Herwig 7.3.0
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Base class for the strong coupling. More...
#include <alpha_s.h>
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 &) | |
ReferenceCounted & | operator= (const ReferenceCounted &) |
Protected Member Functions inherited from ThePEG::Named | |
const Named & | operator= (const Named &other) |
const string & | name (const string &newName) |
version the version number of the object when written. | |
static AbstractClassDescription< alpha_s > | initalpha_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_s & | operator= (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) |
Base class for the strong coupling.
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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()().
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inlineprotectedvirtual |
Initialize this object after the setup phase before saving an EventGenerator to disk.
InitException | if 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().
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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.
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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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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().
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return true, if threshold matching has been performed
Definition at line 221 of file alpha_s.h.
Referenced by operator()().
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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().
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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.
The assignment operator is private and must never be called.
In fact, it should not even be implemented.
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return the mass squared for given flavour
Definition at line 201 of file alpha_s.h.
Referenced by active_flavours().
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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().
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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()().
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