ThePEG
2.2.1
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ParticleData inherits from InterfacedBase and represents the properties of a particle type. More...
#include <ParticleData.h>
Public Types | |
typedef Selector< tDMPtr > | DecaySelector |
A selector of DecayMode objects. More... | |
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 Member Functions | |
Energy | mass (Energy) |
Set the nominal mass. | |
Energy | mass () const |
Return the nominal mass. | |
Energy | hardProcessMass () const |
Return the mass to be used when evaluating hard process cross sections. | |
Energy | massMax () const |
Return the maximum possible mass of this particle type. | |
Energy | massMin () const |
Return the minimum possible mass of this particle type. | |
virtual Energy | constituentMass () const |
Return the constituent mass of this particle if relevant. More... | |
Energy | width (Energy) |
Set the width. | |
Energy | width () const |
Get the width. More... | |
Energy | widthCut (Energy wci) |
Set the width cut. More... | |
Energy | widthCut () const |
Get the width cut. | |
Energy | widthUpCut (Energy) |
Set the upper width cut. | |
Energy | widthUpCut () const |
Get the upper width cut. | |
Energy | widthLoCut (Energy) |
Set the lower width cut. | |
Energy | widthLoCut () const |
Get the lower width cut. | |
Length | cTau (Length) |
Set the life time cTau. | |
Length | cTau () const |
Get the life time cTau cTau. More... | |
Energy | hardProcessWidth () const |
Return the width to be used when evaluating hard process cross sections. | |
PDT::Charge | iCharge (PDT::Charge) |
Set the charge. More... | |
Charge | charge () const |
Get the charge. More... | |
PDT::Charge | iCharge () const |
Get the charge. More... | |
bool | charged () const |
Return true if charged. | |
bool | positive () const |
Return true if positively charged. | |
bool | negative () const |
Return true if negatively charged. | |
PDT::Spin | iSpin (PDT::Spin) |
Set the spin. More... | |
AngularMomentum | spin () const |
Get the spin.The spin is returned in standard units. | |
PDT::Spin | iSpin () const |
Get the spin. More... | |
PDT::Colour | iColour (PDT::Colour) |
Set the colour of the particle in units of PDT::Colour. | |
PDT::Colour | iColour () const |
Get the colour of the particle in units of PDT::Colour. | |
bool | coloured () const |
Return true if coloured. | |
bool | hasColour (bool anti=false) const |
Return true if (anti) coloured or colour-octet. | |
bool | hasAntiColour () const |
Return true if anti coloured or colour-octet. | |
void | stable (bool stab) |
Specify if particle is to be considered stable according to stab. | |
bool | stable () const |
Return true if particle is to be considered stable. More... | |
tPDPtr | CC () const |
Get the pointer to the corresponding anti partner. | |
void | synchronized (bool sync) |
Specify if the anti partner chould be changed automatically when this object is changed according to sync. | |
bool | synchronized () const |
Return true if the anti partner chould be changed automatically when this object is changed. | |
void | synchronize () |
If there is an anti-partner, update this object to have correct anti-properties. | |
void | massGenerator (tMassGenPtr) |
Set the mass generator object. | |
tMassGenPtr | massGenerator () const |
Get the mass generator object. | |
void | widthGenerator (tWidthGeneratorPtr) |
Set the width generator object. | |
tWidthGeneratorPtr | widthGenerator () const |
Get the width generator object. | |
void | variableRatio (bool varRatio) |
Specify if the branching ratio of the Particle instances should vary with their masses. | |
bool | variableRatio () const |
Return true if the branching ratio should vary with the mass of the Particle instance. | |
Standard constructors and destructors. | |
ParticleData () | |
Default constructor. | |
virtual | ~ParticleData () |
Destructor. | |
Acces to number and name. | |
long | id () const |
Return the PDG id number. | |
const string & | PDGName () const |
Return the generic PDG name. More... | |
const string & | genericName () const |
Return the generic PDG name. More... | |
Functions used for producing Particle instances. | |
PPtr | produceParticle (const Lorentz5Momentum &) const |
Produce a particle specifying momentum. | |
PPtr | produceParticle (const LorentzMomentum &) const |
Produce a particle specifying momentum. | |
PPtr | produceParticle (const LorentzMomentum &, Energy m) const |
Produce a particle specifying 4-momentum and a mass. | |
PPtr | produceParticle (const Momentum3 &pp=Momentum3()) const |
Produce a particle specifying 3-momentum. | |
PPtr | produceParticle (Energy m, const Momentum3 &pp=Momentum3()) const |
Produce a particle specifying mass and 3-momentum. | |
PPtr | produceParticle (Energy plus, Energy minus, Energy px, Energy py) const |
Produce a particle specifying light-cone momentum components and transverse momentum components. | |
Energy | generateMass () const |
Generate a mass for an instance of this particle type. | |
Energy | generateWidth (Energy mass) const |
Generate a width for an instance of this particle type. More... | |
Length | generateLifeTime (Energy mass, Energy width) const |
Generate a mass for an instance of this particle type. More... | |
Access the decay modes. | |
const DecaySelector & | decaySelector () const |
Return the nominal decay selector for this particle. More... | |
tDMPtr | selectMode (Particle &p) const |
Selects a decay mode randomly according to the branching ratios. More... | |
const DecaySet & | decayModes () const |
Access all the decay modes, including those which are switched off, or have zero branching ratio. | |
Functions used by the persistent I/O system. | |
void | persistentOutput (PersistentOStream &os) const |
Function used to write out object persistently. More... | |
void | persistentInput (PersistentIStream &is, int version) |
Function used to read in object persistently. More... | |
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. More... | |
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. More... | |
void | persistentOutput (PersistentOStream &os) const |
Function used to write out object persistently. More... | |
void | persistentInput (PersistentIStream &is, int version) |
Function used to read in object persistently. More... | |
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. More... | |
string | name () const |
Returns the name of this object, without the path. | |
string | path () const |
Returns the path to this object including the trailing '/'. More... | |
string | comment () const |
Returns a comment assigned to this object. | |
void | setup (istream &is) |
Read setup info from a standard istream is. More... | |
virtual void | debugme () const |
Print out debugging information for this object on std::cerr. More... | |
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). More... | |
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(). | |
void | persistentOutput (PersistentOStream &os) const |
Function used to write out object persistently. More... | |
void | persistentInput (PersistentIStream &is, int version) |
Function used to read in object persistently. More... | |
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. More... | |
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 Create methods are special interfaces for ParticleData | |
classes. | |
static PDPtr | Create (PID newId, const string &newPDGName) |
Create a Particle which is its own anti-particle. | |
static PDPair | Create (PID newId, const string &newPDGName, const string &newAntiPDGName) |
Create a particle - anti particle pair. | |
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. More... | |
Protected Member Functions | |
virtual PDPtr | pdclone () const |
Special clone function used by the Repository. More... | |
ParticleData (PID newId, const string &newPDGName) | |
Protected constructor only to be used by subclasses or by the Create method. | |
virtual void | readSetup (istream &is) |
Read setup info from a standard stream. More... | |
void | addDecayMode (tDMPtr) |
Add a decay mode for this particle. | |
void | removeDecayMode (tDMPtr) |
Remove a decay mode for this particle. | |
Clone Methods. | |
virtual IBPtr | clone () const |
Make a simple clone of this object. More... | |
virtual IBPtr | fullclone () const |
Make a clone of this object, possibly modifying the cloned object to make it sane. More... | |
Standard Interfaced functions. | |
virtual void | doupdate () |
Check sanity of the object during the setup phase. | |
virtual void | doinit () |
Initialize this object after the setup phase before saving an EventGenerator to disk. More... | |
virtual void | rebind (const TranslationMap &trans) |
Rebind pointer to other Interfaced objects. More... | |
virtual IVector | getReferences () |
Return a vector of all pointers to Interfaced objects used in this object. More... | |
virtual void | doinitrun () |
Initialize this object. More... | |
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. More... | |
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 | |
InterfacedBase () | |
Protected default constructor. | |
InterfacedBase (string newName) | |
Protected constructor with the name given as argument. | |
InterfacedBase (const InterfacedBase &i) | |
Protected copy-constructor. | |
virtual void | dofinish () |
Finalize this object. More... | |
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 | |
static void | antiSetup (const PDPair &pap) |
Used by subclasses or by the Create method to setup anti-relationship. | |
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. | |
Private Member Functions | |
void | setMass (Energy) |
Utility function for the interface. | |
void | setHardProcessMass (Energy) |
Utility function for the interface. | |
string | doUnsetHardProcessMass (string) |
Reset the hard process mass. | |
string | doAdjustNominalMass (string) |
Adjust the nominal mass to the hard process mass if a reshuffling is not desirable. | |
Energy | defMass () const |
Utility function for the interface. | |
void | setWidth (Energy) |
Utility function for the interface. | |
void | setHardProcessWidth (Energy) |
Utility function for the interface. | |
string | doUnsetHardProcessWidth (string) |
Reset the hard process mass. | |
Energy | getWidth () const |
Utility function for the interface. | |
Energy | defWidth () const |
Utility function for the interface. | |
void | setCut (Energy) |
Utility function for the interface. | |
Energy | getCut () const |
Utility function for the interface. | |
Energy | defCut () const |
Utility function for the interface. | |
void | setUpCut (Energy) |
Utility function for the interface. | |
Energy | getUpCut () const |
Utility function for the interface. | |
void | setLoCut (Energy) |
Utility function for the interface. | |
Energy | getLoCut () const |
Utility function for the interface. | |
void | setCTau (Length) |
Utility function for the interface. | |
Length | getCTau () const |
Utility function for the interface. | |
Length | defCTau () const |
Utility function for the interface. | |
void | setStable (long) |
Utility function for the interface. | |
long | getStable () const |
Utility function for the interface. | |
void | setSync (long) |
Utility function for the interface. | |
long | getSync () const |
Utility function for the interface. | |
void | setVariableRatio (long) |
Utility function for the interface. | |
long | getVariableRatio () const |
Utility function for the interface. | |
string | doSync (string) |
Utility function for the interface. | |
void | setMassGenerator (MassGenPtr) |
Utility function for the interface. | |
void | setWidthGenerator (WidthGeneratorPtr) |
Utility function for the interface. | |
void | setCharge (int) |
Utility function for the interface. | |
string | ssetCharge (string) |
Utility function for the interface. | |
int | getCharge () const |
Utility function for the interface. | |
int | defCharge () const |
Utility function for the interface. | |
void | setSpin (int) |
Utility function for the interface. | |
int | getSpin () const |
Utility function for the interface. | |
int | defSpin () const |
Utility function for the interface. | |
void | setColour (long) |
Utility function for the interface. | |
long | getColour () const |
Utility function for the interface. | |
long | defColour () const |
Utility function for the interface. | |
void | insDecayModes (DMPtr dm, int) |
Utility function for the interface. | |
void | delDecayModes (int i) |
Utility function for the interface. | |
vector< DMPtr > | getDecayModes () const |
Utility function for the interface. | |
string | doSelectDecayModes (string) |
Utility function for the interface. | |
string | doPrintDecayModes (string) |
Utility function for the interface. | |
Private Attributes | |
PID | theId |
Id number according to the STDHEP/PDG standard. | |
string | thePDGName |
Name and Id number according to the STDHEP/PDG standard. | |
Energy | theMass |
Nominal mass. | |
Energy | theWidth |
Width. | |
Energy | theHardProcessMass |
The mass to be used when evaluating hard process cross sections. | |
bool | hardProcessMassSet |
True, if a hard process mass has been set. | |
Energy | theHardProcessWidth |
The width to be used when evaluating hard process cross sections. | |
bool | hardProcessWidthSet |
True, if a hard process width has been set. | |
Energy | theWidthUpCut |
Upper width cut. | |
Energy | theWidthLoCut |
Lower width cut. | |
Length | theCTau |
Lifetime. | |
PDT::Charge | theCharge |
Three times the charge. | |
PDT::Spin | theSpin |
2 times the spin plus one. | |
PDT::Colour | theColour |
The colour for this particle. | |
MassGenPtr | theMassGenerator |
A pointer to an object capable to generate a mass for a particle of this type. | |
bool | isStable |
True if the particle is considered stable. | |
DecaySelector | theDecaySelector |
A selector of decay modes weighted by the nominal branching ratios. | |
DecaySet | theDecayModes |
The set of all decay modes. | |
WidthGeneratorPtr | theWidthGenerator |
A pointer to an object capable to generate the branching fractions for different decay modes for this particle type. More... | |
bool | theVariableRatio |
Determine whether the branching fractions are allowed to change on a particle-by-particle basis. | |
tPDPtr | theAntiPartner |
Pointer to the object corresponding to the antiparticle. More... | |
bool | syncAnti |
If syncAnti is true all changes to this object will be transfered to the antiParticle. | |
Energy | theDefMass |
Helper variable to keep track of the default mass. | |
Energy | theDefWidth |
Helper variable to keep track of the default width. | |
Energy | theDefCut |
Helper variable to keep track of the default width cut. | |
Length | theDefCTau |
Helper variable to keep track of the default lifetime. | |
PDT::Charge | theDefCharge |
Helper variable to keep track of the default charge. | |
PDT::Spin | theDefSpin |
Helper variable to keep track of the default spin. | |
PDT::Colour | theDefColour |
Helper variable to keep track of the default colour. | |
Static Private Attributes | |
static ClassDescription< ParticleData > | initParticleData |
Describe a concrete class with persistent data. | |
Friends | |
class | Repository |
The Repository is a friend. More... | |
class | EventGenerator |
The EventGenerator is a friend. More... | |
class | DecayMode |
DecayMode is a friend. More... | |
Additional Inherited Members | |
Public Attributes inherited from ThePEG::Pointer::ReferenceCounted | |
const unsigned long | uniqueId |
The unique ID. More... | |
ParticleData inherits from InterfacedBase and represents the properties of a particle type.
It is also able to produce instances of this Particle type and, among other things, to decay them.
Definition at line 36 of file ParticleData.h.
A selector of DecayMode objects.
Definition at line 50 of file ParticleData.h.
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inline |
Get the charge.
The charge is returned in standard units and in iCharge the charge is returned in units of e/3.
Definition at line 301 of file ParticleData.h.
References theCharge.
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protectedvirtual |
Make a simple clone of this object.
Implements ThePEG::InterfacedBase.
Reimplemented in ThePEG::RemnantData.
Referenced by variableRatio().
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inlinevirtual |
Return the constituent mass of this particle if relevant.
This version simply returns the nominal mass.
Reimplemented in ThePEG::ConstituentParticleData.
Definition at line 212 of file ParticleData.h.
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inline |
Get the life time cTau cTau.
If no life time is specified, it is calculated from the width. If the width is also not specified, the lifetime is assumed to be zero for ustable particles and infinite for stable ones.
Definition at line 277 of file ParticleData.h.
References ThePEG::Units::hbarc, ThePEG::Constants::MaxLength, stable(), theCTau, theWidth, and ThePEG::ZERO.
Referenced by widthLoCut().
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inline |
Return the nominal decay selector for this particle.
Ie. the decay modes weighted by their nominal branching ratios.
Definition at line 163 of file ParticleData.h.
References selectMode(), and theDecaySelector.
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protectedvirtual |
Initialize this object after the setup phase before saving an EventGenerator to disk.
InitException | if object could not be initialized properly. |
Reimplemented from ThePEG::InterfacedBase.
Reimplemented in ThePEG::MixedParticleData.
Referenced by variableRatio().
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protectedvirtual |
Initialize this object.
Called in the run phase just before a run begins.
Reimplemented from ThePEG::InterfacedBase.
Referenced by variableRatio().
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protectedvirtual |
Make a clone of this object, possibly modifying the cloned object to make it sane.
Reimplemented from ThePEG::InterfacedBase.
Reimplemented in ThePEG::RemnantData.
Referenced by variableRatio().
Generate a mass for an instance of this particle type.
Given a mass and a width of an instance of this particle type, generate a life time.
Referenced by genericName().
Generate a width for an instance of this particle type.
Given a mass of an instance of this particle type, calculate its width.
Referenced by genericName().
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inline |
Return the generic PDG name.
Note that this is not really standardised.
Definition at line 100 of file ParticleData.h.
References generateLifeTime(), generateMass(), generateWidth(), mass(), produceParticle(), thePDGName, and width().
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protectedvirtual |
Return a vector of all pointers to Interfaced objects used in this object.
Reimplemented from ThePEG::InterfacedBase.
Referenced by variableRatio().
PDT::Charge ThePEG::ParticleData::iCharge | ( | PDT::Charge | ) |
Set the charge.
The charge should be given in units of e/3 using the PDT::Charge enum.
Referenced by ThePEG::ChargedMatcher::Check(), ThePEG::PositiveMatcher::Check(), ThePEG::NeutralMatcher::Check(), and ThePEG::NegativeMatcher::Check().
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inline |
Get the charge.
The charge is returned in units of e/3.
Definition at line 306 of file ParticleData.h.
References theCharge.
Referenced by hardProcessWidth().
Set the spin.
The spin should be given as 2J+1 (in units of hbar/2) using the PDT::Spin enum.
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inline |
Get the spin.
The spin is returned as 2J+1 in units of hbar/2.
Definition at line 337 of file ParticleData.h.
References iColour(), and theSpin.
Referenced by negative().
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protectedvirtual |
Special clone function used by the Repository.
Also makes copies the decay modes and the anti-partner if it exists and if synchronized() is true.
Reimplemented in ThePEG::MixedParticleData, ThePEG::PolarizedBeamParticleData, ThePEG::ConstituentParticleData, and ThePEG::BeamParticleData.
Referenced by variableRatio().
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inline |
Return the generic PDG name.
Note that this is not really standardised.
Definition at line 94 of file ParticleData.h.
References thePDGName.
Referenced by ThePEG::Particle::PDGName().
void ThePEG::ParticleData::persistentInput | ( | PersistentIStream & | is, |
int | version | ||
) |
Function used to read in object persistently.
is | the persistent input stream read from. |
version | the version number of the object when written. |
Referenced by variableRatio().
void ThePEG::ParticleData::persistentOutput | ( | PersistentOStream & | os | ) | const |
Function used to write out object persistently.
os | the persistent output stream written to. |
Referenced by variableRatio().
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protectedvirtual |
Read setup info from a standard stream.
The following information must be supplied in a white-space separated list: PDG number, generic name, default mass (GeV), default width (GeV), width cut (GeV), the lifetime ctau (mm), the charge, the colour, the spin, stable (true) or not (false). Note that if a minus sign is given instead of a generic name, the name of the object will be used instead.
Reimplemented from ThePEG::InterfacedBase.
Reimplemented in ThePEG::ConstituentParticleData.
Referenced by variableRatio().
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protectedvirtual |
Rebind pointer to other Interfaced objects.
Called in the setup phase after all objects used in an EventGenerator has been cloned so that the pointers will refer to the cloned objects afterwards.
trans | a TranslationMap relating the original objects to their respective clones. |
RebindException | if no cloned object was found for a given pointer. |
Reimplemented from ThePEG::InterfacedBase.
Referenced by variableRatio().
Selects a decay mode randomly according to the branching ratios.
The nominal branching ratios may be changed for the particular Particle instance p, iether by an assigned WidthGenerator or the respective Decayers.
Referenced by decaySelector().
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inline |
Return true if particle is to be considered stable.
If the decay table is empty the function always returns true, even if the member variable is false.
Definition at line 382 of file ParticleData.h.
References isStable.
Referenced by cTau(), and hasAntiColour().
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inline |
Get the width.
If no width is specified, it is calculated from the lifetime.
Definition at line 223 of file ParticleData.h.
References ThePEG::Units::hbarc, ThePEG::Constants::MaxEnergy, theCTau, theWidth, and ThePEG::ZERO.
Referenced by constituentMass(), genericName(), and hardProcessWidth().
Set the width cut.
Both upper and lower cut is set.
Definition at line 232 of file ParticleData.h.
References widthLoCut(), and widthUpCut().
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friend |
DecayMode is a friend.
Definition at line 47 of file ParticleData.h.
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friend |
The EventGenerator is a friend.
Definition at line 44 of file ParticleData.h.
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friend |
The Repository is a friend.
Definition at line 41 of file ParticleData.h.
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private |
Pointer to the object corresponding to the antiparticle.
Set to null if it is its own antiparticle.
Definition at line 675 of file ParticleData.h.
Referenced by CC().
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private |
A pointer to an object capable to generate the branching fractions for different decay modes for this particle type.
The object will be asked to generate branching fractions every time the ParticleData object it updated and will modify the branching fractions for every particle instance if variableRatio is true.
Definition at line 663 of file ParticleData.h.
Referenced by widthGenerator().