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matchbox::alpha_s Class Referenceabstract

Base class for the strong coupling. More...

#include <alpha_s.h>

Inheritance diagram for matchbox::alpha_s:

Public Member Functions

double operator() (Energy2 scale) const
 return alpha_s as function of scale
 
virtual double operator() (Energy2 scale, Energy2 lambda2, unsigned int nf) const =0
 return alpha_s as function of scale, QCD scale and number of active flavours
 
string check (string args)
 match thresholds and write alpha_s to specified file; arguments are Q_low/GeV Q_high/GeV n_steps filename
 
unsigned int min_active_flavours () const
 return minimum number of active flavours
 
void min_active_flavours (unsigned int nf)
 set minimum number of active flavours
 
unsigned int max_active_flavours () const
 return maximum number of active flavours
 
void max_active_flavours (unsigned int nf)
 set maximum number of active flavours
 
unsigned int active_flavours (Energy2 scale) const
 return the number of active flavours at the given scale
 
Energy2 lambda_squared (unsigned int f) const
 return the lambda squared for the given number of flavours
 
Energy2 quark_mass_squared (unsigned int f) const
 return the mass squared for given flavour
 
void quark_mass_squared (unsigned int f, Energy2 m2)
 set the mass squared for given flavour
 
void match_thresholds ()
 perform the threshold matching given alpha_s value at reference scale
 
bool matched () const
 return true, if threshold matching has been performed
 
Standard constructors and destructors.
 alpha_s ()
 The default constructor.
 
virtual ~alpha_s ()
 The destructor.
 
Virtual functions as required by AlphaSBase.
virtual double value (Energy2 scale, const StandardModelBase &) const
 The $\alpha_S$. More...
 
virtual vector< Energy2 > flavourThresholds () const
 Return the flavour thresholds used. More...
 
virtual vector< Energy > LambdaQCDs () const
 Return the $\Lambda_{QCD}$ used for different numbers of active flavours.
 
os the persistent output stream written to.

Function used to write out object persistently.

void persistentOutput (PersistentOStream &os) const
 
version the version number of the object when written.
void persistentInput (PersistentIStream &is, int version)
 
- Public Member Functions inherited from ThePEG::AlphaSBase
const vector< Energy > & quarkMasses () const
 
unsigned int Nf (Energy2 scale) const
 
Energy LambdaQCD (unsigned int nflav) const
 
Energy LambdaQCD (Energy2 scale) const
 
void persistentOutput (PersistentOStream &os) const
 
void persistentInput (PersistentIStream &is, int version)
 
unsigned int Nf (Energy2 scale) const
 
Energy LambdaQCD (unsigned int nflav) const
 
Energy LambdaQCD (Energy2 scale) const
 
void persistentOutput (PersistentOStream &os) const
 
void persistentInput (PersistentIStream &is, int version)
 
- Public Member Functions inherited from ThePEG::RunningCoupling
double value (Energy2 scale) const
 
virtual double overestimateValue (Energy2 scale) const
 
virtual double ratioToOverestimate (Energy2) const
 
double scaleFactor () const
 
virtual unsigned int nloops () const
 
void persistentOutput (PersistentOStream &os) const
 
void persistentInput (PersistentIStream &is, int version)
 
virtual unsigned int nloops () const
 
void persistentOutput (PersistentOStream &os) const
 
void persistentInput (PersistentIStream &is, int version)
 
- Public Member Functions inherited from ThePEG::Interfaced
virtual bool defaultInit ()
 
PPtr getParticle (PID) const
 
PDPtr getParticleData (PID) const
 
bool used () const
 
void useMe () const
 
tEGPtr generator () const
 
void persistentOutput (PersistentOStream &os) const
 
void persistentInput (PersistentIStream &is, int version)
 
PPtr getParticle (PID) const
 
PDPtr getParticleData (PID) const
 
bool used () const
 
void useMe () const
 
tEGPtr generator () const
 
void persistentOutput (PersistentOStream &os) const
 
void persistentInput (PersistentIStream &is, int version)
 
- Public Member Functions inherited from ThePEG::InterfacedBase
string fullName () const
 
string name () const
 
string path () const
 
string comment () const
 
void setup (istream &is)
 
virtual IBPtr fullclone () const
 
virtual void debugme () const
 
void update ()
 
void init ()
 
virtual bool preInitialize () const
 
void initrun ()
 
void finish ()
 
void touch ()
 
void reset ()
 
void clear ()
 
InitState state () const
 
bool locked () const
 
bool touched () const
 
void persistentOutput (PersistentOStream &os) const
 
void persistentInput (PersistentIStream &is, int version)
 
void update ()
 
void init ()
 
virtual bool preInitialize () const
 
void initrun ()
 
void finish ()
 
void touch ()
 
void reset ()
 
void clear ()
 
InitState state () const
 
bool locked () const
 
bool touched () const
 
void persistentOutput (PersistentOStream &os) const
 
void persistentInput (PersistentIStream &is, int version)
 
- Public Member Functions inherited from ThePEG::Base
void debug () const
 
- Public Member Functions inherited from ThePEG::Pointer::ReferenceCounted
CounterType referenceCount () const
 
- Public Member Functions inherited from ThePEG::Named
 Named (const string &newName=string())
 
 Named (const Named &)=default
 
const string & name () const
 
bool operator== (const Named &other) const
 
bool operator< (const Named &other) const
 

Static Public Member Functions

static void Init ()
 The standard Init function used to initialize the interfaces. More...
 
- Static Public Member Functions inherited from ThePEG::AlphaSBase
static void Init ()
 
- Static Public Member Functions inherited from ThePEG::RunningCoupling
static void Init ()
 
- Static Public Member Functions inherited from ThePEG::Interfaced
static void Init ()
 
- Static Public Member Functions inherited from ThePEG::InterfacedBase
static void Init ()
 
- Static Public Member Functions inherited from ThePEG::Base
static void Init ()
 

Protected Member Functions

double scale_factor () const
 return the scale factor
 
Standard Interfaced functions.
virtual void doinit ()
 Initialize this object after the setup phase before saving an EventGenerator to disk. More...
 
- Protected Member Functions inherited from ThePEG::Interfaced
void reporeg (IBPtr object, string name) const
 
bool setDefaultReference (PtrT &ptr, string classname, string objectname)
 
 Interfaced (const string &newName)
 
 Interfaced (const Interfaced &i)
 
void setGenerator (tEGPtr generator)
 
- Protected Member Functions inherited from ThePEG::InterfacedBase
virtual IBPtr clone () const=0
 
 InterfacedBase (string newName)
 
 InterfacedBase (const InterfacedBase &i)
 
virtual void readSetup (istream &is)
 
virtual void doupdate ()
 
virtual void doinitrun ()
 
virtual void dofinish ()
 
virtual IVector getReferences ()
 
virtual void rebind (const TranslationMap &)
 
virtual void readSetup (istream &is)
 
virtual void doupdate ()
 
virtual void doinitrun ()
 
virtual void dofinish ()
 
virtual IVector getReferences ()
 
virtual void rebind (const TranslationMap &)
 
- Protected Member Functions inherited from ThePEG::Pointer::ReferenceCounted
 ReferenceCounted (const ReferenceCounted &)
 
ReferenceCountedoperator= (const ReferenceCounted &)
 
 ReferenceCounted (const ReferenceCounted &)
 
ReferenceCountedoperator= (const ReferenceCounted &)
 
- Protected Member Functions inherited from ThePEG::Named
const Namedoperator= (const Named &other)
 
const string & name (const string &newName)
 

Private Member Functions

alpha_soperator= (const alpha_s &)=delete
 The assignment operator is private and must never be called. More...
 

Private Attributes

unsigned int min_active_flavours_
 
unsigned int max_active_flavours_
 
bool matched_
 
double scale_factor_
 
std::array< Energy2, 7 > quark_masses_squared_
 
std::array< Energy2, 7 > lambda_squared_
 
vector< Energy2 > nfvector =vector<Energy2>(6)
 
double alpha_s_in_
 
Energy scale_in_
 
pair< Energy2, Energy2 > lambda_range_
 
bool fixed_
 

Static Private Attributes

static AbstractClassDescription< alpha_sinitalpha_s
 The static object used to initialize the description of this class. More...
 

Additional Inherited Members

- Public Types inherited from ThePEG::InterfacedBase
enum  InitState
 
- Public Types inherited from ThePEG::Pointer::ReferenceCounted
typedef unsigned int CounterType
 
- Public Attributes inherited from ThePEG::InterfacedBase
 initializing
 
 uninitialized
 
 initialized
 
 runready
 
- Public Attributes inherited from ThePEG::Pointer::ReferenceCounted
const unsigned long uniqueId
 
- Static Protected Member Functions inherited from ThePEG::Interfaced
static void registerRepository (IBPtr)
 
static void registerRepository (IBPtr, string newName)
 

Detailed Description

Base class for the strong coupling.

See also
The interfaces defined for alpha_s.

Definition at line 96 of file alpha_s.h.

Member Function Documentation

◆ doinit()

virtual void matchbox::alpha_s::doinit ( )
inlineprotectedvirtual

Initialize this object after the setup phase before saving an EventGenerator to disk.

Exceptions
InitExceptionif object could not be initialized properly.

Reimplemented from ThePEG::AlphaSBase.

Reimplemented in matchbox::lo_alpha_s, and matchbox::nlo_alpha_s.

Definition at line 241 of file alpha_s.h.

References ThePEG::AlphaSBase::doinit().

Referenced by matchbox::lo_alpha_s::doinit(), and matchbox::nlo_alpha_s::doinit().

◆ flavourThresholds()

virtual vector<Energy2> matchbox::alpha_s::flavourThresholds ( ) const
inlinevirtual

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.

Definition at line 131 of file alpha_s.h.

◆ Init()

static void matchbox::alpha_s::Init ( )
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.

◆ operator=()

alpha_s& matchbox::alpha_s::operator= ( const alpha_s )
privatedelete

The assignment operator is private and must never be called.

In fact, it should not even be implemented.

◆ value()

virtual double matchbox::alpha_s::value ( Energy2  scale,
const StandardModelBase  
) const
inlinevirtual

The $\alpha_S$.

Return the QCD coupling for a given scale using the given standard model object sm.

Implements ThePEG::RunningCoupling.

Definition at line 122 of file alpha_s.h.

Member Data Documentation

◆ initalpha_s

AbstractClassDescription<alpha_s> matchbox::alpha_s::initalpha_s
staticprivate

The static object used to initialize the description of this class.

Indicates that this is an abstract class with persistent data.

Definition at line 285 of file alpha_s.h.


The documentation for this class was generated from the following file: