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Confusing T-shirt from CERN

The leaflet that came with this shirt says "This equation neatly sums up our current understanding of fundamental particles and forces. It represents mathematically what we call the standard model of particle physics. The top line describes the forces: electricity, magnetism and the strong and weak nuclear forces. The second line describes how these forces act on the fundamental particles of matter, namely the quarks and leptons. The third line describes how these particles obtain their masses from the Higgs boson, and the fourth line enables the Higgs boson to do the job. Many experiments at CERN and other laboratories have verified the top two lines in detail. One of the primary objectives of the LHC is to see whether the Higgs boson exists and behaves as predicted by the last two lines." It was a great present - fits my chest and goes well over my head

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Taken on March 29, 2008