Enum FkAssumptions 

#[repr(C)]
pub enum FkAssumptions {
    Nf6Ind = 0,
    Nf6Sym = 1,
    Nf5Ind = 2,
    Nf5Sym = 3,
    Nf4Ind = 4,
    Nf4Sym = 5,
    Nf3Ind = 6,
    Nf3Sym = 7,
}

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 = 0

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

Nf6Sym = 1

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

Nf5Ind = 2

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

Nf5Sym = 3

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

Nf4Ind = 4

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

Nf4Sym = 5

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 = 6

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 = 7

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 duplicate 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 FromStr for FkAssumptions

type Err = Error

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self>

Parses a string s to return a value of this type.

impl PartialEq for FkAssumptions

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

Tests for self and other values to be equal, and is used by ==.

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

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

impl Copy for FkAssumptions

impl Eq for FkAssumptions

impl StructuralPartialEq for FkAssumptions