Calculate alpha_s(Q2) by an analytic approximation.
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#include <AlphaS.h>
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std::string | type () const |
| Implementation type of this solver.
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double | alphasQ2 (double q2) const |
| Calculate alphaS(Q2)
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int | numFlavorsQ2 (double q2) const |
| Analytic has its own numFlavorsQ2 which respects the min/max nf set by the Lambdas.
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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.
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virtual | ~AlphaS () |
| Destructor.
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double | alphasQ (double q) const |
| Calculate alphaS(Q)
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int | numFlavorsQ (double q) const |
| Calculate the number of active flavours at energy scale Q.
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double | quarkMass (int id) const |
| Get a quark mass by PDG code.
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void | setQuarkMass (int id, double value) |
| Set quark masses by PDG code.
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double | quarkThreshold (int id) const |
| Get a flavor scale threshold by PDG code.
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void | setQuarkThreshold (int id, double value) |
| Set a flavor threshold by PDG code (= quark masses by default)
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int | orderQCD () |
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void | setOrderQCD (int order) |
| Set the order of QCD (expressed as number of loops)
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void | setMZ (double mz) |
| Set the Z mass used in this alpha_s.
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void | setAlphaSMZ (double alphas) |
| Set the alpha_s(MZ) used in this alpha_s.
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void | setMassReference (double mref) |
| Set the Z mass used in this alpha_s.
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void | setAlphaSReference (double alphas) |
| Set the alpha_s(MZ) used in this alpha_s.
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void | setFlavorScheme (FlavorScheme scheme, int nf=-1) |
| Set flavor scheme of alpha_s solver.
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FlavorScheme | flavorScheme () const |
| Get flavor scheme.
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double | _lambdaQCD (int nf) const |
| Get lambdaQCD for nf.
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void | _setFlavors () |
| Recalculate min/max flavors in case lambdas have changed.
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std::map< int, double > | _lambdas |
| LambdaQCD values.
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int | _nfmax |
| Max number of flavors.
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int | _nfmin |
| Min number of flavors.
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enum | FlavorScheme { FIXED
, VARIABLE
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| Enum of flavor schemes.
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double | _beta (int i, int nf) const |
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std::vector< double > | _betas (int nf) const |
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int | _qcdorder |
| Order of QCD evolution (expressed as number of loops)
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double | _mz |
| Mass of the Z boson in GeV.
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double | _alphas_mz |
| Value of alpha_s(MZ)
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double | _mreference |
| Reference mass in GeV.
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double | _alphas_reference |
| Value of alpha_s(reference mass)
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bool | _customref |
| Decides whether to use custom reference values or fall back on MZ/AlphaS_MZ.
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std::map< int, double > | _quarkmasses |
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std::map< int, double > | _flavorthresholds |
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FlavorScheme | _flavorscheme |
| The flavor scheme in use.
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int | _fixflav |
| The allowed numbers of flavours in a fixed scheme.
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Calculate alpha_s(Q2) by an analytic approximation.
◆ alphasQ2()
double LHAPDF::AlphaS_Analytic::alphasQ2 |
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double | q2 | ) |
const |
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virtual |
◆ numFlavorsQ2()
int LHAPDF::AlphaS_Analytic::numFlavorsQ2 |
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double | q2 | ) |
const |
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virtual |
Analytic has its own numFlavorsQ2 which respects the min/max nf set by the Lambdas.
Reimplemented from LHAPDF::AlphaS.
◆ setLambda()
void LHAPDF::AlphaS_Analytic::setLambda |
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unsigned int | i, |
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double | lambda ) |
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virtual |
Set lambda_i (for i = flavour number)
Reimplemented from LHAPDF::AlphaS.
◆ type()
std::string LHAPDF::AlphaS_Analytic::type |
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const |
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inlinevirtual |
The documentation for this class was generated from the following file:
- /home/abuild/rpmbuild/BUILD/python3.11/include/LHAPDF/AlphaS.h