CMS completes release of its entire Run 1 proton-proton data

The CMS experiment is one of the largest international scientific collaborations in history, with a broad program of activities at the forefront of particle physics research. As of December 5, 2022, all of the proton-proton data collected by CMS during Run 1 of the Large Hadron Collider (LHC) is now available through the CERN Open Data Portal. This completes the process that started in 2014 with the experiment’s very first open data release in experimental particle physics.