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upsilon particle
(redirected from upsilon)

   Also found in: Dictionary/thesaurus, Medical, Wikipedia 0.01 sec.
upsilon particle [′əp·sə·lən ‚pärd·ə·kəl]
(particle physics)
One of a family of elementary particles having about 10 times the mass of the proton and consisting of an atomlike combination of a bottom quark with its antiquark.


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