DOWNQUARK

Down quark

The down quark or d quark is the second-lightest of all quarks, a type of elementary particle, and a major constituent of matter. Together with the up quark, it 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 . Like all quarks, the down 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 down quark is the down antiquark, which differs from it only in that some of its properties have equal ...

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down quark

Noun

  1. A quark having a fractional electric charge of -1/3 and a mass about 4 to 8 MeV. Symbol: d


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

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