ThePEG
1.8.0
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O1AlphaS inherits from AlphaSBase and implements the leading order running QCD coupling. More...
#include <O1AlphaS.h>
Public Member Functions | |
int | getMaxFlav () const |
Return the maximum number of active flavours. | |
Standard constructors and destructors. | |
O1AlphaS () | |
Default constructor. | |
Virtual functions mandated by the sub-class. | |
virtual double | value (Energy2 scale, const StandardModelBase &) const |
The ![]() | |
virtual unsigned int | nloops () const |
Return the number of loops contributing to the running this coupling. | |
virtual vector< Energy2 > | flavourThresholds () const |
Return the flavour thresholds used. | |
virtual vector< Energy > | LambdaQCDs () const |
Return the ![]() | |
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. | |
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unsigned int | Nf (Energy2 scale) const |
Return the number of avtive quark flavours. | |
Energy | LambdaQCD (unsigned int nflav) const |
Return the ![]() | |
Energy | LambdaQCD (Energy2 scale) const |
Return the ![]() | |
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RunningCoupling () | |
The default constructor. | |
double | value (Energy2 scale) const |
Return the value of the coupling at a given scale using the StandardModelBase object used by the EventGenerator. | |
virtual double | overestimateValue (Energy2 scale) const |
Return an overestimate to the running coupling at the given scale. | |
virtual double | ratioToOverestimate (Energy2) const |
Return the ratio of the exact to the overestimated value of the running coupling. | |
double | scaleFactor () const |
Return the scale factor, which may be used to globally rescale the argument of the running coupling. | |
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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 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 interface. |
Protected Member Functions | |
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. | |
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virtual void | doinit () |
Initialize this object after the setup phase before saving an EventGenerator to disk. |
Private Member Functions | |
O1AlphaS & | operator= (const O1AlphaS &) |
Private and non-existent assignment operator. |
Private Attributes | |
Energy | theLambdaQCD |
The ![]() | |
int | theLambdaFlavour |
The number of flavours for which theLambdaQCD is given. | |
int | theMaxFlav |
The maximum number of active flavours. | |
Energy | Q0 |
The scale below which ![]() |
Static Private Attributes | |
static ClassDescription< O1AlphaS > | initO1AlphaS |
Describe a concrete class with persistent data. |
O1AlphaS inherits from AlphaSBase and implements the leading order running QCD coupling.
The value is determined by a parameter at a given number of flavours. Optionally the coupling can be frozen under some minimum scale to avoid divergencies or negative couplings.
Definition at line 27 of file O1AlphaS.h.
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protectedvirtual |
Make a simple clone of this object.
Implements ThePEG::InterfacedBase.
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virtual |
Return the flavour thresholds used.
The returned vector contains (in position i
) the scales when the active number of flavours changes from i
to i+1
.
Implements ThePEG::AlphaSBase.
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protectedvirtual |
Make a clone of this object, possibly modifying the cloned object to make it sane.
Reimplemented from ThePEG::InterfacedBase.
void ThePEG::O1AlphaS::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. |
Reimplemented from ThePEG::AlphaSBase.
void ThePEG::O1AlphaS::persistentOutput | ( | PersistentOStream & | os | ) | const |
Function used to write out object persistently.
os | the persistent output stream written to. |
Reimplemented from ThePEG::AlphaSBase.
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virtual |
The .
Return the QCD coupling for a given scale using the given standard model object sm.
Implements ThePEG::RunningCoupling.
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private |
The for the number of flavours specified by theLambdaFlavour.
Other values for other numbers of active flavours are calculated from flavourThresholds() using a continuity requirement.
Definition at line 125 of file O1AlphaS.h.