top quark(redirected from Topquark)
Also found in: Dictionary, Thesaurus.
Related to Topquark: bottom quark
top quark[′täp ‚kwärk]
A hypothetical quark that is postulated to have a mass of approximately 30-50 GeV, electric charge of +⅔, baryon number of ⅓, zero isotopic spin, strangeness, and charm, and a new quantum number associated with it. Also known as t quark; truth quark. Symbolized t.