eko.quantities package

Physical and internal objects.

This subpackage contains the definitions of many objects, with the purpose of using them as type hints, but not only (at least for some of them).

Few related functions are also defined here.

Submodules

Types and quantities related to theory couplings.

class eko.quantities.couplings.CouplingsInfo(alphas: float, alphaem: float, ref: Tuple[float, int], em_running: bool = False)[source]

Reference values for coupling constants.

alphas: float: Reference QCD coupling \(\alpha_s(\mu_R^0)^{(n_f^0)}\).

Note

We refer to \(\alpha_s\) here instead of \(a_s = \alpha_s/(4\pi)\) as we do otherwise.

class eko.quantities.couplings.CouplingEvolutionMethod(value)[source]

Bases: Enum

Beta functions solution method.

Heavy quarks related quantities.

class eko.quantities.heavy_quarks.HeavyQuarks(args: Sequence[T])[source]

Access heavy quarks attributes by name.

eko.quantities.heavy_quarks.HeavyQuarkMasses: alias of HeavyQuarks[ReferenceRunning[float]]

eko.quantities.heavy_quarks.MatchingRatios: alias of HeavyQuarks[float]

eko.quantities.heavy_quarks.MatchingScales: alias of HeavyQuarks[float]

class eko.quantities.heavy_quarks.QuarkMassScheme(value)[source]

Bases: Enum

Scheme to define heavy quark masses.

class eko.quantities.heavy_quarks.HeavyInfo(masses: HeavyQuarks[ReferenceRunning[float]], masses_scheme: QuarkMassScheme, matching_ratios: HeavyQuarks[float])[source]

Collect information about heavy quarks.

This is meant to be used mainly as a theory card section, and to be passed around when all or a large part of this information is required.

Note

All scales and ratios in this structure are linear, so you can consider them as quantities in \(GeV\) or ratios of them.