1) Certain elementary particle
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https://www.crosswordclues.com/clue/charm-quark
The charm quark or c quark (from its symbol, c) is the third most massive of all quarks, a type of elementary particle. Charm quarks are found in hadrons, which are subatomic particles made of quarks. Example of hadrons containing charm quarks include the J/ψ meson ({SubatomicParticle|J/Psi}), D mesons ({SubatomicParticle|D}), charmed Sigma baryo...
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http://en.wikipedia.org/wiki/Charm_quark
(from the article `subatomic particle`) Up and down are the lightest varieties of quarks. Somewhat heavier are a second pair of quarks, charm () and strange (), with charges of +23 and 13, ... type of meson consisting of a charmed quark and a charmed antiquark. It has a mass of 3.1 GeV/c2, which is about 3.5 times larger than the mass ...
Found on
http://www.britannica.com/eb/a-z/c/59
[
n] - a quark with an electric charge of +2/3 and a mass 2900 times that of an electron and a charm of +1
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http://www.webdictionary.co.uk/definition.php?query=charm%20quark
noun a quark with an electric charge of +2/3 and a mass 2900 times that of an electron and a charm of +1
Found on
https://www.encyclo.co.uk/local/20974
No exact match found.
