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Any of various elementary particles consisting of a charm quark and an antiquark.

[From charm.]


n, pl -nia
(Atomic Physics) physics an elementary particle that contains an antiquark and a charm quark
[C20: from charm (sense 7)]
References in periodicals archive ?
Its nature sparked a lot of interest in the theory community because it is charged and decays to charmonium.
The psi/J particle consists of a charm quark paired with a charm antiquark to form a combination known as charmonium.
Just as a hydrogen atom - which consists of an electron and a proton - has various energy levels, charmonium has a so-called ground state and a number of excited states.