, G. S. Guralnik ,  C. R. Hagen , and  T. W. B. Kibble  (1964) Discovered tentatively announced July 4, 2012 (see above), by the ATLAS  and  CMS  teams at the Large Hadron Collider Types 1 in the  Standard Model ; 5 or more in  supersymmetric models Mass 125.3 ± 0.6