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charmed quark

American  

noun

Physics.
  1. the quark having electric charge 2/3 times the elementary charge and charm C = +1. It is more massive than the up, down, and strange quarks.


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The problem was that no known particles contained a charmed quark.

From Textbooks Aug. 12, 2015

The first three flavors had been known since the 1960s but the charmed quark was discovered only in 1974, the bottom in 1977, and the top in 1995.

From "A Brief History of Time: And Other Essays" by Stephen Hawking

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