Calculate alpha_s(Q2) by an analytic approximation. More...
#include <AlphaS.h>
Public Member Functions | |
std::string | type () const |
Implementation type of this solver. | |
double | alphasQ2 (double q2) const |
Calculate alphaS(Q2) | |
int | numFlavorsQ2 (double q2) const |
Analytic has its own numFlavorsQ2 which respects the min/max nf set by the Lambdas. | |
void | setLambda (unsigned int i, double lambda) |
Set lambda_i (for i = flavour number) | |
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AlphaS () | |
Base class constructor for default param setup. | |
virtual | ~AlphaS () |
Destructor. | |
double | alphasQ (double q) const |
Calculate alphaS(Q) | |
int | numFlavorsQ (double q) const |
Calculate the number of active flavours at energy scale Q. | |
double | quarkMass (int id) const |
Get a quark mass by PDG code. | |
void | setQuarkMass (int id, double value) |
Set quark masses by PDG code. | |
double | quarkThreshold (int id) const |
Get a flavor scale threshold by PDG code. | |
void | setQuarkThreshold (int id, double value) |
Set a flavor threshold by PDG code (= quark masses by default) | |
int | orderQCD () |
void | setOrderQCD (int order) |
Set the order of QCD (expressed as number of loops) | |
void | setMZ (double mz) |
Set the Z mass used in this alpha_s. | |
void | setAlphaSMZ (double alphas) |
Set the alpha_s(MZ) used in this alpha_s. | |
void | setMassReference (double mref) |
Set the Z mass used in this alpha_s. | |
void | setAlphaSReference (double alphas) |
Set the alpha_s(MZ) used in this alpha_s. | |
void | setFlavorScheme (FlavorScheme scheme, int nf=-1) |
Set flavor scheme of alpha_s solver. | |
FlavorScheme | flavorScheme () const |
Get flavor scheme. | |
Private Member Functions | |
double | _lambdaQCD (int nf) const |
Get lambdaQCD for nf. | |
void | _setFlavors () |
Recalculate min/max flavors in case lambdas have changed. | |
Private Attributes | |
std::map< int, double > | _lambdas |
LambdaQCD values. | |
int | _nfmax |
Max number of flavors. | |
int | _nfmin |
Min number of flavors. | |
Additional Inherited Members | |
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enum | FlavorScheme { FIXED , VARIABLE } |
Enum of flavor schemes. | |
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double | _beta (int i, int nf) const |
std::vector< double > | _betas (int nf) const |
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int | _qcdorder |
Order of QCD evolution (expressed as number of loops) | |
double | _mz |
Mass of the Z boson in GeV. | |
double | _alphas_mz |
Value of alpha_s(MZ) | |
double | _mreference |
Reference mass in GeV. | |
double | _alphas_reference |
Value of alpha_s(reference mass) | |
bool | _customref |
Decides whether to use custom reference values or fall back on MZ/AlphaS_MZ. | |
std::map< int, double > | _quarkmasses |
std::map< int, double > | _flavorthresholds |
FlavorScheme | _flavorscheme |
The flavor scheme in use. | |
int | _fixflav |
The allowed numbers of flavours in a fixed scheme. | |
Calculate alpha_s(Q2) by an analytic approximation.
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virtual |
Calculate alphaS(Q2)
Implements LHAPDF::AlphaS.
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virtual |
Analytic has its own numFlavorsQ2 which respects the min/max nf set by the Lambdas.
Reimplemented from LHAPDF::AlphaS.
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virtual |
Set lambda_i (for i = flavour number)
Reimplemented from LHAPDF::AlphaS.
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inlinevirtual |
Implementation type of this solver.
Implements LHAPDF::AlphaS.