Calculate alpha_s(Q2) by an analytic approximation. More...
#include <AlphaS.h>
Inheritance diagram for LHAPDF::AlphaS_Analytic:
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) | |
 Public Member Functions inherited from LHAPDF::AlphaS | |
| 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. More... | |
| double | quarkThreshold (int id) const |
| Get a flavor scale threshold by PDG code. More... | |
| void | setQuarkThreshold (int id, double value) |
| Set a flavor threshold by PDG code (= quark masses by default) More... | |
| int | orderQCD () |
| void | setOrderQCD (int order) |
| Set the order of QCD (expressed as number of loops) More... | |
| void | setMZ (double mz) |
| Set the Z mass used in this alpha_s. More... | |
| void | setAlphaSMZ (double alphas) |
| Set the alpha_s(MZ) used in this alpha_s. More... | |
| void | setMassReference (double mref) |
| Set the Z mass used in this alpha_s. More... | |
| void | setAlphaSReference (double alphas) |
| Set the alpha_s(MZ) used in this alpha_s. More... | |
| 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 | |
| Public Types inherited from LHAPDF::AlphaS | |
| enum | FlavorScheme { FIXED , VARIABLE } |
| Enum of flavor schemes. | |
| Protected Member Functions inherited from LHAPDF::AlphaS | |
| double | _beta (int i, int nf) const |
| std::vector< double > | _betas (int nf) const |
| Protected Attributes inherited from LHAPDF::AlphaS | |
| 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. | |
Detailed Description
Calculate alpha_s(Q2) by an analytic approximation.
The documentation for this class was generated from the following file:
- /builds/hepcedar/lhapdf/include/LHAPDF/AlphaS.h
