ThePEG 2.3.0
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The GeneralVVSVertex class implements a general Vector-Vector-Scalar vertex allowing for decay modes that only enter at the one-loop level. More...
#include <GeneralVVSVertex.h>
Public Member Functions | |
GeneralVVSVertex () | |
The default constructor. | |
virtual Complex | evaluate (Energy2 q2, const VectorWaveFunction &vec1, const VectorWaveFunction &vec2, const ScalarWaveFunction &sca3) |
Members to calculate the helicity amplitude expressions for vertices and off-shell particles. | |
virtual VectorWaveFunction | evaluate (Energy2 q2, int iopt, tcPDPtr out, const VectorWaveFunction &vec2, const ScalarWaveFunction &sca3, complex< Energy > mass=-GeV, complex< Energy > width=-GeV) |
Evaluate the off-shell vector coming from the vertex. | |
virtual ScalarWaveFunction | evaluate (Energy2 q2, int iopt, tcPDPtr out, const VectorWaveFunction &vec1, const VectorWaveFunction &vec2, complex< Energy > mass=-GeV, complex< Energy > width=-GeV) |
Evaluate the off-shell scalar coming from the vertex. | |
virtual void | setCoupling (Energy2 q2, tcPDPtr part1, tcPDPtr part2, tcPDPtr part3)=0 |
Set coupling methods. | |
virtual void | setCoupling (Energy2, tcPDPtr, tcPDPtr, tcPDPtr, tcPDPtr) |
Dummy setCouplings for a four point interaction This method is virtual and must be implemented in classes inheriting from this. | |
Public Member Functions inherited from ThePEG::Helicity::AbstractVVSVertex | |
AbstractVVSVertex () | |
Default constructor. | |
virtual Complex | evaluate (Energy2 q2, const VectorWaveFunction &vec1, const VectorWaveFunction &vec2, const ScalarWaveFunction &sca3)=0 |
Members to calculate the helicity amplitude expressions for vertices and off-shell particles. | |
virtual VectorWaveFunction | evaluate (Energy2 q2, int iopt, tcPDPtr out, const VectorWaveFunction &vec2, const ScalarWaveFunction &sca3, complex< Energy > mass=-GeV, complex< Energy > width=-GeV)=0 |
Evaluate the off-shell vector coming from the vertex. | |
virtual ScalarWaveFunction | evaluate (Energy2 q2, int iopt, tcPDPtr out, const VectorWaveFunction &vec1, const VectorWaveFunction &vec2, complex< Energy > mass=-GeV, complex< Energy > width=-GeV)=0 |
Evaluate the off-shell scalar coming from the vertex. | |
Public Member Functions inherited from ThePEG::Helicity::VertexBase | |
VertexBase (VertexType::T name, bool kine=false) | |
Constructor for \(n\)-point vertices. | |
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. | |
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. | |
int | orderInGem () const |
Get the order in \(g_EM\). | |
int | orderInGs () const |
Get the order in \(g_s\). | |
int | orderInCoupling (CouplingType::T cType) const |
Get the order in a specific coupling. | |
int | orderInAllCouplings () const |
Get the total order of the vertex. | |
ColourStructure::T | colourStructure () const |
Get the colour structure. | |
Public Member Functions inherited from ThePEG::Interfaced | |
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. | |
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::InterfacedBase | |
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. | |
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(). | |
virtual IBPtr | fullclone () const |
Return a full clone of this object possibly doing things to the clone to make it sane. | |
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. | |
virtual void | debugme () const |
Print out debugging information for this object on std::cerr. | |
Public Member Functions inherited from ThePEG::Base | |
virtual | ~Base () |
The virtual destructor. | |
void | debug () const |
Print out debugging information for this object on std::cerr. | |
virtual void | debugme () const |
Print out debugging information for this object on std::cerr. | |
Public Member Functions inherited from ThePEG::Pointer::ReferenceCounted | |
CounterType | referenceCount () const |
Return the reference count. | |
Public Member Functions inherited from ThePEG::Named | |
Named (const string &newName=string()) | |
Constructor with name. | |
Named (const Named &)=default | |
Explicit default copy-constructor (too avoid compiler warnings) | |
const string & | name () const |
Return 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 () |
The standard Init function used to initialize the interfaces. | |
Static Public Member Functions inherited from ThePEG::Helicity::AbstractVVSVertex | |
static void | Init () |
The standard Init function used to initialize the interfaces. | |
Static Public Member Functions inherited from ThePEG::Helicity::VertexBase | |
static void | Init () |
Standard Init function used to initialize the interfaces. | |
Static Public Member Functions inherited from ThePEG::Interfaced | |
static void | Init () |
Standard Init function. | |
Static Public Member Functions inherited from ThePEG::InterfacedBase | |
static void | Init () |
Standard Init function. | |
Static Public Member Functions inherited from ThePEG::Base | |
static void | Init () |
The standard Init function used to initialize the interfaces. | |
Private Attributes | |
Store tensor coefficients. | |
Complex | _a00 |
Coefficient of \(g^{\mu\nu}\). | |
Complex | _a11 |
Coefficient of \(p_1^\mu p_1^\nu\). | |
Complex | _a12 |
Coefficient of \(p_1^\mu p_2^\nu\). | |
Complex | _a21 |
Coefficient of \(p_2^\mu p_1^\nu\). | |
Complex | _a22 |
Coefficient of \(p_2^\mu p_2^\nu\). | |
Complex | _aEp |
Coefficient of \(\epsilon^{\mu\nu\alpha\beta}p_1\alpha p_2\beta\). | |
Set and Get tensor coefficients. | |
Complex | a00 () const |
Access coefficient of \(g^{\mu\nu}\). | |
Complex | a11 () const |
Access coefficient of \(p_1^\mu p_1^\nu\). | |
Complex | a12 () const |
Access coefficient of \(p_1^\mu p_2^\nu\). | |
Complex | a21 () const |
Access coefficient of \(p_2^\mu p_1^\nu\). | |
Complex | a22 () const |
Access coefficient of \(p_2^\mu p_2^\nu\). | |
Complex | aEp () const |
Access coefficient of \(\epsilon^{\mu\nu\alpha\beta}p_1\alpha p_2\beta\). | |
void | a00 (const Complex &val) |
Set tensor coefficient of \(g^{\mu\nu}\). | |
void | a11 (const Complex &val) |
Set tensor coefficient of \(p_1^\mu p_1^\nu\). | |
void | a12 (const Complex &val) |
Set tensor coefficient of \(p_1^\mu p_2^\nu\). | |
void | a21 (const Complex &val) |
Set tensor coefficient of \(p_2^\mu p_1^\nu\). | |
void | a22 (const Complex &val) |
Set tensor coefficient of \(p_2^\mu p_2^\nu\). | |
void | aEp (const Complex &val) |
Set tensor coefficient of \(\epsilon^{\mu\nu\alpha\beta}p_1\alpha p_2\beta\). | |
GeneralVVSVertex & | operator= (const GeneralVVSVertex &)=delete |
The assignment operator is private and must never be called. | |
Additional Inherited Members | |
Public Types inherited from ThePEG::InterfacedBase | |
enum | InitState { initializing = -1 , uninitialized = 0 , initialized = 1 , runready = 2 } |
Enumeration reflecting the state of an InterfacedBase object. More... | |
Public Types inherited from ThePEG::Pointer::ReferenceCounted | |
typedef unsigned int | CounterType |
The integer type used for counting. | |
Public Attributes inherited from ThePEG::Pointer::ReferenceCounted | |
const unsigned long | uniqueId |
The unique ID. | |
Protected Member Functions inherited from ThePEG::Helicity::VertexBase | |
virtual void | doinit () |
Initialize this object after the setup phase before saving an EventGenerator to disk. | |
virtual void | rebind (const TranslationMap &trans) |
Rebind pointer to other Interfaced objects. | |
virtual IVector | getReferences () |
Return a vector of all pointers to Interfaced objects used in this object. | |
void | addToList (const vector< long > &ids) |
Members to set-up the particles. | |
void | addToList (long ida, long idb, long idc, long idd=0) |
Set up the lists of outer particles for the three-/four-point vertex. | |
void | norm (const Complex &coup) |
Members for the amplitude calculations. | |
virtual Complex | propagator (int iopt, Energy2 q2, tcPDPtr part, complex< Energy > mass=-GeV, complex< Energy > width=-GeV) |
Calculate the propagator for a diagram. | |
Complex | normPropagator (int iopt, Energy2 q2, tcPDPtr part, complex< Energy > mass=-GeV, complex< Energy > width=-GeV) |
Calculate propagator multiplied by coupling. | |
void | orderInGem (int order) |
Set the order in \(g_EM\). | |
void | orderInGs (int order) |
Set the order in \(g_s\). | |
void | orderInCoupling (CouplingType::T cType, int order) |
Set the order in a specifc type of coupling. | |
void | colourStructure (ColourStructure::T structure) |
Set the colour structure. | |
Protected Member Functions inherited from ThePEG::Interfaced | |
void | reporeg (IBPtr object, string name) const |
Register the given object in the Repository with the given name in a subdirectory with the same name as this object. | |
template<typename PtrT > | |
bool | setDefaultReference (PtrT &ptr, string classname, string objectname) |
If the pointer, ptr, to an object is not set, create an object of class classname and register it with the Repository with the given objectname in a sib-directory with the same name as this object. | |
Interfaced () | |
Protected default constructor. | |
Interfaced (const string &newName) | |
Protected constructor taking a name as argument. | |
Interfaced (const Interfaced &i) | |
Protected copy-constructor. | |
void | setGenerator (tEGPtr generator) |
Protected function to reset the generator pointer, required for automatic decayer generation in Herwig++ BSM models. | |
Protected Member Functions inherited from ThePEG::InterfacedBase | |
virtual void | readSetup (istream &is) |
Read setup info from a standard istream is. | |
virtual void | doupdate () |
Check sanity of the object during the setup phase. | |
virtual void | doinitrun () |
Initialize this object. | |
virtual void | dofinish () |
Finalize this object. | |
virtual IBPtr | clone () const =0 |
Return a simple clone of this object. | |
InterfacedBase () | |
Protected default constructor. | |
InterfacedBase (string newName) | |
Protected constructor with the name given as argument. | |
InterfacedBase (const InterfacedBase &i) | |
Protected copy-constructor. | |
Protected Member Functions inherited from ThePEG::Pointer::ReferenceCounted | |
ReferenceCounted () | |
Default constructor. | |
ReferenceCounted (const ReferenceCounted &) | |
Copy-constructor. | |
ReferenceCounted & | operator= (const ReferenceCounted &) |
Assignment. | |
Protected Member Functions inherited from ThePEG::Named | |
const Named & | operator= (const Named &other) |
Assignment. | |
const string & | name (const string &newName) |
Set new name. | |
Static Protected Member Functions inherited from ThePEG::Interfaced | |
static void | registerRepository (IBPtr) |
Register an Interfaced object with the Repository. | |
static void | registerRepository (IBPtr, string newName) |
Register an Interfaced object with the Repository, giving it a name. | |
The GeneralVVSVertex class implements a general Vector-Vector-Scalar vertex allowing for decay modes that only enter at the one-loop level.
The loop integral is calculated by Passarino-Veltman reduction and the coefficients are stored here. They must be calculated in the inheriting class along with implementation of the setCoupling member.
The vertex takes the form
\[ a_{00}g^{\mu\nu}p_1\cdot p_2 + a_{11}p_1^\mu p_1^\nu + a_{12}p_1^\mu p_2^\nu + a_{21}p_2^\mu p_1^\nu + a_{22}p_2^\mu p_2^\nu +a_e\epsilon^{p_1 \mu \nu p_2}\]
Definition at line 34 of file GeneralVVSVertex.h.
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inline |
The default constructor.
Definition at line 41 of file GeneralVVSVertex.h.
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inline |
Access coefficient of \(g^{\mu\nu}\).
Definition at line 141 of file GeneralVVSVertex.h.
References _a00.
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inline |
Set tensor coefficient of \(g^{\mu\nu}\).
Definition at line 171 of file GeneralVVSVertex.h.
References _a00.
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inline |
Access coefficient of \(p_1^\mu p_1^\nu\).
Definition at line 146 of file GeneralVVSVertex.h.
References _a11.
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inline |
Set tensor coefficient of \(p_1^\mu p_1^\nu\).
Definition at line 176 of file GeneralVVSVertex.h.
References _a11.
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inline |
Access coefficient of \(p_1^\mu p_2^\nu\).
Definition at line 151 of file GeneralVVSVertex.h.
References _a12.
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inline |
Set tensor coefficient of \(p_1^\mu p_2^\nu\).
Definition at line 181 of file GeneralVVSVertex.h.
References _a12.
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inline |
Access coefficient of \(p_2^\mu p_1^\nu\).
Definition at line 156 of file GeneralVVSVertex.h.
References _a21.
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inline |
Set tensor coefficient of \(p_2^\mu p_1^\nu\).
Definition at line 186 of file GeneralVVSVertex.h.
References _a21.
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inline |
Access coefficient of \(p_2^\mu p_2^\nu\).
Definition at line 161 of file GeneralVVSVertex.h.
References _a22.
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inline |
Set tensor coefficient of \(p_2^\mu p_2^\nu\).
Definition at line 191 of file GeneralVVSVertex.h.
References _a22.
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inline |
Access coefficient of \(\epsilon^{\mu\nu\alpha\beta}p_1\alpha p_2\beta\).
Definition at line 166 of file GeneralVVSVertex.h.
References _aEp.
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inline |
Set tensor coefficient of \(\epsilon^{\mu\nu\alpha\beta}p_1\alpha p_2\beta\).
Definition at line 196 of file GeneralVVSVertex.h.
References _aEp.
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virtual |
Members to calculate the helicity amplitude expressions for vertices and off-shell particles.
Evaluate the vertex.
q2 | The scale \(q^2\) for the coupling at the vertex. |
vec1 | The wavefunction for the first vector. |
vec2 | The wavefunction for the second vector. |
sca3 | The wavefunction for the scalar. |
Implements ThePEG::Helicity::AbstractVVSVertex.
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virtual |
Evaluate the off-shell scalar coming from the vertex.
q2 | The scale \(q^2\) for the coupling at the vertex. |
iopt | Option of the shape of the Breit-Wigner for the off-shell scalar. |
out | The ParticleData pointer for the off-shell scalar. |
vec1 | The wavefunction for the first vector. |
vec2 | The wavefunction for the second vector. |
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::AbstractVVSVertex.
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virtual |
Evaluate the off-shell vector coming from the vertex.
q2 | The scale \(q^2\) for the coupling at the vertex. |
iopt | Option of the shape of the Breit-Wigner for the off-shell vector. |
out | The ParticleData pointer for the off-shell vector. |
vec2 | The wavefunction for the vector. |
sca3 | The wavefunction for the scalar. |
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::AbstractVVSVertex.
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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.
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privatedelete |
The assignment operator is private and must never be called.
In fact, it should not even be implemented.
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pure virtual |
Set coupling methods.
Calculate the couplings for a three point interaction. This method is virtual and must be implemented in classes inheriting from this.
q2 | The scale \(q^2\) for the coupling at the vertex. |
part1 | The ParticleData pointer for the first particle. |
part2 | The ParticleData pointer for the second particle. |
part3 | The ParticleData pointer for the third particle. |
Implements ThePEG::Helicity::VertexBase.
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inlinevirtual |
Dummy setCouplings for a four point interaction This method is virtual and must be implemented in classes inheriting from this.
Implements ThePEG::Helicity::VertexBase.
Definition at line 129 of file GeneralVVSVertex.h.
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private |
Coefficient of \(g^{\mu\nu}\).
Definition at line 215 of file GeneralVVSVertex.h.
Referenced by a00().
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private |
Coefficient of \(p_1^\mu p_1^\nu\).
Definition at line 220 of file GeneralVVSVertex.h.
Referenced by a11().
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private |
Coefficient of \(p_1^\mu p_2^\nu\).
Definition at line 225 of file GeneralVVSVertex.h.
Referenced by a12().
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private |
Coefficient of \(p_2^\mu p_1^\nu\).
Definition at line 230 of file GeneralVVSVertex.h.
Referenced by a21().
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private |
Coefficient of \(p_2^\mu p_2^\nu\).
Definition at line 235 of file GeneralVVSVertex.h.
Referenced by a22().
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private |
Coefficient of \(\epsilon^{\mu\nu\alpha\beta}p_1\alpha p_2\beta\).
Definition at line 240 of file GeneralVVSVertex.h.
Referenced by aEp().