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The 1988 Nobel Prize in Physics, Leon M. Lederman |
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With the discovery of the
charm quark, physicists wondered if there were more than just four quarks.
Soon their question was answered when Leon Lederman (The
Nobel Prize in Physics 1988) and his group discovered a 5th quark.
It was called the bottom (b) quark and had a charge of -1/3.
Physicists expected that a matching
quark of charge +2/3 (a top or t quark) would soon be found.
Unfortunately, close to 20 years passed without the discovery
of the matching quark.
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