Add Yahoo as a preferred source to see more of our stories on Google. Protons, made of three quarks, colliding For the first time, scientists have created oxygen-28, a rare oxygen isotope that has 12 ...
Ninety million times a year, when protons crash together at the Large Hadron Collider (LHC), they produce, in their wreckage, a top quark and an anti-top quark, the heaviest known elementary particles ...
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