Main purpose of the build: fixes for ParticleGun, EvtGen and FixHepMC(which allow for H7 production for leptoquarks) Contains MRs: https://gitlab.cern.ch/atlas/athena/-/merge_requests/63385 Implement the classificiation functions for particles in Athena https://gitlab.cern.ch/atlas/athena/-/merge_requests/63686 Mark the beam particles for the particle gun. https://gitlab.cern.ch/atlas/athena/-/merge_requests/63751 MadGraphControl: fix for gridpacks https://gitlab.cern.ch/atlas/athena/-/merge_requests/63757 Introduce PYTHIA8LHESTATUS constant instead of a hardcoded number https://gitlab.cern.ch/atlas/athena/-/merge_requests/63746 Improvements in AtlasPID https://gitlab.cern.ch/atlas/athena/-/merge_requests/63737 Remove expressions with Truthparticle::status()%1000 https://gitlab.cern.ch/atlas/athena/-/merge_requests/63848 ParticleGun: fix pdgid and status of incoming particles https://gitlab.cern.ch/atlas/athena/-/merge_requests/63059 Avoid removing particles from the GenEvent after SimHit creation has started https://gitlab.cern.ch/atlas/athena/-/merge_requests/63731 Use isGenStable from TruthUtils inside the TruthParticle class https://gitlab.cern.ch/atlas/athena/-/merge_requests/63873 Cleanup in HepMCHelpers https://gitlab.cern.ch/atlas/athena/-/merge_requests/63900 Add HepMC::HERWIG7INTERMEDIATESTATUS constant https://gitlab.cern.ch/atlas/athena/-/merge_requests/63456 Move the `WeightHelpers` to its only client https://gitlab.cern.ch/atlas/athena/-/merge_requests/63958 Use MC namespace instead of MC::PID namespace. https://gitlab.cern.ch/atlas/athena/-/merge_requests/63945 Merge two versions of MagicNumbers.h https://gitlab.cern.ch/atlas/athena/-/merge_requests/63941 Introduce Geantinos in the Athena https://gitlab.cern.ch/atlas/athena/-/merge_requests/63830 Herwig7_i: Clean-up of Herwig7 implementation in Athena https://gitlab.cern.ch/atlas/athena/-/merge_requests/64011 Move the isBSM function into TruthUtils https://gitlab.cern.ch/atlas/athena/-/merge_requests/64022 Externals Update, master branch (2023.06.29.) https://gitlab.cern.ch/atlas/athena/-/merge_requests/63995 GeneratorFilters: add MuDstarFilter https://gitlab.cern.ch/atlas/athena/-/merge_requests/64095 PowhegControl: adding mass_rwg_frac parameter in gg4l process - AGENE-2207 https://gitlab.cern.ch/atlas/athena/-/merge_requests/64096 Fix missing 2->2 vertices in Herwig7/HepMC3 https://gitlab.cern.ch/atlas/athena/-/merge_requests/64010 Use predicates instead of explicit checks of the status codes. https://gitlab.cern.ch/atlas/athena/-/merge_requests/63381 PhysLite improvements from h4l https://gitlab.cern.ch/atlas/athena/-/merge_requests/64020 Predicates in filters https://gitlab.cern.ch/atlas/athena/-/merge_requests/63690 Added a test to the TruthUtils/AtlasPID https://gitlab.cern.ch/atlas/athena/-/merge_requests/64119 Update AtlasPID.h to make the particles with 7 digit ids starting with 99 pass isValid() https://gitlab.cern.ch/atlas/athena/-/merge_requests/64140 Rename master -> main in readmes and other txt files https://gitlab.cern.ch/atlas/athena/-/merge_requests/64160 Add missing barcodes for EvtGen decay products and python generators (eg. PG) https://gitlab.cern.ch/atlas/athena/-/merge_requests/64142 [AGENE-2186] introducing functionality to change parameters for run stages in PowhegControl multicore https://gitlab.cern.ch/atlas/athena/-/merge_requests/64023 A step towards unification of HepMCHelpers definitions https://gitlab.cern.ch/atlas/athena/-/merge_requests/64013 Drop the PdtPdg.h