It was formulated in the 1970s and has withstood all experimental tests. It has only been modified by adding mass to the electron neutrino. Physicists are currently looking for its most audacious prediction, the [[Higgs boson]]. | It was formulated in the 1970s and has withstood all experimental tests. It has only been modified by adding mass to the electron neutrino. Physicists are currently looking for its most audacious prediction, the [[Higgs boson]]. |