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

eko.quantities.couplings module

Types and quantities related to theory couplings.

class eko.quantities.couplings.CouplingsInfo(alphas: float, alphaem: float, scale: float, max_num_flavs: int, num_flavs_ref: int | None, em_running: bool = False)[source]

Bases: DictLike

Reference values for coupling constants.

Also includes further information, defining the run of the couplings.

alphas: float

alphaem: float

scale: float

max_num_flavs: int

num_flavs_ref: int | None

Number of active flavors at strong coupling reference scale.

I.e. \(n_{f,\text{ref}}(\mu^2_{\text{ref}})\), formerly called nfref.

em_running: bool = False

property values: Collect only couplings values.

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

Bases: Enum

Beta functions solution method.

EXACT = 'exact'

EXPANDED = 'expanded'

eko.quantities.heavy_quarks module

Heavy quarks related quantities.

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

Bases: list, Generic[T]

Access heavy quarks attributes by name.

property c: T: Charm quark.

property b: T: Bottom quark.

property t: T: Top quark.

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.

MSBAR = 'msbar'

POLE = 'pole'

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

Bases: DictLike

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.

num_flavs_init: int

Number of active flavors at fitting scale.

I.e. \(n_{f,\text{ref}}(\mu^2_0)\), formerly called nf0.

num_flavs_max_pdf: int: Maximum number of quark PDFs.

intrinsic_flavors: List[int]: List of intrinsic quark PDFs.

masses: HeavyQuarks[ReferenceRunning[float]]: List of heavy quark masses.

masses_scheme: QuarkMassScheme: Scheme used to specify heavy quark masses.

matching_ratios: HeavyQuarks[float]: Matching scale of heavy quark masses

property squared_ratios: List[float]: Squared ratios of matching scales.