CMS sets the world’s most stringent constraints on anomalous interactions between the bosons that carry the electroweak force. A key prediction of the Standard Model of particle physics is how the carriers of the weak force – the W and Z boson…

  The CMS experiment uses data collected between 2016 and 2026 to observe, for the first time, leptons (electrons and muons) emitted from protons scattering off one another. Since the first high-energy proton colliders began operating more than…

  A new boosted jet technique, powered by machine learning, gives CMS its most sensitive search for Higgs bosons breaking apart into never-before-seen particles. Some theories predict that new light particles associated with the Higgs boson coul…