ThePEG
1.8.0
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The VVTVertex class is the implementation of the vector-vector-tensor vertex. More...
#include <VVTVertex.h>
Public Member Functions | |
virtual void | setCoupling (Energy2 q2, tcPDPtr part1, tcPDPtr part2, tcPDPtr part3)=0 |
Calculate the couplings. | |
Complex | evaluate (Energy2 q2, const VectorWaveFunction &vec1, const VectorWaveFunction &vec2, const TensorWaveFunction &ten3, Energy vmass=-GeV) |
Members to calculate the helicity amplitude expressions for vertices and off-shell particles. | |
TensorWaveFunction | evaluate (Energy2 q2, int iopt, tcPDPtr out, const VectorWaveFunction &vec1, const VectorWaveFunction &vec2, Energy vmass=-GeV, complex< Energy > mass=-GeV, complex< Energy > width=-GeV) |
Evaluate the off-shell tensor coming from the vertex. | |
VectorWaveFunction | evaluate (Energy2 q2, int iopt, tcPDPtr out, const VectorWaveFunction &vec1, const TensorWaveFunction &ten3, complex< Energy > mass=-GeV, complex< Energy > width=-GeV) |
Evaluate the off-shell vector coming from the vertex. | |
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AbstractVVTVertex () | |
Default constructor. | |
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VertexBase (VertexType::T name, bool kine=false) | |
Constructor for ![]() | |
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. | |
unsigned int | size () const |
Access to the particle information. | |
bool | isIncoming (tPDPtr p) const |
Is a particle allowed as an incoming particle? | |
bool | isOutgoing (tPDPtr p) const |
Is a particle allowed as an outgoing particle? | |
const set< tPDPtr > & | incoming () const |
Get the list of incoming particles. | |
const set< tPDPtr > & | outgoing () const |
Get the list of outgoing particles. | |
Complex | norm () const |
Get the coupling. | |
vector< long > | search (unsigned int ilist, long id) const |
Function to search the list. | |
vector< tPDPtr > | search (unsigned int ilist, tcPDPtr id) const |
Function to search the list. | |
bool | allowed (long id1, long id2, long id3, long id4=0) const |
Is a given combination allowed. | |
VertexType::T | getName () const |
Get name of Vertex. | |
unsigned int | getNpoint () const |
Get number of lines on Vertex. | |
unsigned int | orderInGem () const |
Get the order in ![]() | |
unsigned int | orderInGs () const |
Get the order in ![]() | |
double | strongCoupling (Energy2 q2) const |
Strong coupling. | |
double | electroMagneticCoupling (Energy2 q2) const |
Electromagnetic coupling. | |
double | weakCoupling (Energy2 q2) const |
Weak coupling. | |
double | sin2ThetaW () const |
bool | kinematics () const |
Whether or not to calculate the kinematics invariants. | |
void | kinematics (bool kine) |
Set whether or not to calculate the kinematics invariants. | |
void | calculateKinematics (const Lorentz5Momentum &p0, const Lorentz5Momentum &p1, const Lorentz5Momentum &p2) |
Calculate the kinematics for a 3-point vertex. | |
void | calculateKinematics (const Lorentz5Momentum &p0, const Lorentz5Momentum &p1, const Lorentz5Momentum &p2, const Lorentz5Momentum &p3) |
Calculate the kinematics for a 4-point vertex. | |
void | calculateKinematics (const vector< Lorentz5Momentum > &p) |
Calculate the kinematics for a n-point vertex. | |
Energy2 | invariant (unsigned int ix, unsigned int iy) const |
Get one of the kinematic invariants. | |
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virtual | ~Interfaced () |
Empty virtual destructor. | |
virtual bool | defaultInit () |
Functions which are to be used during the actual event generation, after the setup is complete. | |
PPtr | getParticle (PID) const |
Create a new Particle instance given a id number. | |
PDPtr | getParticleData (PID) const |
Return a pointer to the ParticleData object corresponding to the given id number. | |
bool | used () const |
Returns true if this object has actally been used. | |
void | useMe () const |
Should be called to indicate that this object has actually been used. | |
tEGPtr | generator () const |
Return a pointer to the EventGenerator controlling the run. | |
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virtual | ~InterfacedBase () |
The virtual (empty) destructor;. | |
string | fullName () const |
Returns the full name of this object including its path, e.g. | |
string | name () const |
Returns the name of this object, without the path. | |
string | path () const |
Returns the path to this object including the trailing '/'. | |
string | comment () const |
Returns a comment assigned to this object. | |
void | setup (istream &is) |
Read setup info from a standard istream is. | |
virtual IBPtr | fullclone () const |
Return a full clone of this object possibly doing things to the clone to make it sane. | |
virtual void | debugme () const |
Print out debugging information for this object on std::cerr. | |
void | update () |
Calls the doupdate() function with recursion prevention. | |
void | init () |
Calls the doinit() function with recursion prevention. | |
virtual bool | preInitialize () const |
Return true if this object needs to be initialized before all other objects (except those for which this function also returns true). | |
void | initrun () |
Calls the doinitrun() function with recursion prevention. | |
void | finish () |
Calls the dofinish() function with recursion prevention. | |
void | touch () |
This function should be called every time something in this object has changed in a way that a sanity check with update() is needed. | |
void | reset () |
Set the state of this object to uninitialized. | |
void | clear () |
Calls reset() and unTouch(). | |
InitState | state () const |
Return the state of initialization of this object. | |
bool | locked () const |
Return true if the BaseRepository is not allowed to change the state of this object. | |
bool | touched () const |
Return true if the state of this object has been changed since the last call to update(). | |
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virtual | ~Base () |
The virtual destructor. | |
void | debug () const |
Print out debugging information for this object on std::cerr. | |
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CounterType | referenceCount () const |
Return the reference count. | |
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Named (const string &newName=string()) | |
Constructor with name. | |
bool | operator== (const Named &other) const |
Test for equality. | |
bool | operator< (const Named &other) const |
Lexicographical comparison. |
Static Public Member Functions | |
static void | Init () |
Standard Init function used to initialize the interfaces. |
Private Member Functions | |
VVTVertex & | operator= (const VVTVertex &) |
Private and non-existent assignment operator. |
Static Private Attributes | |
static AbstractNoPIOClassDescription < VVTVertex > | initVVTVertex |
Describe a concrete class with persistent data. |
The VVTVertex class is the implementation of the vector-vector-tensor vertex.
It inherits from the AbstractVVTVertex class for the storage of the particles interacting at the vertex and implements the helicity amplitude calculations.
All implementations of this vertex should inherit from it and implement the virtual setCoupling member.
The vertex has the form
where
Definition at line 46 of file VVTVertex.h.
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virtual |
Members to calculate the helicity amplitude expressions for vertices and off-shell particles.
Evalulate the vertex.
q2 | The scale ![]() |
vec1 | The wavefunction for the first vector. |
vec2 | The wavefunction for the second vector. |
ten3 | The wavefunction for the tensor. |
vmass | The mass of the vector boson. |
Implements ThePEG::Helicity::AbstractVVTVertex.
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virtual |
Evaluate the off-shell tensor coming from the vertex.
q2 | The scale ![]() |
iopt | Option of the shape of the Breit-Wigner for the off-shell tensor. |
out | The ParticleData pointer for the off-shell tensor. |
vec1 | The wavefunction for the first vector. |
vec2 | The wavefunction for the second vector. |
vmass | The mass of the vector boson. |
mass | The mass of the off-shell particle if not taken from the ParticleData object |
width | The width of the off-shell particle if not taken from the ParticleData object |
Implements ThePEG::Helicity::AbstractVVTVertex.
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virtual |
Evaluate the off-shell vector coming from the vertex.
q2 | The scale ![]() |
iopt | Option of the shape of the Breit-Wigner for the off-shell vector. |
out | The ParticleData pointer for the off-shell vector. |
vec1 | The wavefunction for the first vector. |
ten3 | The wavefunction for the tensor. |
mass | The mass of the off-shell particle if not taken from the ParticleData object |
width | The width of the off-shell particle if not taken from the ParticleData object |
Implements ThePEG::Helicity::AbstractVVTVertex.
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pure virtual |
Calculate the couplings.
This method is virtual and must be implemented in classes inheriting from this.
q2 | The scale ![]() |
part1 | The ParticleData pointer for the first particle. |
part2 | The ParticleData pointer for the second particle. |
part3 | The ParticleData pointer for the third particle. |