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Third-party tools and licenses

This repository is a control plane around the standard HEP simulation and statistics toolchain. The tools below are external dependencies, invoked as installed programs/libraries — none of their source code is vendored into this tree (verified in the 2026-07-30 repo audit: the only C++ files here are three project-authored drivers that #include/link upstream headers and libraries). Each tool is the work of its own authors under its own license; consult each project's distribution for the authoritative license text.

Tool Role here Upstream license (as distributed)
MadGraph5_aMC@NLO matrix-element event generation UoI/NCSA-style open license (see upstream)
Pythia 8 parton shower + hadronization GPL v2/v3 (invoked as an external library; not vendored)
Delphes fast detector simulation GPL v3 (invoked as an external binary; not vendored)
Rivet / YODA particle-level analysis routines + histograms GPL v3
ATLAS SimpleAnalysis published SR-yield analysis routines Apache-2.0 (ATLAS public release)
RestFrames recursive-jigsaw reconstruction MIT (linked by the project-authored rjr_resolve.cc)
pyhf HistFactory statistical models, CLs limits Apache-2.0
SModelS independent simplified-model recasting cross-check GPL v3
MadAnalysis 5 independent recasting cross-check GPL v3
mplhep / matplotlib / numpy / scipy / uproot plotting + numerics + ROOT-file IO BSD/MIT-family
mapyde the reference pipeline this project reproduces and extends (arXiv:2306.11055) Apache-2.0
LHAPDF + PDF sets parton distribution functions GPL v3 (sets under their own terms)

Derivation notes (stated for completeness and credit):

  • src/ravel/physics/native_simpleanalysis.py is a from-scratch Python reimplementation of the selection logic of the ATLAS EwkCompressed2018 SimpleAnalysis routine (Apache-2.0), validated bit-for-bit against the upstream implementation's outputs (141/141 signal regions). It contains no copied upstream source.
  • native/src/rjr_resolve.cc is a project-authored driver that reconstructs the same recursive-jigsaw tree the ATLAS analysis defines, by calling the RestFrames library (MIT).
  • Delphes detector cards and MadGraph run/param cards used in runs are configuration files derived from the mapyde reference configurations (Apache-2.0).

HEPData content (published tables, likelihoods, efficiency maps) is public data released by the experimental collaborations for exactly this kind of reinterpretation use; per-record DOIs are cited in the run records that use them.