In November 2014, CMS made history by releasing its first batch of open data, comprising approximately 27 terabytes of proton-proton collision data collected in 2010 at a 7 TeV center-of-mass energy.
New release of simulations, proton-lead collision data, and proton reference data The CMS experiment’s extensive collection of heavy ion data from LHC Run-1 (2010–2013) is now accessible through the CERN Open Data portal.