HepSim is a data catalog with predictions for particle physics. It includes data files before and after detector simulations for High-Luminosity LHC (HL-LHC), the International Linear Collider (ILC), future e+e- and pp circular colliders, such as FCC (“Future Circular Collider”), VLHC, Circular Electron Positron Collider (CEPC), Electron-Ion Collider and other experiments. It also includes simulated samples for the ongoing LHC experiments.

HepSim is a community resource. It is open to everyone who is interested in participating in this project. There are several ways to contribute to HepSim. You can:

• Generate events (LO+PS, NLO, etc.) and submit them to this catalog. They will be hosted under your name using one of the HepSim data storages.
• Generate files with predictions and make them available using a web server of your home institute.
• Create mirrors of HepSim data files and web front-end.
• Help generate events or process them using open-source programs for fast and full detector simulations.
• Develop new detectors and submit them to the HepSim tag and detector pages.
• Develop validation scripts illustrating calculations using HepSim data. The scripts will be hosted on the HepSim web page under your name.