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…

CMS has made the first search in the two-photon and two-bottom-quark final state for a heavy particle with masses from one to four trillion electronvolts. In a first of its kind, CMS has carried out a search for a heavy particle, X, with masses beyo…