Enum pineappl::fk_table::FkAssumptions

pub enum FkAssumptions {
    Nf6Ind,
    Nf6Sym,
    Nf5Ind,
    Nf5Sym,
    Nf4Ind,
    Nf4Sym,
    Nf3Ind,
    Nf3Sym,
}

The optimization assumptions for an FkTable, needed for FkTable::optimize. Since FK tables are typically stored at very small Q2 = Q0, the PDFs f(x,Q0) of heavy quarks are typically set to zero at this scale or set to the same value as their anti-quark PDF. This is used to optimize the size of FK tables.

Variants

Nf6Ind

All quark PDFs are non-zero at the FK table scale and completely independent.

Nf6Sym

Like [Nf6Ind], but the PDFs of top and anti-top quarks are the same at FK table scale.

Nf5Ind

Like [Nf6Ind], but the PDFs of top and anti-top quarks are zero at FK table scale.

Nf5Sym

Like [Nf5Ind], but the PDFs of bottom and anti-bottom quarks are the same at FK table scale.

Nf4Ind

Like [Nf5Ind], but the PDFs of bottom and anti-bottom quarks are zero at FK table scale.

Nf4Sym

Like [Nf4Ind], but the PDFs of charm and anti-charm quarks are the same at FK table scale. PDF sets that make this assumption are NNPDF4.0 and NNPDF3.1 at fitting scale.

Nf3Ind

Like [Nf4Ind], but the PDFs of charm and anti-charm quarks are zero at FK table scale. PDF sets that make this assumption are MSHT20 and NNPDF3.0 at fitting scale.

Nf3Sym

Like [Nf3Ind], but the PDFs of strange and anti-strange are the same at FK table scale. A PDF set that makes this assumption is CT18 at fitting scale.

Trait Implementations

impl Clone for FkAssumptions

fn clone(&self) -> FkAssumptions

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for FkAssumptions

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for FkAssumptions

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq<FkAssumptions> for FkAssumptions

fn eq(&self, other: &FkAssumptions) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl TryFrom<&str> for FkAssumptions

type Error = UnknownFkAssumption

The type returned in the event of a conversion error.

fn try_from(value: &str) -> Result<Self, Self::Error>

Performs the conversion.

impl Copy for FkAssumptions

impl StructuralPartialEq for FkAssumptions