J/psi particle

noun
\ˌjā-ˈsī-, -ˈpsī-\

Definition of J/psi particle 

: an unstable neutral fundamental particle of the meson group that has a mass about 6000 times the mass of an electron

called also J particle, J/psi, psi particle

First Known Use of J/psi particle

1977, in the meaning defined above

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Dictionary Entries near J/psi particle

JPEG

Jpn

JPP

J/psi particle

Jr

JSC

JSD

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The first known use of J/psi particle was in 1977

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