UPQUARK

Up quark

The up quark or u quark is the lightest of all quarks, a type of elementary particle, and a major constituent of matter. It, along with the down quark, forms the neutrons and protons of atomic nuclei. It is part of the first generation of matter, has an electric charge of + e and a bare mass of 1.8–. Like all quarks, the up quark is an elementary fermion with spin-spin-1/2, and experiences all four fundamental interactions: gravitation, electromagnetism, weak interactions, and strong interactions. The antiparticle of the up quark is the up antiquark, which differs from it only in that some of its properties have equal magnitude ...

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up quark

Noun

  1. A quark having a fractional electric charge of +2/3 and a mass of about 1.5 to 4 MeV. Symbol: u


The above text is a snippet from Wiktionary: up quark
and as such is available under the Creative Commons Attribution/Share-Alike License.

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