PineAPPL

PineAPPL is a library for recording and storing predictions for high-energy physics observables independently of their parton distribution functions.

lib.rs:

PineAPPL is not an extension of APPLgrid.

Overview

The main type of this crate is Grid, which represents the interpolation grids that PineAPPL implements. Roughly speaking, a Grid is a three-dimensional array of Subgrid objects together with metadata. The three dimensions are

1. (perturbative) orders, represented by the type Order and accessible by Grid::orders(),
2. bins, whose limits can be accessed by Grid::bin_info(), and
3. channels, whose definition is returned by Grid::channels().

Subgrid is a trait and objects that implement it are of the type SubgridEnum. The latter is an enum of different types that are optimized to different scenarios: fast event filling, small storage profile, etc.

Metadata

Metadata is a collection of key--value pairs, in which both keys and values are String objects. In metadata anything a user whishes can be stored. However, there are special keys, which have meaning to PineAPPL and/or its CLI pineappl. This metadata enables the CLI to automatically generate plots that are correctly labeled, for instance. For more applications see also the CLI tutorial.