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Herwig 7.3.0
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

 alpha_s ()
 The default constructor.
 
Virtual functions as required by AlphaSBase.
virtual double value (Energy2 scale, const StandardModelBase &) const
 The \(\alpha_S\).
 
virtual vector< Energy2 > flavourThresholds () const
 Return the flavour thresholds used.
 
virtual vector< Energy > LambdaQCDs () const
 Return the \(\Lambda_{QCD}\) used for different numbers of active flavours.
 
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
 
os the persistent output stream written to.

Function used to write out object persistently.

void persistentOutput (PersistentOStream &os) const
 
- Public Member Functions inherited from ThePEG::AlphaSBase
virtual vector< Energy2 > flavourThresholds () const=0
 
virtual vector< Energy > LambdaQCDs () const=0
 
unsigned int Nf (Energy2 scale) const
 
Energy LambdaQCD (unsigned int nflav) const
 
Energy LambdaQCD (Energy2 scale) const
 
const vector< Energy > & quarkMasses () const
 
virtual vector< Energy2 > flavourThresholds () const=0
 
virtual vector< Energy > LambdaQCDs () const=0
 
unsigned int Nf (Energy2 scale) const
 
Energy LambdaQCD (unsigned int nflav) const
 
Energy LambdaQCD (Energy2 scale) const
 
const vector< Energy > & quarkMasses () const
 
void persistentOutput (PersistentOStream &os) const
 
void persistentInput (PersistentIStream &is, int version)
 
- Public Member Functions inherited from ThePEG::RunningCoupling
virtual double value (Energy2 scale, const StandardModelBase &sm) const=0
 
virtual unsigned int nloops () const
 
double value (Energy2 scale) const
 
virtual double overestimateValue (Energy2 scale) const
 
virtual double ratioToOverestimate (Energy2) const
 
double scaleFactor () const
 
void persistentOutput (PersistentOStream &os) const
 
void persistentInput (PersistentIStream &is, int version)
 
virtual double value (Energy2 scale, const StandardModelBase &sm) const=0
 
virtual unsigned int nloops () const
 
double value (Energy2 scale) const
 
virtual double overestimateValue (Energy2 scale) const
 
virtual double ratioToOverestimate (Energy2) const
 
double scaleFactor () const
 
- 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
 
- Public Member Functions inherited from ThePEG::InterfacedBase
string fullName () const
 
string name () const
 
string path () const
 
string comment () const
 
void setup (istream &is)
 
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
 
virtual IBPtr fullclone () const
 
void persistentOutput (PersistentOStream &os) const
 
void persistentInput (PersistentIStream &is, int version)
 
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
 
virtual IBPtr fullclone () const
 
- Public Member Functions inherited from ThePEG::Base
void debug () const
 
virtual void debugme () 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
 

Protected Member Functions

Standard Interfaced functions.
virtual void doinit ()
 Initialize this object after the setup phase before saving an EventGenerator to disk.
 
double scale_factor () const
 return the scale factor
 
virtual void doinit ()
 
- 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 void readSetup (istream &is)
 
virtual void doupdate ()
 
virtual void doinit ()
 
virtual void doinitrun ()
 
virtual void dofinish ()
 
virtual IVector getReferences ()
 
virtual void rebind (const TranslationMap &)
 
virtual IBPtr clone () const=0
 
 InterfacedBase (string newName)
 
 InterfacedBase (const InterfacedBase &i)
 
virtual void readSetup (istream &is)
 
virtual void doupdate ()
 
virtual void doinit ()
 
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 &)
 
- Protected Member Functions inherited from ThePEG::Named
const Namedoperator= (const Named &other)
 
const string & name (const string &newName)
 

version the version number of the object when written.

static AbstractClassDescription< alpha_sinitalpha_s
 The static object used to initialize the description of this class.
 
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_
 
void persistentInput (PersistentIStream &is, int version)
 
static void Init ()
 The standard Init function used to initialize the interfaces.
 
alpha_soperator= (const alpha_s &)=delete
 The assignment operator is private and must never be called.
 

Additional Inherited Members

- Public Types inherited from ThePEG::InterfacedBase
enum  InitState
 
- Public Types inherited from ThePEG::Pointer::ReferenceCounted
typedef unsigned int CounterType
 
- 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 ()
 
- 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

◆ active_flavours()

unsigned int matchbox::alpha_s::active_flavours ( Energy2  scale) const
inline

return the number of active flavours at the given scale

Definition at line 180 of file alpha_s.h.

References quark_mass_squared().

Referenced by operator()().

◆ 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 233 of file alpha_s.h.

References ThePEG::AlphaSBase::doinit(), and match_thresholds().

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 123 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.

◆ lambda_squared()

Energy2 matchbox::alpha_s::lambda_squared ( unsigned int  f) const
inline

return the lambda squared for the given number of flavours

Definition at line 195 of file alpha_s.h.

◆ LambdaQCDs()

virtual vector< Energy > matchbox::alpha_s::LambdaQCDs ( ) const
inlinevirtual

Return the \(\Lambda_{QCD}\) used for different numbers of active flavours.

Implements ThePEG::AlphaSBase.

Definition at line 132 of file alpha_s.h.

References ThePEG::sqrt().

◆ matched()

bool matchbox::alpha_s::matched ( ) const
inline

return true, if threshold matching has been performed

Definition at line 221 of file alpha_s.h.

Referenced by operator()().

◆ max_active_flavours() [1/2]

unsigned int matchbox::alpha_s::max_active_flavours ( ) const
inline

return maximum number of active flavours

Definition at line 174 of file alpha_s.h.

◆ max_active_flavours() [2/2]

void matchbox::alpha_s::max_active_flavours ( unsigned int  nf)
inline

set maximum number of active flavours

Definition at line 177 of file alpha_s.h.

◆ min_active_flavours() [1/2]

unsigned int matchbox::alpha_s::min_active_flavours ( ) const
inline

return minimum number of active flavours

Definition at line 168 of file alpha_s.h.

◆ min_active_flavours() [2/2]

void matchbox::alpha_s::min_active_flavours ( unsigned int  nf)
inline

set minimum number of active flavours

Definition at line 171 of file alpha_s.h.

◆ operator()() [1/2]

double matchbox::alpha_s::operator() ( Energy2  scale) const
inline

return alpha_s as function of scale

Definition at line 143 of file alpha_s.h.

References active_flavours(), matched(), and operator()().

Referenced by operator()(), and value().

◆ operator()() [2/2]

virtual double matchbox::alpha_s::operator() ( Energy2  scale,
Energy2  lambda2,
unsigned int  nf 
) const
pure virtual

return alpha_s as function of scale, QCD scale and number of active flavours

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

◆ 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.

◆ quark_mass_squared() [1/2]

Energy2 matchbox::alpha_s::quark_mass_squared ( unsigned int  f) const
inline

return the mass squared for given flavour

Definition at line 201 of file alpha_s.h.

Referenced by active_flavours().

◆ quark_mass_squared() [2/2]

void matchbox::alpha_s::quark_mass_squared ( unsigned int  f,
Energy2  m2 
)
inline

set the mass squared for given flavour

Definition at line 207 of file alpha_s.h.

◆ scale_factor()

double matchbox::alpha_s::scale_factor ( ) const
inlineprotected

return the scale factor

Definition at line 243 of file alpha_s.h.

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

◆ 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 114 of file alpha_s.h.

References operator()().

Member Data Documentation

◆ alpha_s_in_

double matchbox::alpha_s::alpha_s_in_
private

Definition at line 298 of file alpha_s.h.

◆ fixed_

bool matchbox::alpha_s::fixed_
private

Definition at line 303 of file alpha_s.h.

◆ 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 277 of file alpha_s.h.

◆ lambda_range_

pair<Energy2,Energy2> matchbox::alpha_s::lambda_range_
private

Definition at line 301 of file alpha_s.h.

◆ lambda_squared_

std::array<Energy2,7> matchbox::alpha_s::lambda_squared_
private

Definition at line 295 of file alpha_s.h.

◆ matched_

bool matchbox::alpha_s::matched_
private

Definition at line 290 of file alpha_s.h.

◆ max_active_flavours_

unsigned int matchbox::alpha_s::max_active_flavours_
private

Definition at line 288 of file alpha_s.h.

◆ min_active_flavours_

unsigned int matchbox::alpha_s::min_active_flavours_
private

Definition at line 287 of file alpha_s.h.

◆ nfvector

vector<Energy2> matchbox::alpha_s::nfvector =vector<Energy2>(6)
private

Definition at line 296 of file alpha_s.h.

◆ quark_masses_squared_

std::array<Energy2,7> matchbox::alpha_s::quark_masses_squared_
private

Definition at line 294 of file alpha_s.h.

◆ scale_factor_

double matchbox::alpha_s::scale_factor_
private

Definition at line 292 of file alpha_s.h.

◆ scale_in_

Energy matchbox::alpha_s::scale_in_
private

Definition at line 299 of file alpha_s.h.


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