Candidate simulation release for first-round 21.9 Physics Validation, with updated HepMcParticleLink to avoid aliasing of eventIndex.
Security Notice: GitLab has uncovered a widespread malicious npm supply-chain attack that potentially can destroy user data. All teams are required to audit packages. Further information can be found under the Computer Security Report for November 2025 and the original blog post in https://about.gitlab.com/blog/gitlab-discovers-widespread-npm-supply-chain-attack/
Candidate simulation release for first-round 21.9 Physics Validation, with updated HepMcParticleLink to avoid aliasing of eventIndex.