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IEVref:113-05-27ID:
Language:enStatus: Standard
Term: quark
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Definition: in the “standard model” of particles, one of six elementary particles combined in triples or in pairs with an antiparticle to constitute other particles

NOTE 1 The six types of quarks have names (called flavours): down (d), up (u), strange (s), charm (c), bottom (b) and top (t). They are fermions, bearing an electric charge equal to +2/3 or −1/3 elementary charge. Each quark has an antiparticle denoted by overlining its symbol.

NOTE 2 Quarks never occur isolated but only in combination, either in triplets such as neutron, proton or hyperons, or in pairs with antiquarks, as mesons. Quarks are the source of a short-distance strong interaction, which explains in particular the cohesion of atomic nuclei.


Publication date:2011-04
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Internal notes:2017-06-02: Cleanup - Remove Attached Image 113-05-27en.gif
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