ThePEG
2.2.1
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The RSSpinorWaveFunction class is designed to store the wavefunction of a spin-3/2 particle in a form suitable for use in helicity amplitude calculations of the matrix element using a similar philosophy to the FORTRAN HELAS code. More...
#include <RSSpinorWaveFunction.h>
Public Member Functions | |
void | transform (const LorentzRotation &r) |
Perform the Lorentz transformation of the wave function. | |
Standard constructors and destructors. | |
RSSpinorWaveFunction (const Lorentz5Momentum &p, tcPDPtr part, complex< double > xs1, complex< double > xs2, complex< double > xs3, complex< double > xs4, complex< double > ys1, complex< double > ys2, complex< double > ys3, complex< double > ys4, complex< double > zs1, complex< double > zs2, complex< double > zs3, complex< double > zs4, complex< double > ts1, complex< double > ts2, complex< double > ts3, complex< double > ts4) | |
Constructor, set the momentum and the components of the spinor. More... | |
RSSpinorWaveFunction (const Lorentz5Momentum &p, tcPDPtr part, const LorentzRSSpinor< double > &wave, Direction dir=intermediate) | |
Constructor, set the momentum and the wavefunction. More... | |
RSSpinorWaveFunction (const tPPtr &p, const LorentzRSSpinor< SqrtEnergy > &wave, Direction dir=intermediate) | |
Constructor, set the momentum and the wavefunction. More... | |
RSSpinorWaveFunction (const Lorentz5Momentum &p, tcPDPtr part, unsigned int ihel, Direction dir) | |
Constructor, set the momentum, helicity, direction. More... | |
RSSpinorWaveFunction (const Lorentz5Momentum &p, tcPDPtr part, Direction dir) | |
Constructor, set the momentum, direction, zero the wavefunction. More... | |
RSSpinorWaveFunction () | |
Default constructor. | |
RSSpinorWaveFunction (vector< RSSpinorWaveFunction > &wave, tPPtr part, Direction dir, bool time, bool=true) | |
Special for spin correlations. | |
complex< double > | operator() (int i, int j) const |
Access to the wavefunction and its components. More... | |
const LorentzRSSpinor< double > & | wave () const |
return wavefunction as LorentzRSSpinor | |
LorentzRSSpinor< SqrtEnergy > | dimensionedWf () const |
Return wavefunction as LorentzRSSpinor<SqrtEnergy> | |
complex< double > | xs1 () const |
Get first spinor component for the x vector. | |
complex< double > | xs2 () const |
Get second spinor component for the x vector. | |
complex< double > | xs3 () const |
Get third spinor component for the x vector. | |
complex< double > | xs4 () const |
Get fourth spinor component for the x vector. | |
complex< double > | ys1 () const |
Get first spinor component for the y vector. | |
complex< double > | ys2 () const |
Get second spinor component for the y vector. | |
complex< double > | ys3 () const |
Get third spinor component for the y vector. | |
complex< double > | ys4 () const |
Get fourth spinor component for the y vector. | |
complex< double > | zs1 () const |
Get first spinor component for the z vector. | |
complex< double > | zs2 () const |
Get second spinor component for the z vector. | |
complex< double > | zs3 () const |
Get third spinor component for the z vector. | |
complex< double > | zs4 () const |
Get fourth spinor component for the z vector. | |
complex< double > | ts1 () const |
Get first spinor component for the t vector. | |
complex< double > | ts2 () const |
Get second spinor component for the t vector. | |
complex< double > | ts3 () const |
Get third spinor component for the t vector. | |
complex< double > | ts4 () const |
Get fourth spinor component for the t vector. | |
void | reset (unsigned int ihel) |
reset functions More... | |
Public Member Functions inherited from ThePEG::Helicity::WaveFunctionBase | |
WaveFunctionBase () | |
Constructors. More... | |
WaveFunctionBase (const Lorentz5Momentum &p, tcPDPtr pd, Direction dir=intermediate) | |
Energy | px () const |
Access to the momentum components and mass. More... | |
Energy | py () const |
Get the y component of the momentum. | |
Energy | pz () const |
Get the z component of the momentum. | |
Energy | e () const |
Get the energy. | |
Energy | mass () const |
Get the mass. | |
Energy2 | m2 () const |
Get off-shell mass squared. | |
const Lorentz5Momentum & | momentum () const |
Access to the 5-momentum. | |
long | id () const |
Access to the particle properties. More... | |
PDT::Spin | iSpin () const |
Get 2s+1 for the particle. | |
tcPDPtr | particle () const |
Get the particle pointer. | |
ThePEG::Helicity::Direction | direction () const |
Get the direction of particle. | |
void | direction (ThePEG::Helicity::Direction in) |
Set the direction of the particle. | |
Static Public Member Functions | |
static void | calculateWaveFunctions (vector< LorentzRSSpinor< SqrtEnergy > > &waves, tPPtr particle, Direction) |
Calculate the wavefunctions. | |
static void | calculateWaveFunctions (vector< RSSpinorWaveFunction > &waves, tPPtr particle, Direction) |
Calculate the wavefunctions. | |
static void | calculateWaveFunctions (vector< RSSpinorWaveFunction > &waves, const Lorentz5Momentum &momentum, tcPDPtr parton, Direction) |
Calculate the wavefunctions. | |
static void | calculateWaveFunctions (vector< LorentzRSSpinor< SqrtEnergy > > &waves, RhoDMatrix &rho, tPPtr particle, Direction) |
Calculate the wavefunctions. | |
static void | calculateWaveFunctions (vector< RSSpinorWaveFunction > &waves, RhoDMatrix &rho, tPPtr particle, Direction) |
Calculate the wavefunctions. | |
static void | constructSpinInfo (const vector< LorentzRSSpinor< SqrtEnergy > > &waves, tPPtr part, Direction dir, bool time) |
Construct the SpinInfo object. | |
static void | constructSpinInfo (const vector< RSSpinorWaveFunction > &waves, tPPtr part, Direction dir, bool time) |
Construct the SpinInfo object. | |
Private Member Functions | |
void | calculateWaveFunction (unsigned int ihel) |
Calcuate the wavefunction. More... | |
Private Attributes | |
LorentzRSSpinor< double > | _wf |
storage of the Lorentz RSSpinor | |
Additional Inherited Members | |
Protected Member Functions inherited from ThePEG::Helicity::WaveFunctionBase | |
void | transformMomentum (const LorentzRotation &r) |
Perform the Lorentz transformation of the wave function. | |
The RSSpinorWaveFunction class is designed to store the wavefunction of a spin-3/2 particle in a form suitable for use in helicity amplitude calculations of the matrix element using a similar philosophy to the FORTRAN HELAS code.
In addition to storing the spinor using the LorentzRSSpinor class it inherits from the WaveFunctionBase
class to provide storage of the momentum and ParticleData for the fermion.
This class also contains the code which does the actually calculation of the spinor for an external particle.
When calculating the wavefunction the direction of the particle is used,
i.e.
The spinors are calculated using a Clebsch-Gordon decomposition in the rest-frame for a massive particle and boosted to the lab-frame. For massless particles the calculation is performed in the lab-frame (N.B. there are only two helicities in this case.)
N.B. In our convention 0 is the helicity state, 1 is the helicity state, 2 is the helicity state 3 is the helicity state and
Definition at line 58 of file RSSpinorWaveFunction.h.
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Constructor, set the momentum and the components of the spinor.
p | The momentum. |
part | The ParticleData pointer. |
xs1 | The first spinor component of the vector. |
xs2 | The second spinor component of the vector. |
xs3 | The third spinor component of the vector. |
xs4 | The fourth spinor component of the vector. |
ys1 | The first spinor component of the vector. |
ys2 | The second spinor component of the vector. |
ys3 | The third spinor component of the vector. |
ys4 | The fourth spinor component of the vector. |
zs1 | The first spinor component of the vector. |
zs2 | The second spinor component of the vector. |
zs3 | The third spinor component of the vector. |
zs4 | The fourth spinor component of the vector. |
ts1 | The first spinor component of the vector. |
ts2 | The second spinor component of the vector. |
ts3 | The third spinor component of the vector. |
ts4 | The fourth spinor component of the vector. |
Definition at line 85 of file RSSpinorWaveFunction.h.
References ThePEG::Helicity::WaveFunctionBase::iSpin().
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inline |
Constructor, set the momentum and the wavefunction.
p | The momentum. |
part | The ParticleData pointer. |
wave | The wavefunction. |
dir | The direction of the particle |
Definition at line 109 of file RSSpinorWaveFunction.h.
References ThePEG::Helicity::WaveFunctionBase::iSpin().
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inline |
Constructor, set the momentum and the wavefunction.
p | The Particle pointer. |
wave | The wavefunction. |
dir | The direction of the particle |
Definition at line 123 of file RSSpinorWaveFunction.h.
References _wf, ThePEG::Helicity::WaveFunctionBase::iSpin(), and wave().
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inline |
Constructor, set the momentum, helicity, direction.
p | The momentum. |
part | The ParticleData pointer. |
ihel | The helicity (0,1,2,3 as described above.) |
dir | The direction. |
Definition at line 141 of file RSSpinorWaveFunction.h.
References calculateWaveFunction(), and ThePEG::Helicity::WaveFunctionBase::iSpin().
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inline |
Constructor, set the momentum, direction, zero the wavefunction.
p | The momentum. |
part | The ParticleData pointer. |
dir | The direction. |
Definition at line 156 of file RSSpinorWaveFunction.h.
References ThePEG::Helicity::WaveFunctionBase::iSpin().
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Calcuate the wavefunction.
ihel | The helicity (0,1,2,3 as described above.) |
Referenced by reset(), RSSpinorWaveFunction(), and transform().
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Access to the wavefunction and its components.
subscript operator for the wavefunction Set components by index.
Definition at line 187 of file RSSpinorWaveFunction.h.
References _wf.
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reset functions
Reset the helicity (calculates the new spinor).
ihel | The helicity (0,1,2,3 as described above.) |
Definition at line 295 of file RSSpinorWaveFunction.h.
References calculateWaveFunction().