pub struct LumiCache<'a> { /* private fields */ }Expand description
A cache for evaluating PDFs. Methods like Grid::convolute accept instances of this struct
instead of the PDFs themselves.
Implementations§
source§impl<'a> LumiCache<'a>
impl<'a> LumiCache<'a>
sourcepub fn with_two(
pdg1: i32,
xfx1: &'a mut dyn FnMut(i32, f64, f64) -> f64,
pdg2: i32,
xfx2: &'a mut dyn FnMut(i32, f64, f64) -> f64,
alphas: &'a mut dyn FnMut(f64) -> f64
) -> Self
pub fn with_two( pdg1: i32, xfx1: &'a mut dyn FnMut(i32, f64, f64) -> f64, pdg2: i32, xfx2: &'a mut dyn FnMut(i32, f64, f64) -> f64, alphas: &'a mut dyn FnMut(f64) -> f64 ) -> Self
Construct a luminosity cache with two PDFs, xfx1 and xfx2. The types of hadrons the
PDFs correspond to must be given as pdg1 and pdg2. The function to evaluate the
strong coupling must be given as alphas. The grid that the cache will be used with must
be given as grid; this parameter determines which of the initial states are hadronic, and
if an initial states is not hadronic the corresponding ‘PDF’ is set to xfx = x. If some
of the PDFs must be charge-conjugated, this is automatically done in this function.
sourcepub fn with_one(
pdg: i32,
xfx: &'a mut dyn FnMut(i32, f64, f64) -> f64,
alphas: &'a mut dyn FnMut(f64) -> f64
) -> Self
pub fn with_one( pdg: i32, xfx: &'a mut dyn FnMut(i32, f64, f64) -> f64, alphas: &'a mut dyn FnMut(f64) -> f64 ) -> Self
Construct a luminosity cache with a single PDF xfx. The type of hadron the PDF
corresponds to must be given as pdg. The function to evaluate the strong coupling must be
given as alphas. The grid that the cache should be used with must be given as grid;
this parameter determines which of the initial states are hadronic, and if an initial
states is not hadronic the corresponding ‘PDF’ is set to xfx = x. If some of the PDFs
must be charge-conjugated, this is automatically done in this function.
sourcepub fn xfx1(&mut self, pdg_id: i32, ix1: usize, imu2: usize) -> f64
pub fn xfx1(&mut self, pdg_id: i32, ix1: usize, imu2: usize) -> f64
Return the PDF (multiplied with x) for the first initial state.
sourcepub fn xfx2(&mut self, pdg_id: i32, ix2: usize, imu2: usize) -> f64
pub fn xfx2(&mut self, pdg_id: i32, ix2: usize, imu2: usize) -> f64
Return the PDF (multiplied with x) for the second initial state.
sourcepub fn alphas(&mut self, imu2: usize) -> f64
pub fn alphas(&mut self, imu2: usize) -> f64
Return the strong coupling for the renormalization scale set with LumiCache::set_grids,
in the grid mu2_grid at the index imu2.