Matter's Missing Piece Shows Up | Science News

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Matter's Missing Piece Shows Up

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4:24pm, March 24, 2003

Physicists have found the first direct evidence for the last of the 12 subatomic particles considered the  fundamental building blocks of matter. A research team from the United States, Japan, Korea, and Greece has unveiled four sets of particle tracks that it attributes to the long-sought tau neutrino.

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