The Higgs boson or Higgs particle is an elementary particle initially theorised in 1964,whose discovery was announced at CERN on 4 July 2012. The discovery confirms the existence of the Higgs field, which is pivotal to the Standard Model and other theories within particle physics. It would explain why some fundamental particles have mass when the symmetries controlling their interactions should require them to be massless, and why the weak force has a much shorter range than the electromagnetic force.