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Standard Model of Particle Physics
The Standard Model of particle physics is the theoretical framework describing the fundamental constituents of matter and three of the four known forces — electromagnetic, weak nuclear, and strong nuclear — as interactions between elementary particles mediated by force-carrying bosons.
Overview
Developed through the collective work of many physicists between the 1960s and 1970s, the Standard Model is built from gauge symmetry groups — abstract algebraic structures that dictate which particles and forces are consistent with the theory. It was completed with the discovery of the Higgs boson at CERN in 2012, the last predicted particle confirmed experimentally after a decades-long search.
Why it matters
As the most precisely tested theory in science, the Standard Model represents the most advanced mathematical framework ever validated against experiment, with predictions matching observations to more than ten decimal places in some cases. Yet it leaves profound questions open — it does not incorporate gravity, dark matter, or dark energy — making it both the greatest achievement and a critical signpost toward deeper physics.
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