charmonium


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charmonium

[chär′mō·nē·əm]
(particle physics)
A meson, such as the J /ψ particle, that is made up of the charmed quark c and its antiparticle .
References in periodicals archive ?
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.
This revolutionary technique of creating charmonium particles by proton-antiproton annihilations is also being used by the E760 collaboration to study the properties of other charmonium particles with unprecedented precision," says theorist Eric Braaten of Northwestern University in Evanston, Ill.