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Evidence of key new quark reported by European lab

The European Center for Nuclear Research has announced that a team of 151 researchers, headed by Dr. Carlo Rubbia, had obtained experimental evidence of the existence of the T (for Top) quark, which it said was one of 12 subunits of particles called hadrons, including the protons and neutrons that make up the nuclei of atoms.

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Scientists at the same laboratory, known as CERN, last year discovered the ''Z-zero'' subatomic particle and the ''W'' particle.

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