for the $\rho$ in the vector terms.
vector< Energy > _rho2mass
 Masses.
vector< Energy > _rho2width
 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.
Energy _a1mass
 Parameters for the three meson resonances.
Energy _a1width
 The width of the $a_1$ resonances.
vector< Energy > _k1mass
 The masses of the $aK1$ 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 $K_1\to\rho K$.
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.
double _epsomega
 Parameters for the $T_\omega$ function.
Energy _omegamass
 Mass of the $\omega$.
Energy _omegawidth
 Width of the $\omega$.
Energy _phimass
 Mass of the $\phi$.
Energy _phiwidth
 Width of the $\phi$.
bool _initializea1
 Initialization switches.
bool _rhoparameters
 use local values of the $\rho$ masses and widths
bool _kstarparameters
 use local values of the $K^*$ resonances masses and widths
bool _a1parameters
 Use local values of the $a_1$ parameters.
bool _k1parameters
 Use local values of the $K_1$ parameters.
bool _a1opt
 Option for the $a_1$ width.
bool _omegaopt
 Option for the $\omega-\phi$ parameters.

Detailed Description

The KaonThreeMesonCurrent 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.

See also:
The interfaces defined for KaonThreeMesonCurrent.

Definition at line 30 of file KaonThreeMesonCurrent.h.

Member Function Documentation

Complex Herwig::KaonThreeMesonCurrent::a1BreitWigner ( Energy2  q2) const [private]

$a_1$ Breit-Wigner

Parameters:
q2The scale $q^2$ for the Breit-Wigner
Returns:
The Breit-Wigner
Energy Herwig::KaonThreeMesonCurrent::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.
virtual bool Herwig::KaonThreeMesonCurrent::acceptMode ( int  ) const [protected, virtual]

Can the current handle a particular set of mesons.

As this current includes all the allowed modes this is always true.

Implements Herwig::ThreeMesonCurrentBase.

Complex Herwig::KaonThreeMesonCurrent::BWKstar1 ( Energy2  q2,
unsigned int  ires 
) const [private]

The $K^*$ Breit-Wigner for the axial-vector terms.

Parameters:
q2The scale $q^2$ for the Breit-Wigner
iresWhich $K^*$ multiplet
Complex Herwig::KaonThreeMesonCurrent::BWKstar2 ( Energy2  q2,
unsigned int  ires 
) const [private]

The $K^*$ Breit-Wigner for the vector terms.

Parameters:
q2The scale $q^2$ for the Breit-Wigner
iresWhich $K^*$ multiplet
Complex Herwig::KaonThreeMesonCurrent::BWrho1 ( Energy2  q2,
unsigned int  ires 
) const [private]

The $\rho$ Breit-Wigner for the axial-vector terms.

Parameters:
q2The scale $q^2$ for the Breit-Wigner
iresWhich $\rho$ multiplet
Complex Herwig::KaonThreeMesonCurrent::BWrho2 ( Energy2  q2,
unsigned int  ires 
) const [private]

The $\rho$ Breit-Wigner for the vector terms.

Parameters:
q2The scale $q^2$ for the Breit-Wigner
iresWhich $\rho$ multiplet
virtual FormFactors Herwig::KaonThreeMesonCurrent::calculateFormFactors ( const int  ichan,
const int  imode,
Energy2  q2,
Energy2  s1,
Energy2  s2,
Energy2  s3 
) const [protected, virtual]

Calculate the form factor for the current.

Implements the form factors described above.

Parameters:
ichanThe phase space channel
imodeThe mode
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, $s_3=m^2_{12}$.

Implements Herwig::ThreeMesonCurrentBase.

virtual IBPtr Herwig::KaonThreeMesonCurrent::clone ( ) const [protected, virtual]

Make a simple clone of this object.

Returns:
a pointer to the new object.

Implements ThePEG::InterfacedBase.

virtual bool Herwig::KaonThreeMesonCurrent::createMode ( int  icharge,
unsigned int  imode,
DecayPhaseSpaceModePtr  mode,
unsigned int  iloc,
unsigned int  ires,
DecayPhaseSpaceChannelPtr  phase,
Energy  upp 
) [virtual]

Complete the construction of the decay mode for integration.

This version addes the mesons for the current

Parameters:
ichargeThe total charge of the outgoing particles in the current.
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::WeakDecayCurrent.

virtual void Herwig::KaonThreeMesonCurrent::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::ThreeMesonCurrentBase.

virtual void Herwig::KaonThreeMesonCurrent::doinit ( ) [protected, virtual]

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.

virtual IBPtr Herwig::KaonThreeMesonCurrent::fullclone ( ) const [protected, virtual]

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.

static void Herwig::KaonThreeMesonCurrent::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.

Reimplemented from Herwig::ThreeMesonCurrentBase.

void Herwig::KaonThreeMesonCurrent::inita1Width ( int  iopt) [private]

Initialize the $a_1$ running width.

Parameters:
ioptInitialization option (-1 full calculation, 0 set up the interpolation)
Complex Herwig::KaonThreeMesonCurrent::K1BreitWigner ( Energy2  q2,
unsigned int  ires 
) const [private]

The $K_1$ Breit-Wigner.

Parameters:
q2The scale $q^2$ for the Breit-Wigner
iresthe resonance
Returns:
The Breit-Wigner
Complex Herwig::KaonThreeMesonCurrent::OmegaPhiBreitWigner ( Energy2  q2,
unsigned int  ires 
) const [private]

The $\omega$ and $\phi$ Breit-Wigner.

Parameters:
q2The scale
iresthe resonance
KaonThreeMesonCurrent& Herwig::KaonThreeMesonCurrent::operator= ( const KaonThreeMesonCurrent &  ) [private]

The assignment operator is private and must never be called.

In fact, it should not even be implemented.

void Herwig::KaonThreeMesonCurrent::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.

Reimplemented from Herwig::WeakDecayCurrent.

void Herwig::KaonThreeMesonCurrent::persistentOutput ( PersistentOStream &  os) const

Function used to write out object persistently.

Parameters:
osthe persistent output stream written to.

Reimplemented from Herwig::WeakDecayCurrent.

double Herwig::KaonThreeMesonCurrent::threeBodyMatrixElement ( const int  imode,
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 $a_1$ decay to calculate the running width

Parameters:
imodeThe mode for which the matrix element is needed.
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.
Complex Herwig::KaonThreeMesonCurrent::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
Complex Herwig::KaonThreeMesonCurrent::TKstar1 ( Energy2  q2,
int  ires 
) const [private]

The $K^*$ lineshape for the axial-vector terms.

Parameters:
q2The scale $q^2$ for the lineshape
iresWhich $K^*$ multiplet
Complex Herwig::KaonThreeMesonCurrent::TKstar2 ( Energy2  q2,
int  ires 
) const [private]

The $\rho$ lineshape for the vector terms.

Parameters:
q2The scale $q^2$ for the lineshape
iresWhich $K^*$ multiplet
Complex Herwig::KaonThreeMesonCurrent::Tomega ( Energy2  q2,
int  ires 
) const [private]

The $T_\omega$ function.

Parameters:
q2The scale
iresthe resonance
Complex Herwig::KaonThreeMesonCurrent::TOmegaKStar ( Energy2  s1,
Energy2  s2,
int  ires 
) const [private]

The $\omega-\phi$ $K^*$ form-factor for the $F_5$ form-factor.

Parameters:
s1The scale $s_1$.
s2The scale $s_2$.
iresWhich resonances to use
Returns:
The mixed Breit-Wigner
Complex Herwig::KaonThreeMesonCurrent::Trho1 ( Energy2  q2,
int  ires 
) const [private]

The $\rho$ lineshape for the axial-vector terms.

Parameters:
q2The scale $q^2$ for the lineshape
iresWhich $\rho$ multiplet
Complex Herwig::KaonThreeMesonCurrent::Trho2 ( Energy2  q2,
int  ires 
) const [private]

The $\rho$ lineshape for the vector terms.

Parameters:
q2The scale $q^2$ for the lineshape
iresWhich $\rho$ multiplet

Member Data Documentation

Energy Herwig::KaonThreeMesonCurrent::_a1mass [private]

Parameters for the three meson resonances.

The mass of the $a_1$ resonances.

Definition at line 390 of file KaonThreeMesonCurrent.h.

double Herwig::KaonThreeMesonCurrent::_epsomega [private]

Parameters for the $T_\omega$ function.

Mixing parameter

Definition at line 440 of file KaonThreeMesonCurrent.h.

bool Herwig::KaonThreeMesonCurrent::_initializea1 [private]

Initialization switches.

Initialize the running $a_1$ width.

Definition at line 490 of file KaonThreeMesonCurrent.h.

vector<double> Herwig::KaonThreeMesonCurrent::_kstar1wgts [private]

Parameters for the $K^*$ in the axial-vector terms.

Weight for the different resonances

Definition at line 350 of file KaonThreeMesonCurrent.h.

vector<double> Herwig::KaonThreeMesonCurrent::_kstar2wgts [private]

Parameters for the $K^*$ in the vector terms.

Weight for the different resonances

Definition at line 370 of file KaonThreeMesonCurrent.h.

vector<double> Herwig::KaonThreeMesonCurrent::_rho1wgts [private]

Parameters for the $\rho$ in the axial-vector terms.

Weight for the different resonances

Definition at line 310 of file KaonThreeMesonCurrent.h.

vector<double> Herwig::KaonThreeMesonCurrent::_rho2wgts [private]

Parameters for the $\rho$ in the vector terms.

Weight for the different resonances

Definition at line 330 of file KaonThreeMesonCurrent.h.

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