The CMS experiment observed, for the first time, leptons—electrons and muons—emitted from protons scattering off one another, using data collected between 2016 and 2026. Predicted by the standard model, these lepton constituents originating from the protons had never been experimentally observed before.
This story is only covered by news sources that have yet to be evaluated by the independent media monitoring agencies we use to assess the quality and reliability of news outlets on our platform. Learn more here.